Skip Navigation LinksHomeCreek ConditionsCreek Conditions Report

Whitaker Bayou Condition Report for 2015

View 2014 Report 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: 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
2015
Historical
period of record
High 0.0195 0.0595
Mean 0.0013 0.0019 0.00522642
Low 0.0003 0.00
No. of Samples 13 426

Five-year Trend Graph

      
1/1/20115.4490.0054400mg/l0.0053800
2/1/20111.2490.0033400mg/l0.0010500
3/1/20110.8890.0025200mg/l0.0007800
4/1/20111.8490.0023500mg/l0.0017200
5/1/20115.8190.0030400mg/l0.0044700
6/1/20116.2290.0035700mg/l0.0057100
7/1/20113.2390.0032000mg/l0.0026300
8/1/20118.9590.0044900mg/l0.0069800
9/1/20111.3090.0045600mg/l0.0012600
10/1/20111.9790.0045800mg/l0.0019600
11/1/20111.1490.0038000mg/l0.0010700
12/1/201121.3190.0063200mg/l0.0053100
1/1/20127.1090.0069600mg/l0.0055000
2/1/20124.8490.0062800mg/l0.0021600
3/1/20122.5290.0064800mg/l0.0019900
4/1/20122.1590.0065100mg/l0.0019400
5/1/20120.6430.0064300mg/l0.0006400
6/1/20129.6130.0044800mg/l0.0096100
7/1/20123.2030.0038300mg/l0.0032000
8/1/20123.1630.0035500mg/l0.0031600
9/1/20121.0430.0033000mg/l0.0010400
10/1/20121.6830.0032200mg/l0.0016800
11/1/20120.4130.0031800mg/l0.0004100
12/1/20120.2630.0016300mg/l0.0002600
1/1/20130.7430.0012200mg/l0.0007400
2/1/20130.5930.0007900mg/l0.0005900
3/1/20130.3130.0006700mg/l0.0003100
4/1/20130.9930.0005500mg/l0.0009900
5/1/20130.7730.0006100mg/l0.0007700
6/1/20133.0830.0010800mg/l0.0030800
7/1/20132.4930.0013700mg/l0.0024900
8/1/20133.9130.0019300mg/l0.0039100
9/1/20132.8030.0023400mg/l0.0028000
10/1/20131.1030.0023600mg/l0.0011000
11/1/20131.0920.0024100mg/l0.0010900
12/1/20130.5430.0019900mg/l0.0005400
1/1/20140.3230.0016300mg/l0.0003200
2/1/20141.3440.0012000mg/l0.0013400
3/1/20144.3840.0014600mg/l0.0043800
4/1/20143.1630.0018100mg/l0.0031600
5/1/20141.5030.0018700mg/l0.0015000
6/1/20141.1440.0019700mg/l0.0011400
7/1/20143.7940.0025500mg/l0.0037900
8/1/20142.4440.0027400mg/l0.0024400
9/1/20140.3430.0020600mg/l0.0003400
10/1/20144.8040.0023400mg/l0.0048000
11/1/20143.8540.0027300mg/l0.0038500
12/1/20141.1340.0027300mg/l0.0011300
1/1/20150.5730.0021900mg/l0.0005700
2/1/20150.7430.0019100mg/l0.0007400
3/1/20151.9630.0021800mg/l0.0019600
4/1/20150.5220.0014600mg/l0.0005200
5/1/20150.2520.0008600mg/l0.0002500
6/1/201519.5030.0039200mg/l0.0195000
7/1/20151.0420.0040000mg/l0.0010400
8/1/20150.4620.0039600mg/l0.0004600
9/1/20151.4220.0038700mg/l0.0014200
10/1/20150.3410.0038400mg/l0.0003400
11/1/20150.2510.0038400mg/l0.0002500
Target
mg/l
Threshold
0.02 mg/l
Pass

Nitrogen, Total

Score: Pass
Units: mg/l Year
2015
Historical
period of record
High 1.89 15.76
Mean 1.2212 0.9029 1.59835788
Low 0.905 0.30
No. of Samples 4 320

Five-year Trend Graph

      
1/1/20111050.3331.0503300mg/l1.0330600
2/1/2011763.0030.9066700mg/l0.7563100
3/1/2011834.0030.8824400mg/l0.8273400
4/1/2011788.6730.8590000mg/l0.7825800
5/1/2011950.0030.8772000mg/l0.9391700
6/1/20111114.6730.9167800mg/l1.0953100
7/1/20111210.0030.9433900mg/l1.0703100
8/1/20111346.0031.0405600mg/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
1/1/2013593.0010.8983300mg/l0.5930000
2/1/2013632.0010.8200000mg/l0.6320000
3/1/2013560.0010.7708300mg/l0.5600000
4/1/2013553.0010.6860000mg/l0.5530000
5/1/2013715.0010.6535000mg/l0.7150000
6/1/2013962.0010.6691700mg/l0.9620000
7/1/20131575.0010.8328300mg/l1.5750000
8/1/20131385.0010.9583300mg/l1.3850000
9/1/20131424.0011.1023300mg/l1.4240000
10/1/20131009.0011.1783300mg/l1.0090000
12/1/2013720.0011.2226000mg/l0.7200000
1/1/2014667.0021.0410000mg/l0.6670000
2/1/2014683.0020.9006000mg/l0.6830000
3/1/2014909.0020.7976000mg/l0.9090000
4/1/2014742.0010.7442000mg/l0.7420000
5/1/2014615.0010.7226700mg/l0.6150000
6/1/2014820.0010.7393300mg/l0.8200000
7/1/2014782.0010.7585000mg/l0.7820000
8/1/2014664.0010.7553300mg/l0.6640000
9/1/20141093.0010.7860000mg/l1.0930000
10/1/20141476.0020.9083300mg/l1.4760000
11/1/20141141.0020.9960000mg/l1.1410000
12/1/2014847.0021.0005000mg/l0.8470000
1/1/20151124.0011.0575000mg/l1.1240000
2/1/20151157.0011.1396700mg/l1.1570000
3/1/20151890.0011.2725000mg/l1.8900000
6/1/2015905.0011.2690000mg/l0.9050000
Pass

Phosphorus, Total

Score: Pass
Units: mg/l Year
2015
Historical
period of record
High 0.519 2.38
Mean 0.2631 0.3067 0.22522971
Low 0.13 0.082
No. of Samples 13 444

Five-year Trend Graph

      
1/1/2011515.3390.5153300mg/l0.4822300
2/1/2011227.3390.3713300mg/l0.2234000
3/1/2011297.3390.3466600mg/l0.2952700
4/1/2011324.6790.3411700mg/l0.2995000
5/1/2011607.6790.3944700mg/l0.5862300
6/1/2011602.3390.4291100mg/l0.5966000
7/1/2011335.0090.3990600mg/l0.3332000
8/1/2011455.3390.4370600mg/l0.4496300
9/1/2011240.6790.4276100mg/l0.2369500
10/1/2011242.3390.4138900mg/l0.2358300
11/1/2011249.0090.3541100mg/l0.2467900
12/1/2011445.0090.3278900mg/l0.3453500
1/1/2012351.0090.3305600mg/l0.2833100
2/1/2012313.6790.3069500mg/l0.2978100
3/1/2012345.6790.3244500mg/l0.3303100
4/1/2012469.6790.3623400mg/l0.4431100
5/1/2012948.0030.4788400mg/l0.9480000
6/1/2012317.0030.4575000mg/l0.3170000
7/1/2012390.0030.4640000mg/l0.3900000
8/1/2012370.0030.4733900mg/l0.3700000
9/1/2012253.0030.4579500mg/l0.2530000
10/1/2012255.0030.4221700mg/l0.2550000
11/1/2012158.0030.2905000mg/l0.1580000
12/1/2012205.0030.2718300mg/l0.2050000
1/1/2013205.0030.2410000mg/l0.2050000
2/1/2013307.0030.2305000mg/l0.3070000
3/1/2013386.0030.2526700mg/l0.3860000
4/1/2013356.0030.2695000mg/l0.3560000
5/1/2013518.0030.3295000mg/l0.5180000
6/1/2013361.0030.3555000mg/l0.3610000
7/1/2013343.0030.3785000mg/l0.3430000
8/1/2013406.0030.3950000mg/l0.4060000
9/1/2013395.0030.3965000mg/l0.3950000
10/1/2013245.0030.3780000mg/l0.2450000
11/1/2013188.0020.3230000mg/l0.1880000
12/1/2013166.0030.2905000mg/l0.1660000
1/1/2014136.0040.2560000mg/l0.1360000
2/1/2014248.0040.2296700mg/l0.2480000
3/1/2014285.0040.2113300mg/l0.2850000
4/1/2014260.0030.2138300mg/l0.2600000
5/1/2014227.0030.2203300mg/l0.2270000
6/1/2014350.0040.2510000mg/l0.3500000
7/1/2014748.0040.3530000mg/l0.7480000
8/1/2014777.0040.4411700mg/l0.7770000
9/1/2014466.0040.4713300mg/l0.4660000
10/1/2014195.0040.4605000mg/l0.1950000
11/1/2014149.0040.4475000mg/l0.1490000
12/1/2014143.0040.4130000mg/l0.1430000
1/1/2015325.0030.3425000mg/l0.3250000
2/1/2015130.0030.2346700mg/l0.1300000
3/1/2015519.0030.2435000mg/l0.5190000
4/1/2015283.0020.2581700mg/l0.2830000
5/1/2015403.0020.3005000mg/l0.4030000
6/1/2015299.0030.3265000mg/l0.2990000
7/1/2015211.0020.3075000mg/l0.2110000
8/1/2015172.0020.3145000mg/l0.1720000
9/1/2015163.0020.2551700mg/l0.1630000
10/1/2015223.0010.2451700mg/l0.2230000
11/1/2015182.0010.2083300mg/l0.1820000
Target
mg/l
Threshold
0.49 mg/l
Pass

Dissolved Oxygen Saturation

Note: Low DO saturation also may be naturally influenced by inflows from nearby wetlands or groundwater sources.
Score: Pass
Units: percent (%) Year
2015
Historical
period of record
High 87.10 262.30
Mean 74.31 77.03 41.18171
Low 67.80 7.0588
No. of Samples 8 450

Five-year Trend Graph

      
1/1/201181.80681.8000000percent (%)81.7300000
2/1/2011137.439109.6200000percent (%)133.7700000
3/1/2011119.609112.9400000percent (%)109.4800000
4/1/2011159.079124.4800000percent (%)155.2200000
5/1/201194.239118.4300000percent (%)92.9400000
1/1/201274.13974.1300000percent (%)64.3300000
2/1/201298.47986.3000000percent (%)91.7600000
3/1/2012154.279108.9600000percent (%)106.2000000
4/1/2012130.979114.4600000percent (%)126.9800000
5/1/2012106.903112.9500000percent (%)106.9000000
7/1/201275.503113.2200000percent (%)75.5000000
8/1/201262.303105.9900000percent (%)62.3000000
9/1/201268.10388.7500000percent (%)68.1000000
10/1/201290.50380.6600000percent (%)90.5000000
11/1/201296.20378.5200000percent (%)96.2000000
12/1/2012103.30382.6500000percent (%)103.3000000
1/1/2013106.80387.8700000percent (%)106.8000000
2/1/201376.80390.2800000percent (%)76.8000000
3/1/2013150.603104.0300000percent (%)150.6000000
4/1/201377.503101.8700000percent (%)77.5000000
5/1/201393.403101.4000000percent (%)93.4000000
6/1/201348.70392.3000000percent (%)48.7000000
7/1/201368.80385.9700000percent (%)68.8000000
8/1/201383.20387.0300000percent (%)83.2000000
9/1/201392.00377.2700000percent (%)92.0000000
10/1/201395.40380.2500000percent (%)95.4000000
12/1/2013105.00388.8800000percent (%)105.0000000
1/1/2014103.10495.7400000percent (%)103.1000000
2/1/2014154.704110.0400000percent (%)154.7000000
3/1/201492.504110.1400000percent (%)92.5000000
4/1/201493.204109.7000000percent (%)93.2000000
5/1/2014118.404111.1500000percent (%)118.4000000
6/1/201499.404110.2200000percent (%)99.4000000
7/1/2014174.404122.1000000percent (%)174.4000000
8/1/2014158.804122.7800000percent (%)158.8000000
9/1/201470.804119.1700000percent (%)70.8000000
10/1/201463.704114.2500000percent (%)63.7000000
11/1/201478.004107.5200000percent (%)78.0000000
12/1/2014156.904117.1000000percent (%)156.9000000
1/1/201587.103102.5500000percent (%)87.1000000
2/1/201574.10388.4300000percent (%)74.1000000
3/1/201567.80387.9300000percent (%)67.8000000
6/1/201569.70374.6800000percent (%)69.7000000
7/1/201569.90170.3800000percent (%)69.9000000
8/1/201536.00160.8500000percent (%)36.0000000
9/1/201591.90166.8800000percent (%)91.9000000
10/1/201572.20167.9400000percent (%)72.2000000
11/1/201577.30169.5000000percent (%)77.3000000
Target
percent (%)
Threshold
38.00 percent (%)

Rainfall

Units: inches Year
2015
Historical
period of record
High 34.33 55.94
Mean 12.1356104814814
Low 14.17
No. of Samples 365 4,894

Five-year Trend Graph

      
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
1/1/20130.17310.1700000inches0.1700000
2/1/20131.06231.0600000inches1.0600000
3/1/20130.81300.8100000inches0.8100000
4/1/20133.43303.4300000inches3.4300000
5/1/20132.93312.9300000inches2.9300000
6/1/20137.39307.3900000inches7.3900000
7/1/201311.003111.0000000inches11.0000000
8/1/201310.603110.6000000inches10.6000000
9/1/201315.013015.0100000inches15.0100000
10/1/20130.96310.9600000inches0.9600000
11/1/20130.91300.9100000inches0.9100000
12/1/20130.20310.2000000inches0.2000000
1/1/20142.55312.5500000inches2.5500000
2/1/20142.36282.3600000inches2.3600000
3/1/20145.96315.9600000inches5.9600000
4/1/20140.97290.9700000inches0.9700000
5/1/20145.40315.4000000inches5.4000000
6/1/20143.66303.6600000inches3.6600000
7/1/20142.01312.0100000inches2.0100000
8/1/20143.71283.7100000inches3.7100000
9/1/20148.19268.1900000inches8.1900000
10/1/20142.22302.2200000inches2.2200000
11/1/20144.09304.0900000inches4.0900000
12/1/20140.50310.5000000inches0.5000000
1/1/20150.78310.7800000inches0.7800000
2/1/20153.64283.6400000inches3.6400000
3/1/20150.97310.9700000inches0.9700000
4/1/20151.50301.5000000inches1.5000000
5/1/20152.94312.9400000inches2.9400000
6/1/20152.73302.7300000inches2.7300000
7/1/20155.90315.9000000inches5.9000000
8/1/20155.31315.3100000inches5.3100000
9/1/20156.17306.1700000inches6.1700000
10/1/20151.48311.4800000inches1.4800000
11/1/20150.73300.7300000inches0.7300000
12/1/20152.18312.1800000inches2.1800000
Target
inches
Threshold
inches

Salinity

Units: PSS Year
2015
Historical
period of record
High 0.63 20.48
Mean 0.49 0.4 1.00759
Low 0.35 0.00
No. of Samples 8 587

Five-year Trend Graph

      
1/1/20110.1960.1900000PSS0.1800000
2/1/20110.3390.2600000PSS0.3300000
3/1/20110.3490.2900000PSS0.3300000
4/1/20110.3290.3000000PSS0.3200000
5/1/20110.3790.3100000PSS0.3700000
1/1/20120.3990.3900000PSS0.3900000
2/1/20120.3290.3600000PSS0.3200000
3/1/20120.2990.3300000PSS0.2900000
4/1/20120.2790.3200000PSS0.2700000
5/1/20120.3130.3200000PSS0.3100000
7/1/20120.2730.2900000PSS0.2700000
8/1/20120.2630.2800000PSS0.2600000
9/1/20120.3330.2900000PSS0.3300000
10/1/20120.3630.3100000PSS0.3600000
11/1/20120.4130.3300000PSS0.4100000
12/1/20120.4130.3400000PSS0.4100000
1/1/20130.4430.3700000PSS0.4400000
2/1/20130.3430.3800000PSS0.3400000
3/1/20130.4030.3900000PSS0.4000000
4/1/20130.4130.4000000PSS0.4100000
5/1/20130.3330.3900000PSS0.3300000
6/1/20130.2130.3600000PSS0.2100000
7/1/20130.2930.3300000PSS0.2900000
8/1/20130.2530.3200000PSS0.2500000
9/1/20130.2930.3000000PSS0.2900000
10/1/20130.3330.2800000PSS0.3300000
12/1/20130.4030.3100000PSS0.4000000
1/1/20140.3940.3300000PSS0.3900000
2/1/20140.3340.3500000PSS0.3300000
3/1/20140.2040.3300000PSS0.2000000
4/1/20140.3840.3400000PSS0.3800000
5/1/20140.2940.3300000PSS0.2900000
6/1/20140.3640.3300000PSS0.3600000
7/1/20140.2740.3100000PSS0.2700000
8/1/20140.3040.3000000PSS0.3000000
9/1/20140.4640.3400000PSS0.4600000
10/1/20140.2840.3300000PSS0.2800000
11/1/20140.3140.3300000PSS0.3100000
12/1/20140.3640.3300000PSS0.3600000
1/1/20150.6330.3900000PSS0.6300000
2/1/20150.4330.4100000PSS0.4300000
3/1/20150.3530.3900000PSS0.3500000
6/1/20150.5930.5000000PSS0.5900000
7/1/20150.1510.3800000PSS0.1500000
8/1/20150.3310.3600000PSS0.3300000
9/1/20150.3110.3500000PSS0.3100000
10/1/20150.4910.3700000PSS0.4900000
11/1/20150.5610.4100000PSS0.5600000

Turbidity

Units: NTU Year
2015
Historical
period of record
High 8.30 56.40
Mean 1.61 3.04 5.11954
Low 0.64 0.50
No. of Samples 13 510

Five-year Trend Graph

      
1/1/201127.27927.2700000NTU20.7800000
2/1/20113.43915.3500000NTU3.2500000
3/1/20113.20911.3000000NTU2.9000000
4/1/20111.4098.8300000NTU1.3500000
5/1/20111.9697.4500000NTU1.8200000
6/1/20113.7396.8300000NTU3.4100000
7/1/20112.1492.6400000NTU1.7600000
8/1/20114.4392.8100000NTU4.1600000
9/1/20112.0492.6200000NTU1.8600000
10/1/20112.3292.7700000NTU2.2400000
11/1/20116.1493.4700000NTU2.7500000
12/1/20113.2393.3800000NTU2.1300000
1/1/20122.7093.4800000NTU1.9400000
2/1/20125.1093.5900000NTU4.5900000
3/1/20122.3393.6400000NTU2.0800000
4/1/20121.9893.5800000NTU1.7900000
5/1/20120.5032.6400000NTU0.5000000
6/1/20124.5032.8500000NTU4.5000000
7/1/20122.1032.7500000NTU2.1000000
8/1/20123.2032.4400000NTU3.2000000
9/1/20121.6032.3100000NTU1.6000000
10/1/20124.4032.7200000NTU4.4000000
11/1/20122.2033.0000000NTU2.2000000
12/1/20121.7032.5300000NTU1.7000000
1/1/20131.6032.4500000NTU1.6000000
2/1/20131.4032.1500000NTU1.4000000
3/1/20130.8032.0200000NTU0.8000000
4/1/20130.8031.4200000NTU0.8000000
5/1/20131.2031.2500000NTU1.2000000
6/1/20132.2031.3300000NTU2.2000000
7/1/20135.1031.9200000NTU5.1000000
8/1/20134.2032.3800000NTU4.2000000
9/1/20135.2033.1200000NTU5.2000000
10/1/20132.7033.4300000NTU2.7000000
11/1/20132.2023.6000000NTU2.2000000
12/1/20131.3033.4500000NTU1.3000000
1/1/20141.1042.7800000NTU1.1000000
2/1/20141.7042.3700000NTU1.7000000
3/1/20148.0042.8300000NTU8.0000000
4/1/20141.5032.6300000NTU1.5000000
5/1/20141.2032.4700000NTU1.2000000
6/1/20141.1042.4300000NTU1.1000000
7/1/20142.5042.6700000NTU2.5000000
8/1/20141.1042.5700000NTU1.1000000
9/1/20141.8041.5300000NTU1.8000000
10/1/20141.6041.5500000NTU1.6000000
11/1/20141.1041.5300000NTU1.1000000
12/1/20141.9041.6700000NTU1.9000000
1/1/20152.1031.6000000NTU2.1000000
2/1/20150.6631.5300000NTU0.6600000
3/1/20158.3032.6100000NTU8.3000000
4/1/20150.6422.4500000NTU0.6400000
5/1/20151.2022.4700000NTU1.2000000
6/1/20151.2032.3500000NTU1.2000000
7/1/20154.3022.7200000NTU4.3000000
8/1/20151.2022.8100000NTU1.2000000
9/1/20150.6521.5300000NTU0.6500000
10/1/20151.2011.6300000NTU1.2000000
11/1/20151.7011.7100000NTU1.7000000
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
Pass

Chlorophyll a

Score: Pass
Units: mg/l Year
2015
Historical
period of record
High 0.1 0.1
Mean 0.0086 0.012 0.02282979
Low 0.0004 0.0004
No. of Samples 13 137

Five-year Trend Graph

     
5/1/20127.8530.0078500mg/l0.0078500
6/1/201212.3030.0100800mg/l0.0123000
7/1/201225.3030.0151500mg/l0.0253000
8/1/20128.4430.0134700mg/l0.0084400
9/1/20127.9730.0123700mg/l0.0079700
10/1/201298.5030.0267300mg/l0.0985000
11/1/20127.4830.0266700mg/l0.0074800
12/1/201225.9030.0289300mg/l0.0259000
1/1/20138.9330.0262000mg/l0.0089300
2/1/201314.3030.0271800mg/l0.0143000
3/1/20134.5430.0266100mg/l0.0045400
4/1/201366.4030.0212600mg/l0.0664000
5/1/201319.1030.0232000mg/l0.0191000
6/1/201347.2030.0267500mg/l0.0472000
7/1/20137.8330.0265600mg/l0.0078300
8/1/201316.6030.0269500mg/l0.0166000
9/1/201315.9030.0288400mg/l0.0159000
10/1/201323.5030.0216900mg/l0.0235000
11/1/201334.7020.0242900mg/l0.0347000
12/1/201313.9030.0187400mg/l0.0139000
1/1/20146.5640.0185300mg/l0.0065600
2/1/20147.4740.0170100mg/l0.0074700
3/1/20146.8340.0154900mg/l0.0068300
4/1/20145.8230.0125500mg/l0.0058200
5/1/201426.7030.0112100mg/l0.0267000
6/1/201429.5040.0138100mg/l0.0295000
7/1/201427.6040.0173200mg/l0.0276000
8/1/20148.0640.0174200mg/l0.0080600
9/1/201435.7040.0222300mg/l0.0357000
10/1/201423.3040.0251400mg/l0.0233000
11/1/201414.1040.0230400mg/l0.0141000
12/1/20149.8440.0197700mg/l0.0098400
1/1/20156.7130.0162900mg/l0.0067100
2/1/20154.8330.0157500mg/l0.0048300
3/1/201531.7030.0150800mg/l0.0317000
4/1/201515.8020.0138300mg/l0.0158000
5/1/20157.7120.0127700mg/l0.0077100
6/1/20150.3830.0111900mg/l0.0003800
7/1/20155.8120.0110400mg/l0.0058100
8/1/2015106.0020.0279000mg/l0.1060000
9/1/2015117.0020.0421200mg/l0.1170000
10/1/201539.1010.0460000mg/l0.0391000
11/1/201543.7010.0520000mg/l0.0437000
Target
mg/l
Threshold
0.011 mg/l

Nitrogen, Total

We were unable to determine a trend for the data available.
Units: mg/l Year
2015
Historical
period of record
High 1.0 7.0
Mean 0.8178 1.1527 1.52443185
Low 0.63 0.054
No. of Samples 4 122

Five-year Trend Graph

     
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
1/1/2013471.0010.7230000mg/l0.4710000
2/1/2013838.0010.7111700mg/l0.8380000
3/1/2013371.0010.6580000mg/l0.3710000
4/1/20131064.0010.6903300mg/l1.0640000
5/1/2013855.0010.7233300mg/l0.8550000
6/1/2013994.0010.7655000mg/l0.9940000
7/1/2013949.0010.8451700mg/l0.9490000
8/1/20131055.0010.8813300mg/l1.0550000
9/1/20131476.0011.0655000mg/l1.4760000
10/1/2013999.0011.0546700mg/l0.9990000
12/1/2013874.0011.0706000mg/l0.8740000
1/1/2014572.0020.9952000mg/l0.5720000
2/1/2014562.0020.8966000mg/l0.5620000
3/1/2014544.0020.7102000mg/l0.5440000
4/1/2014367.0010.5838000mg/l0.3670000
5/1/2014377.0010.5493300mg/l0.3770000
6/1/2014570.0010.4986700mg/l0.5700000
7/1/2014728.0010.5246700mg/l0.7280000
8/1/20141076.0010.6103300mg/l1.0760000
9/1/20141675.0010.7988300mg/l1.6750000
10/1/20141475.0020.9835000mg/l1.4750000
11/1/20141111.0021.1058300mg/l1.1110000
12/1/20141028.0021.1821700mg/l1.0280000
1/1/2015755.0011.1866700mg/l0.7550000
2/1/2015630.0011.1123300mg/l0.6300000
3/1/20151030.0011.0048300mg/l1.0300000
6/1/2015913.0010.8320000mg/l0.9130000

Phosphorus, Total

We were unable to determine a trend for the data available.
Units: mg/l Year
2015
Historical
period of record
High 0.3 2.0
Mean 0.1155 0.2637 0.42962978
Low 0.081 0.038
No. of Samples 13 184

Five-year Trend Graph

     
5/1/2012150.0030.1500000mg/l0.1500000
6/1/2012214.0030.1820000mg/l0.2140000
7/1/2012155.0030.1730000mg/l0.1550000
8/1/2012290.0030.2022500mg/l0.2900000
9/1/2012245.0030.2108000mg/l0.2450000
10/1/2012325.0030.2298300mg/l0.3250000
11/1/2012169.0030.2330000mg/l0.1690000
12/1/2012156.0030.2233300mg/l0.1560000
1/1/201374.0030.2098300mg/l0.0740000
2/1/2013151.0030.1866700mg/l0.1510000
3/1/201338.0030.1521700mg/l0.0380000
4/1/2013303.0030.1485000mg/l0.3030000
5/1/2013230.0030.1586700mg/l0.2300000
6/1/2013267.0030.1771700mg/l0.2670000
7/1/2013209.0030.1996700mg/l0.2090000
8/1/2013190.0030.2061700mg/l0.1900000
9/1/2013227.0030.2376700mg/l0.2270000
10/1/2013208.0030.2218300mg/l0.2080000
11/1/2013167.0020.2113300mg/l0.1670000
12/1/2013187.0030.1980000mg/l0.1870000
1/1/2014141.0040.1866700mg/l0.1410000
2/1/2014155.0040.1808300mg/l0.1550000
3/1/2014171.0040.1715000mg/l0.1710000
4/1/201441.0030.1436700mg/l0.0410000
5/1/201490.0030.1308300mg/l0.0900000
6/1/201484.0040.1136700mg/l0.0840000
7/1/2014441.0040.1636700mg/l0.4410000
8/1/2014929.0040.2926700mg/l0.9290000
9/1/2014508.0040.3488300mg/l0.5080000
10/1/2014361.0040.4021700mg/l0.3610000
11/1/2014199.0040.4203300mg/l0.1990000
12/1/2014164.0040.4336700mg/l0.1640000
1/1/2015113.0030.3790000mg/l0.1130000
2/1/201582.0030.2378300mg/l0.0820000
3/1/2015137.0030.1760000mg/l0.1370000
4/1/201582.0020.1295000mg/l0.0820000
5/1/201590.0020.1113300mg/l0.0900000
6/1/201581.0030.0975000mg/l0.0810000
7/1/2015285.0020.1261700mg/l0.2850000
8/1/2015164.0020.1398300mg/l0.1640000
9/1/2015178.0020.1466700mg/l0.1780000
10/1/2015123.0010.1535000mg/l0.1230000
11/1/2015117.0010.1580000mg/l0.1170000
Target
mg/l
Threshold
mg/l
Pass

Dissolved Oxygen Saturation

Note: Low DO saturation also may be naturally influenced by inflows from nearby wetlands or groundwater sources
Score: Pass
Units: percent (%) Year
2015
Historical
period of record
High 104.6 381.3
Mean 85.94 53.06 34.67586
Low 70.20 0.00
No. of Samples 8 282

Five-year Trend Graph

     
5/1/20128.0038.0000000percent (%)8.0000000
7/1/201265.20336.6000000percent (%)65.2000000
8/1/201257.60343.6000000percent (%)57.6000000
9/1/201248.80344.9000000percent (%)48.8000000
10/1/201288.70353.6600000percent (%)88.7000000
11/1/201286.30369.3200000percent (%)86.3000000
12/1/2012110.50376.1800000percent (%)110.5000000
1/1/201391.20380.5200000percent (%)91.2000000
2/1/201360.10380.9300000percent (%)60.1000000
3/1/201312.50374.8800000percent (%)12.5000000
4/1/201367.80371.4000000percent (%)67.8000000
5/1/201333.20362.5500000percent (%)33.2000000
6/1/201366.00355.1300000percent (%)66.0000000
7/1/201384.00353.9300000percent (%)84.0000000
8/1/201388.70358.7000000percent (%)88.7000000
9/1/201375.40369.1800000percent (%)75.4000000
10/1/201366.00368.8800000percent (%)66.0000000
12/1/201374.70377.7600000percent (%)74.7000000
1/1/2014111.50483.2600000percent (%)111.5000000
2/1/201484.40182.4000000percent (%)84.4000000
3/1/201477.90482.9000000percent (%)77.9000000
4/1/201469.30483.5600000percent (%)69.3000000
5/1/201479.70482.9200000percent (%)79.7000000
6/1/201440.10477.1500000percent (%)40.1000000
7/1/201453.50467.4800000percent (%)53.5000000
8/1/201461.00463.5800000percent (%)61.0000000
9/1/201413.20452.8000000percent (%)13.2000000
10/1/201453.30450.1300000percent (%)53.3000000
11/1/201471.00448.6800000percent (%)71.0000000
12/1/201495.10457.8500000percent (%)95.1000000
1/1/2015104.60366.3700000percent (%)104.6000000
2/1/201591.70371.4800000percent (%)91.7000000
3/1/201570.20380.9800000percent (%)70.2000000
6/1/201581.00386.8800000percent (%)81.0000000
7/1/201530.30168.3000000percent (%)30.3000000
8/1/201587.00167.1300000percent (%)87.0000000
9/1/2015122.30180.1500000percent (%)122.3000000
10/1/201559.20175.9600000percent (%)59.2000000
11/1/2015111.50181.8800000percent (%)111.5000000
Target
percent (%)
Threshold
56.00 percent (%)

Oysters

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

Five-year Trend Graph

     

Rainfall

Units: inches Year
2015
Historical
period of record
High 34.3 55.9
Mean 12.1356104814814
Low 14.17
No. of Samples 365 4,894

Five-year Trend Graph

     
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
1/1/20130.17310.1700000inches0.1700000
2/1/20131.06231.0600000inches1.0600000
3/1/20130.81300.8100000inches0.8100000
4/1/20133.43303.4300000inches3.4300000
5/1/20132.93312.9300000inches2.9300000
6/1/20137.39307.3900000inches7.3900000
7/1/201311.003111.0000000inches11.0000000
8/1/201310.603110.6000000inches10.6000000
9/1/201315.013015.0100000inches15.0100000
10/1/20130.96310.9600000inches0.9600000
11/1/20130.91300.9100000inches0.9100000
12/1/20130.20310.2000000inches0.2000000
1/1/20142.55312.5500000inches2.5500000
2/1/20142.36282.3600000inches2.3600000
3/1/20145.96315.9600000inches5.9600000
4/1/20140.97290.9700000inches0.9700000
5/1/20145.40315.4000000inches5.4000000
6/1/20143.66303.6600000inches3.6600000
7/1/20142.01312.0100000inches2.0100000
8/1/20143.71283.7100000inches3.7100000
9/1/20148.19268.1900000inches8.1900000
10/1/20142.22302.2200000inches2.2200000
11/1/20144.09304.0900000inches4.0900000
12/1/20140.50310.5000000inches0.5000000
1/1/20150.78310.7800000inches0.7800000
2/1/20153.64283.6400000inches3.6400000
3/1/20150.97310.9700000inches0.9700000
4/1/20151.50301.5000000inches1.5000000
5/1/20152.94312.9400000inches2.9400000
6/1/20152.73302.7300000inches2.7300000
7/1/20155.90315.9000000inches5.9000000
8/1/20155.31315.3100000inches5.3100000
9/1/20156.17306.1700000inches6.1700000
10/1/20151.48311.4800000inches1.4800000
11/1/20150.73300.7300000inches0.7300000
12/1/20152.18312.1800000inches2.1800000
Target
inches
Threshold
inches

Salinity

Units: PSS Year
2015
Historical
period of record
High 35.3 45.0
Mean 33.71 5.83 15.37959
Low 30.76 0.00
No. of Samples 8 2,837

Five-year Trend Graph

     
2/1/201130.80230.8000000PSS30.8000000
3/1/201132.40231.6000000PSS32.4000000
4/1/201131.10231.4300000PSS31.1000000
9/1/201131.47631.2900000PSS31.4000000
10/1/201133.90232.6900000PSS33.9000000
5/1/201234.65534.6500000PSS34.6500000
7/1/201216.11325.3800000PSS16.1100000
8/1/201223.88324.8800000PSS23.8800000
9/1/201229.92326.1400000PSS29.9200000
10/1/201222.30325.3700000PSS22.3000000
11/1/201234.17325.2800000PSS34.1700000
12/1/201233.67326.6800000PSS33.6700000
1/1/201333.89329.6400000PSS33.8900000
2/1/201332.96331.1500000PSS32.9600000
3/1/201332.85331.6400000PSS32.8500000
4/1/201333.49333.5100000PSS33.4900000
5/1/201335.27333.6900000PSS35.2700000
6/1/201325.43332.3200000PSS25.4300000
7/1/201325.06330.8400000PSS25.0600000
8/1/201321.88329.0000000PSS21.8800000
9/1/201312.73325.6400000PSS12.7300000
10/1/201324.38324.1300000PSS24.3800000
12/1/201325.88321.9900000PSS25.8800000
1/1/201429.13422.8000000PSS29.1300000
2/1/201430.17124.4600000PSS30.1700000
3/1/201424.62426.8400000PSS24.6200000
4/1/201433.92428.7400000PSS33.9200000
5/1/201433.55429.5500000PSS33.5500000
6/1/201434.42430.9700000PSS34.4200000
7/1/201426.04430.4500000PSS26.0400000
8/1/201436.70431.5400000PSS36.7000000
9/1/201433.68433.0500000PSS33.6800000
10/1/201418.36430.4600000PSS18.3600000
11/1/201430.09429.8800000PSS30.0900000
12/1/201433.15429.6700000PSS33.1500000
1/1/201534.47331.0800000PSS34.4700000
2/1/201530.76330.0900000PSS30.7600000
3/1/201534.53330.2300000PSS34.5300000
6/1/201535.27333.7600000PSS35.2700000
7/1/201532.49133.2600000PSS32.4900000
8/1/201531.79133.5200000PSS31.7900000
9/1/201533.06133.1500000PSS33.0600000
10/1/201533.46133.2100000PSS33.4600000
11/1/201534.37133.4100000PSS34.3700000

Turbidity

Units: NTU Year
2015
Historical
period of record
High 7.8 31.3
Mean 4.87 3.74 3.40243
Low 3.50 0.62
No. of Samples 13 494

Five-year Trend Graph

     
2/1/20112.1012.1000000NTU2.1000000
3/1/20112.4012.2500000NTU2.4000000
4/1/20113.6012.7000000NTU3.6000000
9/1/20112.3032.9500000NTU2.2900000
10/1/20114.6013.4500000NTU4.6000000
5/1/20123.2033.2000000NTU3.2000000
6/1/20124.3033.7500000NTU4.3000000
7/1/20123.6033.7000000NTU3.6000000
8/1/20123.5033.6500000NTU3.5000000
9/1/20122.8033.4800000NTU2.8000000
10/1/20126.9034.0500000NTU6.9000000
11/1/20126.3034.5700000NTU6.3000000
12/1/20127.5035.1000000NTU7.5000000
1/1/20136.6035.6000000NTU6.6000000
2/1/20133.7035.6300000NTU3.7000000
3/1/20133.5035.7500000NTU3.5000000
4/1/20139.8036.2300000NTU9.8000000
5/1/20132.9035.6700000NTU2.9000000
6/1/20136.3035.4700000NTU6.3000000
7/1/20134.7035.1500000NTU4.7000000
8/1/20135.0035.3700000NTU5.0000000
9/1/20135.1035.6300000NTU5.1000000
10/1/20135.9034.9800000NTU5.9000000
11/1/20135.0025.3300000NTU5.0000000
12/1/20139.9035.9300000NTU9.9000000
1/1/20144.3045.8700000NTU4.3000000
2/1/20146.3046.0800000NTU6.3000000
3/1/201415.0047.7300000NTU15.0000000
4/1/20143.4037.3200000NTU3.4000000
5/1/20144.9037.3000000NTU4.9000000
6/1/20143.9046.3000000NTU3.9000000
7/1/20145.7046.5300000NTU5.7000000
8/1/20144.1046.1700000NTU4.1000000
9/1/20145.8044.6300000NTU5.8000000
10/1/20146.8045.2000000NTU6.8000000
11/1/20144.7045.1700000NTU4.7000000
12/1/20141.4044.7500000NTU1.4000000
1/1/20154.4034.5300000NTU4.4000000
2/1/20154.3034.5700000NTU4.3000000
3/1/20157.8034.9000000NTU7.8000000
4/1/20154.7024.5500000NTU4.7000000
5/1/20153.8024.4000000NTU3.8000000
6/1/20153.5034.7500000NTU3.5000000
7/1/20153.9024.6700000NTU3.9000000
8/1/20156.3025.0000000NTU6.3000000
9/1/20157.4024.9300000NTU7.4000000
10/1/20153.8014.7800000NTU3.8000000
11/1/20157.3015.3700000NTU7.3000000
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.