Skip Navigation LinksHomeCreek ConditionsCreek Conditions Report

Matheny Creek Condition Report for 2011

View 2014 Report View 2015 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: 1,724 acres
  • Location: Central Sarasota County
  • Discharges into: Little Sarasota Bay

Drainage from the Matheny Creek Basin is provided by two major man-made canals referenced herein as the Matheny Creek Main, which extends easterly from U.S. 41 to the headwaters of the basin and the Denham Acres Lateral which extends north from U.S. Highway 41 to Clark Road. Two water level control structures (MC-1 and MC-2) are located in the Matheny Creek Main and one water level control structure (DL-1) is located in the Denham Acres Lateral. A network of other laterals, branches and feeder ditches in the basin conduct stormwater into these two primary drainage systems. These other man-made ditches are the Breakwater Lateral, the Coral Lakes Branch, the Gulf Gate Branch, the Williamsburg Branch and the Shadow Lakes Feeder. For basin details see: Matheny Creek Basin Master Plan (1994)

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:
  • 1975B
Pass

Chlorophyll a

Score: Pass
Units: mg/l Year
2011
Historical
period of record
High 0.021 0.056
Mean 0.0031 0.0027 0.00719152
Low 0.0011 0.0006
No. of Samples 72 242

Five-year Trend Graph

      
1/1/20073.4520.0034500mg/l0.0022400
2/1/20072.1620.0028100mg/l0.0020400
3/1/20072.0520.0025500mg/l0.0019400
4/1/20071.1720.0022100mg/l0.0011300
5/1/20076.2420.0030100mg/l0.0061900
6/1/20078.9920.0040100mg/l0.0063000
7/1/20072.8820.0039200mg/l0.0028000
8/1/20071.8020.0038600mg/l0.0017400
9/1/200710.9220.0053300mg/l0.0101700
10/1/200713.5220.0073900mg/l0.0119200
11/1/20071.3720.0065800mg/l0.0013700
12/1/20071.9820.0054100mg/l0.0018400
1/1/20082.9820.0054300mg/l0.0027600
2/1/20081.2520.0053400mg/l0.0010600
3/1/20081.7120.0038000mg/l0.0016400
4/1/20081.2220.0017500mg/l0.0010200
5/1/20082.0520.0018700mg/l0.0019000
6/1/20081.3420.0017600mg/l0.0013100
7/1/20082.9620.0017600mg/l0.0028500
8/1/20082.4020.0019500mg/l0.0023800
9/1/20083.7320.0022800mg/l0.0036800
10/1/20081.5920.0023500mg/l0.0015700
11/1/20081.6020.0022700mg/l0.0015500
12/1/20084.3020.0027600mg/l0.0039600
1/1/200920.7820.0057300mg/l0.0065200
2/1/20091.8620.0056400mg/l0.0018500
3/1/20092.3520.0054100mg/l0.0023000
4/1/20094.6220.0059200mg/l0.0034400
5/1/20093.4420.0062300mg/l0.0032000
6/1/20093.2420.0060500mg/l0.0032400
7/1/20093.0020.0030900mg/l0.0029500
8/1/200911.1520.0046300mg/l0.0111400
9/1/20094.4620.0049900mg/l0.0043800
10/1/20092.4720.0046300mg/l0.0023000
11/1/20093.0320.0045600mg/l0.0030200
12/1/20092.7920.0044800mg/l0.0027200
1/1/20101.4960.0042300mg/l0.0014500
2/1/20101.6160.0026400mg/l0.0016100
3/1/20104.0860.0025800mg/l0.0039900
4/1/20104.2760.0028800mg/l0.0042300
6/1/201010.4860.0043900mg/l0.0081900
7/1/20102.9660.0046800mg/l0.0027800
8/1/20107.2340.0058000mg/l0.0071400
9/1/201013.93120.0077700mg/l0.0057600
10/1/20101.9760.0073100mg/l0.0019300
11/1/20102.3160.0064800mg/l0.0022300
12/1/20100.9260.0048900mg/l0.0009100
1/1/20113.0460.0049000mg/l0.0030400
2/1/20112.4360.0041000mg/l0.0020800
3/1/20111.2460.0019900mg/l0.0012300
4/1/20112.4560.0020700mg/l0.0023900
5/1/20111.5960.0019500mg/l0.0015100
6/1/201113.4760.0040400mg/l0.0111700
7/1/20114.8360.0043400mg/l0.0041200
8/1/20117.9560.0052600mg/l0.0069500
9/1/20113.0760.0055600mg/l0.0026200
10/1/20113.2360.0056900mg/l0.0029300
11/1/20116.0760.0064400mg/l0.0044400
12/1/20112.6960.0046400mg/l0.0022400
Target
mg/l
Threshold
0.02 mg/l
Pass

Nitrogen, Total

Score: Pass
Units: mg/l Year
2011
Historical
period of record
High 1.18 2.99
Mean 0.6608 0.7094 0.35603227
Low 0.446 0.211
No. of Samples 24 150

Five-year Trend Graph

      
1/1/2007788.0020.7880000mg/l0.7846100
2/1/2007621.5020.7047500mg/l0.6195300
3/1/2007738.5020.7160000mg/l0.7312100
4/1/2007593.5020.6853800mg/l0.5856000
5/1/2007708.5020.6900000mg/l0.7082800
6/1/2007585.5020.6725800mg/l0.5833200
7/1/2007840.5020.6813300mg/l0.8377900
8/1/2007676.0020.6904200mg/l0.6759900
9/1/2007763.0020.6945000mg/l0.7492900
10/1/20071247.5020.8035000mg/l1.2239000
11/1/2007392.5020.7508300mg/l0.3912300
12/1/2007423.0020.7237500mg/l0.4105200
1/1/2008454.0020.6593300mg/l0.4540000
2/1/2008468.5020.6247500mg/l0.4622100
3/1/2008225.0020.5350800mg/l0.2245600
4/1/2008597.5020.4267500mg/l0.5974700
5/1/2008595.0020.4605000mg/l0.5930600
6/1/2008542.5020.4804200mg/l0.5424800
7/1/2008744.5020.5288300mg/l0.7191800
8/1/2008513.5020.5363300mg/l0.5115700
9/1/2008867.0020.6433300mg/l0.8654400
10/1/2008529.0020.6319200mg/l0.5289700
11/1/2008416.0020.6020800mg/l0.4132200
12/1/2008648.0020.6196700mg/l0.6387700
1/1/2009584.5020.5930000mg/l0.5295100
2/1/2009430.0020.5790800mg/l0.4215200
3/1/2009490.0020.5162500mg/l0.4899300
4/1/2009496.0020.5107500mg/l0.4907500
5/1/2009578.5020.5378300mg/l0.5776400
6/1/2009638.5020.5362500mg/l0.6303800
7/1/2009619.5020.5420800mg/l0.6172700
8/1/2009861.5020.6140000mg/l0.8561900
9/1/20091067.0020.7101700mg/l1.0626700
10/1/2009587.5020.7254200mg/l0.5863700
11/1/20091235.5020.8349200mg/l1.2304600
12/1/20091176.0020.9245000mg/l1.1751000
1/1/20101098.5021.0043300mg/l1.0964900
2/1/2010676.5020.9735000mg/l0.6700100
3/1/20101105.5020.9799200mg/l1.0769800
4/1/2010823.0021.0191700mg/l0.8217700
6/1/2010917.5020.9242000mg/l0.8983500
7/1/2010604.5020.8254000mg/l0.6043000
9/1/20101017.7540.8406900mg/l0.9860500
10/1/2010593.0020.7831900mg/l0.5908900
11/1/20101322.5020.8910500mg/l1.0840700
12/1/2010436.0020.7947500mg/l0.4306600
1/1/2011756.0020.8250500mg/l0.7403600
2/1/2011587.0020.7853800mg/l0.5840300
3/1/2011543.0020.7062500mg/l0.5429700
4/1/2011624.5020.7115000mg/l0.6243700
5/1/2011604.5020.5918300mg/l0.6045000
6/1/2011992.5020.6845800mg/l0.9813300
7/1/2011610.0020.6602500mg/l0.6048600
8/1/20111149.0020.7539200mg/l1.1485800
9/1/2011826.5020.8011700mg/l0.8178200
10/1/2011522.0020.7840800mg/l0.5205400
11/1/2011570.0020.7783300mg/l0.5650400
12/1/2011478.5020.6926700mg/l0.4774000
Pass

Phosphorus, Total

Score: Pass
Units: mg/l Year
2011
Historical
period of record
High 0.373 1.60
Mean 0.1697 0.1857 0.20378968
Low 0.041 0.041
No. of Samples 72 246

Five-year Trend Graph

      
1/1/2007169.5020.1695000mg/l0.1657400
2/1/2007132.0020.1507500mg/l0.1303200
3/1/2007232.5020.1780000mg/l0.2262600
4/1/2007183.5020.1793800mg/l0.1663300
5/1/2007120.5020.1676000mg/l0.1202000
6/1/2007104.5020.1570800mg/l0.0999500
7/1/2007281.0020.1756700mg/l0.2806000
8/1/2007282.5020.2007500mg/l0.2640200
9/1/2007405.0020.2295000mg/l0.4049800
10/1/2007450.5020.2740000mg/l0.4235400
11/1/2007186.0020.2849200mg/l0.1834000
12/1/2007130.5020.2892500mg/l0.1304200
1/1/2008142.5020.2661700mg/l0.1410200
2/1/2008323.0020.2729200mg/l0.3121500
3/1/2008179.0020.2352500mg/l0.1718700
4/1/2008113.0020.1790000mg/l0.1064200
5/1/2008164.5020.1754200mg/l0.1589200
6/1/2008132.0020.1756700mg/l0.1283100
7/1/2008300.0020.2019200mg/l0.2974500
8/1/2008331.5020.2033300mg/l0.3007200
9/1/2008384.5020.2375800mg/l0.3826700
10/1/200896.0020.2347500mg/l0.0915200
11/1/200898.5020.2237500mg/l0.0972700
12/1/2008204.5020.2358300mg/l0.2044800
1/1/2009132.0020.2078300mg/l0.1175800
2/1/2009124.0020.1732500mg/l0.1177100
3/1/2009170.0020.1375000mg/l0.1697600
4/1/2009221.0020.1583300mg/l0.1362500
5/1/2009217.5020.1781700mg/l0.1949200
6/1/2009424.0020.2147500mg/l0.4161900
7/1/2009333.5020.2483300mg/l0.3270000
8/1/2009291.5020.2762500mg/l0.2899000
9/1/2009385.0020.3120800mg/l0.3791300
10/1/2009130.5020.2970000mg/l0.1226800
11/1/2009241.0020.3009200mg/l0.2367600
12/1/2009238.5020.2700000mg/l0.2259000
1/1/2010110.0060.2327500mg/l0.0901700
2/1/2010159.5060.2107500mg/l0.1467400
3/1/2010244.5060.1873300mg/l0.2338100
4/1/2010281.5060.2125000mg/l0.2558000
6/1/2010179.5060.1950000mg/l0.1519900
7/1/2010219.5060.2169000mg/l0.1971500
8/1/2010428.0040.2706000mg/l0.4278000
9/1/2010602.50120.3422000mg/l0.4121400
10/1/2010182.5060.3224000mg/l0.1772400
11/1/2010201.0060.3021700mg/l0.1856700
12/1/201053.5060.2811700mg/l0.0535000
1/1/2011203.0060.2784200mg/l0.2030000
2/1/2011108.5060.2251700mg/l0.1044100
3/1/2011183.5060.1553300mg/l0.1472500
4/1/201186.0060.1392500mg/l0.0738900
5/1/201181.5060.1193300mg/l0.0707200
6/1/2011264.0060.1544200mg/l0.2618000
7/1/2011181.0060.1507500mg/l0.1791200
8/1/2011351.5060.1912500mg/l0.3508400
9/1/2011272.0060.2060000mg/l0.2643600
10/1/2011238.5060.2314200mg/l0.2194100
11/1/2011224.0060.2551700mg/l0.1962400
12/1/2011208.0060.2458300mg/l0.1865500
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
2011
Historical
period of record
High 134.60 179.10
Mean 77.0 77.11 33.54189
Low 47.50 4.97
No. of Samples 72 292

Five-year Trend Graph

      
1/1/200777.15277.1500000percent (%)76.4000000
2/1/200786.45281.8000000percent (%)85.7800000
3/1/200762.84275.4800000percent (%)24.4900000
4/1/200724.75262.8000000percent (%)16.8300000
5/1/200733.50256.9400000percent (%)33.4200000
6/1/200731.90252.7700000percent (%)31.2900000
7/1/200758.10249.5900000percent (%)57.4100000
8/1/200762.20245.5500000percent (%)60.3100000
9/1/200762.00245.4100000percent (%)59.3900000
10/1/2007114.50260.3700000percent (%)113.9200000
11/1/2007104.60272.2200000percent (%)104.6000000
12/1/200775.15279.4300000percent (%)75.1300000
1/1/200861.40279.9800000percent (%)59.7400000
2/1/200836.30275.6600000percent (%)32.2800000
3/1/200850.55273.7500000percent (%)50.5100000
4/1/200880.70268.1200000percent (%)77.4700000
5/1/200878.85263.8300000percent (%)78.3400000
6/1/200879.80264.6000000percent (%)72.2400000
7/1/2008131.90276.3500000percent (%)123.1700000
8/1/200859.75280.2600000percent (%)50.0400000
9/1/200862.90182.3200000percent (%)62.9000000
10/1/2008101.55285.7900000percent (%)101.4500000
11/1/2008100.40289.3800000percent (%)100.3000000
12/1/200861.05286.2600000percent (%)58.6800000
1/1/200964.20274.9800000percent (%)62.3000000
2/1/200965.95276.0100000percent (%)63.1700000
3/1/200993.05281.0300000percent (%)88.7800000
4/1/2009147.80188.7400000percent (%)147.8000000
5/1/200953.30280.8900000percent (%)53.3000000
6/1/200973.75283.0100000percent (%)70.9200000
7/1/200948.80280.4400000percent (%)48.3100000
8/1/200996.40285.5200000percent (%)96.4000000
9/1/200969.20281.5400000percent (%)68.4000000
10/1/200948.95265.0700000percent (%)47.9900000
11/1/200983.40270.0800000percent (%)83.2300000
12/1/2009132.60279.8900000percent (%)132.4700000
1/1/2010112.80690.5600000percent (%)111.7700000
2/1/2010130.45696.2300000percent (%)127.8400000
3/1/2010121.956105.0300000percent (%)121.8200000
4/1/2010113.556115.7900000percent (%)110.7300000
7/1/201073.0316109.7500000percent (%)72.8200000
9/1/2010132.9824106.5200000percent (%)131.6500000
10/1/201072.501692.8400000percent (%)69.4900000
11/1/201076.521688.7600000percent (%)68.0400000
12/1/201098.301690.6700000percent (%)96.7700000
1/1/201179.06891.8700000percent (%)79.0600000
2/1/201190.841691.7000000percent (%)90.5600000
3/1/201174.891682.0200000percent (%)72.7700000
4/1/2011102.841687.0800000percent (%)97.8100000
5/1/201154.221683.3600000percent (%)53.8100000
Target
percent (%)
Threshold
38.00 percent (%)

Rainfall

Units: inches Year
2011
Historical
period of record
High 40.27 47.76
Mean 13.139382170008
Low 7.86
No. of Samples 363 4,901

Five-year Trend Graph

      
1/1/20071.93311.9300000inches1.9300000
2/1/20073.13233.1300000inches3.1300000
3/1/20070.55310.5500000inches0.5500000
4/1/20072.73292.7300000inches2.7300000
5/1/20070.25310.2500000inches0.2500000
6/1/20072.81302.8100000inches2.8100000
7/1/20074.02314.0200000inches4.0200000
8/1/20075.53315.5300000inches5.5300000
9/1/20077.21307.2100000inches7.2100000
10/1/20070.64210.6400000inches0.6400000
11/1/20070.97300.9700000inches0.9700000
12/1/20070.89310.8900000inches0.8900000
1/1/20082.05312.0500000inches2.0500000
2/1/20081.62291.6200000inches1.6200000
3/1/20082.23312.2300000inches2.2300000
4/1/20083.18303.1800000inches3.1800000
5/1/20083.45313.4500000inches3.4500000
6/1/20084.47304.4700000inches4.4700000
7/1/20086.61316.6100000inches6.6100000
8/1/20086.52316.5200000inches6.5200000
9/1/20089.07309.0700000inches9.0700000
10/1/20082.38312.3800000inches2.3800000
11/1/20080.53300.5300000inches0.5300000
12/1/20081.73311.7300000inches1.7300000
1/1/20090.90310.9000000inches0.9000000
2/1/20090.65280.6500000inches0.6500000
3/1/20091.44311.4400000inches1.4400000
4/1/20091.19301.1900000inches1.1900000
5/1/20092.98312.9800000inches2.9800000
6/1/20091.96301.9600000inches1.9600000
7/1/20092.75312.7500000inches2.7500000
8/1/20095.46315.4600000inches5.4600000
9/1/20098.88308.8800000inches8.8800000
10/1/20091.53311.5300000inches1.5300000
11/1/20096.01306.0100000inches6.0100000
12/1/20095.36315.3600000inches5.3600000
1/1/20103.56313.5600000inches3.5600000
2/1/20103.23283.2300000inches3.2300000
3/1/20106.54316.5400000inches6.5400000
4/1/20104.83304.8300000inches4.8300000
5/1/20102.13312.1300000inches2.1300000
6/1/20102.52302.5200000inches2.5200000
7/1/20104.35314.3500000inches4.3500000
8/1/201010.753110.7500000inches10.7500000
9/1/20103.12303.1200000inches3.1200000
10/1/20100.00310.0000000inches0.0000000
11/1/20101.28301.2800000inches1.2800000
12/1/20101.27311.2700000inches1.2700000
1/1/20112.77312.7700000inches2.7700000
2/1/20110.39280.3900000inches0.3900000
3/1/20117.36317.3600000inches7.3600000
4/1/20110.88300.8800000inches0.8800000
5/1/20112.51312.5100000inches2.5100000
6/1/20112.94302.9400000inches2.9400000
7/1/20116.35316.3500000inches6.3500000
8/1/20119.13319.1300000inches9.1300000
9/1/20114.36304.3600000inches4.3600000
10/1/20111.40301.4000000inches1.4000000
11/1/20111.76301.7600000inches1.7600000
12/1/20110.42300.4200000inches0.4200000
Target
inches
Threshold
inches

Salinity

Units: PSS Year
2011
Historical
period of record
High 0.70 21.86
Mean 0.51 0.48 1.75953
Low 0.20 0.11
No. of Samples 27 192

Five-year Trend Graph

      
1/1/20070.5320.5300000PSS0.5300000
2/1/20070.5320.5300000PSS0.5200000
3/1/20070.6020.5500000PSS0.5900000
4/1/20070.5120.5400000PSS0.5000000
5/1/20070.6320.5600000PSS0.6000000
6/1/20070.5420.5600000PSS0.5300000
7/1/20070.4420.5400000PSS0.4300000
8/1/20070.5120.5400000PSS0.5000000
9/1/20070.3620.5000000PSS0.3500000
10/1/20070.3320.4700000PSS0.3300000
11/1/20070.3520.4200000PSS0.3500000
12/1/20070.5820.4300000PSS0.5700000
1/1/20080.5520.4500000PSS0.5500000
2/1/20080.5720.4600000PSS0.5600000
3/1/200811.2322.2700000PSS3.5900000
4/1/20080.6322.3200000PSS0.6200000
5/1/20080.5522.3500000PSS0.5500000
6/1/20080.3522.3100000PSS0.3400000
7/1/20080.4422.3000000PSS0.4300000
8/1/20080.4822.2800000PSS0.4800000
9/1/20080.4810.4900000PSS0.4800000
10/1/20080.5520.4800000PSS0.5500000
11/1/20080.5820.4800000PSS0.5700000
12/1/20080.4320.4900000PSS0.4200000
1/1/20090.4220.4900000PSS0.4000000
2/1/20090.5820.5100000PSS0.5700000
3/1/20090.5220.5100000PSS0.5100000
4/1/20090.7110.5400000PSS0.7100000
5/1/20090.5120.5300000PSS0.5000000
6/1/20090.3320.5100000PSS0.3200000
7/1/20090.4220.5100000PSS0.4100000
8/1/20090.3420.4700000PSS0.3300000
9/1/20090.4620.4600000PSS0.4600000
10/1/20090.6020.4400000PSS0.6000000
11/1/20090.4420.4300000PSS0.4300000
12/1/20090.4820.4600000PSS0.4800000
1/1/20100.5360.4800000PSS0.5300000
2/1/20100.5460.5100000PSS0.5300000
3/1/20100.5060.5200000PSS0.4900000
4/1/20100.4360.4900000PSS0.4200000
7/1/20100.4160.4700000PSS0.4000000
9/1/20100.4490.4300000PSS0.4300000
10/1/20100.3760.4100000PSS0.2600000
11/1/20100.5760.4500000PSS0.5600000
12/1/20100.4960.4600000PSS0.4800000
1/1/20110.2030.4100000PSS0.2000000
2/1/20110.5760.4400000PSS0.5700000
3/1/20110.5960.4700000PSS0.5800000
4/1/20110.5760.5000000PSS0.5600000
5/1/20110.6060.5000000PSS0.5900000

Turbidity

Units: NTU Year
2011
Historical
period of record
High 7.80 54.40
Mean 1.76 1.96 4.32079
Low 0.64 0.60
No. of Samples 72 242

Five-year Trend Graph

      
1/1/20073.8523.8500000NTU3.7500000
2/1/20071.7522.8000000NTU1.7300000
3/1/20073.2022.9300000NTU3.0400000
4/1/20072.3022.7800000NTU2.2200000
5/1/20071.7522.5700000NTU1.7300000
6/1/20072.6522.5800000NTU2.2200000
7/1/20071.1622.1400000NTU1.1400000
8/1/20072.3122.2300000NTU2.1600000
9/1/20071.3021.9100000NTU1.3000000
10/1/20071.5521.7900000NTU1.5500000
11/1/20071.7721.7900000NTU1.7500000
12/1/20072.4521.7600000NTU2.4500000
1/1/20082.0021.9000000NTU1.9700000
2/1/20082.5621.9400000NTU2.4100000
3/1/20082.1422.0800000NTU2.0300000
4/1/20082.0522.1600000NTU2.0400000
5/1/20082.0422.2100000NTU2.0300000
6/1/20081.3122.0200000NTU1.2300000
7/1/20081.5721.9500000NTU1.5200000
8/1/20081.5221.7700000NTU1.3000000
9/1/20081.6521.6900000NTU1.6500000
10/1/20081.6621.6300000NTU1.5600000
11/1/20082.3421.6800000NTU2.1800000
12/1/20081.9321.7800000NTU1.8400000
1/1/20093.6522.1300000NTU3.5700000
2/1/20092.4822.2900000NTU2.4200000
3/1/20091.7722.3100000NTU1.7600000
4/1/20092.1222.3800000NTU1.9600000
5/1/20091.4022.2300000NTU1.3000000
6/1/20091.0322.0800000NTU1.0200000
7/1/20091.6621.7400000NTU1.6000000
8/1/20091.9421.6500000NTU1.9300000
9/1/20091.7121.6400000NTU1.7100000
10/1/20093.0521.8000000NTU2.9800000
11/1/20091.4921.8100000NTU1.4700000
12/1/20091.7221.9300000NTU1.6900000
1/1/20101.7861.9500000NTU1.5700000
2/1/20101.6761.9000000NTU1.5500000
3/1/20101.5861.8800000NTU1.5600000
4/1/20101.7561.6700000NTU1.7100000
6/1/20103.7762.1100000NTU2.9600000
7/1/20108.5963.4700000NTU3.7900000
8/1/20102.0443.5500000NTU2.0200000
9/1/20105.68124.3700000NTU3.0000000
10/1/20105.5465.1200000NTU3.5400000
11/1/20102.2664.6500000NTU2.1000000
12/1/20101.0164.1900000NTU0.9300000
1/1/20112.4063.1600000NTU2.3700000
2/1/20111.6663.0900000NTU1.6000000
3/1/20111.8262.4500000NTU1.7700000
4/1/20111.7161.8100000NTU1.6000000
5/1/20111.5461.6900000NTU1.4300000
6/1/20112.2561.9000000NTU2.1800000
7/1/20115.0562.3400000NTU4.2400000
8/1/20111.6962.3400000NTU1.5800000
9/1/20111.3662.2700000NTU1.3200000
10/1/20111.6862.2600000NTU1.3300000
11/1/20112.8362.4800000NTU2.0200000
12/1/20111.2762.3100000NTU1.1000000
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 »

Water quality data are not available for the tidal portion of this creek.

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

Matheny 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 Matheny Creek Basin is covered by impervious surfaces.

Loading interactive chart...

Land Use / Land Cover

Matheny 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 »

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.