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Hudson Bayou Condition Report for 2015

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Pass

4 out of 4 indicators were rated as PASS.

All four indicators must pass
for the creek to be rated as PASS.

Learn more about how this report is created

  • Size: 2,406 acres
  • Location: North Sarasota County
  • Discharges into: Sarasota Bay

The Hudson Bayou Basin is entirely within the bounds of the City of Sarasota. Its surface water system has undergone significant alteration over the past century. The Sarasota County 1847 General Land Office Survey does not confirm Hudson Bayou but does show a few inland waterways. The 1959 USDA NRCS Soil Survey Map shows that Hudson Bayou extended about 1 mile inland from the bay through somewhat poorly drained soil associated with flatwoods. The survey also shows an area of well-drained soil likely consisting of scrub land north of the bayou, which continues north along the coast. For basin details see: Sarasota Bay Water Quality Management Plan (2012)

Creek Location Map

Water Chemistry Ratings - Freshwater Portion of the Creek

Total nitrogen, total phosphorus, chlorophyll a, and dissolved oxygen levels are monitored carefully by water resource managers and used by regulatory authorities to determine whether a creek meets the water quality standards mandated by the Clean Water Act. Shown below are water quality data for each freshwater stream segment. Florida law defines a threshold for the maximum allowable concentration of nitrogen, phosphorus, and chlorophyll a, and the minimum required concentration of dissolved oxygen in these streams. Learn more about these ratings and how they are calculated »

Data for the following WBIDs is averaged when compiling the data below:
  • 1953A
Pass

Chlorophyll a

Score: Pass
Units: mg/l Year
2015
Historical
period of record
High 0.0906 0.1568
Mean 0.0018 0.0013 0.01298081
Low 0.0003 0.0002
No. of Samples 48 502

Five-year Trend Graph

      
1/1/20112.1860.0021800mg/l0.0017600
2/1/20114.7760.0034800mg/l0.0044900
3/1/20114.0160.0036500mg/l0.0033500
4/1/20111.8960.0032100mg/l0.0018900
5/1/201111.2760.0048200mg/l0.0106300
6/1/20111.4460.0042600mg/l0.0014100
7/1/20111.1760.0040900mg/l0.0011700
8/1/20110.4960.0033800mg/l0.0004300
9/1/20110.4760.0027900mg/l0.0004400
10/1/20111.1160.0026600mg/l0.0010300
11/1/20110.6460.0008900mg/l0.0006100
12/1/20114.8060.0014500mg/l0.0017700
1/1/20122.6560.0016900mg/l0.0018100
2/1/20126.6460.0027200mg/l0.0024800
3/1/20125.9660.0036300mg/l0.0033200
4/1/20123.1360.0039700mg/l0.0019700
5/1/201280.6560.0173100mg/l0.0265300
6/1/20120.6260.0166100mg/l0.0006200
7/1/20120.6860.0162800mg/l0.0006000
8/1/20121.7160.0154600mg/l0.0017000
9/1/20120.4360.0145400mg/l0.0004100
10/1/20120.3460.0140700mg/l0.0003300
11/1/20124.6060.0014000mg/l0.0020900
12/1/20120.5460.0013800mg/l0.0004600
1/1/20131.7760.0015700mg/l0.0014900
2/1/20136.3460.0023400mg/l0.0030500
3/1/20131.1860.0024600mg/l0.0010200
4/1/20132.2460.0027800mg/l0.0021400
5/1/20133.2160.0025500mg/l0.0019500
6/1/20131.0360.0026300mg/l0.0009700
7/1/20130.6860.0024500mg/l0.0006400
8/1/20130.4760.0014700mg/l0.0004700
9/1/20130.4060.0013400mg/l0.0003700
10/1/20130.7560.0010900mg/l0.0007100
11/1/20130.4640.0006300mg/l0.0004000
12/1/20130.5760.0005600mg/l0.0004700
1/1/20140.4060.0005100mg/l0.0003700
2/1/20140.8570.0005700mg/l0.0008300
3/1/20142.1570.0008600mg/l0.0018400
4/1/20143.2270.0012800mg/l0.0024500
5/1/20140.9180.0013500mg/l0.0008900
6/1/20144.0080.0019200mg/l0.0026600
7/1/20140.4860.0019400mg/l0.0004700
8/1/20141.5570.0020500mg/l0.0009400
9/1/20141.5980.0019600mg/l0.0015800
10/1/20142.9070.0019100mg/l0.0021200
11/1/20140.5060.0018400mg/l0.0005000
12/1/20140.2960.0012200mg/l0.0002900
1/1/20151.1660.0013300mg/l0.0009300
2/1/20152.3660.0014700mg/l0.0022600
3/1/20152.6660.0016500mg/l0.0026500
4/1/20154.3440.0018900mg/l0.0041900
5/1/20153.0440.0023100mg/l0.0022500
6/1/20154.0760.0029400mg/l0.0032700
7/1/20150.7340.0028700mg/l0.0007300
8/1/20150.9940.0026400mg/l0.0009700
9/1/20151.0040.0023600mg/l0.0010000
10/1/201545.7920.0092700mg/l0.0094700
11/1/20150.3720.0088300mg/l0.0003600
Target
mg/l
Threshold
0.02 mg/l
Pass

Nitrogen, Total

Score: Pass
Units: mg/l Year
2015
Historical
period of record
High 2.704 3.059
Mean 1.3594 0.8798 0.38703302
Low 0.873 0.054
No. of Samples 8 231

Five-year Trend Graph

      
1/1/2011765.0020.7650000mg/l0.7633000
2/1/20111280.0021.0225000mg/l1.1619100
3/1/2011904.0020.9830000mg/l0.9016600
4/1/2011937.0020.9715000mg/l0.9228900
5/1/20111344.0021.0460000mg/l1.3065600
6/1/2011957.5021.0312500mg/l0.9522100
7/1/2011840.5021.0438300mg/l0.8404800
8/1/20111007.0020.9983300mg/l1.0055000
9/1/2011909.5020.9992500mg/l0.9069900
10/1/2011919.0020.9962500mg/l0.9188400
11/1/2011672.5020.8843300mg/l0.6724000
12/1/2011758.0020.8510800mg/l0.7579900
1/1/2012832.0020.8496700mg/l0.8273300
2/1/2012847.0020.8230000mg/l0.8435800
3/1/20121024.0020.8420800mg/l0.9293400
4/1/2012854.5020.8313300mg/l0.8190700
5/1/20121207.5020.9205000mg/l1.0121400
6/1/20121247.0021.0020000mg/l1.2466400
7/1/2012988.0021.0280000mg/l0.9869300
8/1/2012772.5021.0155800mg/l0.7690000
9/1/2012936.0021.0009200mg/l0.9331500
10/1/20121027.0021.0296700mg/l1.0218200
11/1/2012945.5020.9860000mg/l0.9336100
12/1/2012873.0020.9236700mg/l0.8594900
1/1/2013741.0020.8825000mg/l0.7293300
2/1/2013980.0020.9170800mg/l0.9556700
3/1/2013658.5020.8708300mg/l0.6533100
4/1/2013174.0020.7286700mg/l0.1260000
5/1/20131111.5020.7563300mg/l1.0239000
6/1/2013919.0020.7640000mg/l0.8978600
7/1/20131325.0020.8613300mg/l1.3241700
8/1/20131125.0020.8855000mg/l1.1248200
9/1/20131162.5020.9695000mg/l1.1569500
10/1/20131151.0021.1323300mg/l1.1484200
12/1/20131110.5021.1748000mg/l1.1089600
1/1/20141035.0041.1168000mg/l1.0111300
2/1/20141039.0041.0996000mg/l1.0374400
3/1/2014878.5041.0428000mg/l0.8732900
4/1/20141746.5041.1619000mg/l1.6192300
5/1/2014885.0041.1157500mg/l0.8832300
6/1/20142455.0021.3398300mg/l2.3795400
7/1/20141086.0021.3483300mg/l1.0818400
8/1/2014899.0021.3250000mg/l0.8923700
9/1/20141259.5021.3885000mg/l1.2580500
10/1/20141336.0041.3200800mg/l1.3359400
11/1/2014905.5041.3235000mg/l0.9045500
12/1/20141017.5041.0839200mg/l1.0166900
1/1/2015929.5021.0578300mg/l0.9277800
2/1/20151243.0021.1151700mg/l1.2178000
3/1/20152509.0021.3234200mg/l2.5014100
6/1/20151211.5021.4732500mg/l1.2084800
Pass

Phosphorus, Total

Score: Pass
Units: mg/l Year
2015
Historical
period of record
High 0.985 4.05
Mean 0.4602 0.4608 0.38468554
Low 0.212 0.15
No. of Samples 48 522

Five-year Trend Graph

      
1/1/2011338.0060.3380000mg/l0.3098700
2/1/20112328.0061.3330000mg/l1.5666200
3/1/2011711.5061.1258300mg/l0.6922200
4/1/2011538.0060.9788800mg/l0.5029500
5/1/2011780.0060.9391000mg/l0.7614700
6/1/2011460.0060.8592500mg/l0.4327400
7/1/2011515.5060.8888300mg/l0.5026200
8/1/2011475.0060.5800000mg/l0.4468800
9/1/2011543.0060.5519200mg/l0.5130000
10/1/2011548.5060.5536700mg/l0.5060800
11/1/2011476.5060.5030800mg/l0.4264900
12/1/2011465.0060.5039200mg/l0.4117900
1/1/2012658.5060.5277500mg/l0.5059200
2/1/2012620.0060.5519200mg/l0.5304300
3/1/2012913.5060.6136700mg/l0.8531600
4/1/2012839.5060.6621700mg/l0.7146500
5/1/20121100.0060.7660800mg/l1.0554100
6/1/2012337.5060.7448300mg/l0.3374700
7/1/2012435.5060.7076700mg/l0.3823500
8/1/2012275.0060.6501700mg/l0.2748200
9/1/2012468.5060.5760000mg/l0.3946300
10/1/2012415.5060.5053300mg/l0.3931300
11/1/2012448.5060.3967500mg/l0.3960300
12/1/2012532.5060.4292500mg/l0.4730500
1/1/2013487.5060.4379200mg/l0.4246100
2/1/2013913.0060.5442500mg/l0.7156000
3/1/2013669.0060.5776700mg/l0.5912600
4/1/2013635.5060.6143300mg/l0.5657300
5/1/2013958.5060.6993300mg/l0.8345100
6/1/2013333.5060.6661700mg/l0.3207000
7/1/2013527.5060.6728300mg/l0.4569700
8/1/2013425.0060.5915000mg/l0.4105200
9/1/2013369.0060.5415000mg/l0.3442000
10/1/2013420.5060.5056700mg/l0.3952600
11/1/2013441.5040.4195000mg/l0.4143300
12/1/2013464.0060.4412500mg/l0.4250900
1/1/2014359.0080.4131700mg/l0.3167300
2/1/2014417.0080.4118300mg/l0.3909800
3/1/2014314.5080.4027500mg/l0.3026500
4/1/2014457.5080.4089200mg/l0.3957700
5/1/2014419.5080.4052500mg/l0.3867500
6/1/2014597.5080.4275000mg/l0.5377200
7/1/2014521.0080.4545000mg/l0.5161400
8/1/2014661.0080.4951700mg/l0.6544200
9/1/2014533.5080.5316700mg/l0.5288200
10/1/2014300.5080.5055000mg/l0.2945500
11/1/2014378.5080.4986700mg/l0.3304900
12/1/2014415.5080.4683300mg/l0.3605500
1/1/2015480.5060.4615800mg/l0.4112500
2/1/2015268.0060.3960800mg/l0.2667400
3/1/2015871.0060.4523300mg/l0.8635100
4/1/2015558.5040.4953300mg/l0.4929700
5/1/2015661.0040.5424200mg/l0.6208000
6/1/2015509.5060.5580800mg/l0.4861400
7/1/2015430.5040.5497500mg/l0.4086200
8/1/2015476.5040.5845000mg/l0.4719800
9/1/2015413.5040.5082500mg/l0.3920300
10/1/2015383.5020.4790800mg/l0.3430200
11/1/2015492.5020.4510000mg/l0.4545800
Target
mg/l
Threshold
0.49 mg/l
Pass

Dissolved Oxygen Saturation

Note: Low DO saturation also may be naturally influenced by inflows from nearby wetlands or groundwater sources.
Score: Pass
Units: percent (%) Year
2015
Historical
period of record
High 94.10 144.70
Mean 57.18 52.68 31.16249
Low 20.70 4.20
No. of Samples 34 558

Five-year Trend Graph

      
1/1/201162.951662.9500000percent (%)57.7800000
2/1/2011111.721687.3400000percent (%)106.7600000
3/1/201145.981673.5500000percent (%)40.5300000
4/1/2011114.041683.6700000percent (%)113.0900000
5/1/201133.211673.5800000percent (%)16.5300000
1/1/201260.25660.2500000percent (%)52.6700000
2/1/201262.50661.3800000percent (%)56.9300000
3/1/201270.00664.2500000percent (%)50.4800000
4/1/201250.05660.7000000percent (%)44.5300000
5/1/201228.80654.3200000percent (%)20.0200000
7/1/201248.40351.9500000percent (%)48.4000000
8/1/201260.65651.5800000percent (%)60.3000000
9/1/201279.70653.5200000percent (%)77.6200000
10/1/201258.40655.1900000percent (%)50.9200000
11/1/201250.60659.5500000percent (%)38.3600000
12/1/201259.15659.4800000percent (%)50.4700000
1/1/201396.40667.4800000percent (%)96.2800000
2/1/201328.60662.1400000percent (%)22.7700000
3/1/201366.691259.9700000percent (%)64.1400000
4/1/201330.15655.2700000percent (%)24.7300000
5/1/201341.52953.7500000percent (%)35.9400000
6/1/201327.35648.4500000percent (%)25.4000000
7/1/201349.74940.6800000percent (%)46.2900000
8/1/201362.65646.3500000percent (%)62.3700000
9/1/201363.55645.8300000percent (%)63.2400000
10/1/201362.90651.2900000percent (%)61.2500000
11/1/201374.07356.7100000percent (%)73.8600000
12/1/201354.45661.2300000percent (%)51.3400000
1/1/201448.55861.0300000percent (%)45.6800000
2/1/201484.50864.6700000percent (%)75.6700000
3/1/2014100.65870.8500000percent (%)100.4500000
4/1/201466.55871.4600000percent (%)65.2600000
5/1/201438.50865.5300000percent (%)35.1500000
6/1/201445.95864.1200000percent (%)37.7800000
7/1/201463.50866.6100000percent (%)61.1300000
8/1/201434.55858.2800000percent (%)30.0500000
9/1/201445.65849.1200000percent (%)42.5100000
10/1/201469.25849.5700000percent (%)69.2400000
11/1/201457.65852.7600000percent (%)55.1000000
12/1/201473.60857.3700000percent (%)63.5700000
1/1/201557.95656.4400000percent (%)55.5100000
2/1/201565.85661.6600000percent (%)64.3300000
3/1/201558.85663.8600000percent (%)57.6900000
6/1/201551.70658.5900000percent (%)51.4200000
7/1/201563.10259.8800000percent (%)63.0200000
8/1/201565.80259.8600000percent (%)65.7900000
9/1/201581.80265.6000000percent (%)80.8700000
10/1/201554.35263.3500000percent (%)50.4400000
11/1/201543.75260.0800000percent (%)37.1900000
Target
percent (%)
Threshold
38.00 percent (%)

BOD, Biochemical oxygen demand

Units: mg/l Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

      
1/1/20111.9361.9300000mg/l1.8400000
2/1/20111.1161.5200000mg/l1.1000000
3/1/20112.4561.8300000mg/l2.2400000
4/1/20111.0061.6200000mg/l0.9900000
5/1/20114.9262.2800000mg/l2.7300000
6/1/20111.9762.2300000mg/l1.6900000
7/1/20111.0962.0900000mg/l1.0200000
8/1/20110.5562.0000000mg/l0.5400000
9/1/20111.3561.8100000mg/l1.1900000
10/1/20111.6161.9200000mg/l1.4700000
11/1/20111.4061.3300000mg/l1.1700000
12/1/20110.5861.1000000mg/l0.5700000
1/1/20121.3421.1400000mg/l1.1500000
2/1/20121.3161.2700000mg/l1.0400000
3/1/20123.0461.5500000mg/l1.9300000
4/1/20121.6161.5500000mg/l1.1600000
5/1/20125.0462.1500000mg/l3.7100000
6/1/20122.0062.3900000mg/l2.0000000
7/1/20120.7762.3000000mg/l0.7700000
8/1/20121.9262.4000000mg/l1.9100000
9/1/20120.5661.9800000mg/l0.5500000
10/1/20120.5061.8000000mg/l0.5000000
11/1/20120.9761.1200000mg/l0.8500000
12/1/20120.7860.9200000mg/l0.7300000
1/1/20130.6960.9000000mg/l0.6600000
2/1/20134.0461.2600000mg/l1.9900000
3/1/20130.6361.2700000mg/l0.6100000
4/1/20130.9761.3500000mg/l0.8500000
5/1/20133.0761.7000000mg/l1.8600000
6/1/20130.7561.6900000mg/l0.7300000
7/1/20130.5461.6700000mg/l0.5400000
8/1/20130.5061.0800000mg/l0.5000000
9/1/20130.5061.0600000mg/l0.5000000
10/1/20130.5260.9800000mg/l0.5200000
11/1/20130.5040.5500000mg/l0.5000000
12/1/20130.5760.5200000mg/l0.5700000
1/1/20140.7970.5600000mg/l0.7500000
2/1/20140.9870.6400000mg/l0.9500000
3/1/20141.1680.7500000mg/l1.1500000
4/1/20141.0980.8500000mg/l0.9100000
5/1/20142.1481.1200000mg/l1.7100000
6/1/20140.7071.1400000mg/l0.6600000
7/1/20140.5171.1000000mg/l0.5100000
8/1/20140.9571.0900000mg/l0.9100000
9/1/20141.1581.0900000mg/l1.1400000
10/1/20141.2881.1200000mg/l1.2700000
11/1/20140.5170.8500000mg/l0.5100000
12/1/20140.5080.8200000mg/l0.5000000
1/1/20150.5960.8300000mg/l0.5900000
2/1/20150.9460.8300000mg/l0.8300000
3/1/201512.6562.7500000mg/l12.6400000
4/1/20151.0842.7100000mg/l0.9200000
5/1/20151.6242.9000000mg/l1.2800000
6/1/20150.7762.9400000mg/l0.7200000
7/1/20150.5942.9400000mg/l0.5800000
8/1/20150.6242.8900000mg/l0.6100000
9/1/20150.5740.8800000mg/l0.5600000
10/1/20151.7520.9900000mg/l1.2200000
11/1/20150.6520.8300000mg/l0.6400000

Color

Units: PCU Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

      

Escherichia coli

Units: cfu/100ml Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

      
4/1/20151401.0041401.0000000cfu/100ml882.6400000
5/1/20152379.5041890.2500000cfu/100ml1852.4200000
6/1/20151532.0041770.8300000cfu/100ml1454.2000000
7/1/2015866.5041544.7500000cfu/100ml778.9700000
8/1/2015475.0041330.8000000cfu/100ml193.0500000
9/1/2015546.0041200.0000000cfu/100ml472.2700000
10/1/2015669.5021078.0800000cfu/100ml657.8200000
11/1/2015491.502763.4200000cfu/100ml431.4100000
Target
cfu/100ml
Threshold
cfu/100ml

Nitrogen, Ammonia + Ammonium as N

Units: ug/l Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

      
1/1/201149.00649.0000000ug/l48.5000000
2/1/201170.00659.5000000ug/l56.0000000
3/1/2011157.50692.1700000ug/l147.7700000
4/1/2011116.00698.1300000ug/l101.5900000
5/1/2011198.506118.2000000ug/l145.0600000
6/1/2011113.506117.4200000ug/l98.4400000
7/1/2011113.006128.0800000ug/l83.6200000
8/1/2011114.006135.4200000ug/l97.5400000
9/1/201152.006117.8300000ug/l43.8200000
10/1/2011201.006132.0000000ug/l145.1900000
11/1/201161.006109.0800000ug/l52.5400000
12/1/201164.506100.9200000ug/l50.9900000
1/1/2012111.006100.5800000ug/l57.4100000
2/1/2012132.006103.5800000ug/l71.4400000
3/1/2012262.506138.6700000ug/l159.4800000
4/1/2012193.176137.3600000ug/l105.1400000
5/1/2012326.506181.6100000ug/l163.6900000
6/1/201299.506187.4500000ug/l98.9400000
7/1/201277.506181.8600000ug/l72.0700000
8/1/201222.006163.5300000ug/l20.4900000
9/1/2012135.006142.2800000ug/l95.9200000
10/1/201282.006123.7500000ug/l79.7700000
11/1/2012109.50687.5800000ug/l100.4900000
12/1/201294.00686.6700000ug/l80.2200000
1/1/201354.50682.8300000ug/l38.5700000
2/1/201387.50693.7500000ug/l87.3300000
3/1/2013125.50692.1700000ug/l61.3200000
4/1/2013172.006107.1700000ug/l72.4400000
5/1/2013150.506114.0000000ug/l87.4300000
6/1/201323.506102.2500000ug/l17.6600000
7/1/201350.006101.5000000ug/l27.1300000
8/1/201340.00693.5800000ug/l32.0000000
9/1/201338.00679.0000000ug/l30.9800000
10/1/201383.00664.1700000ug/l73.2700000
11/1/201343.50446.3300000ug/l25.1400000
12/1/201341.00649.2500000ug/l24.3300000
1/1/201473.621053.1900000ug/l22.9400000
2/1/201453.611055.4600000ug/l16.6400000
3/1/201429.211053.9900000ug/l8.7000000
4/1/201457.02849.6600000ug/l11.0200000
5/1/201414.63844.8500000ug/l2.8000000
6/1/2014109.631056.2900000ug/l25.7200000
7/1/201453.611052.9500000ug/l12.6900000
8/1/2014117.631063.6200000ug/l12.0200000
9/1/201428.811063.5600000ug/l5.6800000
10/1/201430.411059.1200000ug/l9.2100000
11/1/201445.611064.2800000ug/l14.2600000
12/1/201412.801048.1500000ug/l3.4800000
1/1/201551.50647.7900000ug/l35.3000000
2/1/2015364.00688.8600000ug/l225.1700000
3/1/2015223.506121.3000000ug/l222.3600000
4/1/2015145.504140.4900000ug/l47.5800000
5/1/2015190.004164.5500000ug/l116.6200000
6/1/2015121.006182.5800000ug/l108.2800000
7/1/2015104.004191.3300000ug/l97.2000000
8/1/2015151.504155.9200000ug/l139.7500000
9/1/201564.004129.3300000ug/l49.9600000
10/1/201572.002117.0800000ug/l65.9000000
11/1/201570.00297.0800000ug/l69.8200000

Nitrogen, Kjeldahl

Units: ug/l Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

      
1/1/2011550.506550.5000000ug/l549.8100000
2/1/20111148.006849.2500000ug/l1067.6200000
3/1/2011866.006854.8300000ug/l860.7700000
4/1/2011699.006815.8800000ug/l698.8800000
5/1/20111184.506889.6000000ug/l1123.4100000
6/1/2011860.006884.6700000ug/l838.7500000
7/1/2011716.006912.2500000ug/l709.2600000
8/1/2011762.506848.0000000ug/l760.1700000
9/1/2011772.506832.4200000ug/l770.2100000
10/1/2011692.006831.2500000ug/l687.1200000
11/1/2011554.006726.1700000ug/l545.9700000
12/1/2011579.006679.3300000ug/l575.4500000
1/1/2012691.006675.1700000ug/l654.7100000
2/1/2012762.006675.0800000ug/l746.8900000
3/1/2012994.506712.0800000ug/l884.0500000
4/1/2012806.506731.1700000ug/l755.0300000
5/1/20121196.006838.1700000ug/l994.7500000
6/1/2012959.506901.5800000ug/l958.1700000
7/1/2012795.006918.9200000ug/l794.8000000
8/1/2012649.006900.0800000ug/l645.4300000
9/1/2012689.006849.1700000ug/l685.2300000
10/1/2012684.506828.8300000ug/l682.5600000
11/1/2012599.006729.3300000ug/l590.4200000
12/1/2012562.006663.0800000ug/l555.0700000
1/1/2013474.006609.5800000ug/l469.7900000
2/1/2013849.006642.9200000ug/l777.5100000
3/1/2013500.506611.5000000ug/l445.8100000
4/1/201392.506512.8300000ug/l82.1600000
5/1/20131064.506590.4200000ug/l952.4000000
6/1/2013765.006624.2500000ug/l749.9500000
7/1/2013943.006702.4200000ug/l943.0000000
8/1/2013886.006708.5800000ug/l885.6200000
9/1/2013852.006767.1700000ug/l848.9500000
10/1/2013876.006897.7500000ug/l864.0800000
11/1/2013665.504831.2500000ug/l663.7300000
12/1/2013672.006815.7500000ug/l660.0800000
1/1/2014755.508784.5000000ug/l753.2300000
2/1/2014837.508776.4200000ug/l836.2600000
3/1/2014759.008760.9200000ug/l754.4500000
4/1/20141386.008845.9200000ug/l1222.0000000
5/1/2014696.508851.0800000ug/l673.2400000
6/1/20142185.0081103.2500000ug/l2143.2700000
7/1/2014802.5081111.0800000ug/l798.0400000
8/1/2014785.5081102.4200000ug/l758.1400000
9/1/20141105.0081160.0800000ug/l1104.7200000
10/1/20141165.0081123.2500000ug/l1164.4700000
11/1/2014634.0081112.8300000ug/l632.6100000
12/1/2014738.008871.6700000ug/l736.8600000
1/1/2015608.006839.2500000ug/l602.3100000
2/1/2015949.006866.5000000ug/l938.4700000
3/1/20152170.0061044.0000000ug/l2162.5200000
4/1/2015790.504981.5800000ug/l756.4500000
5/1/20151178.5041072.3300000ug/l1100.5500000
6/1/20151023.0061119.8300000ug/l1001.8400000
7/1/2015981.0041182.0000000ug/l964.5300000
8/1/2015968.5041185.2500000ug/l966.5500000
9/1/2015728.004944.9200000ug/l726.6100000
10/1/20151355.0021039.0000000ug/l1330.7900000
11/1/2015719.502962.5000000ug/l717.6500000

Nitrogen, Nitrite + Nitrate as N

Units: ug/l Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

      
1/1/2011214.506214.5000000ug/l213.2100000
2/1/2011132.006173.2500000ug/l64.8000000
3/1/201138.006128.1700000ug/l23.3200000
4/1/2011238.006155.6300000ug/l185.5900000
5/1/2011159.506156.4000000ug/l147.5800000
6/1/201197.506146.5800000ug/l38.6800000
7/1/2011124.506131.5800000ug/l83.3300000
8/1/2011244.506150.3300000ug/l244.4600000
9/1/2011137.006166.8300000ug/l51.3800000
10/1/2011227.006165.0000000ug/l204.2700000
11/1/2011118.506158.1700000ug/l53.9600000
12/1/2011179.006171.7500000ug/l168.2900000
1/1/2012141.006174.5000000ug/l46.8200000
2/1/201285.006147.9200000ug/l40.0000000
3/1/201229.506130.0000000ug/l14.8300000
4/1/201248.006100.1700000ug/l26.5300000
5/1/201211.50682.3300000ug/l10.1000000
6/1/2012287.506100.4200000ug/l286.7700000
7/1/2012193.006109.0800000ug/l182.0800000
8/1/2012123.506115.5000000ug/l123.3800000
9/1/2012247.006151.7500000ug/l199.9600000
10/1/2012342.506200.8300000ug/l305.6700000
11/1/2012346.506256.6700000ug/l239.4000000
12/1/2012311.006260.5800000ug/l196.5700000
1/1/2013267.006272.9200000ug/l183.4500000
2/1/2013131.006274.1700000ug/l42.2500000
3/1/2013158.006259.3300000ug/l62.7600000
4/1/201381.506215.8300000ug/l25.2200000
5/1/201347.006165.9200000ug/l18.9700000
6/1/2013154.006139.7500000ug/l147.2800000
7/1/2013382.006158.9200000ug/l379.1000000
8/1/2013239.006176.9200000ug/l238.9200000
9/1/2013310.506202.3300000ug/l307.7100000
10/1/2013275.006234.5800000ug/l266.7100000
11/1/2013323.504280.6700000ug/l305.1200000
12/1/2013438.506328.0800000ug/l433.2700000
1/1/2014279.508311.0000000ug/l227.4100000
2/1/2014201.508304.7500000ug/l173.4800000
3/1/2014119.508272.9200000ug/l118.8400000
4/1/2014360.508287.1700000ug/l360.5000000
5/1/2014188.508264.6700000ug/l143.2700000
6/1/2014270.008236.5800000ug/l202.1400000
7/1/2014283.508237.2500000ug/l219.4400000
8/1/2014113.508222.5800000ug/l59.7500000
9/1/2014154.508228.4200000ug/l128.6900000
10/1/2014171.008196.8300000ug/l169.5800000
11/1/2014271.508210.6700000ug/l258.3400000
12/1/2014279.508212.2500000ug/l267.3500000
1/1/2015321.506218.5800000ug/l289.6600000
2/1/2015294.006248.6700000ug/l273.4400000
3/1/2015339.006279.4200000ug/l338.6700000
4/1/2015134.004273.2500000ug/l32.5000000
5/1/201563.004238.5000000ug/l22.0900000
6/1/2015188.506223.3300000ug/l144.1200000
7/1/2015224.504207.1700000ug/l222.9300000
8/1/2015203.004192.0000000ug/l203.0000000
9/1/2015261.504179.0800000ug/l252.3700000
10/1/2015251.002198.5800000ug/l220.4600000
11/1/2015254.502230.5000000ug/l203.0000000

pH

Units: None Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

      
1/1/20117.8467.8400000None7.8400000
2/1/20117.6667.7500000None7.6600000
3/1/20117.8267.7700000None7.8200000
4/1/20117.6267.7400000None7.6200000
5/1/20117.3967.6700000None7.3900000
1/1/20127.5767.5700000None7.5600000
2/1/20127.6067.5900000None7.5900000
3/1/20127.4067.5200000None7.3900000
4/1/20127.4767.5100000None7.4700000
5/1/20127.3767.4800000None7.3700000
7/1/20127.2867.4200000None7.2700000
8/1/20127.4767.4000000None7.4600000
9/1/20127.0967.3400000None7.0800000
10/1/20127.2967.3000000None7.2900000
11/1/20127.1967.2600000None7.1800000
12/1/20127.3267.2700000None7.3200000
1/1/20137.4967.3100000None7.4900000
2/1/20137.0067.2300000None6.9900000
3/1/20137.28127.2600000None7.2800000
4/1/20137.1167.2300000None7.1100000
5/1/20137.2197.2400000None7.2100000
6/1/20136.9967.1800000None6.9900000
7/1/20137.3497.1600000None7.3400000
8/1/20137.4267.2300000None7.4200000
9/1/20137.3867.2400000None7.3800000
10/1/20137.3267.2800000None7.3200000
11/1/20137.2037.2800000None7.2000000
12/1/20137.5867.3700000None7.5800000
1/1/20147.3787.3800000None7.3700000
2/1/20147.4667.3900000None7.4600000
3/1/20147.3687.3800000None7.3600000
4/1/20147.3387.3800000None7.3300000
5/1/20147.2987.4000000None7.2800000
6/1/20147.5277.3900000None7.5200000
7/1/20147.2667.3700000None7.2600000
8/1/20147.2767.3400000None7.2600000
9/1/20147.3967.3400000None7.3800000
10/1/20147.3067.3400000None7.2900000
11/1/20147.3077.3400000None7.3000000
12/1/20147.5487.3400000None7.5400000
1/1/20157.2867.3500000None7.2700000
2/1/20157.3067.3500000None7.2900000
3/1/20157.3767.3500000None7.3700000
6/1/20157.1167.2700000None7.1100000
7/1/20157.2727.2600000None7.2600000
8/1/20157.2227.2400000None7.2100000
9/1/20157.3627.2400000None7.3500000
10/1/20157.2847.2500000None7.2700000
11/1/20157.2047.2400000None7.2000000

Rainfall

Units: inches Year
2015
Historical
period of record
High 40.58 53.67
Mean 14.1246563970007
Low 7.69
No. of Samples 365 5,270

Five-year Trend Graph

      
1/1/20113.22313.2200000inches3.2200000
2/1/20110.81280.8100000inches0.8100000
3/1/20116.28316.2800000inches6.2800000
4/1/20111.17301.1700000inches1.1700000
5/1/20112.00312.0000000inches2.0000000
6/1/20112.71302.7100000inches2.7100000
7/1/20117.65317.6500000inches7.6500000
8/1/20117.92317.9200000inches7.9200000
9/1/20115.26305.2600000inches5.2600000
10/1/20111.80311.8000000inches1.8000000
11/1/20110.95300.9500000inches0.9500000
12/1/20110.25300.2500000inches0.2500000
1/1/20120.31290.3100000inches0.3100000
2/1/20120.62290.6200000inches0.6200000
3/1/20121.72311.7200000inches1.7200000
4/1/20122.59242.5900000inches2.5900000
5/1/20121.20311.2000000inches1.2000000
6/1/201216.373016.3700000inches16.3700000
7/1/20123.13313.1300000inches3.1300000
8/1/20125.55315.5500000inches5.5500000
9/1/20122.57302.5700000inches2.5700000
10/1/20123.90313.9000000inches3.9000000
11/1/20120.01280.0100000inches0.0100000
12/1/20121.21311.2100000inches1.2100000
1/1/20130.19310.1900000inches0.1900000
2/1/20131.07231.0700000inches1.0700000
3/1/20131.38311.3800000inches1.3800000
4/1/20133.54303.5400000inches3.5400000
5/1/20133.07313.0700000inches3.0700000
6/1/201311.733011.7300000inches11.7300000
7/1/20137.96317.9600000inches7.9600000
8/1/201311.863111.8600000inches11.8600000
9/1/201310.963010.9600000inches10.9600000
10/1/20131.26311.2600000inches1.2600000
11/1/20130.58300.5800000inches0.5800000
12/1/20130.07310.0700000inches0.0700000
1/1/20142.29312.2900000inches2.2900000
2/1/20143.09283.0900000inches3.0900000
3/1/20144.87314.8700000inches4.8700000
4/1/20141.40291.4000000inches1.4000000
5/1/20145.78315.7800000inches5.7800000
6/1/20143.18303.1800000inches3.1800000
7/1/20144.32314.3200000inches4.3200000
8/1/20141.51281.5100000inches1.5100000
9/1/20146.61256.6100000inches6.6100000
10/1/20142.09292.0900000inches2.0900000
11/1/20142.69302.6900000inches2.6900000
12/1/20140.34310.3400000inches0.3400000
1/1/20151.52311.5200000inches1.5200000
2/1/20153.29283.2900000inches3.2900000
3/1/20150.87310.8700000inches0.8700000
4/1/20151.06301.0600000inches1.0600000
5/1/20152.77312.7700000inches2.7700000
6/1/20155.62305.6200000inches5.6200000
7/1/20158.99318.9900000inches8.9900000
8/1/20155.48315.4800000inches5.4800000
9/1/20156.00306.0000000inches6.0000000
10/1/20152.70312.7000000inches2.7000000
11/1/20150.54300.5400000inches0.5400000
12/1/20151.74311.7400000inches1.7400000
Target
inches
Threshold
inches

Salinity

Units: PSS Year
2015
Historical
period of record
High 12.42 12.42
Mean 0.41 0.37 1.34045
Low 0.11 0.04
No. of Samples 34 429

Five-year Trend Graph

      
1/1/20110.2560.2500000PSS0.2400000
2/1/20110.3660.3100000PSS0.3400000
3/1/20110.4360.3500000PSS0.4300000
4/1/20110.4360.3700000PSS0.4200000
5/1/20110.4260.3800000PSS0.4100000
1/1/20120.4760.4700000PSS0.4600000
2/1/20120.3760.4200000PSS0.3600000
3/1/20120.3260.3900000PSS0.3100000
4/1/20120.3660.3800000PSS0.3500000
5/1/20120.4560.3900000PSS0.4500000
7/1/20120.3960.3800000PSS0.3700000
8/1/20120.1360.3300000PSS0.1200000
9/1/20120.4260.3500000PSS0.4000000
10/1/20120.4360.3600000PSS0.4100000
11/1/20126.2961.5300000PSS2.2100000
12/1/20120.4361.3500000PSS0.4200000
1/1/20130.3761.3500000PSS0.3700000
2/1/20130.3661.3800000PSS0.3600000
3/1/20130.4261.3800000PSS0.4200000
4/1/20131.8361.6200000PSS1.0900000
5/1/20130.3460.6300000PSS0.3400000
6/1/20130.2660.6000000PSS0.2400000
7/1/20130.4560.6100000PSS0.4300000
8/1/20130.3460.6100000PSS0.3300000
9/1/20130.4260.6100000PSS0.4000000
10/1/20130.4060.3700000PSS0.3700000
12/1/20130.4060.4000000PSS0.3900000
1/1/20140.4180.3900000PSS0.3900000
2/1/20140.4280.4100000PSS0.4000000
3/1/20140.2380.3700000PSS0.2100000
4/1/20140.6680.4200000PSS0.5500000
5/1/20140.3080.4000000PSS0.2700000
6/1/20140.4180.4100000PSS0.4000000
7/1/20140.3380.3900000PSS0.3100000
8/1/20140.4280.3900000PSS0.4200000
9/1/20140.3080.4000000PSS0.2900000
10/1/20140.2180.3300000PSS0.2000000
11/1/20140.3380.3300000PSS0.3200000
12/1/20140.3780.3300000PSS0.3500000
1/1/20153.7560.9000000PSS1.5600000
2/1/20150.4060.8900000PSS0.3900000
3/1/20150.1160.8600000PSS0.1100000
6/1/20150.3961.1600000PSS0.3800000
7/1/20150.3420.3100000PSS0.3200000
8/1/20150.3320.2900000PSS0.3100000
9/1/20150.3220.3500000PSS0.3000000
10/1/20156.3321.5400000PSS1.6900000
11/1/20150.3521.3400000PSS0.3400000

Specific conductance

Units: umho Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

      
1/1/2011505.006505.0000000umho500.2600000
2/1/2011735.006620.0000000umho704.9500000
3/1/2011869.006703.0000000umho865.8400000
4/1/2011869.006744.5000000umho853.0000000
5/1/2011859.506767.5000000umho846.2200000
1/1/2012935.006935.0000000umho930.5600000
2/1/2012755.006845.0000000umho743.9000000
3/1/2012663.006784.3300000umho652.9500000
4/1/2012733.506771.6300000umho724.8200000
5/1/2012922.506801.8000000umho920.5800000
7/1/2012798.506774.5000000umho775.4400000
8/1/2012270.006677.5000000umho267.7200000
9/1/2012847.006714.3000000umho822.0700000
10/1/2012875.006742.6000000umho843.6800000
11/1/201210564.5062671.0000000umho4071.2900000
12/1/2012867.0062370.3300000umho856.2700000
1/1/2013761.0062364.0800000umho755.1700000
2/1/2013736.0062441.7500000umho728.7600000
3/1/2013712.83122419.3900000umho691.9400000
4/1/20133398.5062839.9700000umho2123.3800000
5/1/2013691.1191194.4100000umho689.5000000
6/1/2013525.5061137.4900000umho490.5300000
7/1/2013754.4491136.4000000umho702.2500000
8/1/2013707.5061131.6500000umho685.6400000
9/1/2013850.0061154.5100000umho811.7900000
10/1/2013797.006720.9300000umho757.1100000
11/1/2013552.003697.7400000umho548.6600000
12/1/2013812.506745.5700000umho796.4900000
1/1/2014826.008757.5000000umho781.3100000
2/1/2014855.508782.1700000umho818.3100000
3/1/2014466.508718.2500000umho441.5600000
4/1/20141307.008803.2500000umho1117.3900000
5/1/2014617.508814.1700000umho566.1700000
6/1/2014837.508818.3300000umho822.3600000
7/1/2014677.008793.5000000umho647.0900000
8/1/2014853.508793.1700000umho850.6700000
9/1/2014614.508817.8300000umho597.7500000
10/1/2014430.008671.6700000umho418.9200000
11/1/2014673.508681.0000000umho649.1400000
12/1/2014743.508665.3300000umho714.5400000
1/1/20156595.5061651.7500000umho2946.9800000
2/1/2015813.0061645.0000000umho800.8600000
3/1/2015230.0061580.9200000umho229.9800000
6/1/2015805.0062110.8800000umho789.3400000
10/1/201510636.5025720.7500000umho3175.2400000
11/1/2015704.0024048.5000000umho696.2800000

Temperature, water

Units: deg F Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

      
1/1/201165.82465.8200000deg F65.8200000
2/1/201170.86468.3400000deg F70.8000000
3/1/201173.80470.1600000deg F73.7000000
4/1/201178.10472.1500000deg F78.0500000
5/1/201178.63473.4400000deg F78.5500000
1/1/201268.30468.3000000deg F68.3000000
2/1/201267.80468.0500000deg F67.8000000
3/1/201271.99469.3600000deg F71.9800000
4/1/201269.39469.3700000deg F69.3900000
5/1/201279.77471.4500000deg F79.7600000
7/1/201280.80473.9500000deg F80.8000000
8/1/201282.10476.8100000deg F82.1000000
9/1/201277.95478.0000000deg F77.9400000
10/1/201274.82479.0900000deg F74.8200000
11/1/201267.96476.7300000deg F67.9500000
12/1/201268.95475.4300000deg F68.9400000
1/1/201369.64473.5700000deg F69.6400000
2/1/201367.99471.2200000deg F67.9900000
3/1/201360.451068.3000000deg F60.4400000
4/1/201374.75468.2900000deg F74.7400000
5/1/201375.98769.6300000deg F75.9700000
6/1/201380.34471.5300000deg F80.3300000
7/1/201381.86773.5600000deg F81.8600000
8/1/201381.38475.7900000deg F81.3800000
9/1/201380.76479.1800000deg F80.7600000
10/1/201371.80478.6900000deg F71.7900000
11/1/201371.44377.9300000deg F71.4300000
12/1/201368.26475.9200000deg F68.2300000
1/1/201458.02671.9400000deg F57.9800000
2/1/201470.20670.0800000deg F70.1900000
3/1/201469.82668.2600000deg F69.8200000
4/1/201476.49669.0400000deg F76.4800000
5/1/201478.29670.1800000deg F78.2900000
6/1/201480.77672.2700000deg F80.7700000
7/1/201482.56676.3600000deg F82.5500000
8/1/201470.37676.3800000deg F70.3600000
9/1/201479.78678.0400000deg F79.7800000
10/1/201479.01678.4600000deg F79.0100000
11/1/201463.46675.9900000deg F63.3900000
12/1/201465.03673.3700000deg F65.0200000
1/1/201566.76470.7400000deg F66.7400000
2/1/201570.06470.6800000deg F70.0600000
3/1/201573.64469.6600000deg F73.6400000
6/1/201582.24473.1800000deg F82.2400000
7/1/201581.17276.7800000deg F81.1700000
8/1/201584.39280.3600000deg F84.3900000
9/1/201581.11282.2300000deg F81.1100000
10/1/201577.17281.2200000deg F77.1700000
11/1/201570.82279.4800000deg F70.7500000

Turbidity

Units: NTU Year
2015
Historical
period of record
High 17.00 38.00
Mean 4.29 3.64 4.19511
Low 1.70 1.00
No. of Samples 48 521

Five-year Trend Graph

      
1/1/20113.5563.5500000NTU3.4700000
2/1/20112.4362.9900000NTU2.1300000
3/1/20113.5563.1800000NTU3.2800000
4/1/20113.1763.1800000NTU2.8200000
5/1/20114.0063.3400000NTU3.9400000
6/1/20112.7563.2400000NTU2.6900000
7/1/20112.9563.1400000NTU2.8500000
8/1/20112.9063.2200000NTU2.8900000
9/1/20112.7063.0800000NTU2.6800000
10/1/20117.5563.8100000NTU6.9500000
11/1/20113.6063.7400000NTU3.5500000
12/1/20111.8363.5900000NTU1.8200000
1/1/20121.9063.4100000NTU1.8000000
2/1/20122.3063.3100000NTU2.2900000
3/1/201214.0065.2000000NTU7.2100000
4/1/20124.1864.6400000NTU3.4000000
5/1/20127.1565.2300000NTU6.5600000
6/1/20124.0065.5900000NTU3.9900000
7/1/20122.8065.7400000NTU2.7300000
8/1/201211.0067.1900000NTU11.0000000
9/1/20124.5565.6100000NTU4.3700000
10/1/20124.3065.6300000NTU3.9500000
11/1/20129.6566.0500000NTU8.5100000
12/1/20125.0566.2300000NTU4.9400000
1/1/20132.3066.1400000NTU2.2900000
2/1/20136.1565.3300000NTU5.0200000
3/1/20132.1064.9300000NTU2.1000000
4/1/20133.1064.7300000NTU3.1000000
5/1/20133.2563.6600000NTU3.2300000
6/1/20132.7563.2800000NTU2.7500000
7/1/20134.1063.5800000NTU3.6800000
8/1/20133.4563.1300000NTU3.4500000
9/1/20134.4563.5200000NTU4.3900000
10/1/20133.8063.6300000NTU3.7800000
11/1/20135.8044.0600000NTU5.6300000
12/1/20136.7564.7300000NTU6.6500000
1/1/20142.2584.4200000NTU2.2400000
2/1/20143.2084.3800000NTU2.8300000
3/1/20144.9084.4500000NTU4.8700000
4/1/201419.4587.0600000NTU13.9500000
5/1/20143.3086.6400000NTU3.2800000
6/1/20144.2086.2200000NTU4.2000000
7/1/20144.2586.5500000NTU4.1400000
8/1/20142.1086.3700000NTU1.9800000
9/1/20147.5586.8100000NTU6.1000000
10/1/20144.7584.3600000NTU4.5800000
11/1/20142.7584.2700000NTU2.6900000
12/1/20144.9084.3800000NTU3.4300000
1/1/20154.2064.3800000NTU3.8800000
2/1/20154.5564.7800000NTU4.4500000
3/1/201516.0066.1900000NTU15.9700000
4/1/20155.0546.2400000NTU4.7400000
5/1/20154.8546.5900000NTU4.3500000
6/1/20153.9566.4300000NTU3.7500000
7/1/20152.7046.1800000NTU2.7000000
8/1/20153.3045.9800000NTU3.2900000
9/1/20152.0043.6400000NTU1.9800000
10/1/20153.9023.4500000NTU3.8400000
11/1/20152.8523.1200000NTU2.7200000
Other Measures of Creek Health

Water Chemistry Ratings - Tidal Portion of the Creek

As is the case for predominantly freshwater streams, total nitrogen, total phosphorus, and chlorophyll a levels are monitored carefully by water resource managers and used by regulatory authorities to determine whether a tidally-influenced stream meets the water quality standards mandated by the Clean Water Act. Shown below are water quality data for each saltwater water body within this basin. Florida law defines a threshold for the maximum allowable concentration of chlorophyll a and the minimum required concentration of dissolved oxygen in these streams. No thresholds have been established for the allowable concentration of nitrogen or phosphorus; trend information is provided for these nutrients, to determine whether a statistically significant trend exists and if so, whether levels are rising (bad) or falling (good). Learn more about these ratings and how they are calculated »

Data for the following WBIDs is averaged when compiling the data below:
  • 1951
  • 1953

Chlorophyll a

Units: mg/l Year
2015
Historical
period of record
High 0.1
Mean 0.0029 0.0094896
Low 0.0003
No. of Samples 0 157

Five-year Trend Graph

     
1/1/20111.9330.0019300mg/l0.0019300
2/1/20110.4030.0011700mg/l0.0004000
3/1/20115.4230.0025800mg/l0.0054200
4/1/201114.5030.0055600mg/l0.0145000
5/1/20110.5730.0045600mg/l0.0005700
6/1/20112.8930.0042900mg/l0.0028900
7/1/20111.4130.0042000mg/l0.0014100
8/1/20110.2530.0041700mg/l0.0002500
9/1/20111.4330.0035100mg/l0.0014300
10/1/20111.1130.0012800mg/l0.0011100
11/1/20111.5030.0014300mg/l0.0015000
12/1/20110.2530.0009900mg/l0.0002500
1/1/20121.0530.0009300mg/l0.0010500
2/1/20120.2530.0009300mg/l0.0002500
3/1/20123.1230.0012100mg/l0.0031200
4/1/20120.9330.0011800mg/l0.0009300
Target
mg/l
Threshold
0.011 mg/l

Nitrogen, Total

We were unable to determine a trend for the data available.
Units: mg/l Year
2015
Historical
period of record
High 1.9
Mean 0.8558 0.30103994
Low 0.34
No. of Samples 0 129

Five-year Trend Graph

     
1/1/2011744.0010.7440000mg/l0.7440000
2/1/20111205.0010.9745000mg/l1.2050000
3/1/20111012.0010.9870000mg/l1.0120000
4/1/20111029.0010.9975000mg/l1.0290000
5/1/2011978.0010.9936000mg/l0.9780000
6/1/20111461.0011.0715000mg/l1.4610000
7/1/20111031.0011.1193300mg/l1.0310000
8/1/2011910.0011.0701700mg/l0.9100000
9/1/2011976.0011.0641700mg/l0.9760000
10/1/2011653.0011.0015000mg/l0.6530000
11/1/2011648.0010.9465000mg/l0.6480000
12/1/2011648.0010.8110000mg/l0.6480000
1/1/2012734.0010.7615000mg/l0.7340000
2/1/2012758.0010.7361700mg/l0.7580000
3/1/2012719.0010.6933300mg/l0.7190000
4/1/2012621.0010.6880000mg/l0.6210000

Phosphorus, Total

We were unable to determine a trend for the data available.
Units: mg/l Year
2015
Historical
period of record
High 1.3
Mean 0.3484 0.2427637
Low 0.05
No. of Samples 0 197

Five-year Trend Graph

     
1/1/2011499.0030.4990000mg/l0.4990000
2/1/20111300.0030.8995000mg/l1.3000000
3/1/2011559.0030.7860000mg/l0.5590000
4/1/2011634.0030.7480000mg/l0.6340000
5/1/2011737.0030.7458000mg/l0.7370000
6/1/2011572.0030.7168300mg/l0.5720000
7/1/2011602.0030.7340000mg/l0.6020000
8/1/2011551.0030.6091700mg/l0.5510000
9/1/2011620.0030.6193300mg/l0.6200000
10/1/2011222.0030.5506700mg/l0.2220000
11/1/2011456.0030.5038300mg/l0.4560000
12/1/2011562.0030.5021700mg/l0.5620000
1/1/2012602.0030.5021700mg/l0.6020000
2/1/2012582.0030.5073300mg/l0.5820000
3/1/2012650.0030.5123300mg/l0.6500000
4/1/2012502.0030.5590000mg/l0.5020000
Target
mg/l
Threshold
mg/l

Dissolved Oxygen Saturation

Note: Low DO saturation also may be naturally influenced by inflows from nearby wetlands or groundwater sources
Units: percent (%) Year
2015
Historical
period of record
High 128.7
Mean 38.49 26.35312
Low 0.70
No. of Samples 0 293

Five-year Trend Graph

     
1/1/201169.33869.3300000percent (%)69.3300000
2/1/201157.41863.3700000percent (%)57.4100000
3/1/20114.01843.5800000percent (%)4.0100000
4/1/201155.64846.6000000percent (%)55.6400000
5/1/201137.10844.7000000percent (%)37.1000000
1/1/201214.70314.7000000percent (%)14.7000000
2/1/20129.70312.2000000percent (%)9.7000000
3/1/201284.30336.2300000percent (%)84.3000000
4/1/201248.80339.3800000percent (%)48.8000000
Target
percent (%)
Threshold
56.00 percent (%)

BOD, Biochemical oxygen demand

Units: mg/l Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

     
1/1/20111.0231.0200000mg/l1.0200000
2/1/20111.2331.1300000mg/l1.2300000
3/1/20112.2931.5100000mg/l2.2900000
4/1/20112.2631.7000000mg/l2.2600000
5/1/20110.5031.4600000mg/l0.5000000
6/1/20111.8731.5300000mg/l1.8700000
7/1/20111.0031.5300000mg/l1.0000000
8/1/20110.5331.4100000mg/l0.5300000
9/1/20110.9231.1800000mg/l0.9200000
10/1/20112.8031.2700000mg/l2.8000000
11/1/20110.5731.2800000mg/l0.5700000
12/1/20110.5831.0700000mg/l0.5800000
1/1/20120.6311.0100000mg/l0.6300000
2/1/20120.5031.0000000mg/l0.5000000
3/1/20122.1031.2000000mg/l2.1000000
4/1/20121.3130.9500000mg/l1.3100000

Color

Units: PCU Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

     

Enterococcus Group Bacteria

Units: cfu/100ml Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

     
Target
cfu/100ml
Threshold
cfu/100ml

Nitrogen, Ammonia + Ammonium as N

Units: ug/l Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

     
1/1/201139.00339.0000000ug/l39.0000000
2/1/201154.00346.5000000ug/l54.0000000
3/1/201183.00358.6700000ug/l83.0000000
4/1/2011110.00371.5000000ug/l110.0000000
5/1/201148.00366.8000000ug/l48.0000000
6/1/201146.00363.3300000ug/l46.0000000
7/1/201179.00370.0000000ug/l79.0000000
8/1/201182.00374.6700000ug/l82.0000000
9/1/2011163.00388.0000000ug/l163.0000000
10/1/201176.00382.3300000ug/l76.0000000
11/1/201198.00390.6700000ug/l98.0000000
12/1/201147.00390.8300000ug/l47.0000000
1/1/201269.00389.1700000ug/l69.0000000
2/1/201221.00379.0000000ug/l21.0000000
3/1/201227.00356.3300000ug/l27.0000000
4/1/201252.33352.3900000ug/l48.9000000

Nitrogen, Kjeldahl

Units: ug/l Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

     
1/1/2011337.003337.0000000ug/l337.0000000
2/1/2011835.003586.0000000ug/l835.0000000
3/1/2011805.003659.0000000ug/l805.0000000
4/1/2011761.003684.5000000ug/l761.0000000
5/1/2011402.003628.0000000ug/l402.0000000
6/1/20111200.003723.3300000ug/l1200.0000000
7/1/2011692.003782.5000000ug/l692.0000000
8/1/2011489.003724.8300000ug/l489.0000000
9/1/2011669.003702.1700000ug/l669.0000000
10/1/2011451.003650.5000000ug/l451.0000000
11/1/2011480.003663.5000000ug/l480.0000000
12/1/2011416.003532.8300000ug/l416.0000000
1/1/2012426.003488.5000000ug/l426.0000000
2/1/2012475.003486.1700000ug/l475.0000000
3/1/2012507.003459.1700000ug/l507.0000000
4/1/2012449.003458.8300000ug/l449.0000000

Nitrogen, Nitrite + Nitrate as N

Units: ug/l Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

     
1/1/2011407.003407.0000000ug/l407.0000000
2/1/2011370.003388.5000000ug/l370.0000000
3/1/2011207.003328.0000000ug/l207.0000000
4/1/2011268.003313.0000000ug/l268.0000000
5/1/2011576.003365.6000000ug/l576.0000000
6/1/2011261.003348.1700000ug/l261.0000000
7/1/2011339.003336.8300000ug/l339.0000000
8/1/2011421.003345.3300000ug/l421.0000000
9/1/2011307.003362.0000000ug/l307.0000000
10/1/2011202.003351.0000000ug/l202.0000000
11/1/2011168.003283.0000000ug/l168.0000000
12/1/2011232.003278.1700000ug/l232.0000000
1/1/2012308.003273.0000000ug/l308.0000000
2/1/2012283.003250.0000000ug/l283.0000000
3/1/2012212.003234.1700000ug/l212.0000000
4/1/2012172.003229.1700000ug/l172.0000000

Oysters

Units: Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

     
1/1/200654.07154.0700000%54.0700000
1/1/200765.56165.5600000%65.5600000
1/1/200862.62162.6200000%62.6200000
1/1/200967.37167.3700000%67.3700000
1/1/201067.42167.4200000%67.4200000
1/1/201170.40170.4000000%70.4000000
1/1/201367.59167.5900000%67.5900000
1/1/201471.04171.0400000%71.0400000
1/1/201563.84163.8400000%63.8400000

pH

Units: None Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

     
1/1/20117.6037.6000000None7.6000000
2/1/20116.4037.0000000None6.4000000
3/1/20117.1537.0500000None7.1500000
4/1/20116.9937.0400000None6.9900000
5/1/20117.5737.1400000None7.5700000
1/1/20126.8936.8900000None6.8900000
2/1/20126.3836.6400000None6.3800000
3/1/20127.4936.9200000None7.4900000
4/1/20126.7836.8900000None6.7800000

Rainfall

Units: inches Year
2015
Historical
period of record
High 40.6 53.7
Mean 14.1246563970007
Low 7.69
No. of Samples 365 5,270

Five-year Trend Graph

     
1/1/20113.22313.2200000inches3.2200000
2/1/20110.81280.8100000inches0.8100000
3/1/20116.28316.2800000inches6.2800000
4/1/20111.17301.1700000inches1.1700000
5/1/20112.00312.0000000inches2.0000000
6/1/20112.71302.7100000inches2.7100000
7/1/20117.65317.6500000inches7.6500000
8/1/20117.92317.9200000inches7.9200000
9/1/20115.26305.2600000inches5.2600000
10/1/20111.80311.8000000inches1.8000000
11/1/20110.95300.9500000inches0.9500000
12/1/20110.25300.2500000inches0.2500000
1/1/20120.31290.3100000inches0.3100000
2/1/20120.62290.6200000inches0.6200000
3/1/20121.72311.7200000inches1.7200000
4/1/20122.59242.5900000inches2.5900000
5/1/20121.20311.2000000inches1.2000000
6/1/201216.373016.3700000inches16.3700000
7/1/20123.13313.1300000inches3.1300000
8/1/20125.55315.5500000inches5.5500000
9/1/20122.57302.5700000inches2.5700000
10/1/20123.90313.9000000inches3.9000000
11/1/20120.01280.0100000inches0.0100000
12/1/20121.21311.2100000inches1.2100000
1/1/20130.19310.1900000inches0.1900000
2/1/20131.07231.0700000inches1.0700000
3/1/20131.38311.3800000inches1.3800000
4/1/20133.54303.5400000inches3.5400000
5/1/20133.07313.0700000inches3.0700000
6/1/201311.733011.7300000inches11.7300000
7/1/20137.96317.9600000inches7.9600000
8/1/201311.863111.8600000inches11.8600000
9/1/201310.963010.9600000inches10.9600000
10/1/20131.26311.2600000inches1.2600000
11/1/20130.58300.5800000inches0.5800000
12/1/20130.07310.0700000inches0.0700000
1/1/20142.29312.2900000inches2.2900000
2/1/20143.09283.0900000inches3.0900000
3/1/20144.87314.8700000inches4.8700000
4/1/20141.40291.4000000inches1.4000000
5/1/20145.78315.7800000inches5.7800000
6/1/20143.18303.1800000inches3.1800000
7/1/20144.32314.3200000inches4.3200000
8/1/20141.51281.5100000inches1.5100000
9/1/20146.61256.6100000inches6.6100000
10/1/20142.09292.0900000inches2.0900000
11/1/20142.69302.6900000inches2.6900000
12/1/20140.34310.3400000inches0.3400000
1/1/20151.52311.5200000inches1.5200000
2/1/20153.29283.2900000inches3.2900000
3/1/20150.87310.8700000inches0.8700000
4/1/20151.06301.0600000inches1.0600000
5/1/20152.77312.7700000inches2.7700000
6/1/20155.62305.6200000inches5.6200000
7/1/20158.99318.9900000inches8.9900000
8/1/20155.48315.4800000inches5.4800000
9/1/20156.00306.0000000inches6.0000000
10/1/20152.70312.7000000inches2.7000000
11/1/20150.54300.5400000inches0.5400000
12/1/20151.74311.7400000inches1.7400000
Target
inches
Threshold
inches

Salinity

Units: PSS Year
2015
Historical
period of record
High 34.7
Mean 17.52 10.05493
Low 0.35
No. of Samples 0 216

Five-year Trend Graph

     
1/1/20110.6330.6300000PSS0.6300000
2/1/20111.4531.0400000PSS1.4500000
3/1/201114.7835.6200000PSS14.7800000
4/1/201110.0236.7200000PSS10.0200000
5/1/20111.1335.6000000PSS1.1300000
1/1/201224.88324.8800000PSS24.8800000
2/1/201215.68320.2800000PSS15.6800000
3/1/20120.52313.6900000PSS0.5200000
4/1/201219.98315.2700000PSS19.9800000

Specific conductance

Units: umho Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

     
1/1/20111252.0031252.0000000umho1252.0000000
2/1/20112784.0032018.0000000umho2784.0000000
3/1/201124309.0039448.3300000umho24309.0000000
4/1/201117049.00311348.5000000umho17049.0000000
5/1/20112217.0039522.2000000umho2217.0000000
1/1/201239018.00339018.0000000umho39018.0000000
2/1/201225656.00332337.0000000umho25656.0000000
3/1/20121051.00321908.3300000umho1051.0000000
4/1/201232041.00324441.5000000umho32041.0000000

Temperature, water

Units: deg F Year
2015
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

     
1/1/201168.04268.0400000deg F68.0400000
2/1/201170.63269.3400000deg F70.6300000
3/1/201172.10270.2600000deg F72.1000000
4/1/201177.34272.0300000deg F77.3400000
5/1/201177.86273.1900000deg F77.8600000
1/1/201271.01271.0100000deg F71.0100000
2/1/201271.33271.1700000deg F71.3300000
3/1/201273.20271.8500000deg F73.2000000
4/1/201275.27272.7000000deg F75.2700000

Turbidity

Units: NTU Year
2015
Historical
period of record
High 42.0
Mean 4.71 4.37313
Low 0.27
No. of Samples 0 260

Five-year Trend Graph

     
1/1/20115.1035.1000000NTU5.1000000
2/1/20115.0035.0500000NTU5.0000000
3/1/20114.3034.8000000NTU4.3000000
4/1/20118.5035.7300000NTU8.5000000
5/1/20112.1035.0000000NTU2.1000000
6/1/20113.8034.8000000NTU3.8000000
7/1/20114.0034.6200000NTU4.0000000
8/1/20112.6034.2200000NTU2.6000000
9/1/20113.3034.0500000NTU3.3000000
10/1/20117.1033.8200000NTU7.1000000
11/1/20113.8034.1000000NTU3.8000000
12/1/20112.4033.8700000NTU2.4000000
1/1/20122.3033.5800000NTU2.3000000
2/1/20122.5033.5700000NTU2.5000000
3/1/20127.0034.1800000NTU7.0000000
4/1/20124.2033.7000000NTU4.2000000
Other Measures of Creek Health

Oysters

Because they are immobile and will tolerate a fairly wide salinity range, eastern oysters (Crassostrea virginica) are valuable as an indicator of the relative health of aquatic ecosystems in the tidally-influenced portions of coastal creeks. Sarasota County has established an oyster monitoring program to track the location, types, and status of oyster reefs. Data from this monitoring program is shown below. Learn more about Oysters »

Loading oyster site map...
Most Recent Sarasota County Oyster Monitoring Program Data
Icon Site ID Year Dead Live Total % Live
1 HUD2 2015 132 233 365 63

Impervious Features

Hudson Bayou is located within the Sarasota Bay Watershed. View details about the Sarasota Bay Watershed »

Rain that falls on land that is in a natural state is absorbed and filtered by soils and vegetation as it makes it way into underground aquifers. However, in developed areas, "impervious surfaces" impede this process and contribute to polluted urban runoff entering surface waters. These surfaces include human infrastructure like roads, sidewalks, driveways and parking lots that are covered by impenetrable materials such as asphalt, concrete, brick and stone, as well as buildings and other permanent structures. Soils that have been disturbed and compacted by urban development are often impervious as well. Learn more about Impervious Features »

The Sarasota County Stormwater Environmental Utility (SEU) mapped impervious surfaces in the County in 2013. A map showing impervious surfaces can be viewed using the Water Atlas Map Viewer tool.

of the land area within the Hudson Bayou Basin is covered by impervious surfaces.

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Land Use / Land Cover

Hudson Bayou is located within the Sarasota Bay Watershed. View details about the Sarasota Bay Watershed »

Land use within a creek's watershed has a major effect on its water quality. In general, less development means better water quality. Land Cover/Land Use classifications categorize land in terms of its observed physical surface characteristics (e.g. upland or wetland), and also reflect the types of activity that are taking place on it (agriculture, urban/built-up, utilities, etc.). Florida uses as its standard a set of statewide classifications which were developed by the Florida Department of Transportation. Learn more about Land Use and Land Cover »

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Data Sources

The data sources listed below provided water quality data used to create the report on this page. Not all data sources provided data for every creek, and not every Creek Conditions Report used data from all listed data sources. While some data sources have no data for the scored year, they provided period-of-record (historical high, mean, low) data. Click on a data source name to review its metadata.