| Report Year: 2011 |
| Wilson Park Lake, Taylor County |
| Summary Data Table |
| Parameter | 6/14/2011 | 8/1/2011 | 9/12/2011 | 2011 | 2010 | 2009 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Lake Depth (m) | 5.2 | 4.9 | 4.8 | 5.0 | 5.2 | 5.3 | - | - | 5.9 | 6.1 | 5.7 | 5.5 | 6.0 | 5.8 |
| Thermocline Depth (m) | 3.8 | 2.3 | 1.8 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| Secchi Disk Depth (m) | 0.6 | 0.5 | 0.4 | 0.5 | 0.6 | 0.8 | - | - | 1.5 | 0.5 | 0.7 | 1.3 | 1.0 | 0.6 |
| Temperature(oC) | 20.5 | 30.1 | 23.9 | 24.8 | 24.6 | 24.1 | - | - | 24.8 | 21.8 | 23.4 | 26.5 | 23.2 | 25.6 |
| Dissolved Oxygen (mg/L) | 6.7 | 13.1 | 12.1 | 10.7 | 6.9 | 8.5 | - | - | 9.6 | 7.9 | 9.1 | 11.1 | 6.9 | 9.0 |
| Dissolved Oxygen Saturation (%) | 74 | 174 | 144 | 130.7 | 82.0 | 100.3 | - | - | 114.8 | 90.3 | 106.6 | 138.3 | 76.8 | 110.2 |
| Specific Conductivity (μS/cm) | 210.0 | 210.0 | 210.0 | 210.0 | 210.0 | 190.0 | - | - | 254.5 | 236.7 | 236.3 | 282.3 | 192.1 | 209.2 |
| Turbidity (NTU) | 34.9 | 29.4 | 54.5 | 39.6 | 19.1 | 15.5 | - | - | 10.2 | 26.5 | 23.9 | 8.7 | 20.5 | 18.0 |
| Chlorophyll a (μg/L) | 59.8 | 44.0 | 70.8 | 58.2 | 37.2 | 51.0 | - | - | 71.2 | 32.3 | 30.7 | 27.5 | 39.5 | 14.5 |
| Total Phosphorus as P (μg/L) | 70.6 | 83.8 | 133.4 | 95.9 | 121.2 | 82.3 | - | - | 57 | 135 | 87 | 65 | 135 | - |
| SRP as P (μg/L) | <11 | <11 | <11 | <11 | <8 | <9 | - | - | <1 | 31.4 | 1.5 | 1.5 | - | - |
| TKN (mg/L) | 2.0 | 1.7 | 1.5 | 2 | <0.5 | - | - | - | - | - | - | - | - | - |
| Total Dissolved Solids (g/L) | 0.1 | 0.1 | 0.1 | 0.1 | - | - | - | - | - | - | - | - | - | - |
| Total Nitrogen as N (mg/L) | - | - | - | - | - | 1.2 | - | - | 1.39 | 1.87 | 1.53 | 1.18 | 2.30 | 2.00 |
| (Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L) | <145 | <145 | <145 | <145 | <136 | <130 | - | - | 29 | 105 | - | - | - | - |
| (Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L) | <PQL | <PQL | <PQL | <PQL | <PQL | <130 | - | - | 3 | 5 | - | - | - | - |
| Nitrate + Nitrite (NO3 + NO2) as N (mg/L) | <0.4 | <0.4 | <0.4 | <0.4 | <0.5 | - | - | - | 0.60 | 0.26 | 0.12 | 0.12 | 0.94 | 0.14 |
| TN:TP ratio | - | - | - | - | - | 15 | - | - | 27 | 14 | 18 | 19 | 18 | - |
| pH | 8.4 | 8.9 | 9.1 | 8.8 | 8.4 | 9.4 | - | - | 8.3 | 8.2 | 8.6 | 8.9 | 8.5 | 7.2 |
| Alkalinity as CaCO3 (mg/L) | 95 | 86 | 74 | 85 | 93 | 86 | - | - | 115 | 105 | 69 | 115 | 81 | 103 |
| Silica as Si (mg/L) | - | - | - | - | - | - | - | - | 4.07 | 5.84 | 3.52 | 2.14 | - | - |
| Dissolved Organic Carbon (mg/L) | <7.6 | 9.24 | 9.04 | 9 | 8 | 8 | - | - | 6.45 | 9.49 | 14.07 | 10.44 | - | - |
| Inorganic Suspended Solids (mg/L) | <5 | <5 | 7 | <5 | <4 | 5 | - | - | 4 | 8 | 7 | 3 | 6 | 5 |
| Volatile Suspended Solids (mg/L) | 14 | 11 | 18 | 14 | 12 | 10 | - | - | 7 | 9 | 7 | 7 | 27 | 10 |
| Total Suspended Solids (mg/L) | 17 | 12 | 25 | 18 | 14 | 15 | - | - | 11 | 17 | 15 | 8 | 33 | 15 |
| Carlson Trophic State Index (Secchi)* | 69 | 70 | 73 | 70 | 68 | 63 | - | - | 54 | 71 | 65 | 57 | 60 | 67 |
| Carlson Trophic State Index (Chl a)* | 71 | 68 | 72 | 70 | 66 | 69 | - | - | 72 | 65 | 64 | 63 | 67 | 57 |
| Carlson Trophic State Index (TP)* | 66 | 68 | 75 | 70 | 73 | 68 | - | - | 62 | 75 | 69 | 64 | 75 | - |
| *Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions. |