| Report Year: 2009 |
| Lower Pine Lake, Hardin County |
| Summary Data Table |
| Parameter | 6/25/2009 | 7/30/2009 | 2009 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Lake Depth (m) | 4.6 | 5.0 | 4.8 | 4.7 | 4.9 | 4.2 | 4.7 | 4.0 | 4.0 | 4.2 | 4.6 |
| Thermocline Depth (m) | 1.0 | 2.3 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| Secchi Disk Depth (m) | 1.1 | 0.6 | 0.9 | 0.7 | 0.5 | 0.7 | 0.6 | 1.2 | 0.5 | 1.0 | 0.5 |
| Temperature(oC) | 25.6 | 24.1 | 24.9 | 25.5 | 24.4 | 26.4 | 23.5 | 23.8 | 24.8 | 24.0 | 24.4 |
| Dissolved Oxygen (mg/L) | 13.8 | 7.9 | 10.8 | 11.5 | 9.0 | 9.9 | 12.9 | 14.3 | 10.7 | 7.0 | 6.0 |
| Dissolved Oxygen Saturation (%) | 169 | 94 | 131.2 | 139.5 | 110.6 | 121.7 | 151.8 | 170.1 | 129.7 | 88.7 | 71.4 |
| Specific Conductivity (μS/cm) | 430.0 | 430.0 | 430.0 | 352.2 | 352.3 | 366.7 | 453.1 | 378.1 | 363.8 | 332.6 | 265.8 |
| Turbidity (NTU) | 3.3 | 6.7 | 5.0 | 11.5 | 7.3 | 20.0 | 44.3 | 13.4 | 35.1 | 16.4 | 34.4 |
| Chlorophyll a (μg/L) | 30.0 | 21.0 | 25.5 | 44.5 | 70.5 | 143.5 | 97.9 | 25.8 | 112.6 | 32.0 | 12.6 |
| Total Phosphorus as P (μg/L) | 53 | 128 | 91 | 95 | 176 | 113 | 120 | 86 | 172 | 104 | 239 |
| SRP as P (μg/L) | - | - | - | 1 | 5 | - | 1 | 1 | 4 | - | - |
| Total Nitrogen as N (mg/L) | 6.94 | 4.15 | 5.55 | 6.39 | 2.50 | 5.24 | 6.54 | 6.80 | 2.30 | 7.80 | 4.68 |
| (Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L) | 28 | 45 | 37 | 180 | 69 | 255 | 157 | - | - | - | - |
| (Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L) | 5.3 | 7.9 | 6.6 | 20.0 | 9.0 | 23.7 | 26.2 | - | - | - | - |
| Nitrate + Nitrite (NO3 + NO2) as N (mg/L) | 6.46 | 2.73 | 4.60 | 5.15 | 1.02 | 3.58 | 5.19 | 5.34 | 0.73 | 6.68 | 2.95 |
| TN:TP ratio | 131 | 32 | 82 | 66 | 18 | 50 | 63 | 82 | 20 | 85 | 25 |
| pH | 8.6 | 8.6 | 8.6 | 8.3 | 8.3 | 8.2 | 8.7 | 8.6 | 9.0 | 8.4 | 7.2 |
| Alkalinity as CaCO3 (mg/L) | 166 | 144 | 155 | 137 | 145 | 133 | 131 | 94 | 128 | 132 | 129 |
| Silica as Si (mg/L) | - | - | - | - | - | 4.93 | 5.65 | 2.54 | 5.17 | - | - |
| Dissolved Organic Carbon (mg/L) | 2.58 | 3.50 | <3.6 | 13.22 | 4.19 | 4.50 | <3.6 | 6.80 | 7.03 | - | - |
| Inorganic Suspended Solids (mg/L) | 8 | 3 | 5 | 4 | 6 | 6 | 4 | 8 | 5 | 5 | 16 |
| Volatile Suspended Solids (mg/L) | - | 6 | 6 | 9 | 11 | 11 | 14 | 8 | 16 | 6 | 7 |
| Total Suspended Solids (mg/L) | 7 | 9 | 8 | 13 | 18 | 16 | 17 | 16 | 21 | 12 | 22 |
| Carlson Trophic State Index (Secchi)* | 59 | 67 | 62 | 65 | 69 | 66 | 68 | 58 | 72 | 60 | 70 |
| Carlson Trophic State Index (Chl a)* | 64 | 60 | 62 | 68 | 72 | 79 | 76 | 62 | 77 | 65 | 55 |
| Carlson Trophic State Index (TP)* | 61 | 74 | 69 | 70 | 79 | 72 | 73 | 68 | 78 | 71 | 83 |
| *Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions. |