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Catfish Creek Condition Report for 2013

View 2011 Report

Caution

3 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: 3,984 acres
  • Location: North and central Sarasota County
  • Discharges into: Little Sarasota Bay

The surface water system in the Catfish Creek Basin has undergone significant alteration over the past century. Historical survey does not identify Catfish Creek by name, but aerial photographs and survey from the mid-1900s clearly show the meandering creek extending inland for over a half mile, narrowing, continuing inland for another mile, and ending at a large wetland. The basin was still relatively undeveloped by the 1970s, but Catfish Creek had been excavated in the developed areas and through the basin, connecting pockets of wetlands to drain low-lying areas. The basin is now highly developed, draining from north to south through a ditch trenched through what is now Palmer Ranch, a master-planned community of residential and commercial development. 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:
  • 1984AA
Pass

Chlorophyll a

Score: Pass
Units: mg/l Year
2013
Historical
period of record
High 0.0482 0.0968
Mean 0.0168 0.0145 0.01746169
Low 0.0046 0.0009
No. of Samples 11 103

Five-year Trend Graph

      
2/1/200912.5010.0125000mg/l0.0125000
3/1/200954.0010.0332500mg/l0.0540000
4/1/20098.7510.0250800mg/l0.0087500
5/1/200917.2010.0231100mg/l0.0172000
6/1/200938.2010.0261300mg/l0.0382000
7/1/200930.5010.0268600mg/l0.0305000
8/1/200934.3010.0304900mg/l0.0343000
9/1/200920.7010.0249400mg/l0.0207000
10/1/200925.1010.0276700mg/l0.0251000
11/1/200947.0010.0326300mg/l0.0470000
12/1/200977.3010.0391500mg/l0.0773000
1/1/20107.7310.0353600mg/l0.0077300
2/1/20109.4410.0312100mg/l0.0094400
3/1/201022.1010.0314500mg/l0.0221000
4/1/201013.5010.0295100mg/l0.0135000
6/1/201024.2010.0153900mg/l0.0242000
7/1/201024.0010.0186500mg/l0.0240000
8/1/201021.6010.0210800mg/l0.0216000
9/1/201043.3520.0253300mg/l0.0424800
10/1/201012.0010.0250300mg/l0.0120000
11/1/20104.6010.0216300mg/l0.0046000
12/1/201012.1010.0196100mg/l0.0121000
1/1/201112.0010.0176100mg/l0.0120000
2/1/201110.5010.0157600mg/l0.0105000
3/1/201123.0010.0123700mg/l0.0230000
4/1/201124.2010.0144000mg/l0.0242000
5/1/201128.8010.0184300mg/l0.0288000
6/1/201129.0010.0212500mg/l0.0290000
7/1/201119.4010.0224800mg/l0.0194000
8/1/20117.6910.0220200mg/l0.0076900
9/1/201121.2010.0217200mg/l0.0212000
10/1/201126.7010.0221300mg/l0.0267000
11/1/201131.1010.0225200mg/l0.0311000
12/1/201116.9010.0205000mg/l0.0169000
1/1/201210.2010.0189700mg/l0.0102000
2/1/201296.8010.0338200mg/l0.0968000
3/1/201224.2010.0343200mg/l0.0242000
4/1/201224.5010.0339500mg/l0.0245000
5/1/201222.5010.0325200mg/l0.0225000
6/1/201219.5010.0329500mg/l0.0195000
7/1/201210.4010.0329800mg/l0.0104000
8/1/201214.3010.0192300mg/l0.0143000
9/1/201222.5010.0189500mg/l0.0225000
10/1/201227.1010.0193800mg/l0.0271000
11/1/201210.8010.0174300mg/l0.0108000
12/1/201214.0010.0165200mg/l0.0140000
1/1/20134.5910.0155500mg/l0.0045900
2/1/20135.8510.0141400mg/l0.0058500
3/1/20138.5810.0118200mg/l0.0085800
4/1/201321.0010.0108000mg/l0.0210000
5/1/201348.2010.0170400mg/l0.0482000
6/1/201338.6010.0211400mg/l0.0386000
7/1/201327.4010.0249400mg/l0.0274000
8/1/201313.3010.0261800mg/l0.0133000
9/1/201320.8010.0282200mg/l0.0208000
10/1/201321.5010.0283000mg/l0.0215000
12/1/201320.3010.0206600mg/l0.0203000
Target
mg/l
Threshold
0.02 mg/l
Pass

Nitrogen, Total

Score: Pass
Units: mg/l Year
2013
Historical
period of record
High 1.442 1.906
Mean 0.9386 1.0398 0.24887731
Low 0.50 0.431
No. of Samples 8 100

Five-year Trend Graph

      
2/1/2009644.0010.6440000mg/l0.6440000
3/1/20091212.0010.9280000mg/l1.2120000
4/1/2009796.0010.8840000mg/l0.7960000
5/1/2009874.0010.8815000mg/l0.8740000
6/1/20091142.0010.9336000mg/l1.1420000
7/1/20091012.0010.9466700mg/l1.0120000
8/1/2009766.0010.9670000mg/l0.7660000
9/1/20091145.0010.9558300mg/l1.1450000
10/1/2009994.0010.9888300mg/l0.9940000
11/1/20091297.0011.0593300mg/l1.2970000
12/1/20091479.0011.1155000mg/l1.4790000
1/1/20101035.0011.1193300mg/l1.0350000
2/1/2010866.0011.1360000mg/l0.8660000
3/1/20101219.0011.1483300mg/l1.2190000
4/1/20101203.0011.1831700mg/l1.2030000
6/1/20101482.0011.1610000mg/l1.4820000
7/1/2010979.0011.1498000mg/l0.9790000
8/1/20101359.0011.2484000mg/l1.3590000
9/1/20101262.0021.2570000mg/l1.2613700
10/1/2010874.0011.1912000mg/l0.8740000
11/1/20101152.0011.1846700mg/l1.1520000
12/1/20101072.0011.1163300mg/l1.0720000
1/1/20111086.0011.1341700mg/l1.0860000
2/1/20111529.0011.1625000mg/l1.5290000
3/1/20111042.0011.1258300mg/l1.0420000
4/1/20111096.0011.1628300mg/l1.0960000
5/1/20111378.0011.2005000mg/l1.3780000
6/1/20111099.0011.2050000mg/l1.0990000
7/1/2011977.0011.1868300mg/l0.9770000
8/1/20111164.0011.1260000mg/l1.1640000
9/1/20111324.0011.1730000mg/l1.3240000
10/1/20111120.0011.1770000mg/l1.1200000
11/1/20111037.0011.1201700mg/l1.0370000
12/1/2011914.0011.0893300mg/l0.9140000
1/1/2012844.0011.0671700mg/l0.8440000
2/1/20121262.0011.0835000mg/l1.2620000
3/1/20121112.0011.0481700mg/l1.1120000
4/1/20121082.0011.0418300mg/l1.0820000
5/1/20121124.0011.0563300mg/l1.1240000
6/1/20121428.0011.1420000mg/l1.4280000
7/1/20121241.0011.2081700mg/l1.2410000
8/1/20121192.0011.1965000mg/l1.1920000
9/1/2012919.0011.1643300mg/l0.9190000
10/1/20121085.0011.1648300mg/l1.0850000
11/1/2012843.0011.1180000mg/l0.8430000
12/1/2012898.0011.0296700mg/l0.8980000
1/1/2013694.0010.9385000mg/l0.6940000
2/1/2013798.0010.8728300mg/l0.7980000
3/1/2013876.0010.8656700mg/l0.8760000
4/1/2013500.0010.7681700mg/l0.5000000
5/1/20131442.0010.8680000mg/l1.4420000
6/1/20131188.0010.9163300mg/l1.1880000
7/1/20131382.0011.0310000mg/l1.3820000
8/1/20131240.0011.1046700mg/l1.2400000
9/1/20131327.0011.1798300mg/l1.3270000
10/1/20131150.0011.2881700mg/l1.1500000
12/1/20131128.0011.2454000mg/l1.1280000
Pass

Phosphorus, Total

Score: Pass
Units: mg/l Year
2013
Historical
period of record
High 0.151 0.63
Mean 0.1252 0.1302 0.09264478
Low 0.094 0.036
No. of Samples 6 63

Five-year Trend Graph

      
2/1/200955.0010.0550000mg/l0.0550000
3/1/200987.0010.0710000mg/l0.0870000
4/1/200970.0010.0706700mg/l0.0700000
5/1/200977.0010.0722500mg/l0.0770000
6/1/2009158.0010.0894000mg/l0.1580000
7/1/2009182.0010.1048300mg/l0.1820000
8/1/2009144.0010.1196700mg/l0.1440000
9/1/2009128.0010.1265000mg/l0.1280000
10/1/200978.0010.1278300mg/l0.0780000
11/1/2009123.0010.1355000mg/l0.1230000
12/1/2009120.0010.1291700mg/l0.1200000
1/1/201068.0010.1101700mg/l0.0680000
2/1/201080.0010.0995000mg/l0.0800000
3/1/2010137.0010.1010000mg/l0.1370000
4/1/2010105.0010.1055000mg/l0.1050000
6/1/2010316.0010.1412000mg/l0.3160000
7/1/2010171.0010.1618000mg/l0.1710000
8/1/2010264.0010.1986000mg/l0.2640000
9/1/2010167.5020.2047000mg/l0.1674100
10/1/201091.0010.2019000mg/l0.0910000
11/1/201083.0010.1820800mg/l0.0830000
12/1/201084.0010.1434200mg/l0.0840000
1/1/201176.0010.1275800mg/l0.0760000
2/1/201166.0010.0945800mg/l0.0660000
3/1/201188.0010.0813300mg/l0.0880000
4/1/201197.0010.0823300mg/l0.0970000
5/1/201184.0010.0825000mg/l0.0840000
6/1/2011124.0010.0891700mg/l0.1240000
7/1/2011107.0010.0943300mg/l0.1070000
8/1/2011161.0010.1101700mg/l0.1610000
9/1/201191.0010.1106700mg/l0.0910000
10/1/2011174.0010.1235000mg/l0.1740000
11/1/201174.0010.1218300mg/l0.0740000
12/1/201164.0010.1118300mg/l0.0640000
1/1/201251.0010.1025000mg/l0.0510000
2/1/201281.0010.0891700mg/l0.0810000
3/1/2012110.0010.0923300mg/l0.1100000
4/1/201298.0010.0796700mg/l0.0980000
5/1/2012450.0010.1423300mg/l0.4500000
6/1/2012241.0010.1718300mg/l0.2410000
7/1/2012130.0010.1850000mg/l0.1300000
8/1/2012175.0010.2006700mg/l0.1750000
9/1/201238.0010.1886700mg/l0.0380000
10/1/201271.0010.1841700mg/l0.0710000
11/1/201251.0010.1176700mg/l0.0510000
12/1/201274.0010.0898300mg/l0.0740000
1/1/201348.0010.0761700mg/l0.0480000
2/1/201381.0010.0605000mg/l0.0810000
3/1/201382.0010.0678300mg/l0.0820000
4/1/2013111.0010.0745000mg/l0.1110000
5/1/201394.0010.0816700mg/l0.0940000
6/1/2013139.0010.0925000mg/l0.1390000
7/1/201374.0010.0968300mg/l0.0740000
8/1/2013150.0010.1083300mg/l0.1500000
9/1/2013151.0010.1198300mg/l0.1510000
10/1/2013117.0010.1208300mg/l0.1170000
12/1/201393.0010.1170000mg/l0.0930000
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
2013
Historical
period of record
High 124.60 172.70
Mean 102.82 87.87 31.62819
Low 75.10 26.80
No. of Samples 5 95

Five-year Trend Graph

      
2/1/200998.30198.3000000percent (%)98.3000000
3/1/2009160.801129.5500000percent (%)160.8000000
4/1/2009106.801121.9700000percent (%)106.8000000
6/1/200991.301114.3000000percent (%)91.3000000
7/1/2009103.101112.0600000percent (%)103.1000000
8/1/2009102.601112.9200000percent (%)102.6000000
9/1/200952.60191.2800000percent (%)52.6000000
10/1/200986.50187.2200000percent (%)86.5000000
11/1/200972.60184.7800000percent (%)72.6000000
12/1/2009132.80191.7000000percent (%)132.8000000
2/1/2010114.40191.7800000percent (%)114.4000000
3/1/201081.90197.6400000percent (%)81.9000000
4/1/201076.90195.7200000percent (%)76.9000000
7/1/2010113.20196.6000000percent (%)113.2000000
9/1/201099.35296.4800000percent (%)99.3500000
10/1/201084.70199.0800000percent (%)84.7000000
11/1/2010140.701109.4900000percent (%)140.7000000
12/1/2010104.801108.5500000percent (%)104.8000000
1/1/201193.601104.6300000percent (%)93.6000000
2/1/201185.201101.3900000percent (%)85.2000000
3/1/201172.70196.9500000percent (%)72.7000000
4/1/201197.00199.0000000percent (%)97.0000000
5/1/201196.30191.6000000percent (%)96.3000000
1/1/2012105.301105.3000000percent (%)105.3000000
2/1/2012124.701115.0000000percent (%)124.7000000
3/1/2012115.501115.1700000percent (%)115.5000000
4/1/2012115.401115.2300000percent (%)115.4000000
5/1/201276.101107.4000000percent (%)76.1000000
7/1/201226.80191.7000000percent (%)26.8000000
8/1/201234.00173.5600000percent (%)34.0000000
9/1/201279.70166.4000000percent (%)79.7000000
10/1/201267.30156.7800000percent (%)67.3000000
11/1/201283.40158.2400000percent (%)83.4000000
12/1/2012103.50165.7800000percent (%)103.5000000
1/1/2013124.60182.0800000percent (%)124.6000000
2/1/201384.70190.5300000percent (%)84.7000000
3/1/2013120.00197.2500000percent (%)120.0000000
4/1/201375.10198.5500000percent (%)75.1000000
5/1/2013120.801104.7800000percent (%)120.8000000
Target
percent (%)
Threshold
38.00 percent (%)

Rainfall

Units: inches Year
2013
Historical
period of record
High 40.01 48.44
Mean 13.703171787326
Low 7.22
No. of Samples 359 4,683

Five-year Trend Graph

      
1/1/20090.78310.7800000inches0.7800000
2/1/20090.54280.5400000inches0.5400000
3/1/20090.82310.8200000inches0.8200000
4/1/20091.70301.7000000inches1.7000000
5/1/20094.35314.3500000inches4.3500000
6/1/20094.71304.7100000inches4.7100000
7/1/20093.64313.6400000inches3.6400000
8/1/20093.27313.2700000inches3.2700000
9/1/20096.63306.6300000inches6.6300000
10/1/20091.07311.0700000inches1.0700000
11/1/20095.48305.4800000inches5.4800000
12/1/20094.78314.7800000inches4.7800000
1/1/20103.32313.3200000inches3.3200000
2/1/20102.12282.1200000inches2.1200000
3/1/20107.03317.0300000inches7.0300000
4/1/20105.31305.3100000inches5.3100000
5/1/20100.74310.7400000inches0.7400000
6/1/20103.84303.8400000inches3.8400000
7/1/20105.32315.3200000inches5.3200000
8/1/20108.32318.3200000inches8.3200000
9/1/20103.46303.4600000inches3.4600000
10/1/20100.00310.0000000inches0.0000000
11/1/20100.48300.4800000inches0.4800000
12/1/20100.84310.8400000inches0.8400000
1/1/20112.37312.3700000inches2.3700000
2/1/20110.39280.3900000inches0.3900000
3/1/20119.44319.4400000inches9.4400000
4/1/20111.24301.2400000inches1.2400000
5/1/20112.78312.7800000inches2.7800000
6/1/20111.52301.5200000inches1.5200000
7/1/20115.35315.3500000inches5.3500000
8/1/20116.03316.0300000inches6.0300000
9/1/20114.97304.9700000inches4.9700000
10/1/20111.20301.2000000inches1.2000000
11/1/20112.07302.0700000inches2.0700000
12/1/20110.13300.1300000inches0.1300000
1/1/20120.68290.6800000inches0.6800000
2/1/20121.37291.3700000inches1.3700000
3/1/20121.61311.6100000inches1.6100000
4/1/20122.24242.2400000inches2.2400000
5/1/20122.41312.4100000inches2.4100000
6/1/201216.503016.5000000inches16.5000000
7/1/20127.05317.0500000inches7.0500000
8/1/20127.43317.4300000inches7.4300000
9/1/20124.49304.4900000inches4.4900000
10/1/20122.65312.6500000inches2.6500000
11/1/20120.08280.0800000inches0.0800000
12/1/20121.93311.9300000inches1.9300000
1/1/20130.31310.3100000inches0.3100000
2/1/20131.07231.0700000inches1.0700000
3/1/20131.57301.5700000inches1.5700000
4/1/20133.19303.1900000inches3.1900000
5/1/20131.68311.6800000inches1.6800000
6/1/20138.86308.8600000inches8.8600000
7/1/20134.29314.2900000inches4.2900000
8/1/20138.42318.4200000inches8.4200000
9/1/20138.78308.7800000inches8.7800000
10/1/20130.95310.9500000inches0.9500000
11/1/20130.76300.7600000inches0.7600000
12/1/20130.13310.1300000inches0.1300000
Target
inches
Threshold
inches

Salinity

Units: PSS Year
2013
Historical
period of record
High 0.69 56.00
Mean 0.63 0.53 5.69335
Low 0.56 0.22
No. of Samples 5 95

Five-year Trend Graph

      
2/1/20090.6210.6200000PSS0.6200000
3/1/20090.5810.6000000PSS0.5800000
4/1/20090.7310.6400000PSS0.7300000
6/1/20090.7210.6600000PSS0.7200000
7/1/20090.4710.6200000PSS0.4700000
8/1/20090.4110.5800000PSS0.4100000
9/1/20090.4610.5600000PSS0.4600000
10/1/20090.6710.5500000PSS0.6700000
11/1/20090.4410.5300000PSS0.4400000
12/1/20090.4710.4900000PSS0.4700000
2/1/20100.5110.5100000PSS0.5100000
3/1/20100.2810.4700000PSS0.2800000
4/1/20100.3910.4200000PSS0.3900000
7/1/20100.5110.4200000PSS0.5100000
9/1/20100.4620.4500000PSS0.4500000
10/1/20100.2210.4000000PSS0.2200000
11/1/20100.7110.4800000PSS0.7100000
12/1/20100.6410.5100000PSS0.6400000
1/1/20110.6410.5300000PSS0.6400000
2/1/20110.6610.5600000PSS0.6600000
3/1/20110.6110.5800000PSS0.6100000
4/1/20110.6110.6500000PSS0.6100000
5/1/20110.6010.6300000PSS0.6000000
1/1/20120.7210.7200000PSS0.7200000
2/1/20120.7410.7300000PSS0.7400000
3/1/20120.7010.7200000PSS0.7000000
4/1/20120.6810.7100000PSS0.6800000
5/1/20120.6910.7100000PSS0.6900000
7/1/20120.3310.6300000PSS0.3300000
8/1/20120.3410.5500000PSS0.3400000
9/1/20120.5210.5100000PSS0.5200000
10/1/20120.4610.4700000PSS0.4600000
11/1/20120.6910.4700000PSS0.6900000
12/1/20120.6610.5000000PSS0.6600000
1/1/20130.6110.5500000PSS0.6100000
2/1/20130.6910.6100000PSS0.6900000
3/1/20130.6610.6300000PSS0.6600000
4/1/20130.5610.6500000PSS0.5600000
5/1/20130.6310.6400000PSS0.6300000

Turbidity

Units: NTU Year
2013
Historical
period of record
High 8.00 9.40
Mean 4.82 4.38 1.71384
Low 2.30 1.20
No. of Samples 11 103

Five-year Trend Graph

      
2/1/20092.4012.4000000NTU2.4000000
3/1/20099.2015.8000000NTU9.2000000
4/1/20092.2014.6000000NTU2.2000000
5/1/20093.6014.3500000NTU3.6000000
6/1/20093.3014.1400000NTU3.3000000
7/1/20094.5014.2000000NTU4.5000000
8/1/20094.7014.5800000NTU4.7000000
9/1/20096.8014.1800000NTU6.8000000
10/1/20093.6014.4200000NTU3.6000000
11/1/20096.5014.9000000NTU6.5000000
12/1/20097.6015.6200000NTU7.6000000
1/1/20106.7015.9800000NTU6.7000000
2/1/20105.8016.1700000NTU5.8000000
3/1/20105.9016.0200000NTU5.9000000
4/1/20103.5016.0000000NTU3.5000000
6/1/20105.9015.5600000NTU5.9000000
7/1/20104.9015.2000000NTU4.9000000
8/1/20108.2015.6800000NTU8.2000000
9/1/20106.6525.8300000NTU6.6000000
10/1/20103.7015.8700000NTU3.7000000
11/1/20105.1015.7400000NTU5.1000000
12/1/20104.2015.4600000NTU4.2000000
1/1/20114.4015.3800000NTU4.4000000
2/1/20113.0014.5100000NTU3.0000000
3/1/20116.1014.4200000NTU6.1000000
4/1/20115.9014.7800000NTU5.9000000
5/1/20117.8015.2300000NTU7.8000000
6/1/20113.0015.0300000NTU3.0000000
7/1/20114.5015.0500000NTU4.5000000
8/1/20113.5015.1300000NTU3.5000000
9/1/20114.2014.8200000NTU4.2000000
10/1/20118.5015.2500000NTU8.5000000
11/1/20115.6014.8800000NTU5.6000000
12/1/20112.1014.7300000NTU2.1000000
1/1/20122.8014.4500000NTU2.8000000
2/1/20124.8014.6700000NTU4.8000000
3/1/20125.5014.8800000NTU5.5000000
4/1/20123.5014.0500000NTU3.5000000
5/1/20124.5013.8700000NTU4.5000000
6/1/20124.4014.2500000NTU4.4000000
7/1/20124.1014.4700000NTU4.1000000
8/1/20123.0014.1700000NTU3.0000000
9/1/20124.4013.9800000NTU4.4000000
10/1/20125.7014.3500000NTU5.7000000
11/1/20123.1014.1200000NTU3.1000000
12/1/20123.1013.9000000NTU3.1000000
1/1/20132.3013.6000000NTU2.3000000
2/1/20133.8013.7300000NTU3.8000000
3/1/20133.8013.6300000NTU3.8000000
4/1/20134.0013.3500000NTU4.0000000
5/1/20138.0014.1700000NTU8.0000000
6/1/20135.9014.6300000NTU5.9000000
7/1/20136.5015.3300000NTU6.5000000
8/1/20135.9015.6800000NTU5.9000000
9/1/20134.7015.8300000NTU4.7000000
10/1/20136.3016.2200000NTU6.3000000
12/1/20134.6015.6000000NTU4.6000000
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:
  • 1984
Pass

Chlorophyll a

Score: Pass
Units: mg/l Year
2013
Historical
period of record
High 0.0 0.1
Mean 0.0029 0.005 0.02269214
Low 0.0003 0.0001
No. of Samples 11 114

Five-year Trend Graph

     
1/1/20091.6910.0016900mg/l0.0016900
2/1/20091.0310.0013600mg/l0.0010300
3/1/200949.0010.0172400mg/l0.0490000
4/1/20091.6210.0133400mg/l0.0016200
5/1/20091.7210.0110100mg/l0.0017200
6/1/20092.5210.0096000mg/l0.0025200
7/1/20091.2010.0095200mg/l0.0012000
8/1/20091.9710.0096700mg/l0.0019700
9/1/20097.6010.0027700mg/l0.0076000
10/1/20092.5810.0029300mg/l0.0025800
11/1/200919.2010.0058500mg/l0.0192000
12/1/200915.3010.0079800mg/l0.0153000
1/1/20102.3110.0081600mg/l0.0023100
2/1/20102.1710.0081900mg/l0.0021700
3/1/201014.2010.0092900mg/l0.0142000
4/1/20108.4710.0102800mg/l0.0084700
6/1/2010142.0010.0338300mg/l0.1420000
7/1/201014.4010.0362500mg/l0.0144000
9/1/201025.9920.0477200mg/l0.0193900
10/1/20103.2710.0464200mg/l0.0032700
11/1/20107.3510.0386000mg/l0.0073500
12/1/20105.1910.0112400mg/l0.0051900
1/1/20117.4610.0098500mg/l0.0074600
2/1/20113.0410.0087200mg/l0.0030400
3/1/20114.3910.0051200mg/l0.0043900
4/1/20118.8610.0060500mg/l0.0088600
5/1/20117.5810.0060900mg/l0.0075800
6/1/201121.0010.0087200mg/l0.0210000
7/1/20115.5810.0084100mg/l0.0055800
8/1/20116.3910.0089700mg/l0.0063900
9/1/201110.2010.0099400mg/l0.0102000
10/1/20119.1210.0099800mg/l0.0091200
11/1/201114.8010.0111800mg/l0.0148000
12/1/20112.3110.0080700mg/l0.0023100
1/1/20127.7310.0084300mg/l0.0077300
2/1/201280.2010.0207300mg/l0.0802000
3/1/20126.7010.0201400mg/l0.0067000
4/1/20124.9910.0194600mg/l0.0049900
5/1/20125.6210.0179300mg/l0.0056200
6/1/201219.8010.0208400mg/l0.0198000
7/1/20128.9610.0210500mg/l0.0089600
8/1/201214.1010.0100300mg/l0.0141000
9/1/20123.3510.0094700mg/l0.0033500
10/1/20123.8410.0092800mg/l0.0038400
11/1/20121.0110.0085100mg/l0.0010100
12/1/20120.8910.0053600mg/l0.0008900
1/1/20130.4810.0039500mg/l0.0004800
2/1/20130.6210.0017000mg/l0.0006200
3/1/20130.3210.0011900mg/l0.0003200
4/1/20130.8610.0007000mg/l0.0008600
5/1/20131.1510.0007200mg/l0.0011500
6/1/201319.9010.0038900mg/l0.0199000
7/1/201311.1010.0056600mg/l0.0111000
8/1/201311.7010.0075100mg/l0.0117000
9/1/201312.1010.0094700mg/l0.0121000
10/1/201318.0010.0123300mg/l0.0180000
12/1/20132.4710.0110700mg/l0.0024700
Target
mg/l
Threshold
0.011 mg/l
Pass

Nitrogen, Total

Trend analysis shows a weak decreasing trend.
Score: Pass
Units: mg/l Year
2013
Historical
period of record
High 1.6 5.1
Mean 0.8555 1.1229 0.62665171
Low 0.302 0.131
No. of Samples 10 145

Five-year Trend Graph

     
1/1/2009884.0010.8840000mg/l0.8840000
2/1/2009546.0010.7150000mg/l0.5460000
3/1/20091645.0011.0250000mg/l1.6450000
4/1/20091275.0011.0875000mg/l1.2750000
5/1/2009799.0011.0298000mg/l0.7990000
6/1/20091092.0011.0401700mg/l1.0920000
7/1/2009912.0011.0448300mg/l0.9120000
8/1/2009719.0011.0736700mg/l0.7190000
9/1/20091079.0010.9793300mg/l1.0790000
10/1/2009987.0010.9313300mg/l0.9870000
11/1/20091566.0011.0591700mg/l1.5660000
12/1/20091205.0011.0780000mg/l1.2050000
1/1/20101055.0011.1018300mg/l1.0550000
2/1/2010885.0011.1295000mg/l0.8850000
3/1/20101090.0011.1313300mg/l1.0900000
4/1/20101112.0011.1521700mg/l1.1120000
6/1/20104060.0011.6404000mg/l4.0600000
7/1/20101392.0011.7078000mg/l1.3920000
9/1/20101309.0021.9682500mg/l1.3065500
10/1/20101345.0012.0265000mg/l1.3450000
11/1/20101223.0011.8658000mg/l1.2230000
12/1/20101187.0011.2912000mg/l1.1870000
1/1/20111115.0011.2358000mg/l1.1150000
2/1/20111685.0011.3106700mg/l1.6850000
3/1/2011957.0011.2520000mg/l0.9570000
4/1/20111158.0011.2208300mg/l1.1580000
5/1/20111066.0011.1946700mg/l1.0660000
6/1/20111072.0011.1755000mg/l1.0720000
7/1/20111030.0011.1613300mg/l1.0300000
8/1/20111153.0011.0726700mg/l1.1530000
9/1/20111428.0011.1511700mg/l1.4280000
10/1/20111010.0011.1265000mg/l1.0100000
11/1/2011986.0011.1131700mg/l0.9860000
12/1/2011889.0011.0826700mg/l0.8890000
1/1/2012845.0011.0518300mg/l0.8450000
2/1/20121171.0011.0548300mg/l1.1710000
3/1/20121049.0010.9916700mg/l1.0490000
4/1/2012965.0010.9841700mg/l0.9650000
5/1/2012904.0010.9705000mg/l0.9040000
6/1/20121424.0011.0596700mg/l1.4240000
7/1/20121204.0011.1195000mg/l1.2040000
8/1/20121118.0011.1106700mg/l1.1180000
9/1/20121077.0011.1153300mg/l1.0770000
10/1/20121112.0011.1398300mg/l1.1120000
11/1/2012883.0011.1363300mg/l0.8830000
12/1/2012994.0011.0646700mg/l0.9940000
1/1/2013769.0010.9921700mg/l0.7690000
2/1/2013590.0010.9041700mg/l0.5900000
3/1/2013707.0010.8425000mg/l0.7070000
4/1/2013302.0010.7075000mg/l0.3020000
5/1/2013744.0010.6843300mg/l0.7440000
6/1/2013970.0010.6803300mg/l0.9700000
7/1/20131406.0010.7865000mg/l1.4060000
8/1/20131222.0010.8918300mg/l1.2220000
9/1/20131589.0011.0388300mg/l1.5890000
10/1/20131153.0011.1806700mg/l1.1530000
12/1/2013926.0011.2592000mg/l0.9260000
Pass

Phosphorus, Total

Trend analysis shows a weak decreasing trend.
Score: Pass
Units: mg/l Year
2013
Historical
period of record
High 0.2 4.6
Mean 0.1546 0.2156 0.45321274
Low 0.132 0.055
No. of Samples 7 123

Five-year Trend Graph

     
1/1/200974.0010.0740000mg/l0.0740000
2/1/200973.0010.0735000mg/l0.0730000
3/1/2009661.0010.2693300mg/l0.6610000
4/1/2009208.0010.2540000mg/l0.2080000
5/1/200998.0010.2228000mg/l0.0980000
6/1/2009150.0010.2106700mg/l0.1500000
7/1/2009160.0010.2250000mg/l0.1600000
8/1/2009123.0010.2333300mg/l0.1230000
9/1/2009113.0010.1420000mg/l0.1130000
10/1/200992.0010.1226700mg/l0.0920000
11/1/200999.0010.1228300mg/l0.0990000
12/1/200980.0010.1111700mg/l0.0800000
1/1/201060.0010.0945000mg/l0.0600000
2/1/201079.0010.0871700mg/l0.0790000
3/1/2010130.0010.0900000mg/l0.1300000
4/1/201098.0010.0910000mg/l0.0980000
6/1/20104610.0010.9954000mg/l4.6100000
7/1/2010470.0011.0774000mg/l0.4700000
9/1/2010233.5021.3528800mg/l0.2312300
10/1/2010186.0011.3748800mg/l0.1860000
11/1/2010152.0011.1303000mg/l0.1520000
12/1/2010181.0010.2445000mg/l0.1810000
1/1/201191.0010.1687000mg/l0.0910000
2/1/201199.0010.1570800mg/l0.0990000
3/1/201188.0010.1328300mg/l0.0880000
4/1/2011110.0010.1201700mg/l0.1100000
5/1/2011120.0010.1148300mg/l0.1200000
6/1/2011129.0010.1061700mg/l0.1290000
7/1/2011125.0010.1118300mg/l0.1250000
8/1/2011163.0010.1225000mg/l0.1630000
9/1/2011150.0010.1328300mg/l0.1500000
10/1/2011153.0010.1400000mg/l0.1530000
11/1/2011288.0010.1680000mg/l0.2880000
12/1/201177.0010.1593300mg/l0.0770000
1/1/201291.0010.1536700mg/l0.0910000
2/1/2012114.0010.1455000mg/l0.1140000
3/1/2012175.0010.1496700mg/l0.1750000
4/1/2012118.0010.1438300mg/l0.1180000
5/1/2012463.0010.1730000mg/l0.4630000
6/1/2012232.0010.1988300mg/l0.2320000
7/1/2012281.0010.2305000mg/l0.2810000
8/1/2012206.0010.2458300mg/l0.2060000
9/1/2012130.0010.2383300mg/l0.1300000
10/1/2012136.0010.2413300mg/l0.1360000
11/1/201264.0010.1748300mg/l0.0640000
12/1/201292.0010.1515000mg/l0.0920000
1/1/201377.0010.1175000mg/l0.0770000
2/1/201373.0010.0953300mg/l0.0730000
3/1/201353.0010.0825000mg/l0.0530000
4/1/2013192.0010.0918300mg/l0.1920000
5/1/2013164.0010.1085000mg/l0.1640000
6/1/2013150.0010.1181700mg/l0.1500000
7/1/2013144.0010.1293300mg/l0.1440000
8/1/2013137.0010.1400000mg/l0.1370000
9/1/2013172.0010.1598300mg/l0.1720000
10/1/2013132.0010.1498300mg/l0.1320000
12/1/201390.0010.1350000mg/l0.0900000
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
2013
Historical
period of record
High 89.6 920.0
Mean 55.01 48.33 65.35813
Low 21.20 0.00
No. of Samples 5 224

Five-year Trend Graph

     
1/1/200977.40177.4000000percent (%)77.4000000
2/1/200990.60184.0000000percent (%)90.6000000
3/1/2009101.10189.7000000percent (%)101.1000000
4/1/200988.80189.4800000percent (%)88.8000000
6/1/200974.70186.5200000percent (%)74.7000000
7/1/2009113.50193.7400000percent (%)113.5000000
9/1/200957.00183.5000000percent (%)57.0000000
10/1/200935.90170.2800000percent (%)35.9000000
11/1/200977.60171.7400000percent (%)77.6000000
1/1/2010103.20168.4300000percent (%)103.2000000
2/1/2010108.00176.3400000percent (%)108.0000000
3/1/201097.00184.3400000percent (%)97.0000000
4/1/201084.60194.0800000percent (%)84.6000000
9/1/201062.00173.3000000percent (%)62.0000000
11/1/201070.90166.4500000percent (%)70.9000000
1/1/201198.00176.9700000percent (%)98.0000000
2/1/201199.90182.7000000percent (%)99.9000000
3/1/2011103.00192.9500000percent (%)103.0000000
4/1/2011108.80196.1200000percent (%)108.8000000
5/1/201178.60197.6600000percent (%)78.6000000
1/1/2012112.201112.2000000percent (%)112.2000000
2/1/2012118.701115.4500000percent (%)118.7000000
3/1/2012175.301135.4000000percent (%)175.3000000
4/1/2012133.001134.8000000percent (%)133.0000000
5/1/2012115.401130.9200000percent (%)115.4000000
7/1/201247.901118.0600000percent (%)47.9000000
8/1/201257.901105.9000000percent (%)57.9000000
9/1/201260.50182.9400000percent (%)60.5000000
10/1/201254.70167.2800000percent (%)54.7000000
11/1/201277.70159.7400000percent (%)77.7000000
12/1/201279.40163.0200000percent (%)79.4000000
1/1/201372.20167.0700000percent (%)72.2000000
2/1/201355.50166.6700000percent (%)55.5000000
3/1/201389.60171.5200000percent (%)89.6000000
4/1/201321.20165.9300000percent (%)21.2000000
5/1/201366.20164.0200000percent (%)66.2000000
Target
percent (%)
Threshold
56.00 percent (%)

Oysters

Units: Year
2013
Historical
period of record
High
Mean
Low
No. of Samples

Five-year Trend Graph

     
1/1/200680.90380.9000000%80.9000000
1/1/200776.86376.8600000%76.8600000
1/1/200871.52371.5200000%71.5200000
1/1/200975.39375.3900000%75.3900000
1/1/201071.88371.8800000%71.8800000
1/1/201185.24385.2400000%85.2400000
1/1/201381.26481.2600000%81.2600000

Rainfall

Units: inches Year
2013
Historical
period of record
High 40.0 48.4
Mean 13.703171787326
Low 7.22
No. of Samples 359 4,683

Five-year Trend Graph

     
1/1/20090.78310.7800000inches0.7800000
2/1/20090.54280.5400000inches0.5400000
3/1/20090.82310.8200000inches0.8200000
4/1/20091.70301.7000000inches1.7000000
5/1/20094.35314.3500000inches4.3500000
6/1/20094.71304.7100000inches4.7100000
7/1/20093.64313.6400000inches3.6400000
8/1/20093.27313.2700000inches3.2700000
9/1/20096.63306.6300000inches6.6300000
10/1/20091.07311.0700000inches1.0700000
11/1/20095.48305.4800000inches5.4800000
12/1/20094.78314.7800000inches4.7800000
1/1/20103.32313.3200000inches3.3200000
2/1/20102.12282.1200000inches2.1200000
3/1/20107.03317.0300000inches7.0300000
4/1/20105.31305.3100000inches5.3100000
5/1/20100.74310.7400000inches0.7400000
6/1/20103.84303.8400000inches3.8400000
7/1/20105.32315.3200000inches5.3200000
8/1/20108.32318.3200000inches8.3200000
9/1/20103.46303.4600000inches3.4600000
10/1/20100.00310.0000000inches0.0000000
11/1/20100.48300.4800000inches0.4800000
12/1/20100.84310.8400000inches0.8400000
1/1/20112.37312.3700000inches2.3700000
2/1/20110.39280.3900000inches0.3900000
3/1/20119.44319.4400000inches9.4400000
4/1/20111.24301.2400000inches1.2400000
5/1/20112.78312.7800000inches2.7800000
6/1/20111.52301.5200000inches1.5200000
7/1/20115.35315.3500000inches5.3500000
8/1/20116.03316.0300000inches6.0300000
9/1/20114.97304.9700000inches4.9700000
10/1/20111.20301.2000000inches1.2000000
11/1/20112.07302.0700000inches2.0700000
12/1/20110.13300.1300000inches0.1300000
1/1/20120.68290.6800000inches0.6800000
2/1/20121.37291.3700000inches1.3700000
3/1/20121.61311.6100000inches1.6100000
4/1/20122.24242.2400000inches2.2400000
5/1/20122.41312.4100000inches2.4100000
6/1/201216.503016.5000000inches16.5000000
7/1/20127.05317.0500000inches7.0500000
8/1/20127.43317.4300000inches7.4300000
9/1/20124.49304.4900000inches4.4900000
10/1/20122.65312.6500000inches2.6500000
11/1/20120.08280.0800000inches0.0800000
12/1/20121.93311.9300000inches1.9300000
1/1/20130.31310.3100000inches0.3100000
2/1/20131.07231.0700000inches1.0700000
3/1/20131.57301.5700000inches1.5700000
4/1/20133.19303.1900000inches3.1900000
5/1/20131.68311.6800000inches1.6800000
6/1/20138.86308.8600000inches8.8600000
7/1/20134.29314.2900000inches4.2900000
8/1/20138.42318.4200000inches8.4200000
9/1/20138.78308.7800000inches8.7800000
10/1/20130.95310.9500000inches0.9500000
11/1/20130.76300.7600000inches0.7600000
12/1/20130.13310.1300000inches0.1300000
Target
inches
Threshold
inches

Salinity

Units: PSS Year
2013
Historical
period of record
High 0.7 29.5
Mean 0.64 1.69 6.45163
Low 0.59 0.00
No. of Samples 5 170

Five-year Trend Graph

     
1/1/20090.6210.6200000PSS0.6200000
2/1/20090.5910.6100000PSS0.5900000
3/1/200914.7515.3200000PSS14.7500000
4/1/20090.6214.1500000PSS0.6200000
6/1/20090.7113.4600000PSS0.7100000
7/1/20090.4913.4300000PSS0.4900000
9/1/20090.4510.5700000PSS0.4500000
10/1/200914.4314.0200000PSS14.4300000
11/1/20090.4513.3100000PSS0.4500000
1/1/20100.4713.9500000PSS0.4700000
2/1/20100.5113.2600000PSS0.5100000
3/1/20100.4013.2500000PSS0.4000000
4/1/20100.4110.4500000PSS0.4100000
9/1/20100.4710.4400000PSS0.4700000
11/1/201016.1918.3300000PSS16.1900000
1/1/20110.6515.7700000PSS0.6500000
2/1/20110.6414.4900000PSS0.6400000
3/1/20110.6014.5200000PSS0.6000000
4/1/20110.6113.7400000PSS0.6100000
5/1/20110.6010.6200000PSS0.6000000
1/1/20120.6810.6800000PSS0.6800000
2/1/20120.7410.7100000PSS0.7400000
3/1/20120.6710.7000000PSS0.6700000
4/1/20120.6510.6900000PSS0.6500000
5/1/20120.7610.7000000PSS0.7600000
7/1/20120.3310.6300000PSS0.3300000
8/1/20120.2710.5400000PSS0.2700000
9/1/20120.5210.5100000PSS0.5200000
10/1/20120.4610.4700000PSS0.4600000
11/1/20121.1510.5500000PSS1.1500000
12/1/20120.6410.5600000PSS0.6400000
1/1/20130.6310.6100000PSS0.6300000
2/1/20130.6810.6800000PSS0.6800000
3/1/20130.6510.7000000PSS0.6500000
4/1/20130.5910.7200000PSS0.5900000
5/1/20130.6310.6400000PSS0.6300000

Turbidity

Units: NTU Year
2013
Historical
period of record
High 4.9 42.0
Mean 1.38 3.39 4.14933
Low 0.30 0.30
No. of Samples 11 227

Five-year Trend Graph

     
1/1/20091.4811.4800000NTU1.4800000
2/1/20091.0911.2900000NTU1.0900000
3/1/200913.8015.4600000NTU13.8000000
4/1/20092.3014.6700000NTU2.3000000
5/1/20091.8314.1000000NTU1.8300000
6/1/20091.2113.6200000NTU1.2100000
7/1/20091.2313.5800000NTU1.2300000
8/1/20091.2713.6100000NTU1.2700000
9/1/20094.4012.0400000NTU4.4000000
10/1/20091.6811.9400000NTU1.6800000
11/1/20094.7012.4200000NTU4.7000000
12/1/20093.4012.7800000NTU3.4000000
1/1/20103.8013.2100000NTU3.8000000
2/1/20103.6013.6000000NTU3.6000000
3/1/20104.4013.6000000NTU4.4000000
4/1/20102.6013.7500000NTU2.6000000
6/1/201042.00111.2800000NTU42.0000000
7/1/201012.60113.0400000NTU12.6000000
9/1/20106.75215.9900000NTU6.5200000
10/1/20104.20116.3900000NTU4.2000000
11/1/20103.60113.8300000NTU3.6000000
12/1/20103.1016.0500000NTU3.1000000
1/1/20114.2014.3700000NTU4.2000000
2/1/20112.5014.0600000NTU2.5000000
3/1/20112.8013.4000000NTU2.8000000
4/1/20114.4013.4300000NTU4.4000000
5/1/20113.7013.4500000NTU3.7000000
6/1/20112.6013.3700000NTU2.6000000
7/1/20112.7013.1200000NTU2.7000000
8/1/20113.8013.3300000NTU3.8000000
9/1/20117.2014.0700000NTU7.2000000
10/1/20118.2014.7000000NTU8.2000000
11/1/201134.0019.7500000NTU34.0000000
12/1/20111.7419.6100000NTU1.7400000
1/1/20122.2019.5200000NTU2.2000000
2/1/20122.9019.3700000NTU2.9000000
3/1/20124.0018.8400000NTU4.0000000
4/1/20122.8017.9400000NTU2.8000000
5/1/20122.8012.7400000NTU2.8000000
6/1/20123.9013.1000000NTU3.9000000
7/1/20121.9013.0500000NTU1.9000000
8/1/20123.6013.1700000NTU3.6000000
9/1/20125.2013.3700000NTU5.2000000
10/1/20122.9013.3800000NTU2.9000000
11/1/20121.1013.1000000NTU1.1000000
12/1/20121.4012.6800000NTU1.4000000
1/1/20130.9012.5200000NTU0.9000000
2/1/20130.7012.0300000NTU0.7000000
3/1/20130.3011.2200000NTU0.3000000
4/1/20130.4010.8000000NTU0.4000000
5/1/20130.3010.6700000NTU0.3000000
6/1/20133.1010.9500000NTU3.1000000
7/1/20133.7011.4200000NTU3.7000000
8/1/20133.9011.9500000NTU3.9000000
9/1/20134.9012.7200000NTU4.9000000
10/1/20133.4013.2200000NTU3.4000000
12/1/20132.0013.5800000NTU2.0000000
Other Measures of Creek Health

Oysters

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

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Most Recent Sarasota County Oyster Monitoring Program Data
Icon Site ID Year Dead Live Total % Live
1 CAT1 2013 0 0 0 0
2 NC1 2013 116 540 656 82
3 NC2 2013 0 0 0 0
4 NC2A 2013 21 54 75 72

Impervious Features

Catfish 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 Catfish Creek Basin is covered by impervious surfaces.

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Land Use / Land Cover

Catfish 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.