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Whitaker 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: 4,967 acres
  • Location: North Sarasota County, south Manatee County
  • Discharges into: Sarasota Bay

Whitaker Bayou is a highly urbanized basin that has changed in land use and hydrology since the mid-1900s. The Sarasota County 1847 General Land Office Survey indicates that Whitaker Bayou only extended about a quarter of a mile inland from the bay. The survey also displays a separate waterway that extends inland from 0.25 mile northeast of the head of Whitaker Bayou. Seasonal patterns in freshwater inflows have not changed significantly between historic and current conditions, indicating that changes in land use have not altered the intra-annual pattern of inflows to the bay. Land use has, however, affected the magnitude of total inflow to the bay, if not the relative contributions of individual sources (runoff, baseflow, irrigation, point sources). For full 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:
  • 1936A
Pass

Chlorophyll a

Score: Pass
Units: mg/l Year
2012
Historical
period of record
High 0.0125 0.0595
Mean 0.002 0.0018 0.00534853
Low 0.0003 0.00
No. of Samples 20 221

Five-year Trend Graph

      
1/1/20081.8830.0018800mg/l0.0017100
2/1/20080.9430.0014100mg/l0.0009200
3/1/20081.2320.0013500mg/l0.0012200
4/1/20081.8330.0014700mg/l0.0018000
5/1/20081.8930.0015500mg/l0.0016900
6/1/20081.4730.0015400mg/l0.0013700
7/1/20082.4220.0016300mg/l0.0020700
8/1/20081.7430.0017600mg/l0.0014700
9/1/20082.8330.0020300mg/l0.0025100
10/1/20081.2330.0019300mg/l0.0010800
11/1/20080.7230.0017400mg/l0.0006800
12/1/20082.4630.0019000mg/l0.0018500
1/1/200911.4930.0034100mg/l0.0061900
2/1/20091.3230.0033400mg/l0.0013100
3/1/20092.0730.0032200mg/l0.0017300
4/1/20098.5630.0044400mg/l0.0056500
5/1/20094.7750.0051100mg/l0.0038900
6/1/20092.5630.0051300mg/l0.0021800
7/1/20091.8230.0035200mg/l0.0017000
8/1/20091.4430.0035400mg/l0.0014200
9/1/20091.9830.0035200mg/l0.0017900
10/1/20091.8230.0024000mg/l0.0016100
11/1/20096.5550.0027000mg/l0.0026300
12/1/20091.4830.0025200mg/l0.0014000
1/1/20101.5330.0024700mg/l0.0014500
2/1/20105.3830.0031200mg/l0.0030400
3/1/20104.5630.0035500mg/l0.0031900
4/1/20101.7730.0035500mg/l0.0017400
6/1/20104.2930.0035100mg/l0.0030100
7/1/20101.9430.0035900mg/l0.0019000
9/1/20102.2960.0025700mg/l0.0017400
10/1/20103.2030.0029300mg/l0.0020700
11/1/20101.9330.0027300mg/l0.0013800
12/1/20100.7630.0020200mg/l0.0006600
1/1/20115.4430.0027200mg/l0.0053800
2/1/20111.2430.0024800mg/l0.0010500
3/1/20110.8830.0022400mg/l0.0007800
4/1/20111.8430.0020200mg/l0.0017200
5/1/20115.8130.0026600mg/l0.0044700
6/1/20116.2230.0035700mg/l0.0057100
7/1/20113.2330.0032000mg/l0.0026300
8/1/20118.9530.0044900mg/l0.0069800
9/1/20111.3030.0045600mg/l0.0012600
10/1/20111.9730.0045800mg/l0.0019600
11/1/20111.1430.0038000mg/l0.0010700
12/1/201121.3130.0063200mg/l0.0053100
1/1/20127.1030.0069600mg/l0.0055000
2/1/20124.8430.0062800mg/l0.0021600
3/1/20122.5230.0064800mg/l0.0019900
4/1/20122.1530.0065100mg/l0.0019400
5/1/20120.6410.0064300mg/l0.0006400
6/1/20129.6110.0044800mg/l0.0096100
7/1/20123.2010.0038300mg/l0.0032000
8/1/20123.1610.0035500mg/l0.0031600
9/1/20121.0410.0033000mg/l0.0010400
10/1/20121.6810.0032200mg/l0.0016800
11/1/20120.4110.0031800mg/l0.0004100
12/1/20120.2610.0016300mg/l0.0002600
Target
mg/l
Threshold
0.02 mg/l
Pass

Nitrogen, Total

Score: Pass
Units: mg/l Year
2012
Historical
period of record
High 1.441 15.76
Mean 0.8496 0.8929 1.73829718
Low 0.604 0.30
No. of Samples 20 268

Five-year Trend Graph

      
1/1/2008449.8330.4498300mg/l0.4365000
2/1/2008405.6730.4277500mg/l0.4017800
3/1/2008449.0020.4348300mg/l0.4459800
4/1/2008861.3330.5414600mg/l0.8513200
5/1/2008814.6730.5961000mg/l0.7916900
6/1/20081067.5030.6746700mg/l0.9652900
7/1/2008636.5020.7057800mg/l0.6361000
8/1/2008722.0030.7585000mg/l0.7192200
9/1/20081051.3330.8588900mg/l0.9760300
10/1/2008599.0030.8151700mg/l0.5822700
11/1/2008517.6730.7656700mg/l0.5108600
12/1/2008780.0030.7177500mg/l0.7688600
1/1/2009655.0030.7208300mg/l0.6495000
2/1/2009735.0030.7230000mg/l0.7314400
3/1/2009790.3330.6795000mg/l0.7827200
4/1/2009950.6730.7381100mg/l0.9149500
5/1/2009822.7540.7889600mg/l0.7873000
6/1/2009765.6730.7865700mg/l0.7609400
7/1/2009716.3330.7967900mg/l0.7099200
8/1/2009646.0030.7819600mg/l0.6455100
9/1/20091076.0030.8295700mg/l1.0736500
10/1/2009872.6730.8165700mg/l0.8398200
11/1/2009845.0040.8202800mg/l0.8010700
12/1/20091134.0030.8816700mg/l1.0824900
1/1/20101272.6730.9743900mg/l1.2415500
2/1/2010820.6731.0035000mg/l0.8199000
3/1/20101110.3331.0092200mg/l1.1015300
4/1/2010924.0031.0177800mg/l0.8682900
6/1/20101998.0031.2251300mg/l1.9020400
7/1/2010934.6731.1575300mg/l0.9332000
9/1/20101291.8361.2871300mg/l1.2231800
10/1/2010864.6731.2722900mg/l0.8537900
11/1/2010740.3331.1659000mg/l0.7230800
12/1/2010719.0030.9101000mg/l0.6983300
1/1/20111050.3330.9332300mg/l1.0330600
2/1/2011763.0030.9048600mg/l0.7563100
3/1/2011833.3330.8284400mg/l0.8266100
4/1/2011788.6730.8157800mg/l0.7825800
5/1/2011950.0030.8507200mg/l0.9391700
6/1/20111114.6730.9166700mg/l1.0953100
7/1/20111210.0030.9432800mg/l1.0703100
8/1/20111346.0031.0404500mg/l1.3073100
9/1/2011884.0031.0488900mg/l0.8587800
10/1/2011676.0031.0301100mg/l0.6570200
11/1/2011766.3330.9995000mg/l0.7152300
12/1/2011858.3330.9567800mg/l0.8334400
1/1/2012837.0030.8946100mg/l0.8219100
2/1/2012899.0030.8201100mg/l0.8777600
3/1/2012735.6730.7953900mg/l0.7292000
4/1/2012701.6730.7996700mg/l0.6908700
5/1/2012656.0010.7812800mg/l0.6560000
6/1/20121441.0010.8783900mg/l1.4410000
7/1/20121070.0010.9172200mg/l1.0700000
8/1/20121102.0010.9510600mg/l1.1020000
9/1/2012855.0010.9709500mg/l0.8550000
10/1/20121062.0011.0310000mg/l1.0620000
11/1/2012910.0011.0733300mg/l0.9100000
12/1/2012868.0010.9778300mg/l0.8680000
Pass

Phosphorus, Total

Score: Pass
Units: mg/l Year
2012
Historical
period of record
High 0.948 2.38
Mean 0.3248 0.3098 0.2205205
Low 0.105 0.105
No. of Samples 20 261

Five-year Trend Graph

      
1/1/2008161.0030.1610000mg/l0.1602100
2/1/2008231.0030.1960000mg/l0.2238600
3/1/2008210.5020.2008300mg/l0.2003700
4/1/2008268.0030.2176300mg/l0.2588800
5/1/2008365.0030.2471000mg/l0.3637800
6/1/2008430.3330.2776400mg/l0.4208600
7/1/2008325.0020.3049700mg/l0.3242500
8/1/2008282.6730.3135800mg/l0.2722300
9/1/2008353.6730.3374500mg/l0.3431200
10/1/2008187.6730.3240600mg/l0.1759600
11/1/2008191.0020.2950600mg/l0.1875800
12/1/2008228.3330.2613900mg/l0.2169500
1/1/2009246.6730.2483400mg/l0.2339000
2/1/2009239.3330.2411100mg/l0.2228000
3/1/2009567.3330.2767200mg/l0.5604600
4/1/2009438.6730.3185600mg/l0.4338900
5/1/2009414.5040.3558100mg/l0.4083300
6/1/2009423.6730.3883600mg/l0.4199000
7/1/2009346.0030.4049200mg/l0.3377000
8/1/2009404.0030.4323600mg/l0.4039500
9/1/2009341.6730.3947500mg/l0.3326300
10/1/2009309.6730.3732500mg/l0.3021800
11/1/2009187.2540.3353800mg/l0.1846900
12/1/2009223.3330.3019900mg/l0.2189000
1/1/2010187.0030.2754900mg/l0.1847100
2/1/2010227.0030.2459900mg/l0.2146900
3/1/2010242.0030.2293800mg/l0.2329100
4/1/2010258.0030.2207600mg/l0.2515100
6/1/20101316.6730.4461300mg/l1.1117900
7/1/2010397.0030.4881300mg/l0.3857800
9/1/2010367.3360.5847500mg/l0.3625700
10/1/2010264.0030.5862500mg/l0.2560900
11/1/2010239.6730.5169300mg/l0.2292600
12/1/2010165.6730.2867300mg/l0.1616400
1/1/2011515.3330.3104000mg/l0.4822300
2/1/2011227.3330.2965600mg/l0.2234000
3/1/2011297.3330.2848900mg/l0.2952700
4/1/2011324.6730.2950000mg/l0.2995000
5/1/2011607.6730.3563300mg/l0.5862300
6/1/2011602.3330.4291100mg/l0.5966000
7/1/2011335.0030.3990600mg/l0.3332000
8/1/2011455.3330.4370600mg/l0.4496300
9/1/2011240.6730.4276100mg/l0.2369500
10/1/2011242.3330.4138900mg/l0.2358300
11/1/2011249.0030.3541100mg/l0.2467900
12/1/2011445.0030.3278900mg/l0.3453500
1/1/2012351.0030.3305600mg/l0.2833100
2/1/2012313.6730.3069500mg/l0.2978100
3/1/2012345.6730.3244500mg/l0.3303100
4/1/2012469.6730.3623400mg/l0.4431100
5/1/2012948.0010.4788400mg/l0.9480000
6/1/2012317.0010.4575000mg/l0.3170000
7/1/2012390.0010.4640000mg/l0.3900000
8/1/2012370.0010.4733900mg/l0.3700000
9/1/2012253.0010.4579500mg/l0.2530000
10/1/2012255.0010.4221700mg/l0.2550000
11/1/2012158.0010.2905000mg/l0.1580000
12/1/2012205.0010.2718300mg/l0.2050000
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 262.30 492.60
Mean 90.66 70.53 46.32197
Low 26.20 7.0588
No. of Samples 19 304

Five-year Trend Graph

      
1/1/200874.53374.5300000percent (%)73.1000000
2/1/200884.97379.7500000percent (%)77.3800000
3/1/200828.05262.5200000percent (%)27.9300000
4/1/200873.20265.1900000percent (%)55.4400000
5/1/200886.47369.4400000percent (%)80.0000000
6/1/200890.55272.9600000percent (%)85.3100000
9/1/200877.43381.9100000percent (%)77.0100000
10/1/2008119.03393.3700000percent (%)118.8300000
11/1/2008116.103100.7800000percent (%)115.9000000
12/1/2008121.873108.6100000percent (%)118.4200000
1/1/200988.703104.6300000percent (%)88.3900000
2/1/2009107.973105.1800000percent (%)107.2500000
4/1/2009101.973107.3200000percent (%)76.4300000
5/1/2009103.403104.7800000percent (%)101.8100000
6/1/200976.73395.7500000percent (%)47.7400000
7/1/200986.20395.2500000percent (%)85.9700000
8/1/2009102.30394.1200000percent (%)101.9100000
9/1/200975.40391.0000000percent (%)74.6600000
10/1/200983.03387.8400000percent (%)82.4900000
11/1/200978.70383.7300000percent (%)53.3000000
12/1/2009112.80389.7400000percent (%)103.7900000
1/1/2010116.20394.7400000percent (%)114.6100000
2/1/2010128.10299.0400000percent (%)128.0700000
3/1/2010113.973105.4700000percent (%)113.7700000
4/1/2010163.802118.9300000percent (%)158.9400000
7/1/201081.352121.8100000percent (%)81.2800000
9/1/2010134.803126.6500000percent (%)132.9900000
10/1/201083.10399.7500000percent (%)82.1800000
11/1/2010147.303111.6400000percent (%)147.1300000
12/1/2010109.403111.1900000percent (%)108.2700000
1/1/201181.802111.2800000percent (%)81.7300000
2/1/2011137.433115.6400000percent (%)133.7700000
3/1/2011119.603113.1100000percent (%)109.4800000
4/1/2011159.073125.7700000percent (%)155.2200000
5/1/201194.233116.9200000percent (%)92.9400000
1/1/201274.13374.1300000percent (%)64.3300000
2/1/201298.47386.3000000percent (%)91.7600000
3/1/2012154.273108.9600000percent (%)106.2000000
4/1/2012130.973114.4600000percent (%)126.9800000
5/1/2012106.901112.9500000percent (%)106.9000000
7/1/201275.501113.2200000percent (%)75.5000000
8/1/201262.301105.9900000percent (%)62.3000000
9/1/201268.10188.7500000percent (%)68.1000000
10/1/201290.50180.6600000percent (%)90.5000000
11/1/201296.20178.5200000percent (%)96.2000000
12/1/2012103.30182.6500000percent (%)103.3000000
Target
percent (%)
Threshold
38.00 percent (%)

Rainfall

Units: inches Year
2012
Historical
period of record
High 42.06 54.47
Mean 11.4111515969788
Low 14.17
No. of Samples 356 4,832

Five-year Trend Graph

      
1/1/20081.89311.8900000inches1.8900000
2/1/20082.16292.1600000inches2.1600000
3/1/20083.02313.0200000inches3.0200000
4/1/20082.62302.6200000inches2.6200000
5/1/20081.86311.8600000inches1.8600000
6/1/20083.91303.9100000inches3.9100000
7/1/20086.83316.8300000inches6.8300000
8/1/20086.03316.0300000inches6.0300000
9/1/20084.26304.2600000inches4.2600000
10/1/20081.63311.6300000inches1.6300000
11/1/20080.69300.6900000inches0.6900000
12/1/20081.43301.4300000inches1.4300000
1/1/20091.56321.5600000inches1.5600000
2/1/20090.56280.5600000inches0.5600000
3/1/20091.22311.2200000inches1.2200000
4/1/20091.64301.6400000inches1.6400000
5/1/20094.54314.5400000inches4.5400000
6/1/20094.21304.2100000inches4.2100000
7/1/20095.75315.7500000inches5.7500000
8/1/20094.99314.9900000inches4.9900000
9/1/20098.83308.8300000inches8.8300000
10/1/20091.00311.0000000inches1.0000000
11/1/20091.53301.5300000inches1.5300000
12/1/20093.03313.0300000inches3.0300000
1/1/20103.95313.9500000inches3.9500000
2/1/20102.11282.1100000inches2.1100000
3/1/20105.09315.0900000inches5.0900000
4/1/20101.38301.3800000inches1.3800000
5/1/20100.87310.8700000inches0.8700000
6/1/20106.31306.3100000inches6.3100000
7/1/20105.45315.4500000inches5.4500000
8/1/201012.113112.1100000inches12.1100000
9/1/20102.24302.2400000inches2.2400000
10/1/20100.01310.0100000inches0.0100000
11/1/20102.77302.7700000inches2.7700000
12/1/20100.86310.8600000inches0.8600000
1/1/20112.83312.8300000inches2.8300000
2/1/20110.73280.7300000inches0.7300000
3/1/20115.81315.8100000inches5.8100000
4/1/20111.49301.4900000inches1.4900000
5/1/20112.21312.2100000inches2.2100000
6/1/20113.24303.2400000inches3.2400000
7/1/20118.71318.7100000inches8.7100000
8/1/20117.69317.6900000inches7.6900000
9/1/20114.01304.0100000inches4.0100000
10/1/20111.88301.8800000inches1.8800000
11/1/20111.10301.1000000inches1.1000000
12/1/20110.16290.1600000inches0.1600000
1/1/20120.67290.6700000inches0.6700000
2/1/20121.05291.0500000inches1.0500000
3/1/20121.67311.6700000inches1.6700000
4/1/20122.57242.5700000inches2.5700000
5/1/20121.86311.8600000inches1.8600000
6/1/201215.043015.0400000inches15.0400000
7/1/20124.59314.5900000inches4.5900000
8/1/20128.33318.3300000inches8.3300000
9/1/20122.20302.2000000inches2.2000000
10/1/20122.49312.4900000inches2.4900000
11/1/20120.00280.0000000inches0.0000000
12/1/20121.59311.5900000inches1.5900000
Target
inches
Threshold
inches

Salinity

Units: PSS Year
2012
Historical
period of record
High 0.44 20.48
Mean 0.32 0.42 1.08386
Low 0.25 0.00
No. of Samples 19 462

Five-year Trend Graph

      
1/1/20080.3230.3200000PSS0.3200000
2/1/20080.3630.3400000PSS0.3600000
3/1/20080.3220.3300000PSS0.3200000
4/1/20080.4320.3600000PSS0.4200000
5/1/20080.3530.3600000PSS0.3500000
6/1/20080.4620.3700000PSS0.4500000
7/1/20080.2620.3600000PSS0.2500000
9/1/20080.2930.3600000PSS0.2900000
10/1/20080.3230.3400000PSS0.3200000
11/1/20080.3430.3300000PSS0.3400000
12/1/20080.3230.3100000PSS0.3200000
1/1/20090.3730.3300000PSS0.3700000
2/1/20090.3730.3400000PSS0.3700000
4/1/20090.4130.3600000PSS0.4100000
5/1/20090.2930.3500000PSS0.2900000
6/1/20097.0331.6900000PSS1.2400000
7/1/20090.3231.6800000PSS0.3200000
8/1/20090.2231.6500000PSS0.2200000
9/1/20090.2831.4300000PSS0.2800000
10/1/20090.3331.4100000PSS0.3300000
11/1/20090.3131.4200000PSS0.3100000
12/1/20090.3030.2900000PSS0.3000000
1/1/20100.3130.2900000PSS0.3100000
2/1/20100.3120.3100000PSS0.3000000
3/1/20100.2630.3000000PSS0.2600000
4/1/20103.9520.9100000PSS1.5300000
7/1/20100.2521.1900000PSS0.2400000
9/1/20100.2931.5000000PSS0.2900000
10/1/20100.3330.2900000PSS0.3300000
11/1/20100.2830.2900000PSS0.2800000
12/1/20100.2930.2900000PSS0.2800000
1/1/20110.1920.2800000PSS0.1800000
2/1/20110.3330.2900000PSS0.3300000
3/1/20110.3430.2900000PSS0.3300000
4/1/20110.3230.2900000PSS0.3200000
5/1/20110.3730.3100000PSS0.3700000
1/1/20120.3930.3900000PSS0.3900000
2/1/20120.3230.3600000PSS0.3200000
3/1/20120.2930.3300000PSS0.2900000
4/1/20120.2730.3200000PSS0.2700000
5/1/20120.3110.3200000PSS0.3100000
7/1/20120.2710.2900000PSS0.2700000
8/1/20120.2610.2800000PSS0.2600000
9/1/20120.3310.2900000PSS0.3300000
10/1/20120.3610.3100000PSS0.3600000
11/1/20120.4110.3300000PSS0.4100000
12/1/20120.4110.3400000PSS0.4100000

Turbidity

Units: NTU Year
2012
Historical
period of record
High 8.10 56.40
Mean 2.28 3.32 4.97147
Low 0.50 0.50
No. of Samples 20 330

Five-year Trend Graph

      
1/1/20082.0032.0000000NTU1.8300000
2/1/20081.9831.9900000NTU1.7900000
3/1/20081.8121.9300000NTU1.7900000
4/1/20081.7131.8800000NTU1.6400000
5/1/20083.0132.1000000NTU2.1600000
6/1/20082.8232.2200000NTU2.1900000
7/1/20081.5622.1500000NTU1.5500000
8/1/20084.8032.6200000NTU4.0400000
9/1/20084.5333.0700000NTU4.2800000
10/1/20084.8333.5900000NTU4.0000000
11/1/20082.1533.4500000NTU1.8100000
12/1/20082.7033.4300000NTU2.5000000
1/1/20093.2133.7000000NTU2.4600000
2/1/20091.8233.2100000NTU1.6100000
3/1/20092.7132.9000000NTU2.3800000
4/1/20093.2532.6400000NTU2.3500000
5/1/20096.5043.3700000NTU5.3000000
6/1/20092.7333.3700000NTU2.2000000
7/1/20091.8733.1500000NTU1.7700000
8/1/20091.9133.1600000NTU1.9000000
9/1/20093.9033.3600000NTU3.7600000
10/1/20092.6233.2600000NTU2.3600000
11/1/20092.1642.5300000NTU1.8900000
12/1/20093.5432.6700000NTU2.6300000
1/1/20107.0733.5300000NTU6.7800000
2/1/20104.7334.0000000NTU4.4600000
3/1/20104.3034.0700000NTU4.2800000
4/1/20102.3034.0200000NTU2.1800000
6/1/20109.1035.5000000NTU7.0500000
7/1/20108.8735.8600000NTU6.6800000
9/1/20106.8066.7700000NTU6.1900000
10/1/20103.9037.1700000NTU3.6100000
11/1/20102.8636.3100000NTU2.5200000
12/1/20105.0735.5000000NTU4.2300000
1/1/201127.2739.1800000NTU20.7800000
2/1/20113.4338.2200000NTU3.2500000
3/1/20113.2037.6200000NTU2.9000000
4/1/20111.4037.2100000NTU1.3500000
5/1/20111.9637.0600000NTU1.8200000
6/1/20113.7336.8300000NTU3.4100000
7/1/20112.1432.6400000NTU1.7600000
8/1/20114.4332.8100000NTU4.1600000
9/1/20112.0432.6200000NTU1.8600000
10/1/20112.3232.7700000NTU2.2400000
11/1/20116.1433.4700000NTU2.7500000
12/1/20113.2333.3800000NTU2.1300000
1/1/20122.7033.4800000NTU1.9400000
2/1/20125.1033.5900000NTU4.5900000
3/1/20122.3333.6400000NTU2.0800000
4/1/20121.9833.5800000NTU1.7900000
5/1/20120.5012.6400000NTU0.5000000
6/1/20124.5012.8500000NTU4.5000000
7/1/20122.1012.7500000NTU2.1000000
8/1/20123.2012.4400000NTU3.2000000
9/1/20121.6012.3100000NTU1.6000000
10/1/20124.4012.7200000NTU4.4000000
11/1/20122.2013.0000000NTU2.2000000
12/1/20121.7012.5300000NTU1.7000000
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:
  • 1936
Caution

Chlorophyll a

Score: Caution
Units: mg/l Year
2012
Historical
period of record
High 0.1 0.1
Mean 0.0154 0.0101 0.02405815
Low 0.0075 0.0005
No. of Samples 8 59

Five-year Trend Graph

     
1/1/200817.2030.0172000mg/l0.0113400
2/1/20080.6010.0089000mg/l0.0006000
3/1/200815.7330.0111800mg/l0.0128000
4/1/200810.7030.0110600mg/l0.0078200
5/1/20087.3310.0103100mg/l0.0073300
6/1/200851.5020.0171800mg/l0.0415000
7/1/200820.0020.0176400mg/l0.0196000
9/1/200896.0020.0371100mg/l0.0929500
10/1/200854.5020.0458700mg/l0.0539800
5/1/20127.8510.0078500mg/l0.0078500
6/1/201212.3010.0100800mg/l0.0123000
7/1/201225.3010.0151500mg/l0.0253000
8/1/20128.4410.0134700mg/l0.0084400
9/1/20127.9710.0123700mg/l0.0079700
10/1/201298.5010.0267300mg/l0.0985000
11/1/20127.4810.0266700mg/l0.0074800
12/1/201225.9010.0289300mg/l0.0259000
Target
mg/l
Threshold
0.011 mg/l
 

Nitrogen, Total

We were unable to determine a trend for the data available.
Score:  
Units: mg/l Year
2012
Historical
period of record
High 1.4 7.0
Mean 0.7879 1.3666 1.68548684
Low 0.451 0.198
No. of Samples 8 88

Five-year Trend Graph

     
1/1/2008815.6730.8156700mg/l0.7167100
2/1/2008388.0010.6018400mg/l0.3880000
3/1/2008819.6730.6744500mg/l0.7390500
4/1/20081034.6730.7645000mg/l1.0036700
5/1/2008277.0010.6670000mg/l0.2770000
6/1/20081125.5020.7434200mg/l1.1110900
7/1/20081077.5020.7870600mg/l1.0756900
9/1/20081471.0020.9971300mg/l1.4642300
10/1/20081299.0021.0500000mg/l1.2986300
5/1/2012451.0010.4510000mg/l0.4510000
6/1/20121390.0010.9205000mg/l1.3900000
7/1/2012892.0010.9110000mg/l0.8920000
8/1/2012909.0010.9105000mg/l0.9090000
9/1/2012690.0010.8664000mg/l0.6900000
10/1/2012870.0010.8670000mg/l0.8700000
11/1/2012657.0010.9013300mg/l0.6570000
12/1/2012741.0010.7931700mg/l0.7410000
 

Phosphorus, Total

We were unable to determine a trend for the data available.
Score:  
Units: mg/l Year
2012
Historical
period of record
High 0.3 2.0
Mean 0.2042 0.3827 0.50492429
Low 0.15 0.04
No. of Samples 8 101

Five-year Trend Graph

     
1/1/2008145.0020.1450000mg/l0.1428300
2/1/2008189.0010.1670000mg/l0.1890000
3/1/2008235.6730.1898900mg/l0.2339500
4/1/2008172.0030.1854200mg/l0.1655300
5/1/2008131.0010.1745300mg/l0.1310000
6/1/2008305.0020.1962800mg/l0.3000000
7/1/2008370.0020.2337800mg/l0.3612500
9/1/2008290.0020.2536000mg/l0.2900000
10/1/2008375.0020.2942000mg/l0.3722900
5/1/2012150.0010.1500000mg/l0.1500000
6/1/2012214.0010.1820000mg/l0.2140000
7/1/2012155.0010.1730000mg/l0.1550000
8/1/2012290.0010.2022500mg/l0.2900000
9/1/2012245.0010.2108000mg/l0.2450000
10/1/2012325.0010.2298300mg/l0.3250000
11/1/2012169.0010.2330000mg/l0.1690000
12/1/2012156.0010.2233300mg/l0.1560000
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 110.5 381.3
Mean 53.41 50.55 37.07665
Low 8.00 0.00
No. of Samples 7 211

Five-year Trend Graph

     
1/1/200862.30362.3000000percent (%)58.1500000
2/1/200828.70145.5000000percent (%)28.7000000
3/1/200834.63341.8800000percent (%)31.0300000
4/1/200862.70347.0800000percent (%)52.8600000
5/1/200872.60152.1900000percent (%)72.6000000
6/1/200835.45249.4000000percent (%)35.1800000
7/1/200880.80252.4800000percent (%)80.3200000
9/1/200868.75464.0600000percent (%)66.8500000
10/1/200850.85261.6900000percent (%)49.0700000
5/1/20128.0018.0000000percent (%)8.0000000
7/1/201265.20136.6000000percent (%)65.2000000
8/1/201257.60143.6000000percent (%)57.6000000
9/1/201248.80144.9000000percent (%)48.8000000
10/1/201288.70153.6600000percent (%)88.7000000
11/1/201286.30169.3200000percent (%)86.3000000
12/1/2012110.50176.1800000percent (%)110.5000000
Target
percent (%)
Threshold
56.00 percent (%)

Oysters

Units: Year
2012
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

     

Rainfall

Units: inches Year
2012
Historical
period of record
High 42.1 54.5
Mean 11.4111515969788
Low 14.17
No. of Samples 356 4,832

Five-year Trend Graph

     
1/1/20081.89311.8900000inches1.8900000
2/1/20082.16292.1600000inches2.1600000
3/1/20083.02313.0200000inches3.0200000
4/1/20082.62302.6200000inches2.6200000
5/1/20081.86311.8600000inches1.8600000
6/1/20083.91303.9100000inches3.9100000
7/1/20086.83316.8300000inches6.8300000
8/1/20086.03316.0300000inches6.0300000
9/1/20084.26304.2600000inches4.2600000
10/1/20081.63311.6300000inches1.6300000
11/1/20080.69300.6900000inches0.6900000
12/1/20081.43301.4300000inches1.4300000
1/1/20091.56321.5600000inches1.5600000
2/1/20090.56280.5600000inches0.5600000
3/1/20091.22311.2200000inches1.2200000
4/1/20091.64301.6400000inches1.6400000
5/1/20094.54314.5400000inches4.5400000
6/1/20094.21304.2100000inches4.2100000
7/1/20095.75315.7500000inches5.7500000
8/1/20094.99314.9900000inches4.9900000
9/1/20098.83308.8300000inches8.8300000
10/1/20091.00311.0000000inches1.0000000
11/1/20091.53301.5300000inches1.5300000
12/1/20093.03313.0300000inches3.0300000
1/1/20103.95313.9500000inches3.9500000
2/1/20102.11282.1100000inches2.1100000
3/1/20105.09315.0900000inches5.0900000
4/1/20101.38301.3800000inches1.3800000
5/1/20100.87310.8700000inches0.8700000
6/1/20106.31306.3100000inches6.3100000
7/1/20105.45315.4500000inches5.4500000
8/1/201012.113112.1100000inches12.1100000
9/1/20102.24302.2400000inches2.2400000
10/1/20100.01310.0100000inches0.0100000
11/1/20102.77302.7700000inches2.7700000
12/1/20100.86310.8600000inches0.8600000
1/1/20112.83312.8300000inches2.8300000
2/1/20110.73280.7300000inches0.7300000
3/1/20115.81315.8100000inches5.8100000
4/1/20111.49301.4900000inches1.4900000
5/1/20112.21312.2100000inches2.2100000
6/1/20113.24303.2400000inches3.2400000
7/1/20118.71318.7100000inches8.7100000
8/1/20117.69317.6900000inches7.6900000
9/1/20114.01304.0100000inches4.0100000
10/1/20111.88301.8800000inches1.8800000
11/1/20111.10301.1000000inches1.1000000
12/1/20110.16290.1600000inches0.1600000
1/1/20120.67290.6700000inches0.6700000
2/1/20121.05291.0500000inches1.0500000
3/1/20121.67311.6700000inches1.6700000
4/1/20122.57242.5700000inches2.5700000
5/1/20121.86311.8600000inches1.8600000
6/1/201215.043015.0400000inches15.0400000
7/1/20124.59314.5900000inches4.5900000
8/1/20128.33318.3300000inches8.3300000
9/1/20122.20302.2000000inches2.2000000
10/1/20122.49312.4900000inches2.4900000
11/1/20120.00280.0000000inches0.0000000
12/1/20121.59311.5900000inches1.5900000
Target
inches
Threshold
inches

Salinity

Units: PSS Year
2012
Historical
period of record
High 35.2 45.0
Mean 28.54 5.6 15.4286
Low 16.11 0.00
No. of Samples 9 2,766

Five-year Trend Graph

     
1/1/200829.64329.6400000PSS29.3200000
2/1/200835.46132.5500000PSS35.4600000
3/1/200834.53333.2100000PSS34.5000000
4/1/200833.72333.3400000PSS33.6600000
5/1/200836.95134.0600000PSS36.9500000
6/1/200834.79434.1800000PSS34.7400000
7/1/200822.15232.9300000PSS19.2000000
9/1/200824.24630.3700000PSS19.8200000
10/1/200834.90230.6100000PSS34.8900000
2/1/200936.80231.9800000PSS36.8000000
8/1/200937.55237.5500000PSS37.5500000
9/1/200937.30237.4300000PSS37.3000000
10/1/200935.88636.9100000PSS35.8500000
12/1/200926.65234.3500000PSS26.1900000
2/1/201030.70232.6300000PSS30.7000000
3/1/201030.50230.9300000PSS30.5000000
4/1/201030.40229.5600000PSS30.4000000
5/1/201035.95230.8400000PSS35.9500000
7/1/201032.00231.9100000PSS32.0000000
9/1/201032.52632.7200000PSS32.4300000
11/1/201037.25233.9200000PSS37.2500000
2/1/201130.80233.5200000PSS30.8000000
3/1/201132.40233.4800000PSS32.4000000
4/1/201131.10232.8900000PSS31.1000000
9/1/201131.47631.2900000PSS31.4000000
10/1/201133.90232.6900000PSS33.9000000
5/1/201234.89334.8900000PSS34.8900000
7/1/201216.11125.5000000PSS16.1100000
8/1/201223.88124.9600000PSS23.8800000
9/1/201229.92126.2000000PSS29.9200000
10/1/201222.30125.4200000PSS22.3000000
11/1/201234.17125.2800000PSS34.1700000
12/1/201233.67126.6800000PSS33.6700000

Turbidity

Units: NTU Year
2012
Historical
period of record
High 7.5 31.3
Mean 4.47 3.54 3.49965
Low 2.80 0.62
No. of Samples 8 416

Five-year Trend Graph

     
1/1/20083.8033.8000000NTU3.4200000
2/1/20084.9014.3500000NTU4.9000000
3/1/20083.4334.0400000NTU3.3700000
4/1/20084.2334.0900000NTU3.8200000
5/1/20082.5013.7700000NTU2.5000000
6/1/20087.1034.3300000NTU5.1100000
7/1/20083.6524.3000000NTU3.6500000
9/1/20084.2734.3500000NTU4.0400000
10/1/20084.6524.4300000NTU4.6500000
2/1/20092.8013.9100000NTU2.8000000
8/1/20092.2012.2000000NTU2.2000000
9/1/20092.9012.5500000NTU2.9000000
10/1/20092.3332.4800000NTU2.3000000
12/1/20092.8012.5600000NTU2.8000000
2/1/20103.6012.9100000NTU3.6000000
3/1/20102.4012.7800000NTU2.4000000
4/1/20105.1013.4800000NTU5.1000000
5/1/20102.9013.3600000NTU2.9000000
7/1/20102.6013.3200000NTU2.6000000
9/1/20103.9733.6400000NTU3.8600000
11/1/20104.4313.6700000NTU4.4300000
2/1/20112.1013.5000000NTU2.1000000
3/1/20112.4012.9800000NTU2.4000000
4/1/20113.6013.1300000NTU3.6000000
9/1/20112.3032.9500000NTU2.2900000
10/1/20114.6013.4500000NTU4.6000000
5/1/20123.2013.2000000NTU3.2000000
6/1/20124.3013.7500000NTU4.3000000
7/1/20123.6013.7000000NTU3.6000000
8/1/20123.5013.6500000NTU3.5000000
9/1/20122.8013.4800000NTU2.8000000
10/1/20126.9014.0500000NTU6.9000000
11/1/20126.3014.5700000NTU6.3000000
12/1/20127.5015.1000000NTU7.5000000
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 »

Loading oyster site map...

Impervious Features

Whitaker 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 Whitaker Bayou Basin is covered by impervious surfaces.

Loading interactive chart...

Land Use / Land Cover

Whitaker 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 »

Loading interactive chart...

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.