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North Creek Condition Report for 2015

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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: 2,327 acres
  • Location: Central Sarasota County
  • Discharges into: Little Sarasota Bay

The surface water system in the North Creek Basin has undergone significant alteration over the past century. The 1847 General Land Office Survey shows North Creek extending from Little Sarasota Bay, east across the approximately 2½-mile-wide basin to what appears to be a pond. The 1959 USDA NRCS Soil Survey shows two north-south ditches leading to North Creek. The ditch to the south leads to an area in the west that appears to be a development. With the exception of the western boundary, U.S. 41, and some ditches, the basin was still fairly undeveloped by the 1970s. By 2000, roughly half of the basin was developed and about 1,930 people resided in the developed areas (U.S. Census Bureau, 2000). Today, about 75% of the basin is developed and laden with ditches and stormwater infrastructure, with half of the development residential. For basin details see: Little 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:
  • 1984AB

Chlorophyll a

Units: mg/l Year
2015
Historical
period of record
High 0.032
Mean 0.0021 0.01169376
Low 0.0009
No. of Samples 0 9

Five-year Rolling Average Graph

      
Target
mg/l
Threshold
0.02 mg/l

Nitrogen, Total

Units: mg/l Year
2015
Historical
period of record
High 3.031
Mean 1.4041 0.59205696
Low 1.106
No. of Samples 0 9

Five-year Rolling Average Graph

      

Phosphorus, Total

Units: mg/l Year
2015
Historical
period of record
High 2.70
Mean 0.1632 0.71140806
Low 0.041
No. of Samples 0 13

Five-year Rolling Average Graph

      
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 88.00 88.00
Mean 51.46 39.49 20.69802
Low 26.00 10.70
No. of Samples 20 33

Five-year Rolling Average Graph

      
6/1/201552.43452.4300000percent (%)48.8800000
8/1/201558.00855.2200000percent (%)53.9100000
10/1/201552.25854.2300000percent (%)50.4000000
Target
percent (%)
Threshold
38.00 percent (%)

BOD, Biochemical oxygen demand

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

Five-year Rolling Average Graph

      

Color

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

Five-year Rolling Average Graph

      

Escherichia coli

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

Five-year Rolling Average Graph

      
Target
cfu/100ml
Threshold
cfu/100ml

Nitrogen, Ammonia + Ammonium as N

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

Five-year Rolling Average Graph

      

Nitrogen, Kjeldahl

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

Five-year Rolling Average Graph

      

Nitrogen, Nitrite + Nitrate as N

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

Five-year Rolling Average Graph

      

pH

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

Five-year Rolling Average Graph

      
6/1/20157.0047.0000000None7.0000000
8/1/20157.3887.1900000None7.3700000
10/1/20157.3687.2500000None7.3600000

Salinity

Units: PSS Year
2015
Historical
period of record
High 0.90 14.86
Mean 0.59 0.63 3.21752
Low 0.24 0.16
No. of Samples 20 33

Five-year Rolling Average Graph

      
6/1/20150.6940.6900000PSS0.6100000
8/1/20150.5680.6300000PSS0.5500000
10/1/20150.6380.6300000PSS0.6100000

Specific conductance

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

Five-year Rolling Average Graph

      
6/1/20151370.2541370.2500000umho1229.2900000
8/1/20151120.6381245.4400000umho1090.2300000
10/1/20151289.6381260.1700000umho1243.3400000

Temperature, water

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

Five-year Rolling Average Graph

      
6/1/201577.63477.6300000deg F77.6300000
8/1/201580.11878.8700000deg F80.0800000
10/1/201576.78878.1700000deg F76.7300000

Turbidity

Units: NTU Year
2015
Historical
period of record
High 25.10
Mean 3.67 7.11215
Low 1.40
No. of Samples 0 10

Five-year Rolling Average Graph

      
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:
  • 1984A
Caution

Chlorophyll a

Score: Caution
Units: mg/l Year
2015
Historical
period of record
High 0.1 0.1
Mean 0.0193 0.0109 0.01690038
Low 0.008 0.0009
No. of Samples 24 289

Five-year Rolling Average Graph

     
1/1/20118.7630.0087600mg/l0.0087600
2/1/201129.1030.0189300mg/l0.0291000
3/1/20115.1330.0143300mg/l0.0051300
4/1/20114.7630.0119400mg/l0.0047600
5/1/201116.6030.0128700mg/l0.0166000
6/1/201123.0030.0145600mg/l0.0230000
7/1/201156.9030.0225800mg/l0.0569000
8/1/20114.9030.0185500mg/l0.0049000
9/1/201114.1030.0200400mg/l0.0141000
10/1/201122.0030.0229200mg/l0.0220000
11/1/201116.7030.0229300mg/l0.0167000
12/1/20114.7630.0198900mg/l0.0047600
1/1/20124.6930.0111900mg/l0.0046900
2/1/20124.4730.0111200mg/l0.0044700
3/1/201215.7030.0113900mg/l0.0157000
4/1/201219.8030.0110200mg/l0.0198000
5/1/201223.0030.0120700mg/l0.0230000
6/1/20128.4830.0126900mg/l0.0084800
7/1/20128.9430.0134000mg/l0.0089400
8/1/201212.4030.0147200mg/l0.0124000
9/1/20129.5730.0137000mg/l0.0095700
10/1/20123.3530.0109600mg/l0.0033500
11/1/20123.3730.0076900mg/l0.0033700
12/1/20121.7630.0065700mg/l0.0017600
1/1/20137.8930.0063900mg/l0.0078900
2/1/20133.7730.0049500mg/l0.0037700
3/1/201311.4030.0052600mg/l0.0114000
4/1/201310.1030.0063800mg/l0.0101000
5/1/20139.8530.0074600mg/l0.0098500
6/1/201321.8030.0108000mg/l0.0218000
7/1/201319.5030.0127400mg/l0.0195000
8/1/201320.0030.0154400mg/l0.0200000
9/1/20137.3230.0147600mg/l0.0073200
10/1/20138.8830.0145600mg/l0.0088800
11/1/201384.5020.0270000mg/l0.0845000
12/1/20132.6130.0238000mg/l0.0026100
1/1/201411.7040.0225000mg/l0.0117000
2/1/20146.6840.0202800mg/l0.0066800
3/1/20145.7340.0200200mg/l0.0057300
4/1/201411.5040.0204500mg/l0.0115000
5/1/201410.5040.0081200mg/l0.0105000
6/1/201431.6040.0129500mg/l0.0316000
7/1/201425.6040.0152700mg/l0.0256000
8/1/20147.0440.0153300mg/l0.0070400
9/1/201410.1040.0160600mg/l0.0101000
10/1/20148.2540.0155200mg/l0.0082500
11/1/201410.3040.0154800mg/l0.0103000
12/1/2014104.0040.0275500mg/l0.1040000
1/1/20158.0330.0246200mg/l0.0080300
2/1/201512.8030.0255800mg/l0.0128000
3/1/201522.7030.0276800mg/l0.0227000
4/1/201538.4020.0327100mg/l0.0384000
5/1/201512.6020.0330900mg/l0.0126000
6/1/201574.4030.0281600mg/l0.0744000
7/1/201513.8020.0291200mg/l0.0138000
8/1/201534.1020.0326700mg/l0.0341000
9/1/201512.2020.0309200mg/l0.0122000
10/1/201517.2010.0273800mg/l0.0172000
11/1/201510.2010.0269800mg/l0.0102000
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 2.3 2.3
Mean 1.6124 1.277 0.34377262
Low 1.222 0.16
No. of Samples 4 176

Five-year Rolling Average Graph

     
1/1/20111274.0011.2740000mg/l1.2740000
2/1/20111513.0011.3935000mg/l1.5130000
3/1/20111093.0011.2933300mg/l1.0930000
4/1/20111256.0011.2840000mg/l1.2560000
5/1/20111381.0011.3034000mg/l1.3810000
6/1/20111629.0011.3576700mg/l1.6290000
7/1/20111037.0011.3181700mg/l1.0370000
8/1/20111272.0011.2780000mg/l1.2720000
9/1/20111501.0011.3460000mg/l1.5010000
10/1/2011820.0011.2733300mg/l0.8200000
11/1/20111335.0011.2656700mg/l1.3350000
12/1/20111225.0011.1983300mg/l1.2250000
1/1/2012989.0011.1903300mg/l0.9890000
2/1/20121213.0011.1805000mg/l1.2130000
3/1/2012951.0011.0888300mg/l0.9510000
4/1/20121059.0011.1286700mg/l1.0590000
5/1/20121430.0011.1445000mg/l1.4300000
6/1/20121239.0011.1468300mg/l1.2390000
7/1/20121472.0011.2273300mg/l1.4720000
8/1/20121293.0011.2406700mg/l1.2930000
9/1/20121611.0011.3506700mg/l1.6110000
10/1/20121448.0011.4155000mg/l1.4480000
11/1/20121140.0011.3671700mg/l1.1400000
12/1/20121348.0011.3853300mg/l1.3480000
1/1/2013956.0011.2993300mg/l0.9560000
2/1/20131304.0011.3011700mg/l1.3040000
3/1/20131476.0011.2786700mg/l1.4760000
4/1/2013907.0011.1885000mg/l0.9070000
5/1/20131612.0011.2671700mg/l1.6120000
6/1/20131792.0011.3411700mg/l1.7920000
7/1/20131590.0011.4468300mg/l1.5900000
8/1/20131520.0011.4828300mg/l1.5200000
9/1/20131502.0011.4871700mg/l1.5020000
10/1/20131448.0011.5773300mg/l1.4480000
12/1/20131713.0011.5546000mg/l1.7130000
1/1/20141437.0021.5240000mg/l1.4370000
2/1/20141339.0021.4878000mg/l1.3390000
3/1/20141111.0021.4096000mg/l1.1110000
4/1/20141383.0021.3966000mg/l1.3830000
5/1/20141197.0021.3633300mg/l1.1970000
6/1/20141681.0011.3580000mg/l1.6810000
7/1/20142193.0011.4840000mg/l2.1930000
8/1/20141251.0011.4693300mg/l1.2510000
9/1/20141794.0011.5831700mg/l1.7940000
10/1/20142083.0021.6998300mg/l2.0830000
11/1/20141555.0021.7595000mg/l1.5550000
12/1/20141402.0021.7130000mg/l1.4020000
1/1/20151338.0011.5705000mg/l1.3380000
2/1/20151222.0011.5656700mg/l1.2220000
3/1/20151791.0011.5651700mg/l1.7910000
6/1/20152308.0011.6647500mg/l2.3080000

Phosphorus, Total

We were unable to determine a trend for the data available.
Units: mg/l Year
2015
Historical
period of record
High 0.6 0.9
Mean 0.3293 0.2858 0.15825137
Low 0.203 0.08
No. of Samples 24 333

Five-year Rolling Average Graph

     
1/1/2011231.0030.2310000mg/l0.2310000
2/1/2011251.0030.2410000mg/l0.2510000
3/1/2011325.0030.2690000mg/l0.3250000
4/1/2011367.0030.2935000mg/l0.3670000
5/1/2011603.0030.3554000mg/l0.6030000
6/1/2011361.0030.3563300mg/l0.3610000
7/1/2011448.0030.3925000mg/l0.4480000
8/1/2011184.0030.3813300mg/l0.1840000
9/1/2011312.0030.3791700mg/l0.3120000
10/1/2011611.0030.4198300mg/l0.6110000
11/1/2011175.0030.3485000mg/l0.1750000
12/1/2011410.0030.3566700mg/l0.4100000
1/1/2012289.0030.3301700mg/l0.2890000
2/1/2012281.0030.3463300mg/l0.2810000
3/1/2012467.0030.3721700mg/l0.4670000
4/1/2012307.0030.3215000mg/l0.3070000
5/1/2012489.0030.3738300mg/l0.4890000
6/1/2012147.0030.3300000mg/l0.1470000
7/1/2012280.0030.3285000mg/l0.2800000
8/1/2012185.0030.3125000mg/l0.1850000
9/1/2012224.0030.2720000mg/l0.2240000
10/1/2012257.0030.2636700mg/l0.2570000
11/1/2012299.0030.2320000mg/l0.2990000
12/1/2012282.0030.2545000mg/l0.2820000
1/1/2013247.0030.2490000mg/l0.2470000
2/1/2013278.0030.2645000mg/l0.2780000
3/1/2013187.0030.2583300mg/l0.1870000
4/1/2013377.0030.2783300mg/l0.3770000
5/1/2013495.0030.3110000mg/l0.4950000
6/1/2013346.0030.3216700mg/l0.3460000
7/1/2013256.0030.3231700mg/l0.2560000
8/1/2013147.0030.3013300mg/l0.1470000
9/1/2013236.0030.3095000mg/l0.2360000
10/1/2013249.0030.2881700mg/l0.2490000
11/1/2013268.0020.2503300mg/l0.2680000
12/1/2013387.0030.2571700mg/l0.3870000
1/1/2014149.0040.2393300mg/l0.1490000
2/1/2014241.0040.2550000mg/l0.2410000
3/1/2014234.0040.2546700mg/l0.2340000
4/1/2014388.0040.2778300mg/l0.3880000
5/1/2014467.0040.3110000mg/l0.4670000
6/1/2014376.0040.3091700mg/l0.3760000
7/1/2014758.0040.4106700mg/l0.7580000
8/1/2014632.0040.4758300mg/l0.6320000
9/1/2014308.0040.4881700mg/l0.3080000
10/1/2014208.0040.4581700mg/l0.2080000
11/1/2014177.0040.4098300mg/l0.1770000
12/1/2014266.0040.3915000mg/l0.2660000
1/1/2015253.0030.3073300mg/l0.2530000
2/1/2015203.0030.2358300mg/l0.2030000
3/1/2015512.0030.2698300mg/l0.5120000
4/1/2015648.0020.3431700mg/l0.6480000
5/1/2015311.0020.3655000mg/l0.3110000
6/1/2015485.0030.4020000mg/l0.4850000
7/1/2015217.0020.3960000mg/l0.2170000
8/1/2015274.0020.4078300mg/l0.2740000
9/1/2015256.0020.3651700mg/l0.2560000
10/1/2015435.0010.3296700mg/l0.4350000
11/1/2015312.0010.3298300mg/l0.3120000
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
2015
Historical
period of record
High 49.8 157.4
Mean 24.04 33.69 22.37734
Low 12.70 1.00
No. of Samples 17 394

Five-year Rolling Average Graph

     
1/1/201131.40831.4000000percent (%)31.4000000
2/1/201163.69847.5500000percent (%)63.6900000
3/1/201144.84846.6400000percent (%)44.8400000
4/1/201162.51850.6100000percent (%)62.5100000
5/1/201116.85843.8600000percent (%)16.8500000
1/1/201236.00336.0000000percent (%)36.0000000
2/1/201254.30345.1500000percent (%)54.3000000
3/1/201245.80345.3700000percent (%)45.8000000
4/1/201279.90354.0000000percent (%)79.9000000
5/1/201217.70346.7400000percent (%)17.7000000
7/1/201215.40342.6200000percent (%)15.4000000
8/1/201221.50336.0600000percent (%)21.5000000
9/1/201218.30330.5600000percent (%)18.3000000
10/1/20123.30315.2400000percent (%)3.3000000
11/1/201240.10319.7200000percent (%)40.1000000
1/1/201332.90323.2200000percent (%)32.9000000
2/1/20136.90320.3000000percent (%)6.9000000
3/1/201344.00325.4400000percent (%)44.0000000
4/1/201312.30327.2400000percent (%)12.3000000
5/1/201316.10322.4400000percent (%)16.1000000
6/1/201320.90322.1800000percent (%)20.9000000
7/1/201353.30325.5800000percent (%)53.3000000
8/1/201320.30327.8200000percent (%)20.3000000
9/1/201313.60322.7500000percent (%)13.6000000
10/1/20131.00320.8700000percent (%)1.0000000
12/1/201318.60321.3600000percent (%)18.6000000
1/1/20143.60411.4200000percent (%)3.6000000
2/1/201436.40414.6400000percent (%)36.4000000
3/1/201443.90420.7000000percent (%)43.9000000
4/1/201419.40424.3800000percent (%)19.4000000
5/1/201432.40425.7200000percent (%)32.4000000
6/1/201410.40424.3500000percent (%)10.4000000
7/1/201423.80127.7200000percent (%)23.8000000
8/1/20146.70422.7700000percent (%)6.7000000
9/1/201420.30418.8300000percent (%)20.3000000
10/1/201462.60426.0300000percent (%)62.6000000
11/1/201447.00428.4700000percent (%)47.0000000
12/1/201471.00438.5700000percent (%)71.0000000
1/1/201536.50340.6800000percent (%)36.5000000
2/1/201530.30344.6200000percent (%)30.3000000
3/1/201512.80343.3700000percent (%)12.8000000
6/1/201512.70323.0800000percent (%)12.7000000
7/1/201549.80126.4000000percent (%)49.8000000
8/1/201534.30127.4000000percent (%)34.3000000
9/1/201537.40133.5500000percent (%)37.4000000
10/1/201532.20133.2800000percent (%)32.2000000
11/1/201525.10131.9200000percent (%)25.1000000
Target
percent (%)
Threshold
56.00 percent (%)

BOD, Biochemical oxygen demand

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

Five-year Rolling Average Graph

     
1/1/20111.8931.8900000mg/l1.8900000
2/1/20111.8231.8600000mg/l1.8200000
3/1/20111.4231.7100000mg/l1.4200000
4/1/20111.3931.6300000mg/l1.3900000
5/1/20112.9031.8800000mg/l2.9000000
6/1/20113.1232.0900000mg/l3.1200000
7/1/20114.3232.5000000mg/l4.3200000
8/1/20110.9832.3600000mg/l0.9800000
9/1/20111.9832.4500000mg/l1.9800000
10/1/20112.9732.7100000mg/l2.9700000
11/1/20111.4932.4800000mg/l1.4900000
12/1/20110.8032.0900000mg/l0.8000000
1/1/20121.7411.6600000mg/l1.7400000
2/1/20121.0731.6800000mg/l1.0700000
3/1/20121.4231.5800000mg/l1.4200000
4/1/20121.6231.3600000mg/l1.6200000
5/1/20122.6031.5400000mg/l2.6000000
6/1/20122.0031.7400000mg/l2.0000000
7/1/20121.3231.6700000mg/l1.3200000
8/1/20121.3931.7300000mg/l1.3900000
9/1/20120.9531.6500000mg/l0.9500000
10/1/20120.5431.4700000mg/l0.5400000
11/1/20121.0631.2100000mg/l1.0600000
12/1/20120.5030.9600000mg/l0.5000000
1/1/20131.3830.9700000mg/l1.3800000
2/1/20130.9630.9000000mg/l0.9600000
3/1/20131.5030.9900000mg/l1.5000000
4/1/20131.8431.2100000mg/l1.8400000
5/1/20132.7031.4800000mg/l2.7000000
6/1/20132.0431.7400000mg/l2.0400000
7/1/20131.3831.7400000mg/l1.3800000
8/1/20131.5631.8400000mg/l1.5600000
9/1/20131.0331.7600000mg/l1.0300000
10/1/20131.1531.6400000mg/l1.1500000
11/1/20133.1321.7200000mg/l3.1300000
12/1/20130.7531.5000000mg/l0.7500000
1/1/20141.1841.4700000mg/l1.1800000
2/1/20140.6741.3200000mg/l0.6700000
3/1/20141.4441.3900000mg/l1.4400000
4/1/20141.8041.5000000mg/l1.8000000
5/1/20142.5341.4000000mg/l2.5300000
6/1/20142.4141.6700000mg/l2.4100000
7/1/20141.6841.7600000mg/l1.6800000
8/1/20141.4041.8800000mg/l1.4000000
9/1/20140.6641.7500000mg/l0.6600000
10/1/20141.9141.7700000mg/l1.9100000
11/1/20141.1241.5300000mg/l1.1200000
12/1/20143.9841.7900000mg/l3.9800000
1/1/20151.5731.7700000mg/l1.5700000
2/1/20151.5131.7900000mg/l1.5100000
3/1/20155.0632.5300000mg/l5.0600000
4/1/20153.9122.8600000mg/l3.9100000
5/1/20151.8122.9700000mg/l1.8100000
6/1/20155.4233.2100000mg/l5.4200000
7/1/20151.4023.1900000mg/l1.4000000
8/1/20151.5923.2000000mg/l1.5900000
9/1/20150.8022.4900000mg/l0.8000000
10/1/20151.4412.0800000mg/l1.4400000
11/1/20151.2111.9800000mg/l1.2100000

Color

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

Five-year Rolling Average Graph

     

Enterococcus Group Bacteria

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

Five-year Rolling Average Graph

     
4/1/20152000.0022000.0000000cfu/100ml2000.0000000
5/1/2015420.0021210.0000000cfu/100ml420.0000000
6/1/2015300.002906.6700000cfu/100ml300.0000000
7/1/2015130.002712.5000000cfu/100ml130.0000000
8/1/2015310.002632.0000000cfu/100ml310.0000000
9/1/2015510.002611.6700000cfu/100ml510.0000000
10/1/20152500.001695.0000000cfu/100ml2500.0000000
11/1/20156000.0011625.0000000cfu/100ml6000.0000000
Target
cfu/100ml
Threshold
cfu/100ml

Nitrogen, Ammonia + Ammonium as N

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

Five-year Rolling Average Graph

     
1/1/201150.00350.0000000ug/l50.0000000
2/1/2011190.003120.0000000ug/l190.0000000
3/1/201170.003103.3300000ug/l70.0000000
4/1/2011166.003119.0000000ug/l166.0000000
5/1/2011210.003137.2000000ug/l210.0000000
6/1/2011135.003136.8300000ug/l135.0000000
7/1/201132.003133.8300000ug/l32.0000000
8/1/201127.003106.6700000ug/l27.0000000
9/1/2011157.003121.1700000ug/l157.0000000
10/1/2011362.003153.8300000ug/l362.0000000
11/1/201197.003135.0000000ug/l97.0000000
12/1/2011243.003153.0000000ug/l243.0000000
1/1/2012134.003170.0000000ug/l134.0000000
2/1/2012116.003184.8300000ug/l116.0000000
3/1/201260.003168.6700000ug/l60.0000000
4/1/201288.673123.1100000ug/l88.6700000
5/1/201249.003115.1100000ug/l49.0000000
6/1/2012102.00391.6100000ug/l102.0000000
7/1/201292.00384.6100000ug/l92.0000000
8/1/201251.00373.7800000ug/l51.0000000
9/1/2012134.00386.1100000ug/l134.0000000
10/1/201297.00387.5000000ug/l97.0000000
11/1/2012151.003104.5000000ug/l151.0000000
12/1/2012143.003111.3300000ug/l143.0000000
1/1/2013157.003122.1700000ug/l157.0000000
2/1/2013169.003141.8300000ug/l169.0000000
3/1/201380.003132.8300000ug/l80.0000000
4/1/2013141.003140.1700000ug/l141.0000000
5/1/2013300.003165.0000000ug/l300.0000000
6/1/2013155.003167.0000000ug/l155.0000000
7/1/201342.003147.8300000ug/l42.0000000
8/1/201317.003122.5000000ug/l17.0000000
9/1/201322.003112.8300000ug/l22.0000000
10/1/201376.003102.0000000ug/l76.0000000
11/1/20138.00253.3300000ug/l8.0000000
12/1/2013114.00346.5000000ug/l114.0000000
1/1/201448.01547.5000000ug/l15.0700000
2/1/201487.22559.2100000ug/l27.3800000
3/1/201450.41563.9400000ug/l15.8200000
4/1/201488.53466.0300000ug/l20.9800000
5/1/201496.03480.7000000ug/l22.7600000
6/1/201431.21566.9000000ug/l9.8000000
7/1/20148.80560.3700000ug/l2.7600000
8/1/201476.82558.6300000ug/l24.1100000
9/1/20146.40551.3000000ug/l2.0100000
10/1/201440.01543.2100000ug/l12.5600000
11/1/201459.21537.0800000ug/l18.5900000
12/1/20146.40532.9400000ug/l2.0100000
1/1/201576.00344.1400000ug/l76.0000000
2/1/201586.00345.6700000ug/l86.0000000
3/1/201575.00357.1000000ug/l75.0000000
4/1/2015207.00284.9400000ug/l207.0000000
5/1/2015162.002102.0700000ug/l162.0000000
6/1/201572.003113.0000000ug/l72.0000000
7/1/2015178.002130.0000000ug/l178.0000000
8/1/201548.002123.6700000ug/l48.0000000
9/1/201578.002124.1700000ug/l78.0000000
10/1/2015232.001128.3300000ug/l232.0000000
11/1/2015127.001122.5000000ug/l127.0000000

Nitrogen, Kjeldahl

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

Five-year Rolling Average Graph

     
1/1/2011961.003961.0000000ug/l961.0000000
2/1/20111300.0031130.5000000ug/l1300.0000000
3/1/20111030.0031097.0000000ug/l1030.0000000
4/1/20111060.0031087.7500000ug/l1060.0000000
5/1/20111210.0031112.2000000ug/l1210.0000000
6/1/20111520.0031180.1700000ug/l1520.0000000
7/1/20111010.0031188.3300000ug/l1010.0000000
8/1/20111190.0031170.0000000ug/l1190.0000000
9/1/20111300.0031215.0000000ug/l1300.0000000
10/1/2011803.0031172.1700000ug/l803.0000000
11/1/20111120.0031157.1700000ug/l1120.0000000
12/1/2011924.0031057.8300000ug/l924.0000000
1/1/2012803.0031023.3300000ug/l803.0000000
2/1/2012995.003990.8300000ug/l995.0000000
3/1/2012921.003927.6700000ug/l921.0000000
4/1/2012987.003958.3300000ug/l987.0000000
5/1/20121410.0031006.6700000ug/l1410.0000000
6/1/20121200.0031052.6700000ug/l1200.0000000
7/1/20121250.0031127.1700000ug/l1250.0000000
8/1/20121140.0031151.3300000ug/l1140.0000000
9/1/20121300.0031214.5000000ug/l1300.0000000
10/1/20121140.0031240.0000000ug/l1140.0000000
11/1/2012879.0031151.5000000ug/l879.0000000
12/1/20121040.0031124.8300000ug/l1040.0000000
1/1/2013814.0031052.1700000ug/l814.0000000
2/1/20131110.0031047.1700000ug/l1110.0000000
3/1/20131290.0031045.5000000ug/l1290.0000000
4/1/2013769.003983.6700000ug/l769.0000000
5/1/20131600.0031103.8300000ug/l1600.0000000
6/1/20131640.0031203.8300000ug/l1640.0000000
7/1/20131350.0031293.1700000ug/l1350.0000000
8/1/20131380.0031338.1700000ug/l1380.0000000
9/1/20131290.0031338.1700000ug/l1290.0000000
10/1/20131180.0031406.6700000ug/l1180.0000000
11/1/20131040.0021313.3300000ug/l1040.0000000
12/1/20131150.0031231.6700000ug/l1150.0000000
1/1/20141140.0041196.6700000ug/l1140.0000000
2/1/20141150.0041158.3300000ug/l1150.0000000
3/1/2014925.0041097.5000000ug/l925.0000000
4/1/20141370.0041129.1700000ug/l1370.0000000
5/1/20141160.0041149.1700000ug/l1160.0000000
6/1/20141630.0041229.1700000ug/l1630.0000000
7/1/20142180.0041402.5000000ug/l2180.0000000
8/1/20141210.0041412.5000000ug/l1210.0000000
9/1/20141670.0041536.6700000ug/l1670.0000000
10/1/20141940.0041631.6700000ug/l1940.0000000
11/1/20141250.0041646.6700000ug/l1250.0000000
12/1/20141110.0041560.0000000ug/l1110.0000000
1/1/20151120.0031383.3300000ug/l1120.0000000
2/1/20151220.0031385.0000000ug/l1220.0000000
3/1/20151670.0031385.0000000ug/l1670.0000000
4/1/20151540.0021318.3300000ug/l1540.0000000
5/1/20151490.0021358.3300000ug/l1490.0000000
6/1/20152260.0031550.0000000ug/l2260.0000000
7/1/20151580.0021626.6700000ug/l1580.0000000
8/1/20151520.0021676.6700000ug/l1520.0000000
9/1/20151250.0021606.6700000ug/l1250.0000000
10/1/20151430.0011588.3300000ug/l1430.0000000
11/1/20151390.0011571.6700000ug/l1390.0000000

Nitrogen, Nitrite + Nitrate as N

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

Five-year Rolling Average Graph

     
1/1/2011313.003313.0000000ug/l313.0000000
2/1/2011213.003263.0000000ug/l213.0000000
3/1/201163.003196.3300000ug/l63.0000000
4/1/2011196.003196.2500000ug/l196.0000000
5/1/2011171.003191.2000000ug/l171.0000000
6/1/2011109.003177.5000000ug/l109.0000000
7/1/201127.003129.8300000ug/l27.0000000
8/1/201182.003108.0000000ug/l82.0000000
9/1/2011201.003131.0000000ug/l201.0000000
10/1/201117.003101.1700000ug/l17.0000000
11/1/2011215.003108.5000000ug/l215.0000000
12/1/2011301.003140.5000000ug/l301.0000000
1/1/2012186.003167.0000000ug/l186.0000000
2/1/2012218.003189.6700000ug/l218.0000000
3/1/201230.003161.1700000ug/l30.0000000
4/1/201272.003170.3300000ug/l72.0000000
5/1/201220.003137.8300000ug/l20.0000000
6/1/201239.00394.1700000ug/l39.0000000
7/1/2012222.003100.1700000ug/l222.0000000
8/1/2012153.00389.3300000ug/l153.0000000
9/1/2012311.003136.1700000ug/l311.0000000
10/1/2012308.003175.5000000ug/l308.0000000
11/1/2012261.003215.6700000ug/l261.0000000
12/1/2012308.003260.5000000ug/l308.0000000
1/1/2013142.003247.1700000ug/l142.0000000
2/1/2013194.003254.0000000ug/l194.0000000
3/1/2013186.003233.1700000ug/l186.0000000
4/1/2013138.003204.8300000ug/l138.0000000
5/1/201312.003163.3300000ug/l12.0000000
6/1/2013152.003137.3300000ug/l152.0000000
7/1/2013240.003153.6700000ug/l240.0000000
8/1/2013140.003144.6700000ug/l140.0000000
9/1/2013212.003149.0000000ug/l212.0000000
10/1/2013268.003170.6700000ug/l268.0000000
11/1/2013181.002198.8300000ug/l181.0000000
12/1/2013563.003267.3300000ug/l563.0000000
1/1/2014297.004276.8300000ug/l297.0000000
2/1/2014189.004285.0000000ug/l189.0000000
3/1/2014186.004280.6700000ug/l186.0000000
4/1/201413.004238.1700000ug/l13.0000000
5/1/201437.004214.1700000ug/l37.0000000
6/1/201451.004128.8300000ug/l51.0000000
7/1/201413.00381.5000000ug/l13.0000000
8/1/201441.00456.8300000ug/l41.0000000
9/1/2014124.00446.5000000ug/l124.0000000
10/1/2014143.00468.1700000ug/l143.0000000
11/1/2014305.004112.8300000ug/l305.0000000
12/1/2014292.004153.0000000ug/l292.0000000
1/1/2015218.003187.1700000ug/l218.0000000
2/1/20154.003181.0000000ug/l4.0000000
3/1/2015121.003180.5000000ug/l121.0000000
4/1/20158.002158.0000000ug/l8.0000000
5/1/201593.002122.6700000ug/l93.0000000
6/1/201548.00382.0000000ug/l48.0000000
7/1/2015140.00269.0000000ug/l140.0000000
8/1/2015145.00292.5000000ug/l145.0000000
9/1/2015272.002117.6700000ug/l272.0000000
10/1/2015222.001153.3300000ug/l222.0000000
11/1/2015288.001185.8300000ug/l288.0000000

Oysters

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

Five-year Rolling Average Graph

     
1/1/201486.83186.8300000%86.8300000
1/1/201585.11185.1100000%85.1100000

pH

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

Five-year Rolling Average Graph

     
1/1/20117.3937.3900000None7.3900000
2/1/20117.6337.5100000None7.6300000
3/1/20117.3237.4500000None7.3200000
4/1/20117.4137.4400000None7.4100000
5/1/20117.4237.4300000None7.4200000
1/1/20127.1337.1300000None7.1300000
2/1/20127.2837.2100000None7.2800000
3/1/20127.2937.2300000None7.2900000
4/1/20127.0837.2000000None7.0800000
5/1/20126.9737.1500000None6.9700000
7/1/20126.9637.1200000None6.9600000
8/1/20127.0837.0800000None7.0800000
9/1/20127.2637.0700000None7.2600000
10/1/20127.0737.0700000None7.0700000
11/1/20127.3437.1400000None7.3400000
1/1/20137.4037.2300000None7.4000000
2/1/20137.1537.2400000None7.1500000
3/1/20137.7037.3300000None7.7000000
4/1/20137.1537.3500000None7.1500000
5/1/20137.3937.3600000None7.3900000
6/1/20136.9137.2800000None6.9100000
7/1/20137.4737.3000000None7.4700000
8/1/20137.2937.3200000None7.2900000
9/1/20137.3737.2600000None7.3700000
10/1/20137.0637.2500000None7.0600000
12/1/20137.0837.2500000None7.0800000
1/1/20147.1047.1800000None7.1000000
2/1/20147.1747.1600000None7.1700000
3/1/20147.1847.1200000None7.1800000
4/1/20146.8737.0800000None6.8700000
5/1/20147.2937.1200000None7.2900000
6/1/20147.1447.1300000None7.1400000
7/1/20146.9617.1000000None6.9600000
8/1/20147.1937.1100000None7.1900000
9/1/20147.4047.1400000None7.4000000
10/1/20147.3437.2200000None7.3400000
11/1/20147.4147.2400000None7.4100000
12/1/20147.6447.3200000None7.6400000
1/1/20157.2737.3800000None7.2700000
2/1/20157.1837.3700000None7.1800000
3/1/20157.2337.3500000None7.2300000
6/1/20157.0737.1900000None7.0700000
7/1/20157.0617.1400000None7.0600000
8/1/20157.1117.1200000None7.1100000
9/1/20157.0417.0700000None7.0400000
10/1/20157.3027.1200000None7.3000000
11/1/20157.3127.1500000None7.3000000

Salinity

Units: PSS Year
2015
Historical
period of record
High 26.6 28.0
Mean 10.8 7.86 7.90104
Low 0.47 0.00
No. of Samples 17 314

Five-year Rolling Average Graph

     
1/1/201111.18311.1800000PSS11.1800000
2/1/20111.6936.4400000PSS1.6900000
3/1/20119.8037.5600000PSS9.8000000
4/1/20117.4137.5200000PSS7.4100000
5/1/201113.6338.7400000PSS13.6300000
1/1/201222.84322.8400000PSS22.8400000
2/1/201218.86320.8500000PSS18.8600000
3/1/201218.58320.0900000PSS18.5800000
4/1/201217.00319.3200000PSS17.0000000
5/1/201215.34318.5200000PSS15.3400000
7/1/20120.59314.0700000PSS0.5900000
8/1/20120.52310.4100000PSS0.5200000
9/1/20129.1438.5200000PSS9.1400000
10/1/20127.6236.6400000PSS7.6200000
11/1/201226.9938.9700000PSS26.9900000
1/1/201321.88313.2300000PSS21.8800000
2/1/201318.25316.7800000PSS18.2500000
3/1/20133.58315.6600000PSS3.5800000
4/1/201322.60318.6600000PSS22.6000000
5/1/201315.17316.3000000PSS15.1700000
6/1/20139.45315.1600000PSS9.4500000
7/1/20132.57311.9400000PSS2.5700000
8/1/20130.6039.0000000PSS0.6000000
9/1/20130.5938.5000000PSS0.5900000
10/1/20134.4635.4700000PSS4.4600000
12/1/201317.4135.1300000PSS17.4100000
1/1/20148.7246.3600000PSS8.7200000
2/1/201411.6548.5700000PSS11.6500000
3/1/201419.19412.2900000PSS19.1900000
4/1/201417.40414.8700000PSS17.4000000
5/1/201418.59415.4900000PSS18.5900000
6/1/20148.47414.0000000PSS8.4700000
7/1/20147.35113.7800000PSS7.3500000
8/1/201419.35415.0600000PSS19.3500000
9/1/201412.01413.8600000PSS12.0100000
10/1/20140.65411.0700000PSS0.6500000
11/1/20141.6748.2500000PSS1.6700000
12/1/201416.6249.6100000PSS16.6200000
1/1/201526.64312.8200000PSS26.6400000
2/1/201512.04311.6100000PSS12.0400000
3/1/201519.97312.9300000PSS19.9700000
6/1/201521.79320.1100000PSS21.7900000
7/1/20150.47113.5700000PSS0.4700000
8/1/20150.57110.7000000PSS0.5700000
9/1/20151.1115.9900000PSS1.1100000
10/1/201522.2219.2300000PSS22.2200000
11/1/201520.46111.1000000PSS20.4600000

Specific conductance

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

Five-year Rolling Average Graph

     
1/1/201118793.00318793.0000000umho18793.0000000
2/1/20113218.00311005.5000000umho3218.0000000
3/1/201116747.00312919.3300000umho16747.0000000
4/1/201112995.00312938.2500000umho12995.0000000
5/1/201122797.00314910.0000000umho22797.0000000
1/1/201236134.00336134.0000000umho36134.0000000
2/1/201230408.00333271.0000000umho30408.0000000
3/1/201230096.00332212.6700000umho30096.0000000
4/1/201227667.00331076.2500000umho27667.0000000
5/1/201225346.00329930.2000000umho25346.0000000
7/1/20121193.00322942.0000000umho1193.0000000
8/1/20121065.00317073.4000000umho1065.0000000
9/1/201215745.00314203.2000000umho15745.0000000
10/1/201213281.00311326.0000000umho13281.0000000
11/1/201241974.00314651.6000000umho41974.0000000
1/1/201334771.00321367.2000000umho34771.0000000
2/1/201329536.00327061.4000000umho29536.0000000
3/1/20136528.00325218.0000000umho6528.0000000
4/1/201335982.00329758.2000000umho35982.0000000
5/1/201325062.00326375.8000000umho25062.0000000
6/1/201314407.00324381.0000000umho14407.0000000
7/1/20134820.00319389.1700000umho4820.0000000
8/1/20131218.00314669.5000000umho1218.0000000
9/1/20131190.00313779.8300000umho1190.0000000
10/1/20138003.0039116.6700000umho8003.0000000
12/1/201328164.0038679.0000000umho28164.0000000
1/1/201414925.00410700.0000000umho14925.0000000
2/1/201419593.00414375.0000000umho19593.0000000
3/1/201430878.00420312.6000000umho30878.0000000
4/1/201428391.00424390.2000000umho28391.0000000
5/1/201430211.00425360.3300000umho30211.0000000
6/1/201414724.00423120.3300000umho14724.0000000
7/1/201412927.00122787.3300000umho12927.0000000
8/1/201431199.00424721.6700000umho31199.0000000
9/1/201420250.00422950.3300000umho20250.0000000
10/1/20141304.00418435.8300000umho1304.0000000
11/1/20143176.00413930.0000000umho3176.0000000
12/1/201427020.00415979.3300000umho27020.0000000
1/1/201541472.00320736.8300000umho41472.0000000
2/1/201520127.00318891.5000000umho20127.0000000
3/1/201532174.00320878.8300000umho32174.0000000
6/1/201535006.00332194.7500000umho35006.0000000
10/1/201535322.00135164.0000000umho35322.0000000
11/1/201532785.00134371.0000000umho32785.0000000

Temperature, water

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

Five-year Rolling Average Graph

     
1/1/201167.75267.7500000deg F67.7500000
2/1/201169.66268.7100000deg F69.6600000
3/1/201181.18272.8600000deg F81.1800000
4/1/201187.35276.4900000deg F87.3500000
5/1/201189.69279.1300000deg F89.6900000
1/1/201273.45273.4500000deg F73.4500000
2/1/201275.65274.5500000deg F75.6500000
3/1/201282.85277.3200000deg F82.8500000
4/1/201275.83276.9500000deg F75.8300000
5/1/201286.52278.8600000deg F86.5200000
7/1/201281.66280.5000000deg F81.6600000
8/1/201282.17281.8100000deg F82.1700000
9/1/201284.67282.1700000deg F84.6700000
10/1/201280.65283.1300000deg F80.6500000
11/1/201269.53279.7400000deg F69.5300000
1/1/201373.89278.1800000deg F73.8900000
2/1/201377.29277.2100000deg F77.2900000
3/1/201365.35273.3400000deg F65.3500000
4/1/201385.08274.2300000deg F85.0800000
5/1/201384.69277.2600000deg F84.6900000
6/1/201385.05278.5600000deg F85.0500000
7/1/201383.37280.1400000deg F83.3700000
8/1/201382.62281.0300000deg F82.6200000
9/1/201382.72283.9200000deg F82.7200000
10/1/201376.91282.5600000deg F76.9100000
12/1/201373.90279.9000000deg F73.9000000
1/1/201463.43375.9200000deg F63.4300000
2/1/201477.25374.8400000deg F77.2500000
3/1/201474.43373.1800000deg F74.4300000
4/1/201484.54374.7100000deg F84.5400000
5/1/201487.89376.9100000deg F87.8900000
6/1/201488.66379.3700000deg F88.6600000
7/1/201490.03183.8000000deg F90.0300000
8/1/201480.51384.3400000deg F80.5100000
9/1/201486.31386.3200000deg F86.3100000
10/1/201480.06385.5800000deg F80.0600000
11/1/201461.90381.2500000deg F61.9000000
12/1/201467.71377.7500000deg F67.7100000
1/1/201567.46273.9900000deg F67.4600000
2/1/201569.13272.1000000deg F69.1300000
3/1/201584.63271.8200000deg F84.6300000
6/1/201593.33278.6400000deg F93.3300000
7/1/201581.73182.2100000deg F81.7300000
8/1/201585.82186.3800000deg F85.8200000
9/1/201581.25185.5300000deg F81.2500000
10/1/201578.87184.2000000deg F78.8700000
11/1/201579.00183.3300000deg F79.0000000

Turbidity

Units: NTU Year
2015
Historical
period of record
High 30.0 30.0
Mean 7.33 4.94 3.48383
Low 2.80 1.20
No. of Samples 24 401

Five-year Rolling Average Graph

     
1/1/20116.9036.9000000NTU6.9000000
2/1/20115.5036.2000000NTU5.5000000
3/1/20113.9035.4300000NTU3.9000000
4/1/20115.8035.5300000NTU5.8000000
5/1/20119.5036.3200000NTU9.5000000
6/1/20114.5036.0200000NTU4.5000000
7/1/20117.5036.1200000NTU7.5000000
8/1/20111.5835.4600000NTU1.5800000
9/1/20115.9035.8000000NTU5.9000000
10/1/20118.1036.1800000NTU8.1000000
11/1/20114.6035.3600000NTU4.6000000
12/1/20114.9035.4300000NTU4.9000000
1/1/20123.5034.7600000NTU3.5000000
2/1/20123.6035.1000000NTU3.6000000
3/1/20124.0034.7800000NTU4.0000000
4/1/20124.4034.1700000NTU4.4000000
5/1/20127.5034.6500000NTU7.5000000
6/1/20121.5034.0800000NTU1.5000000
7/1/20122.6033.9300000NTU2.6000000
8/1/20122.3033.7200000NTU2.3000000
9/1/20124.1033.7300000NTU4.1000000
10/1/20122.6033.4300000NTU2.6000000
11/1/20124.0032.8500000NTU4.0000000
12/1/20123.4033.1700000NTU3.4000000
1/1/20133.9033.3800000NTU3.9000000
2/1/20137.1034.1800000NTU7.1000000
3/1/20135.1034.3500000NTU5.1000000
4/1/20134.5034.6700000NTU4.5000000
5/1/20138.0035.3300000NTU8.0000000
6/1/20136.4035.8300000NTU6.4000000
7/1/20134.6035.9500000NTU4.6000000
8/1/20132.7035.2200000NTU2.7000000
9/1/20133.6034.9700000NTU3.6000000
10/1/20133.5034.8000000NTU3.5000000
11/1/20133.6024.0700000NTU3.6000000
12/1/20136.9034.1500000NTU6.9000000
1/1/20145.5044.3000000NTU5.5000000
2/1/20145.5044.7700000NTU5.5000000
3/1/20144.6044.9300000NTU4.6000000
4/1/20148.5045.7700000NTU8.5000000
5/1/20147.3046.3800000NTU7.3000000
6/1/20145.0046.0700000NTU5.0000000
7/1/20146.2046.1800000NTU6.2000000
8/1/20146.3046.3200000NTU6.3000000
9/1/20144.2046.2500000NTU4.2000000
10/1/20142.9045.3200000NTU2.9000000
11/1/20143.0044.6000000NTU3.0000000
12/1/20144.9044.5800000NTU4.9000000
1/1/20154.7034.3300000NTU4.7000000
2/1/20157.1034.4700000NTU7.1000000
3/1/201517.0036.6000000NTU17.0000000
4/1/201530.00211.1200000NTU30.0000000
5/1/20156.30211.6700000NTU6.3000000
6/1/201515.00313.3500000NTU15.0000000
7/1/20152.80213.0300000NTU2.8000000
8/1/20153.80212.4800000NTU3.8000000
9/1/20153.70210.2700000NTU3.7000000
10/1/20154.3015.9800000NTU4.3000000
11/1/20154.0015.6000000NTU4.0000000
Other Measures of Creek Health

Oysters

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

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Most Recent Sarasota County Oyster Monitoring Program Data
Icon Site ID Year Dead Live Total % Live
1 NO1 2015 98 560 658 85

Impervious Features

North Creek is located within the Little Sarasota Bay Watershed. View details about the Little 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 North Creek Basin is covered by impervious surfaces.

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Land Use / Land Cover

North Creek is located within the Little Sarasota Bay Watershed. View details about the Little 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.