| Report Year: 2009 |
| Fogle Lake, Ringgold County |
| Summary Data Table |
| Parameter | 6/9/2009 | 7/14/2009 | 2009 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Lake Depth (m) | 7.4 | 7.0 | 7.2 | - | - | 8.0 | 7.0 | 7.6 | 7.2 | 7.6 | 7.3 |
| Thermocline Depth (m) | 4.2 | 2.5 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| Secchi Disk Depth (m) | 1.0 | 2.6 | 1.8 | - | - | 1.2 | 1.0 | 1.3 | 1.2 | 1.7 | 0.8 |
| Temperature(oC) | 21.2 | 25.0 | 23.1 | - | - | 24.5 | 22.0 | 23.9 | 26.2 | 23.9 | 25.3 |
| Dissolved Oxygen (mg/L) | 7.8 | 6.9 | 7.4 | - | - | 7.5 | 6.8 | 8.9 | 10.3 | 6.5 | 9.2 |
| Dissolved Oxygen Saturation (%) | 88 | 84 | 85.7 | - | - | 89.6 | 77.7 | 103.0 | 126.3 | 76.9 | 111.8 |
| Specific Conductivity (μS/cm) | 220.0 | 230.0 | 225.0 | - | - | 264.9 | 257.4 | 270.4 | 251.1 | 249.2 | 275.6 |
| Turbidity (NTU) | 132.5 | 1.7 | 67.1 | - | - | 7.2 | 18.5 | 12.5 | 6.9 | 16.2 | 13.7 |
| Chlorophyll a (μg/L) | 21.0 | 4.0 | 12.5 | - | - | 50.3 | 22.5 | 27.4 | 24.1 | 26.0 | 9.0 |
| Total Phosphorus as P (μg/L) | 53 | 34 | 44 | - | - | 48 | 58 | 52 | 50 | 48 | 100 |
| SRP as P (μg/L) | - | 2 | 2 | - | - | 1 | 2 | 1 | 1 | - | - |
| Total Nitrogen as N (mg/L) | 0.89 | 1.08 | 0.99 | - | - | 0.93 | 1.52 | 1.23 | 0.85 | 1.36 | 1.46 |
| (Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L) | 84 | 204 | 144 | - | - | 19 | 191 | - | - | - | - |
| (Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L) | 6.7 | 31.1 | 18.9 | - | - | 0.9 | 7.2 | - | - | - | - |
| Nitrate + Nitrite (NO3 + NO2) as N (mg/L) | 0.86 | 0.18 | 0.52 | - | - | 0.40 | 0.22 | 0.12 | 0.13 | 0.29 | 0.38 |
| TN:TP ratio | 17 | 32 | 24 | - | - | 21 | 26 | 25 | 17 | 40 | 15 |
| pH | 8.3 | 8.5 | 8.4 | - | - | 8.0 | 8.0 | 8.1 | 8.3 | 8.2 | 7.4 |
| Alkalinity as CaCO3 (mg/L) | 110 | 110 | 110 | - | - | 122 | 120 | 93 | 121 | 119 | 126 |
| Silica as Si (mg/L) | - | - | - | - | - | 2.18 | 3.77 | 1.83 | 1.79 | - | - |
| Dissolved Organic Carbon (mg/L) | 7.14 | 8.34 | 7.74 | - | - | 7.46 | 6.35 | 14.45 | 11.87 | - | - |
| Inorganic Suspended Solids (mg/L) | - | 7 | 7 | - | - | 1 | 5 | 4 | 6 | 5 | 3 |
| Volatile Suspended Solids (mg/L) | 9 | 2 | 6 | - | - | 4 | 5 | 4 | 6 | 5 | 5 |
| Total Suspended Solids (mg/L) | 8 | 10 | 9 | - | - | 4 | 10 | 8 | 10 | 8 | 8 |
| Carlson Trophic State Index (Secchi)* | 60 | 46 | 52 | - | - | 57 | 60 | 56 | 58 | 53 | 63 |
| Carlson Trophic State Index (Chl a)* | 60 | 44 | 55 | - | - | 69 | 61 | 63 | 62 | 63 | 52 |
| Carlson Trophic State Index (TP)* | 61 | 55 | 59 | - | - | 60 | 63 | 61 | 61 | 60 | 71 |
| *Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions. |