| Report Year: 2011 |
| Badger Creek Lake, Madison County |
| Summary Data Table |
| Parameter | 5/23/2011 | 7/11/2011 | 8/22/2011 | 2011 | 2010 | 2009 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Lake Depth (m) | 5.3 | 5.1 | 5.8 | 5.4 | 5.9 | 5.6 | - | - | 6.0 | 6.1 | 6.1 | 6.5 | 5.4 | 6.1 |
| Thermocline Depth (m) | 4.4 | 3.1 | Nil | 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) | 0.7 | 0.6 | 0.3 | 0.5 | 0.5 | 0.7 | - | - | 0.7 | 0.2 | 0.7 | 0.6 | 1.2 | 0.5 |
| Temperature(oC) | 19.8 | 28.0 | 25.8 | 24.5 | 24.7 | 23.9 | - | - | 26.1 | 24.0 | 23.9 | 25.6 | 23.7 | 23.9 |
| Dissolved Oxygen (mg/L) | 9.3 | 12.2 | 3.5 | 8.3 | 11.5 | 6.7 | - | - | 10.6 | 12.4 | 9.1 | 7.0 | 13.0 | 4.8 |
| Dissolved Oxygen Saturation (%) | 102 | 155 | 43 | 99.8 | 139.0 | 78.9 | - | - | 131.6 | 148.6 | 110.3 | 86.3 | 152.6 | 57.5 |
| Specific Conductivity (μS/cm) | 290.0 | 290.0 | 280.0 | 286.7 | 356.7 | 283.3 | - | - | 269.5 | 242.7 | 284.4 | 325.6 | 248.6 | 286.0 |
| Turbidity (NTU) | 4.3 | 13.2 | 21.6 | 13.0 | 8.4 | 46.4 | - | - | 36.4 | 90.0 | 54.5 | 31.7 | 33.4 | 26.2 |
| Chlorophyll a (μg/L) | 40.0 | 118.0 | 54.2 | 70.7 | 53.8 | 35.3 | - | - | 159.3 | 80.2 | 23.0 | 62.3 | 67.2 | 34.5 |
| Total Phosphorus as P (μg/L) | 140.6 | 85.7 | 194.0 | 140.1 | 110.8 | 140.3 | - | - | 263 | 282 | 355 | 294 | 204 | - |
| SRP as P (μg/L) | <11 | <11 | 20.8 | 20.8 | 19.2 | 26.7 | - | - | 277.9 | 181.8 | 336.5 | 250.8 | - | - |
| TKN (mg/L) | 0.5 | 2.0 | 1.6 | 1 | <0.5 | - | - | - | - | - | - | - | - | - |
| Total Dissolved Solids (g/L) | 0.2 | 0.2 | 0.2 | 0.2 | - | - | - | - | - | - | - | - | - | - |
| Total Nitrogen as N (mg/L) | - | - | - | - | - | 2.0 | - | - | 2.03 | 2.88 | 2.48 | 1.50 | 1.68 | 1.80 |
| (Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L) | 219.44 | <145 | <145 | <145 | <136 | <130 | - | - | 59 | 186 | - | - | - | - |
| (Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L) | 20 | <PQL | <PQL | <PQL | <PQL | <130 | - | - | 15 | 15 | - | - | - | - |
| Nitrate + Nitrite (NO3 + NO2) as N (mg/L) | 2.37 | 3.18 | <0.4 | 2 | 1 | - | - | - | 0.72 | 1.21 | 0.70 | 0.16 | 0.21 | 0.20 |
| TN:TP ratio | - | - | - | - | - | 14 | - | - | 17 | 11 | 12 | 6 | 15 | - |
| pH | 8.4 | 8.7 | 8.2 | 8.4 | 8.6 | 8.6 | - | - | 9.1 | 9.2 | 9.0 | 8.5 | 8.4 | 7.4 |
| Alkalinity as CaCO3 (mg/L) | 129 | 129 | 120 | 126 | 125 | 127 | - | - | 121 | 96 | 86 | 131 | 108 | 149 |
| Silica as Si (mg/L) | - | - | - | - | - | - | - | - | 5.98 | 10.57 | 5.65 | 5.77 | - | - |
| Dissolved Organic Carbon (mg/L) | <7.6 | <7.6 | <7.6 | <7.6 | <6.4 | <6.2 | - | - | 6.97 | 6.64 | 12.02 | 11.15 | - | - |
| Inorganic Suspended Solids (mg/L) | <5 | 12 | 18 | 10 | 6 | 28 | - | - | 8 | 23 | 8 | 10 | 9 | 5 |
| Volatile Suspended Solids (mg/L) | 11 | 9 | <8 | <8 | <9 | <8 | - | - | 22 | 28 | 21 | 10 | 9 | 5 |
| Total Suspended Solids (mg/L) | 12 | 20 | 21 | 18 | 14 | 35 | - | - | 30 | 51 | 28 | 19 | 19 | 11 |
| Carlson Trophic State Index (Secchi)* | 66 | 69 | 76 | 70 | 70 | 65 | - | - | 66 | 86 | 64 | 67 | 58 | 71 |
| Carlson Trophic State Index (Chl a)* | 67 | 77 | 70 | 72 | 70 | 66 | - | - | 80 | 74 | 61 | 71 | 72 | 65 |
| Carlson Trophic State Index (TP)* | 75 | 68 | 80 | 75 | 72 | 75 | - | - | 84 | 85 | 89 | 86 | 81 | - |
| *Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions. |