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Hudson Bayou Condition Report for 2012

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Caution

2 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
2012
Historical
period of record
High 0.1568 0.1568
Mean 0.0014 0.0015 0.01311093
Low 0.0003 0.0003
No. of Samples 24 157

Five-year Trend Graph

      
1/1/20081.3620.0013600mg/l0.0013600
2/1/20081.4320.0014000mg/l0.0013400
3/1/20080.9620.0012500mg/l0.0009500
4/1/20081.6920.0013600mg/l0.0016700
5/1/20081.4220.0013700mg/l0.0013000
6/1/20087.7420.0024300mg/l0.0059300
7/1/20081.9420.0025300mg/l0.0019000
8/1/20083.1820.0028200mg/l0.0013900
9/1/20080.6720.0027700mg/l0.0005300
10/1/20080.6220.0026000mg/l0.0005900
11/1/20080.9020.0025100mg/l0.0007500
12/1/20080.9320.0013700mg/l0.0008700
1/1/20093.6620.0016600mg/l0.0036100
2/1/200911.6520.0030700mg/l0.0114400
3/1/20097.9820.0042900mg/l0.0076600
4/1/20096.2920.0052400mg/l0.0057400
5/1/20093.1520.0056100mg/l0.0031000
6/1/20096.0920.0064700mg/l0.0050000
7/1/20093.5820.0064600mg/l0.0034500
8/1/20093.4720.0050900mg/l0.0026200
9/1/20090.5520.0038600mg/l0.0004900
10/1/20090.9320.0029600mg/l0.0008600
11/1/20090.5420.0025300mg/l0.0005200
12/1/20091.1220.0017000mg/l0.0011100
1/1/20100.6920.0012200mg/l0.0006700
2/1/20105.2620.0015200mg/l0.0038500
3/1/20102.1920.0017900mg/l0.0013100
4/1/20100.9520.0017900mg/l0.0008300
6/1/20104.3620.0026900mg/l0.0038700
7/1/20104.3320.0034200mg/l0.0040600
9/1/20100.6940.0025800mg/l0.0006800
10/1/20103.2620.0031600mg/l0.0025600
11/1/20101.2720.0027800mg/l0.0012600
12/1/20101.2820.0021700mg/l0.0012300
1/1/20112.1820.0017400mg/l0.0017500
2/1/20114.7720.0022400mg/l0.0044900
3/1/20114.0120.0028000mg/l0.0033500
4/1/20111.8920.0025700mg/l0.0018900
5/1/201111.2720.0042300mg/l0.0106300
6/1/20111.4420.0042600mg/l0.0014100
7/1/20111.1720.0040900mg/l0.0011700
8/1/20110.4920.0033800mg/l0.0004300
9/1/20110.4720.0027900mg/l0.0004300
10/1/20111.1120.0026600mg/l0.0010400
11/1/20110.6420.0008900mg/l0.0006100
12/1/20114.8020.0014500mg/l0.0017700
1/1/20122.6520.0016900mg/l0.0018100
2/1/20126.6420.0027200mg/l0.0024800
3/1/20125.9620.0036300mg/l0.0033200
4/1/20123.1320.0039700mg/l0.0019700
5/1/201280.6520.0173100mg/l0.0265300
6/1/20120.6220.0166100mg/l0.0006200
7/1/20120.6820.0162800mg/l0.0006000
8/1/20121.7120.0154600mg/l0.0017000
9/1/20120.4320.0145400mg/l0.0004100
10/1/20120.3420.0140700mg/l0.0003300
11/1/20124.6020.0014000mg/l0.0020900
12/1/20120.5420.0013800mg/l0.0004600
Target
mg/l
Threshold
0.02 mg/l
Pass

Nitrogen, Total

Score: Pass
Units: mg/l Year
2012
Historical
period of record
High 1.866 1.866
Mean 0.9244 0.8209 0.30304033
Low 0.549 0.082
No. of Samples 24 161

Five-year Trend Graph

      
1/1/2008511.5020.5115000mg/l0.5109600
2/1/2008468.0020.4897500mg/l0.4678900
3/1/2008404.5020.4613300mg/l0.3524500
4/1/2008719.5020.5258800mg/l0.7189700
5/1/2008982.5020.6172000mg/l0.9143700
6/1/2008860.5020.6577500mg/l0.7898300
7/1/2008886.5020.7202500mg/l0.8532500
8/1/2008681.5020.7558300mg/l0.6804700
9/1/2008731.0020.8102500mg/l0.7297900
10/1/2008513.0020.7758300mg/l0.5123400
11/1/2008692.0020.7274200mg/l0.6842900
12/1/2008637.0020.6901700mg/l0.6298800
1/1/2009532.0020.6310800mg/l0.5318400
2/1/2009498.0020.6005000mg/l0.4979900
3/1/2009939.0020.6351700mg/l0.8768300
4/1/2009718.0020.6693300mg/l0.6791400
5/1/2009963.5020.7145800mg/l0.9623300
6/1/20091166.0020.8027500mg/l1.1448600
7/1/20091080.0020.8940800mg/l1.0789300
8/1/2009802.5020.9448300mg/l0.7993100
9/1/20091022.0020.9586700mg/l1.0186200
10/1/2009998.0021.0053300mg/l0.9881300
11/1/2009956.5021.0041700mg/l0.9410000
12/1/20091152.0021.0018300mg/l1.1315700
1/1/20101171.5021.0170800mg/l1.1467600
2/1/2010948.5021.0414200mg/l0.9220300
3/1/20101034.0021.0434200mg/l1.0221600
4/1/2010858.5021.0201700mg/l0.8457300
6/1/20101206.5021.0438000mg/l1.1478800
7/1/2010980.0021.0055000mg/l0.9754800
9/1/20101228.7541.0684400mg/l1.1833000
10/1/2010976.0021.0978100mg/l0.9753000
11/1/20101025.0021.0832500mg/l1.0232400
12/1/2010912.0021.0243500mg/l0.9113700
1/1/2011765.0020.9813500mg/l0.7633000
2/1/20111280.0021.0311300mg/l1.1619100
3/1/2011904.0020.9770000mg/l0.9016600
4/1/2011937.0020.9705000mg/l0.9228900
5/1/20111344.0021.0236700mg/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
Pass

Phosphorus, Total

Score: Pass
Units: mg/l Year
2012
Historical
period of record
High 1.41 4.05
Mean 0.487 0.4556 0.39148216
Low 0.216 0.15
No. of Samples 24 164

Five-year Trend Graph

      
1/1/2008431.5020.4315000mg/l0.4163100
2/1/2008500.5020.4660000mg/l0.4874600
3/1/2008594.0020.5086700mg/l0.5714800
4/1/2008466.5020.4981300mg/l0.4481700
5/1/2008705.0020.5395000mg/l0.6148200
6/1/2008751.5020.5748300mg/l0.6979900
7/1/2008433.0020.5750800mg/l0.4097400
8/1/2008449.0020.5665000mg/l0.4294600
9/1/2008424.5020.5382500mg/l0.4055200
10/1/2008374.0020.5228300mg/l0.3524900
11/1/2008465.0020.4828300mg/l0.4335900
12/1/2008582.5020.4546700mg/l0.5121500
1/1/2009565.5020.4767500mg/l0.5029600
2/1/2009540.5020.4920000mg/l0.4961100
3/1/2009815.5020.5571700mg/l0.7642600
4/1/2009865.0020.6390000mg/l0.8167000
5/1/2009694.5020.6772500mg/l0.6492800
6/1/2009791.5020.7120800mg/l0.7664600
7/1/2009681.5020.7314200mg/l0.6546200
8/1/2009547.5020.7325800mg/l0.4998000
9/1/2009481.5020.6769200mg/l0.4354400
10/1/2009410.5020.6011700mg/l0.3927200
11/1/2009519.5020.5720000mg/l0.4416800
12/1/2009388.0020.5047500mg/l0.3659300
1/1/2010325.0020.4453300mg/l0.2991600
2/1/2010378.0020.4170800mg/l0.3526900
3/1/2010387.0020.4013300mg/l0.3695200
4/1/2010534.0020.4219200mg/l0.5001900
6/1/2010719.0020.4686000mg/l0.6382800
7/1/2010661.0020.5358000mg/l0.6015400
9/1/2010582.2540.6240600mg/l0.5342800
10/1/2010653.5020.6539400mg/l0.5792700
11/1/2010695.0020.6621500mg/l0.6143300
12/1/2010560.5020.6304500mg/l0.4731400
1/1/2011338.0020.5658500mg/l0.3098700
2/1/20112328.0020.8595400mg/l1.5666200
3/1/2011711.5020.8810800mg/l0.6922200
4/1/2011538.0020.8618300mg/l0.5029500
5/1/2011780.0020.8760000mg/l0.7614700
6/1/2011460.0020.8592500mg/l0.4327400
7/1/2011515.5020.8888300mg/l0.5026200
8/1/2011475.0020.5800000mg/l0.4468800
9/1/2011543.0020.5519200mg/l0.5130000
10/1/2011548.5020.5536700mg/l0.5060800
11/1/2011476.5020.5030800mg/l0.4264900
12/1/2011465.0020.5039200mg/l0.4117900
1/1/2012658.5020.5277500mg/l0.5059200
2/1/2012620.0020.5519200mg/l0.5304300
3/1/2012913.5020.6136700mg/l0.8531600
4/1/2012839.5020.6621700mg/l0.7146500
5/1/20121100.0020.7660800mg/l1.0554100
6/1/2012337.5020.7448300mg/l0.3374700
7/1/2012435.5020.7076700mg/l0.3823500
8/1/2012275.0020.6501700mg/l0.2748200
9/1/2012468.5020.5760000mg/l0.3946300
10/1/2012415.5020.5053300mg/l0.3931300
11/1/2012448.5020.3967500mg/l0.3960300
12/1/2012532.5020.4292500mg/l0.4730500
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
2012
Historical
period of record
High 118.50 144.70
Mean 47.83 50.83 31.21241
Low 8.10 4.20
No. of Samples 21 158

Five-year Trend Graph

      
1/1/200859.70259.7000000percent (%)59.5500000
2/1/200838.75249.2300000percent (%)35.9500000
3/1/200821.85240.1000000percent (%)18.1600000
4/1/200840.50240.2000000percent (%)32.1000000
5/1/200887.50249.6600000percent (%)85.8300000
6/1/200830.90246.5300000percent (%)29.5300000
7/1/200887.60251.1800000percent (%)86.2200000
8/1/200832.70250.1800000percent (%)30.7200000
9/1/200847.75254.4900000percent (%)46.5200000
10/1/200866.00258.7400000percent (%)62.8600000
11/1/200853.25253.0300000percent (%)47.9500000
12/1/200840.00254.5500000percent (%)30.1400000
1/1/200959.25249.8300000percent (%)54.1500000
2/1/200974.80256.8400000percent (%)71.4900000
3/1/200947.45256.7900000percent (%)36.3900000
4/1/200949.60254.0600000percent (%)39.1900000
5/1/200932.75250.6400000percent (%)21.6800000
6/1/200932.75249.4300000percent (%)27.8400000
7/1/200936.55245.6500000percent (%)28.1200000
8/1/200978.10246.2000000percent (%)58.9800000
9/1/200949.10246.4800000percent (%)44.4300000
10/1/200953.70247.1600000percent (%)43.1200000
11/1/200951.80250.3300000percent (%)41.6500000
12/1/200988.95259.7000000percent (%)83.6100000
1/1/201086.90268.0900000percent (%)85.3800000
2/1/2010118.90174.8900000percent (%)118.9000000
3/1/201092.30282.0900000percent (%)88.4700000
4/1/201059.30283.0300000percent (%)46.5800000
7/1/201015.00171.3800000percent (%)15.0000000
9/1/201071.40248.5700000percent (%)65.8900000
10/1/201069.70252.0300000percent (%)68.2200000
11/1/201089.90261.5000000percent (%)85.2300000
12/1/201064.30262.0600000percent (%)61.5500000
1/1/201162.95271.6500000percent (%)57.7900000
2/1/2011111.75278.3300000percent (%)106.7800000
3/1/201146.00274.1000000percent (%)40.5600000
4/1/2011114.05281.4900000percent (%)113.1100000
5/1/201133.20272.0400000percent (%)16.5200000
1/1/201260.25260.2500000percent (%)52.6700000
2/1/201262.50261.3800000percent (%)56.9300000
3/1/201270.00264.2500000percent (%)50.4800000
4/1/201250.05260.7000000percent (%)44.5300000
5/1/201228.80254.3200000percent (%)20.0200000
7/1/201222.80246.8300000percent (%)48.4000000
8/1/201260.65246.4600000percent (%)60.3000000
9/1/201279.70248.4000000percent (%)77.6200000
10/1/201258.40250.0700000percent (%)50.9200000
11/1/201250.60254.4300000percent (%)38.3600000
12/1/201259.15255.2200000percent (%)50.4700000
Target
percent (%)
Threshold
38.00 percent (%)

Rainfall

Units: inches Year
2012
Historical
period of record
High 39.18 53.67
Mean 12.6118057373258
Low 11.33
No. of Samples 356 4,750

Five-year Trend Graph

      
1/1/20082.33312.3300000inches2.3300000
2/1/20081.85291.8500000inches1.8500000
3/1/20082.11312.1100000inches2.1100000
4/1/20083.15303.1500000inches3.1500000
5/1/20083.73313.7300000inches3.7300000
6/1/20082.56302.5600000inches2.5600000
7/1/20089.71319.7100000inches9.7100000
8/1/20087.97317.9700000inches7.9700000
9/1/20086.05306.0500000inches6.0500000
10/1/20082.28312.2800000inches2.2800000
11/1/20080.37300.3700000inches0.3700000
12/1/20081.63311.6300000inches1.6300000
1/1/20091.84311.8400000inches1.8400000
2/1/20090.66280.6600000inches0.6600000
3/1/20091.11311.1100000inches1.1100000
4/1/20091.15301.1500000inches1.1500000
5/1/20096.15316.1500000inches6.1500000
6/1/20094.78304.7800000inches4.7800000
7/1/20096.87316.8700000inches6.8700000
8/1/20094.28314.2800000inches4.2800000
9/1/20099.87309.8700000inches9.8700000
10/1/20091.80311.8000000inches1.8000000
11/1/20092.60302.6000000inches2.6000000
12/1/20094.61314.6100000inches4.6100000
1/1/20103.48313.4800000inches3.4800000
2/1/20102.70282.7000000inches2.7000000
3/1/20105.61315.6100000inches5.6100000
4/1/20101.84301.8400000inches1.8400000
5/1/20100.27310.2700000inches0.2700000
6/1/20104.43304.4300000inches4.4300000
7/1/20107.87317.8700000inches7.8700000
8/1/201020.103120.1000000inches20.1000000
9/1/20103.76303.7600000inches3.7600000
10/1/20100.02310.0200000inches0.0200000
11/1/20102.18302.1800000inches2.1800000
12/1/20101.24311.2400000inches1.2400000
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
Target
inches
Threshold
inches

Salinity

Units: PSS Year
2012
Historical
period of record
High 12.17 12.17
Mean 0.41 0.38 1.18442
Low 0.11 0.11
No. of Samples 22 136

Five-year Trend Graph

      
1/1/20080.4620.4600000PSS0.4500000
2/1/20080.4220.4400000PSS0.4100000
3/1/20080.4320.4400000PSS0.4100000
4/1/20080.4220.4300000PSS0.4100000
5/1/20080.1820.3800000PSS0.1100000
6/1/20080.6120.4200000PSS0.5300000
7/1/20080.3820.4100000PSS0.3600000
8/1/20080.4220.4100000PSS0.4000000
9/1/20080.4320.4100000PSS0.4100000
10/1/20080.4120.4100000PSS0.3900000
11/1/20080.4120.4400000PSS0.4000000
12/1/20080.3620.4000000PSS0.3500000
1/1/20090.4020.4100000PSS0.3900000
2/1/20090.4120.4000000PSS0.4000000
3/1/20093.6620.9400000PSS1.4700000
4/1/20090.4320.9500000PSS0.4200000
5/1/20090.2620.9200000PSS0.2500000
6/1/20090.6620.9700000PSS0.5600000
7/1/20090.4020.9700000PSS0.3900000
8/1/20090.2320.9400000PSS0.2200000
9/1/20090.4120.4000000PSS0.3900000
10/1/20090.4920.4100000PSS0.4600000
11/1/20090.3420.4200000PSS0.3300000
12/1/20090.4320.3800000PSS0.4100000
1/1/20100.4120.3900000PSS0.3900000
2/1/20100.3110.4000000PSS0.3100000
3/1/20100.4120.4000000PSS0.3900000
4/1/20100.4120.3900000PSS0.3900000
7/1/20100.4610.4000000PSS0.4600000
9/1/20100.3520.4100000PSS0.3300000
10/1/20100.4320.4100000PSS0.4000000
11/1/20100.3420.4000000PSS0.3300000
12/1/20100.4020.4000000PSS0.4000000
1/1/20110.2520.3500000PSS0.2400000
2/1/20110.3620.3600000PSS0.3400000
3/1/20110.4320.3700000PSS0.4300000
4/1/20110.4320.3700000PSS0.4200000
5/1/20110.4220.3800000PSS0.4100000
1/1/20120.4720.4700000PSS0.4600000
2/1/20120.3720.4200000PSS0.3600000
3/1/20120.3220.3900000PSS0.3100000
4/1/20120.3620.3800000PSS0.3500000
5/1/20120.4520.3900000PSS0.4500000
7/1/20120.3920.3800000PSS0.3700000
8/1/20120.1320.3300000PSS0.1200000
9/1/20120.4220.3500000PSS0.4000000
10/1/20120.4320.3600000PSS0.4100000
11/1/20126.2921.5300000PSS2.2100000
12/1/20120.4321.3500000PSS0.4200000

Turbidity

Units: NTU Year
2012
Historical
period of record
High 26.00 38.00
Mean 4.44 3.33 3.80571
Low 1.30 1.00
No. of Samples 24 163

Five-year Trend Graph

      
1/1/20083.0523.0500000NTU2.6200000
2/1/20082.9423.0000000NTU2.6600000
3/1/20082.9522.9800000NTU2.9200000
4/1/20082.6522.9000000NTU2.5900000
5/1/200820.2026.3600000NTU9.5500000
6/1/20083.6025.9000000NTU3.2200000
7/1/20082.3025.7700000NTU2.3000000
8/1/20082.5525.7100000NTU2.5400000
9/1/20083.6525.8300000NTU3.6500000
10/1/20083.2525.9300000NTU3.0800000
11/1/20083.2423.1000000NTU2.8400000
12/1/20082.6522.9400000NTU2.5900000
1/1/20092.4022.9600000NTU2.3000000
2/1/20091.9022.8500000NTU1.8300000
3/1/20095.0523.0800000NTU4.3600000
4/1/20095.2523.4200000NTU4.6400000
5/1/20095.7523.8300000NTU5.5600000
6/1/20093.9524.0500000NTU3.9100000
7/1/20093.2024.1800000NTU3.1400000
8/1/20092.5524.2900000NTU2.5400000
9/1/20093.8524.0900000NTU3.5700000
10/1/20093.3023.7700000NTU2.7000000
11/1/20092.7823.2700000NTU2.3900000
12/1/20094.7523.4100000NTU4.2400000
1/1/20104.2023.5700000NTU3.9600000
2/1/20103.4523.7200000NTU3.0300000
3/1/20103.7023.7000000NTU3.4200000
4/1/20103.2523.6900000NTU2.8000000
6/1/20104.3523.7900000NTU3.9800000
7/1/20104.4523.8400000NTU4.4500000
9/1/20102.9043.7400000NTU2.8000000
10/1/20105.5524.3100000NTU5.4100000
11/1/20105.3524.5200000NTU5.3200000
12/1/20102.9524.2400000NTU2.9200000
1/1/20113.5524.0600000NTU3.4700000
2/1/20112.4323.7900000NTU2.1300000
3/1/20113.5523.9000000NTU3.2800000
4/1/20113.1723.5000000NTU2.8200000
5/1/20114.0023.2800000NTU3.9400000
6/1/20112.7523.2400000NTU2.6900000
7/1/20112.9523.1400000NTU2.8500000
8/1/20112.9023.2200000NTU2.8900000
9/1/20112.7023.0800000NTU2.6800000
10/1/20117.5523.8100000NTU6.9500000
11/1/20113.6023.7400000NTU3.5500000
12/1/20111.8323.5900000NTU1.8200000
1/1/20121.9023.4100000NTU1.8000000
2/1/20122.3023.3100000NTU2.2900000
3/1/201214.0025.2000000NTU7.2100000
4/1/20124.1824.6400000NTU3.4000000
5/1/20127.1525.2300000NTU6.5600000
6/1/20124.0025.5900000NTU3.9900000
7/1/20122.8025.7400000NTU2.7300000
8/1/201211.0027.1900000NTU11.0000000
9/1/20124.5525.6100000NTU4.3700000
10/1/20124.3025.6300000NTU3.9500000
11/1/20129.6526.0500000NTU8.5100000
12/1/20125.0526.2300000NTU4.9400000
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
Pass

Chlorophyll a

Score: Pass
Units: mg/l Year
2012
Historical
period of record
High 0.0 0.1
Mean 0.0009 0.0039 0.01111723
Low 0.0003 0.0003
No. of Samples 4 101

Five-year Trend Graph

     
1/1/20083.1030.0031000mg/l0.0026800
2/1/20084.8930.0040000mg/l0.0045700
3/1/20083.6930.0038900mg/l0.0035600
4/1/200816.7730.0071100mg/l0.0131600
5/1/20083.2110.0063300mg/l0.0032100
6/1/20088.0330.0066200mg/l0.0078200
7/1/20086.6630.0072100mg/l0.0056700
8/1/20083.8810.0070400mg/l0.0038800
9/1/20086.9030.0075800mg/l0.0050500
10/1/20086.9140.0059300mg/l0.0045800
11/1/20088.3420.0067900mg/l0.0083400
12/1/20081.0010.0056200mg/l0.0010000
1/1/200916.8010.0073100mg/l0.0168000
2/1/20093.1310.0071800mg/l0.0031300
3/1/20095.7810.0069900mg/l0.0057800
4/1/200912.9010.0079900mg/l0.0129000
5/1/200912.2010.0086400mg/l0.0122000
6/1/200935.7010.0144200mg/l0.0357000
7/1/200997.2010.0278200mg/l0.0972000
8/1/20095.7010.0282500mg/l0.0057000
9/1/20098.0010.0286200mg/l0.0080000
10/1/200919.1010.0296500mg/l0.0191000
11/1/200915.4010.0301800mg/l0.0154000
12/1/20095.0710.0250800mg/l0.0050700
1/1/201012.2010.0109100mg/l0.0122000
2/1/20103.2210.0105000mg/l0.0032200
3/1/20100.8510.0093100mg/l0.0008500
4/1/20101.7710.0064200mg/l0.0017700
6/1/201016.5010.0069100mg/l0.0165000
7/1/20105.5710.0055800mg/l0.0055700
9/1/20108.0120.0079600mg/l0.0061700
10/1/20104.7810.0087200mg/l0.0047800
11/1/20102.8610.0075400mg/l0.0028600
12/1/20100.3010.0043000mg/l0.0003000
1/1/20111.9310.0035800mg/l0.0019300
2/1/20110.4010.0030500mg/l0.0004000
3/1/20115.4210.0026200mg/l0.0054200
4/1/201114.5010.0042400mg/l0.0145000
5/1/20110.5710.0038500mg/l0.0005700
6/1/20112.8910.0042900mg/l0.0028900
7/1/20111.4110.0042000mg/l0.0014100
8/1/20110.2510.0041700mg/l0.0002500
9/1/20111.4310.0035100mg/l0.0014300
10/1/20111.1110.0012800mg/l0.0011100
11/1/20111.5010.0014300mg/l0.0015000
12/1/20110.2510.0009900mg/l0.0002500
1/1/20121.0510.0009300mg/l0.0010500
2/1/20120.2510.0009300mg/l0.0002500
3/1/20123.1210.0012100mg/l0.0031200
4/1/20120.9310.0011800mg/l0.0009300
Target
mg/l
Threshold
0.011 mg/l
Pass

Nitrogen, Total

No trend was observed after performing a trend analysis.
Score: Pass
Units: mg/l Year
2012
Historical
period of record
High 0.8 1.9
Mean 0.706 0.8557 0.30116518
Low 0.621 0.34
No. of Samples 4 129

Five-year Trend Graph

     
1/1/2008663.3330.6633300mg/l0.6560900
2/1/2008644.0030.6536700mg/l0.6387900
3/1/20081069.0030.7921100mg/l1.0117400
4/1/2008862.3330.8096700mg/l0.8547500
5/1/2008895.0010.8267300mg/l0.8950000
6/1/2008589.0030.7871100mg/l0.5889600
7/1/2008743.6730.8005000mg/l0.7430900
8/1/2008665.0010.8040000mg/l0.6650000
9/1/2008725.0030.7466700mg/l0.7188000
10/1/2008719.2540.7228200mg/l0.6881300
11/1/20081135.0020.7628200mg/l1.0655300
12/1/20081093.0010.8468200mg/l1.0930000
1/1/20091051.0010.8980400mg/l1.0510000
2/1/2009912.0010.9392100mg/l0.9120000
3/1/2009446.0010.8927100mg/l0.4460000
4/1/2009749.0010.8976700mg/l0.7490000
5/1/2009830.0010.8468300mg/l0.8300000
6/1/20091014.0010.8336700mg/l1.0140000
7/1/2009856.0010.8011700mg/l0.8560000
8/1/2009707.0010.7670000mg/l0.7070000
9/1/2009904.0010.8433300mg/l0.9040000
10/1/2009939.0010.8750000mg/l0.9390000
11/1/20091183.0010.9338300mg/l1.1830000
12/1/2009990.0010.9298300mg/l0.9900000
1/1/20101932.0011.1091700mg/l1.9320000
2/1/20101148.0011.1826700mg/l1.1480000
3/1/20101500.0011.2820000mg/l1.5000000
4/1/2010896.0011.2748300mg/l0.8960000
6/1/2010918.0011.2788000mg/l0.9180000
7/1/2010990.0011.0904000mg/l0.9900000
9/1/2010952.5020.9391300mg/l0.9523700
10/1/20101706.0011.1416300mg/l1.7060000
11/1/2010768.0011.0669000mg/l0.7680000
12/1/2010479.0010.9791000mg/l0.4790000
1/1/2011744.0010.9299000mg/l0.7440000
2/1/20111205.0010.9757500mg/l1.2050000
3/1/20111012.0010.9856700mg/l1.0120000
4/1/20111029.0010.8728300mg/l1.0290000
5/1/2011978.0010.9078300mg/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
Caution

Phosphorus, Total

Trend analysis shows a weak increasing trend.
Score: Caution
Units: mg/l Year
2012
Historical
period of record
High 0.7 1.3
Mean 0.5815 0.2867 0.23354287
Low 0.502 0.05
No. of Samples 4 141

Five-year Trend Graph

     
1/1/2008258.6730.2586700mg/l0.1877900
2/1/2008283.3330.2710000mg/l0.1803800
3/1/2008323.0030.2883300mg/l0.2516700
4/1/2008269.0030.2835000mg/l0.2207200
5/1/2008666.0010.3600000mg/l0.6660000
6/1/2008166.0030.3276700mg/l0.1545200
7/1/2008222.3330.3216100mg/l0.1933200
8/1/2008498.0010.3573900mg/l0.4980000
9/1/2008275.3330.3494400mg/l0.1971600
10/1/2008269.5040.3495300mg/l0.2081700
11/1/2008691.0010.3536900mg/l0.6910000
12/1/2008715.0010.4451900mg/l0.7150000
1/1/2009798.0010.5411400mg/l0.7980000
2/1/2009623.0010.5619700mg/l0.6230000
3/1/2009285.0010.5635800mg/l0.2850000
4/1/2009592.0010.6173300mg/l0.5920000
5/1/2009454.0010.5778300mg/l0.4540000
6/1/2009502.0010.5423300mg/l0.5020000
7/1/2009583.0010.5065000mg/l0.5830000
8/1/2009397.0010.4688300mg/l0.3970000
9/1/2009384.0010.4853300mg/l0.3840000
10/1/2009342.0010.4436700mg/l0.3420000
11/1/2009484.0010.4486700mg/l0.4840000
12/1/2009484.0010.4456700mg/l0.4840000
1/1/2010803.0010.4823300mg/l0.8030000
2/1/2010638.0010.5225000mg/l0.6380000
3/1/2010658.0010.5681700mg/l0.6580000
4/1/2010775.0010.6403300mg/l0.7750000
6/1/2010562.0010.6872000mg/l0.5620000
7/1/2010578.0010.6422000mg/l0.5780000
9/1/2010533.0020.6120000mg/l0.5311800
10/1/2010652.0010.5812500mg/l0.6520000
11/1/2010492.0010.5634000mg/l0.4920000
12/1/2010284.0010.5078000mg/l0.2840000
1/1/2011499.0010.4920000mg/l0.4990000
2/1/20111300.0010.6266700mg/l1.3000000
3/1/2011559.0010.6310000mg/l0.5590000
4/1/2011634.0010.6280000mg/l0.6340000
5/1/2011737.0010.6688300mg/l0.7370000
6/1/2011572.0010.7168300mg/l0.5720000
7/1/2011602.0010.7340000mg/l0.6020000
8/1/2011551.0010.6091700mg/l0.5510000
9/1/2011620.0010.6193300mg/l0.6200000
10/1/2011222.0010.5506700mg/l0.2220000
11/1/2011456.0010.5038300mg/l0.4560000
12/1/2011562.0010.5021700mg/l0.5620000
1/1/2012602.0010.5021700mg/l0.6020000
2/1/2012582.0010.5073300mg/l0.5820000
3/1/2012650.0010.5123300mg/l0.6500000
4/1/2012502.0010.5590000mg/l0.5020000
Target
mg/l
Threshold
mg/l
Caution

Dissolved Oxygen Saturation

Note: Low DO saturation also may be naturally influenced by inflows from nearby wetlands or groundwater sources
Score: Caution
Units: percent (%) Year
2012
Historical
period of record
High 84.3 128.7
Mean 27.67 45.03 26.04084
Low 9.70 0.70
No. of Samples 4 207

Five-year Trend Graph

     
1/1/200840.27340.2700000percent (%)39.8100000
2/1/200840.70340.4900000percent (%)30.3500000
3/1/200840.37340.4500000percent (%)25.2000000
4/1/200870.50347.9600000percent (%)49.5300000
5/1/200856.90149.7500000percent (%)56.9000000
6/1/200839.23348.0000000percent (%)35.6600000
7/1/200883.80255.2500000percent (%)83.7300000
8/1/20088.00149.8000000percent (%)8.0000000
9/1/200851.20551.6100000percent (%)50.0300000
10/1/200853.95448.8500000percent (%)41.0400000
11/1/200854.63348.4700000percent (%)45.0300000
12/1/200826.00146.2600000percent (%)26.0000000
1/1/200919.20135.5000000percent (%)19.2000000
2/1/200963.10144.6800000percent (%)63.1000000
3/1/200944.10143.5000000percent (%)44.1000000
4/1/200911.40136.4100000percent (%)11.4000000
6/1/200915.70130.7000000percent (%)15.7000000
7/1/200929.20132.7000000percent (%)29.2000000
8/1/200921.80124.4400000percent (%)21.8000000
9/1/20090.70115.7600000percent (%)0.7000000
11/1/200911.60115.8000000percent (%)11.6000000
12/1/200912.10115.0800000percent (%)12.1000000
1/1/201018.70112.9800000percent (%)18.7000000
2/1/201022.60113.1400000percent (%)22.6000000
3/1/201055.50124.1000000percent (%)55.5000000
4/1/201028.10124.7700000percent (%)28.1000000
7/1/201015.30130.3800000percent (%)15.3000000
9/1/201027.10123.5000000percent (%)27.1000000
10/1/201010.50117.6300000percent (%)10.5000000
11/1/201030.20120.7800000percent (%)30.2000000
12/1/201033.90123.4000000percent (%)33.9000000
1/1/201169.30134.2000000percent (%)69.3000000
2/1/201157.40138.0700000percent (%)57.4000000
3/1/20114.00134.2200000percent (%)4.0000000
4/1/201155.60141.7300000percent (%)55.6000000
5/1/201137.10142.8800000percent (%)37.1000000
1/1/201214.70114.7000000percent (%)14.7000000
2/1/20129.70112.2000000percent (%)9.7000000
3/1/201284.30136.2300000percent (%)84.3000000
4/1/201248.80139.3800000percent (%)48.8000000
Target
percent (%)
Threshold
56.00 percent (%)

Oysters

Units: Year
2012
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

Rainfall

Units: inches Year
2012
Historical
period of record
High 39.2 53.7
Mean 12.6118057373258
Low 11.33
No. of Samples 356 4,750

Five-year Trend Graph

     
1/1/20082.33312.3300000inches2.3300000
2/1/20081.85291.8500000inches1.8500000
3/1/20082.11312.1100000inches2.1100000
4/1/20083.15303.1500000inches3.1500000
5/1/20083.73313.7300000inches3.7300000
6/1/20082.56302.5600000inches2.5600000
7/1/20089.71319.7100000inches9.7100000
8/1/20087.97317.9700000inches7.9700000
9/1/20086.05306.0500000inches6.0500000
10/1/20082.28312.2800000inches2.2800000
11/1/20080.37300.3700000inches0.3700000
12/1/20081.63311.6300000inches1.6300000
1/1/20091.84311.8400000inches1.8400000
2/1/20090.66280.6600000inches0.6600000
3/1/20091.11311.1100000inches1.1100000
4/1/20091.15301.1500000inches1.1500000
5/1/20096.15316.1500000inches6.1500000
6/1/20094.78304.7800000inches4.7800000
7/1/20096.87316.8700000inches6.8700000
8/1/20094.28314.2800000inches4.2800000
9/1/20099.87309.8700000inches9.8700000
10/1/20091.80311.8000000inches1.8000000
11/1/20092.60302.6000000inches2.6000000
12/1/20094.61314.6100000inches4.6100000
1/1/20103.48313.4800000inches3.4800000
2/1/20102.70282.7000000inches2.7000000
3/1/20105.61315.6100000inches5.6100000
4/1/20101.84301.8400000inches1.8400000
5/1/20100.27310.2700000inches0.2700000
6/1/20104.43304.4300000inches4.4300000
7/1/20107.87317.8700000inches7.8700000
8/1/201020.103120.1000000inches20.1000000
9/1/20103.76303.7600000inches3.7600000
10/1/20100.02310.0200000inches0.0200000
11/1/20102.18302.1800000inches2.1800000
12/1/20101.24311.2400000inches1.2400000
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
Target
inches
Threshold
inches

Salinity

Units: PSS Year
2012
Historical
period of record
High 24.9 34.7
Mean 7.98 21.23 8.62663
Low 0.52 0.35
No. of Samples 4 180

Five-year Trend Graph

     
1/1/200826.07326.0700000PSS23.0300000
2/1/200825.77325.9200000PSS22.9500000
3/1/200828.64326.8300000PSS28.1900000
4/1/200829.61327.5200000PSS28.9600000
5/1/200815.34125.0900000PSS15.3400000
6/1/200831.89326.2200000PSS31.8900000
7/1/200831.22327.0800000PSS31.2000000
8/1/200831.34128.0100000PSS31.3400000
9/1/200828.96528.0600000PSS28.7500000
10/1/200830.66428.2400000PSS30.4600000
11/1/200829.14330.5400000PSS28.6200000
12/1/200819.53128.4800000PSS19.5300000
1/1/200914.38125.6700000PSS14.3800000
2/1/20090.65120.5500000PSS0.6500000
3/1/200921.75119.3500000PSS21.7500000
4/1/200926.87118.7200000PSS26.8700000
6/1/200930.40118.8100000PSS30.4000000
7/1/200922.31120.4000000PSS22.3100000
8/1/200927.28125.7200000PSS27.2800000
9/1/200928.95127.1600000PSS28.9500000
11/1/200925.30126.8500000PSS25.3000000
12/1/200923.66125.5000000PSS23.6600000
1/1/20105.15122.0700000PSS5.1500000
2/1/20107.94118.2000000PSS7.9400000
3/1/20100.52112.5100000PSS0.5200000
4/1/20109.14111.9500000PSS9.1400000
7/1/201023.63110.3100000PSS23.6300000
9/1/201030.10120.9600000PSS30.1000000
10/1/201027.65127.1300000PSS27.6500000
11/1/201026.37126.9400000PSS26.3700000
12/1/201012.27124.0000000PSS12.2700000
1/1/20110.63119.4000000PSS0.6300000
2/1/20111.45116.4100000PSS1.4500000
3/1/201114.78113.8600000PSS14.7800000
4/1/201110.02110.9200000PSS10.0200000
5/1/20111.1316.7100000PSS1.1300000
1/1/201224.88124.8800000PSS24.8800000
2/1/201215.68120.2800000PSS15.6800000
3/1/20120.52113.6900000PSS0.5200000
4/1/201219.98115.2700000PSS19.9800000

Turbidity

Units: NTU Year
2012
Historical
period of record
High 7.0 42.0
Mean 3.61 4.67 4.46691
Low 2.30 0.27
No. of Samples 4 204

Five-year Trend Graph

     
1/1/20086.1736.1700000NTU5.6600000
2/1/20086.2336.2000000NTU6.0100000
3/1/20084.0035.4700000NTU3.8900000
4/1/20085.9735.5900000NTU5.4900000
5/1/20084.4015.3500000NTU4.4000000
6/1/20087.6335.7300000NTU6.4100000
7/1/20083.8735.3500000NTU3.6800000
8/1/200814.5016.7300000NTU14.5000000
9/1/20083.7036.6800000NTU3.5900000
10/1/20083.7736.3100000NTU3.4900000
11/1/200842.00112.5800000NTU42.0000000
12/1/200810.80113.1100000NTU10.8000000
1/1/20095.30113.3500000NTU5.3000000
2/1/20097.70112.2100000NTU7.7000000
3/1/20095.40112.5000000NTU5.4000000
4/1/20094.70112.6500000NTU4.7000000
5/1/20096.9016.8000000NTU6.9000000
6/1/200915.0017.5000000NTU15.0000000
7/1/20099.2018.1500000NTU9.2000000
8/1/200917.2019.7300000NTU17.2000000
9/1/200914.80111.3000000NTU14.8000000
10/1/20097.80111.8200000NTU7.8000000
11/1/200912.40112.7300000NTU12.4000000
12/1/200917.60113.1700000NTU17.6000000
1/1/201021.00115.1300000NTU21.0000000
2/1/20103.70112.8800000NTU3.7000000
3/1/20103.20110.9500000NTU3.2000000
4/1/201011.40111.5500000NTU11.4000000
6/1/20102.2018.3000000NTU2.2000000
7/1/20108.3015.7600000NTU8.3000000
9/1/20107.0027.2300000NTU6.9600000
10/1/201013.1017.6500000NTU13.1000000
11/1/20108.0017.7200000NTU8.0000000
12/1/20106.4018.5600000NTU6.4000000
1/1/20115.1017.9200000NTU5.1000000
2/1/20115.0017.4300000NTU5.0000000
3/1/20114.3016.9800000NTU4.3000000
4/1/20118.5016.2200000NTU8.5000000
5/1/20112.1015.2300000NTU2.1000000
6/1/20113.8014.8000000NTU3.8000000
7/1/20114.0014.6200000NTU4.0000000
8/1/20112.6014.2200000NTU2.6000000
9/1/20113.3014.0500000NTU3.3000000
10/1/20117.1013.8200000NTU7.1000000
11/1/20113.8014.1000000NTU3.8000000
12/1/20112.4013.8700000NTU2.4000000
1/1/20122.3013.5800000NTU2.3000000
2/1/20122.5013.5700000NTU2.5000000
3/1/20127.0014.1800000NTU7.0000000
4/1/20124.2013.7000000NTU4.2000000
Other Measures of Creek Health

Oysters

Because they are immobile and will tolerate a fairly wide salinity range, eastern oysters (Crassotrea 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 »

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Most Recent Sarasota County Oyster Monitoring Program Data
Icon Site ID Year Dead Live Total % Live
1 HUD2 2011 74 176 250 70

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.