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Hudson Bayou Condition Report for 2017

View 2016 Report

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
2017
Historical
period of record
High 0.102 0.1568
Mean 0.0022 0.0013 0.01314887
Low 0.0003 0.0002
No. of Samples 24 553

Five-year Rolling Average Graph

      
1/1/20131.7760.0017700mg/l0.0014900
2/1/20136.3460.0040600mg/l0.0030500
3/1/20131.1860.0031000mg/l0.0010200
4/1/20132.2460.0028800mg/l0.0021400
5/1/20133.2160.0029500mg/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
1/1/20160.2540.0096800mg/l0.0002500
2/1/20160.7820.0096400mg/l0.0007600
3/1/20160.3920.0095200mg/l0.0003900
4/1/20161.5420.0006700mg/l0.0014100
5/1/20161.1020.0008100mg/l0.0010800
6/1/20160.7320.0008000mg/l0.0007100
7/1/20160.7520.0008800mg/l0.0007000
8/1/20160.9720.0009100mg/l0.0008900
9/1/20160.3230.0009000mg/l0.0003100
10/1/20161.2920.0008600mg/l0.0008100
11/1/20160.8520.0008200mg/l0.0006000
12/1/20161.6120.0009700mg/l0.0009800
1/1/20175.4620.0017500mg/l0.0031400
2/1/20171.7720.0018800mg/l0.0011600
3/1/20170.8220.0019700mg/l0.0008000
4/1/201718.0820.0047700mg/l0.0087300
5/1/201753.5320.0135500mg/l0.0227200
6/1/20173.7120.0139000mg/l0.0029200
7/1/20172.2520.0133600mg/l0.0018500
8/1/20174.9520.0138900mg/l0.0026900
9/1/20171.0420.0139300mg/l0.0010400
10/1/20171.5420.0111700mg/l0.0015300
11/1/20170.6520.0023600mg/l0.0006500
12/1/20172.7320.0021900mg/l0.0013000
Target
mg/l
Threshold
0.02 mg/l
Pass

Nitrogen, Total

Score: Pass
Units: mg/l Year
2017
Historical
period of record
High 3.575 3.575
Mean 1.1705 0.9253 0.41542713
Low 0.666 0.054
No. of Samples 24 274

Five-year Rolling Average Graph

      
1/1/2013741.0020.7410000mg/l0.7293300
2/1/2013980.0020.8605000mg/l0.9556700
3/1/2013658.5020.7931700mg/l0.6533100
4/1/2013174.0020.6383800mg/l0.1260000
5/1/20131111.5020.7330000mg/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
1/1/20161004.5021.0045000mg/l0.9998500
2/1/2016958.5020.9815000mg/l0.9545000
3/1/2016938.0010.9670000mg/l0.9380000
5/1/20161188.5021.0223800mg/l1.1719800
6/1/20161468.5021.1116000mg/l1.4618600
7/1/20161320.0021.1747000mg/l1.3193900
8/1/20161581.5021.2993000mg/l1.5814900
9/1/20161845.0021.4807000mg/l1.8438500
10/1/20161347.5021.4585000mg/l1.3474800
11/1/20161207.0011.4615800mg/l1.2070000
12/1/20161160.0011.4101700mg/l1.1600000
1/1/20171447.5021.4314200mg/l1.3544900
2/1/20171168.5021.3625800mg/l1.1193000
3/1/20171231.0021.2602500mg/l1.2217000
4/1/20171229.0021.2405000mg/l1.1513200
5/1/20172335.0021.4285000mg/l1.9785400
6/1/20171082.5021.4155800mg/l1.0817400
7/1/20171110.0021.3593300mg/l1.0936200
8/1/20171012.5021.3333300mg/l1.0124600
9/1/20171300.0021.3448300mg/l1.2996500
10/1/20171115.5021.3259200mg/l1.1154100
11/1/2017870.5021.0818300mg/l0.8461400
12/1/20171068.0021.0794200mg/l1.0672100
Pass

Phosphorus, Total

Score: Pass
Units: mg/l Year
2017
Historical
period of record
High 1.70 4.05
Mean 0.4797 0.4574 0.38312997
Low 0.095 0.095
No. of Samples 24 571

Five-year Rolling Average Graph

      
1/1/2013487.5060.4875000mg/l0.4246100
2/1/2013913.0060.7002500mg/l0.7156000
3/1/2013669.0060.6898300mg/l0.5912600
4/1/2013635.5060.6762500mg/l0.5657300
5/1/2013958.5060.7327000mg/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
1/1/2016275.0040.4082000mg/l0.2529100
2/1/2016317.5020.3764000mg/l0.2576700
3/1/2016537.0020.4011000mg/l0.4861900
4/1/2016507.5020.4259000mg/l0.4500700
5/1/2016520.0020.4314000mg/l0.4944500
6/1/2016480.0020.4395000mg/l0.4650200
7/1/2016570.0020.4886700mg/l0.5202000
8/1/2016363.0020.4962500mg/l0.3503500
9/1/2016384.0020.4707500mg/l0.3723200
10/1/2016498.0020.4691700mg/l0.4422300
11/1/2016242.0010.4228300mg/l0.2420000
12/1/2016393.5020.4084200mg/l0.3790900
1/1/2017897.5020.4630000mg/l0.5828400
2/1/2017924.0020.5565000mg/l0.7596700
3/1/2017724.0020.6131700mg/l0.5703200
4/1/2017815.0020.6660000mg/l0.6693300
5/1/20171044.5020.7997500mg/l0.8132000
6/1/2017514.5020.8199200mg/l0.4746700
7/1/2017504.5020.7544200mg/l0.4571000
8/1/2017547.0020.6915800mg/l0.4958300
9/1/2017383.0020.6347500mg/l0.3790300
10/1/2017314.0020.5512500mg/l0.2707700
11/1/2017355.5020.4364200mg/l0.2419100
12/1/2017458.0020.4270000mg/l0.4044000
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
2017
Historical
period of record
High 102.70 860.00
Mean 45.04 52.73 44.694
Low 3.31 3.31
No. of Samples 24 608

Five-year Rolling Average Graph

      
1/1/201396.40696.4000000percent (%)96.2800000
2/1/201328.60662.5000000percent (%)22.7700000
3/1/201366.691263.9000000percent (%)64.1400000
4/1/201330.15655.4600000percent (%)24.7300000
5/1/201341.52952.6700000percent (%)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
1/1/201686.48466.4400000percent (%)85.3500000
2/1/201686.80270.6400000percent (%)85.2700000
3/1/201650.40264.3600000percent (%)44.6900000
4/1/2016450.452143.5800000percent (%)187.5500000
5/1/201656.052146.0400000percent (%)42.2300000
6/1/201662.952132.1900000percent (%)59.9000000
7/1/201657.102127.2900000percent (%)53.2900000
8/1/201662.252123.2000000percent (%)60.9700000
9/1/201645.902122.4500000percent (%)45.8400000
10/1/201686.45261.7800000percent (%)86.4000000
11/1/201652.90261.2600000percent (%)43.8400000
12/1/201647.75258.7300000percent (%)29.3700000
1/1/201754.85258.3500000percent (%)45.7500000
2/1/201741.95254.9700000percent (%)27.0700000
3/1/201741.50254.2300000percent (%)23.5100000
4/1/201737.91246.1400000percent (%)15.4900000
5/1/201744.40244.7300000percent (%)42.4800000
6/1/201793.80252.4000000percent (%)93.3800000
7/1/201757.55252.8500000percent (%)53.8300000
8/1/201756.50255.2800000percent (%)51.0100000
9/1/201766.65259.4700000percent (%)66.4100000
10/1/201744.30260.5300000percent (%)44.2500000
11/1/201769.55264.7300000percent (%)69.2000000
12/1/201770.00260.7600000percent (%)69.7600000
Target
percent (%)
Threshold
38.00 percent (%)

BOD, Biochemical oxygen demand

Units: mg/l Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

      
1/1/20130.6960.6900000mg/l0.6600000
2/1/20134.0462.3700000mg/l1.9900000
3/1/20130.6361.7900000mg/l0.6100000
4/1/20130.9761.5800000mg/l0.8500000
5/1/20133.0761.8800000mg/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
1/1/20160.5040.8200000mg/l0.5000000
2/1/20160.6120.8200000mg/l0.6100000
3/1/20161.0920.9200000mg/l0.9700000
4/1/20160.6020.6900000mg/l0.5900000
5/1/20160.6320.6900000mg/l0.6100000
6/1/20161.0020.7400000mg/l1.0000000
7/1/20161.0720.8300000mg/l1.0700000
8/1/20161.0020.9000000mg/l1.0000000
9/1/20161.0020.8800000mg/l1.0000000
10/1/20161.0220.9500000mg/l1.0100000
11/1/20161.0021.0200000mg/l1.0000000
12/1/20161.0021.0200000mg/l1.0000000
1/1/20174.7721.6300000mg/l4.5900000
2/1/20171.7721.7600000mg/l1.6300000
3/1/20171.0021.7600000mg/l1.0000000
4/1/20172.2821.9700000mg/l1.8900000
5/1/20174.7622.6000000mg/l2.9200000
6/1/20171.0022.6000000mg/l1.0000000
7/1/20171.0021.9700000mg/l1.0000000
8/1/20171.0021.8400000mg/l1.0000000
9/1/20171.0021.8400000mg/l1.0000000
10/1/20171.2421.6700000mg/l1.2400000
11/1/20171.0021.0400000mg/l1.0000000
12/1/20171.0021.0400000mg/l1.0000000

Color

Units: PCU Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

      
2/1/201665.00265.0000000PCU64.8100000
3/1/201675.00270.0000000PCU74.8300000
4/1/201665.00268.3300000PCU65.0000000
5/1/201675.00270.0000000PCU74.8300000
6/1/201680.00272.0000000PCU80.0000000
7/1/201685.00274.1700000PCU84.8500000
8/1/2016100.00280.0000000PCU99.5000000
9/1/2016100.00284.1700000PCU97.9800000
10/1/201680.00286.6700000PCU77.4600000
11/1/201670.00285.8300000PCU67.0800000
12/1/201670.00284.1700000PCU67.0800000
1/1/201785.00284.1700000PCU84.8500000
2/1/201790.00282.5000000PCU89.4400000
3/1/201762.50276.2500000PCU62.0500000
4/1/201772.50275.0000000PCU72.1100000
5/1/2017127.50284.5800000PCU104.8800000
6/1/2017130.00294.5800000PCU126.4900000
7/1/2017110.00298.7500000PCU109.5400000
8/1/201795.00299.5800000PCU93.8100000
9/1/201787.502103.7500000PCU86.6000000
10/1/2017110.002110.0000000PCU110.0000000
11/1/201782.502102.5000000PCU80.6200000
12/1/201780.00294.1700000PCU77.4600000

Escherichia coli

Units: cfu/100ml Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average 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
1/1/20161789.504794.3000000cfu/100ml1775.3600000
2/1/2016688.502837.0000000cfu/100ml588.4100000
3/1/20161100.502947.9000000cfu/100ml977.0100000
4/1/2016262.502866.5000000cfu/100ml247.4900000
5/1/2016584.002885.0000000cfu/100ml487.2100000
6/1/20161172.002932.8300000cfu/100ml1100.1700000
7/1/20163937.0021290.7500000cfu/100ml1154.2400000
8/1/20161236.0021382.0000000cfu/100ml1136.0100000
9/1/20161626.0021469.5800000cfu/100ml1383.0600000
10/1/20165180.5022289.2500000cfu/100ml5012.7900000
11/1/2016794.5022324.3300000cfu/100ml423.0500000
12/1/20161079.5022308.9200000cfu/100ml630.1300000
1/1/201710462.0013396.4200000cfu/100ml10462.0000000
2/1/20171077.5023370.0000000cfu/100ml1067.6300000
3/1/2017379.5023162.2500000cfu/100ml365.6700000
4/1/2017574.5022394.5800000cfu/100ml261.5700000
5/1/20173198.0022795.1700000cfu/100ml1867.6200000
6/1/20171841.5022922.1700000cfu/100ml1788.0400000
7/1/20172359.0021571.6700000cfu/100ml2359.0000000
8/1/20171526.5021646.5000000cfu/100ml1396.4700000
9/1/20171592.0021848.5800000cfu/100ml1570.9600000
10/1/20174693.0022535.0000000cfu/100ml4467.2600000
11/1/20171891.0022317.1700000cfu/100ml1747.7400000
12/1/20171668.5022288.3300000cfu/100ml1115.8200000
Target
cfu/100ml
Threshold
cfu/100ml

Nitrogen, Ammonia + Ammonium as N

Units: ug/l Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

      
1/1/201354.50654.5000000ug/l38.5700000
2/1/201387.50671.0000000ug/l87.3300000
3/1/2013125.50689.1700000ug/l61.3200000
4/1/2013172.006109.8800000ug/l72.4400000
5/1/2013150.506118.0000000ug/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
1/1/201654.00282.3000000ug/l52.1500000
2/1/201643.00260.6000000ug/l41.2900000
3/1/201616.00151.0000000ug/l16.0000000
4/1/2016112.00159.0000000ug/l112.0000000
5/1/2016120.50269.1000000ug/l118.7400000
7/1/2016167.50291.8000000ug/l141.5800000
8/1/2016153.001113.8000000ug/l153.0000000
9/1/2016125.002135.6000000ug/l124.8600000
10/1/2016137.001140.6000000ug/l137.0000000
11/1/2016126.001141.7000000ug/l126.0000000
12/1/2016168.002146.0800000ug/l156.1400000
1/1/2017304.502168.9200000ug/l229.1700000
2/1/2017165.001170.9200000ug/l165.0000000
3/1/2017255.001192.5800000ug/l255.0000000
4/1/201783.502183.6700000ug/l57.5500000
5/1/2017101.001179.5000000ug/l101.0000000
6/1/2017139.002174.6700000ug/l138.7100000
7/1/2017171.002152.4200000ug/l164.9700000
10/1/201731.001110.5000000ug/l31.0000000
11/1/201762.001100.7500000ug/l62.0000000
12/1/2017125.00297.2500000ug/l124.7400000

Nitrogen, Kjeldahl

Units: ug/l Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

      
1/1/2013474.006474.0000000ug/l469.7900000
2/1/2013849.006661.5000000ug/l777.5100000
3/1/2013500.506607.8300000ug/l445.8100000
4/1/201392.506479.0000000ug/l82.1600000
5/1/20131064.506596.1000000ug/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
1/1/2016709.004896.0000000ug/l708.8800000
2/1/2016724.002847.1000000ug/l724.0000000
3/1/2016731.002847.7000000ug/l730.9800000
4/1/2016669.502710.6000000ug/l662.8000000
5/1/20161022.002771.1000000ug/l1020.3500000
6/1/20161240.002849.2500000ug/l1229.6300000
7/1/20161235.002936.9200000ug/l1234.5000000
8/1/20161325.0021037.0800000ug/l1324.5400000
9/1/20161440.0021155.2500000ug/l1438.7500000
10/1/20161013.5021212.5800000ug/l1010.6100000
11/1/2016859.0021185.4200000ug/l857.7700000
12/1/2016994.5021144.5000000ug/l988.8900000
1/1/20171363.5021165.9200000ug/l1249.1900000
2/1/20171110.0021130.0800000ug/l1039.2300000
3/1/20171086.0021071.0800000ug/l1058.2300000
4/1/20171156.0021094.8300000ug/l1045.1300000
5/1/20172230.5021323.4200000ug/l1790.9700000
6/1/2017871.0021302.8300000ug/l871.0000000
7/1/20171038.0021248.5800000ug/l1030.8100000
8/1/2017773.0021192.4200000ug/l772.4200000
9/1/2017956.0021170.7500000ug/l955.9700000
10/1/2017940.5021134.8300000ug/l940.2300000
11/1/2017631.002868.2500000ug/l631.0000000
12/1/2017815.502859.0000000ug/l810.6800000

Nitrogen, Nitrite + Nitrate as N

Units: ug/l Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

      
1/1/2013267.006267.0000000ug/l183.4500000
2/1/2013131.006199.0000000ug/l42.2500000
3/1/2013158.006185.3300000ug/l62.7600000
4/1/201381.506159.3800000ug/l25.2200000
5/1/201347.006136.9000000ug/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
1/1/2016295.504253.1000000ug/l274.4600000
2/1/2016234.502259.4000000ug/l218.3600000
3/1/2016202.001247.5000000ug/l202.0000000
5/1/2016166.502224.6300000ug/l90.9000000
6/1/2016228.502225.4000000ug/l227.5800000
7/1/201685.002183.3000000ug/l40.0000000
8/1/2016256.502187.7000000ug/l254.8000000
9/1/2016404.002228.1000000ug/l403.9400000
10/1/2016334.002245.7500000ug/l323.5200000
11/1/2016394.001283.6700000ug/l394.0000000
12/1/2016271.001290.7500000ug/l271.0000000
1/1/2017120.001296.5800000ug/l120.0000000
2/1/2017113.001272.6700000ug/l113.0000000
3/1/2017238.001245.0000000ug/l238.0000000
4/1/2017137.001212.1700000ug/l137.0000000
5/1/2017194.001178.8300000ug/l194.0000000
6/1/2017211.502168.9200000ug/l207.3900000
7/1/2017140.001172.2500000ug/l140.0000000
8/1/2017239.502193.3300000ug/l238.6200000
9/1/2017344.002211.0000000ug/l343.3000000
10/1/2017175.002217.3300000ug/l174.8200000
11/1/2017442.001258.6700000ug/l442.0000000
12/1/2017252.502265.5000000ug/l247.9900000

pH

Units: None Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

      
1/1/20137.4967.4900000None7.4900000
2/1/20137.0067.2500000None6.9900000
3/1/20137.28127.2600000None7.2800000
4/1/20137.1167.2200000None7.1100000
5/1/20137.2197.2200000None7.2100000
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
1/1/20167.5587.3200000None7.5500000
2/1/20167.4147.3600000None7.4100000
3/1/20167.3147.3500000None7.3100000
4/1/20167.3547.3600000None7.3400000
5/1/20167.3347.3900000None7.3300000
6/1/20167.3347.3800000None7.3300000
7/1/20167.2847.3400000None7.2800000
8/1/20167.2647.3100000None7.2500000
9/1/20167.3547.3200000None7.3400000
10/1/20167.4247.3300000None7.4200000
11/1/20167.3947.3400000None7.3900000
12/1/20167.2947.3300000None7.2900000
1/1/20177.1847.3200000None7.1800000
2/1/20177.2847.3200000None7.2800000
3/1/20177.4147.3300000None7.4000000
4/1/20177.1847.2900000None7.1700000
5/1/20177.2347.2600000None7.2200000
6/1/20177.3547.2700000None7.3500000
7/1/20177.3747.3000000None7.3700000
8/1/20177.4447.3300000None7.4400000
9/1/20177.3847.3300000None7.3800000
10/1/20177.3527.3500000None7.3500000
11/1/20177.4347.3900000None7.4300000
12/1/20177.4947.4100000None7.4800000

Salinity

Units: PSS Year
2017
Historical
period of record
High 25.36 25.36
Mean 0.47 0.38 1.97661
Low 0.17 0.04
No. of Samples 24 478

Five-year Rolling Average Graph

      
1/1/20130.3760.3700000PSS0.3700000
2/1/20130.3660.3700000PSS0.3600000
3/1/20130.4260.3800000PSS0.4200000
4/1/20131.8360.7500000PSS1.0900000
5/1/20130.3460.6600000PSS0.3400000
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
1/1/20160.3941.5400000PSS0.3700000
2/1/20160.3821.5500000PSS0.3600000
3/1/20160.2421.5400000PSS0.2400000
4/1/20160.4710.3700000PSS0.4700000
5/1/20160.3320.3600000PSS0.3300000
6/1/20160.3920.3700000PSS0.3700000
7/1/20160.3120.3500000PSS0.3000000
8/1/20160.3120.3400000PSS0.2700000
9/1/20160.3320.3600000PSS0.2900000
10/1/20160.4120.3500000PSS0.3900000
11/1/20169.1221.8100000PSS2.2400000
12/1/20167.0222.9200000PSS1.3400000
1/1/20170.9823.0300000PSS0.5500000
2/1/20170.3723.0400000PSS0.3500000
3/1/20170.4423.0600000PSS0.4100000
4/1/201712.8325.1300000PSS2.7600000
5/1/20170.8423.7500000PSS0.7100000
6/1/20170.4022.6400000PSS0.3900000
7/1/20170.3322.5400000PSS0.3100000
8/1/20170.4422.5500000PSS0.4100000
9/1/20170.3922.5400000PSS0.3800000
10/1/20170.3020.4500000PSS0.2900000
11/1/20170.4020.3800000PSS0.3800000
12/1/20170.3920.3800000PSS0.3800000

Specific conductance

Units: umho Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

      
1/1/2013761.006761.0000000umho755.1700000
2/1/2013736.006748.5000000umho728.7600000
3/1/2013712.8312736.6100000umho691.9400000
4/1/20133398.5061402.0800000umho2123.3800000
5/1/2013691.1191259.8900000umho689.5000000
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
1/1/2016782.7544041.0800000umho747.0300000
2/1/2016762.0023221.3100000umho727.7100000
3/1/2016493.5022675.7500000umho493.0300000
4/1/2016553.502659.1500000umho373.4800000
5/1/2016684.502655.2500000umho683.5300000
6/1/2016793.502678.2900000umho765.3400000
7/1/2016644.002655.1700000umho619.2000000
8/1/2016642.002635.1700000umho565.4600000
9/1/2016673.002665.0800000umho610.1400000
10/1/2016831.002711.3300000umho798.5400000
11/1/201614802.0023064.2500000umho4102.9200000
12/1/201611644.5024872.7500000umho2488.4500000
1/1/20171900.0025082.0800000umho1114.2200000
2/1/2017747.0025099.5800000umho714.7900000
3/1/2017876.5025133.5000000umho834.6800000
4/1/201718656.0028104.3300000umho4765.8100000
5/1/20171619.5025907.2500000umho1387.3400000
6/1/2017821.0024103.3300000umho794.9900000
7/1/2017669.0023898.1700000umho641.4500000
8/1/2017878.5023920.0800000umho825.1400000
9/1/2017788.0023905.3300000umho767.8600000
11/1/2017803.002791.9000000umho776.9200000
12/1/2017803.002788.3000000umho776.9200000

Temperature, water

Units: deg F Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

      
1/1/201369.64469.6400000deg F69.6400000
2/1/201367.99468.8200000deg F67.9900000
3/1/201360.451066.0300000deg F60.4400000
4/1/201374.75468.2100000deg F74.7400000
5/1/201375.98769.7600000deg 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
1/1/201661.02274.9000000deg F60.9500000
2/1/201669.47271.9200000deg F69.4600000
3/1/201667.38269.1700000deg F67.3600000
4/1/201675.95268.9300000deg F75.9500000
5/1/201677.23270.2100000deg F77.2300000
6/1/201681.10272.0300000deg F81.1000000
7/1/201681.79275.4900000deg F81.7900000
8/1/201682.51277.6600000deg F82.5000000
9/1/201681.10279.9500000deg F81.0900000
10/1/201672.28279.3400000deg F72.2800000
11/1/201667.82277.7700000deg F67.7400000
12/1/201674.85276.7300000deg F74.8400000
1/1/201768.77274.5600000deg F68.7700000
2/1/201769.89272.4500000deg F69.8700000
3/1/201765.23269.8100000deg F65.2000000
4/1/201776.19270.4600000deg F76.1800000
5/1/201779.40272.3900000deg F79.4000000
6/1/201781.01273.4200000deg F81.0000000
7/1/201782.76275.7500000deg F82.7600000
8/1/201782.67277.8800000deg F82.6700000
9/1/201781.50280.5900000deg F81.5000000
11/1/201773.40280.2700000deg F73.4000000
12/1/201773.40278.7500000deg F73.4000000

Turbidity

Units: NTU Year
2017
Historical
period of record
High 11.00 38.00
Mean 5.05 3.68 4.07316
Low 1.90 1.00
No. of Samples 20 568

Five-year Rolling Average Graph

      
1/1/20132.3062.3000000NTU2.2900000
2/1/20136.1564.2300000NTU5.0200000
3/1/20132.1063.5200000NTU2.1000000
4/1/20133.1063.4100000NTU3.1000000
5/1/20133.2563.3800000NTU3.2300000
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
1/1/20162.6542.9400000NTU2.5400000
2/1/20162.7022.8200000NTU2.5500000
3/1/20161.6522.7500000NTU1.5900000
4/1/20163.6522.7000000NTU3.2600000
5/1/20163.1022.7500000NTU2.7700000
6/1/20162.9522.7800000NTU2.7900000
7/1/20163.7522.9700000NTU3.7400000
8/1/20164.9023.3300000NTU4.8600000
9/1/20164.9033.8800000NTU4.7800000
10/1/20168.5024.6800000NTU8.5000000
11/1/20164.7324.9600000NTU4.2900000
12/1/20166.0025.4600000NTU4.8700000
1/1/20176.3025.8900000NTU6.1600000
2/1/20175.2525.9500000NTU4.8300000
3/1/20173.6525.7400000NTU3.2000000
4/1/20175.9525.3100000NTU5.1700000
5/1/20177.4025.7600000NTU6.4700000
6/1/20175.6525.7000000NTU5.5100000
7/1/20175.4025.5500000NTU5.3700000
8/1/20175.3525.5700000NTU5.3500000
9/1/20176.8026.0900000NTU6.7300000
10/1/20173.3025.6500000NTU3.2000000
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
2017
Historical
period of record
High 0.1
Mean 0.0029 0.0094896
Low 0.0003
No. of Samples 0 157

Five-year Rolling Average Graph

     
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
2017
Historical
period of record
High 1.9
Mean 0.8558 0.30103994
Low 0.34
No. of Samples 0 129

Five-year Rolling Average Graph

     

Phosphorus, Total

We were unable to determine a trend for the data available.
Units: mg/l Year
2017
Historical
period of record
High 1.3
Mean 0.3484 0.2427637
Low 0.05
No. of Samples 0 197

Five-year Rolling Average Graph

     
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
2017
Historical
period of record
High 128.7
Mean 38.49 26.35312
Low 0.70
No. of Samples 0 293

Five-year Rolling Average Graph

     
Target
percent (%)
Threshold
56.00 percent (%)

BOD, Biochemical oxygen demand

Units: mg/l Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

     

Color

Units: PCU Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

     

Enterococcus Group Bacteria

Units: cfu/100ml Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

     
Target
cfu/100ml
Threshold
cfu/100ml

Nitrogen, Ammonia + Ammonium as N

Units: ug/l Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

     

Nitrogen, Kjeldahl

Units: ug/l Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

     

Nitrogen, Nitrite + Nitrate as N

Units: ug/l Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

     

Oysters

Units: Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average 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
1/1/201670.14170.1400000%70.1400000
1/1/201765.22165.2200000%65.2200000

pH

Units: None Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

     

Salinity

Units: PSS Year
2017
Historical
period of record
High 34.7
Mean 17.52 10.05493
Low 0.35
No. of Samples 0 216

Five-year Rolling Average Graph

     

Specific conductance

Units: umho Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

     

Temperature, water

Units: deg F Year
2017
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Rolling Average Graph

     

Turbidity

Units: NTU Year
2017
Historical
period of record
High 42.0
Mean 4.71 4.37313
Low 0.27
No. of Samples 0 260

Five-year Rolling Average Graph

     
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 2017 56 105 161 65

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.