| Report Year: 2009 |
| Central Park Lake, Jones County |
| Summary Data Table |
| Parameter | 6/23/2009 | 7/28/2009 | 2009 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Lake Depth (m) | 4.9 | 4.7 | 4.8 | 5.0 | 4.7 | 4.7 | 4.9 | 4.9 | 4.7 | 4.9 | 4.5 |
| Thermocline Depth (m) | 3.4 | 2.0 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| Secchi Disk Depth (m) | 1.7 | 0.3 | 1.0 | 0.6 | 0.5 | 0.8 | 1.8 | 2.3 | 0.8 | 2.7 | 0.6 |
| Temperature(oC) | 25.4 | 23.9 | 24.7 | 25.4 | 24.6 | 27.9 | 24.4 | 26.0 | 26.5 | 25.3 | 24.8 |
| Dissolved Oxygen (mg/L) | 14.3 | 14.7 | 14.5 | 10.3 | 8.7 | 10.6 | 8.5 | 6.8 | 11.7 | 12.5 | 8.4 |
| Dissolved Oxygen Saturation (%) | 174 | 175 | 174.6 | 125.8 | 103.5 | 137.6 | 103.0 | 83.6 | 146.5 | 156.7 | 101.3 |
| Specific Conductivity (μS/cm) | 390.0 | 330.0 | 360.0 | 309.8 | 319.4 | 324.6 | 383.5 | 339.7 | 476.0 | 383.6 | 360.5 |
| Turbidity (NTU) | 6.4 | 33.1 | 19.7 | 26.5 | 532.4 | 19.3 | 12.5 | 10.7 | 21.9 | 6.7 | 35.8 |
| Chlorophyll a (μg/L) | 28.0 | 61.0 | 44.5 | 48.9 | 82.4 | 67.3 | 25.3 | 12.7 | 44.8 | 16.8 | 19.9 |
| Total Phosphorus as P (μg/L) | 50 | 103 | 76 | 90 | 101 | 100 | 79 | 75 | 101 | 49 | 158 |
| SRP as P (μg/L) | - | - | - | 1 | 2 | 4 | 3 | 6 | 1 | - | - |
| Total Nitrogen as N (mg/L) | 1.06 | 1.66 | 1.36 | 1.10 | 1.78 | 1.35 | 1.27 | 1.10 | 1.40 | 1.00 | 1.73 |
| (Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L) | 16 | 48 | 29 | 24 | 16 | 175 | 109 | - | - | - | - |
| (Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L) | 1.7 | 8.3 | 5.0 | 4.9 | 2.9 | 22.8 | 8.1 | - | - | - | - |
| Nitrate + Nitrite (NO3 + NO2) as N (mg/L) | 0.12 | 0.12 | 0.12 | 0.12 | 0.12 | 0.12 | 0.15 | 0.12 | 0.34 | 0.26 | 0.14 |
| TN:TP ratio | 21 | 16 | 19 | 13 | 19 | 13 | 15 | 15 | 14 | 21 | 12 |
| pH | 8.6 | 8.6 | 8.6 | 8.6 | 8.8 | 8.7 | 8.6 | 8.8 | 8.6 | 8.3 | 6.9 |
| Alkalinity as CaCO3 (mg/L) | 170 | 140 | 155 | 147 | 141 | 153 | 164 | 107 | 142 | 161 | 155 |
| Silica as Si (mg/L) | - | - | - | - | - | 5.61 | 2.72 | 3.75 | 5.48 | - | - |
| Dissolved Organic Carbon (mg/L) | 5.11 | 4.98 | 5.05 | 5.94 | 6.52 | 8.83 | 6.25 | 10.26 | 11.33 | - | - |
| Inorganic Suspended Solids (mg/L) | 4 | 7 | 5 | 3 | 6 | 4 | 3 | 4 | 8 | 4 | 3 |
| Volatile Suspended Solids (mg/L) | 7 | 16 | 12 | 11 | 14 | 8 | 4 | 6 | 9 | 2 | 5 |
| Total Suspended Solids (mg/L) | 11 | 23 | 17 | 13 | 20 | 12 | 7 | 9 | 17 | 5 | 9 |
| Carlson Trophic State Index (Secchi)* | 52 | 77 | 60 | 68 | 69 | 63 | 52 | 48 | 64 | 46 | 67 |
| Carlson Trophic State Index (Chl a)* | 63 | 71 | 68 | 69 | 74 | 72 | 62 | 56 | 68 | 58 | 60 |
| Carlson Trophic State Index (TP)* | 60 | 71 | 67 | 69 | 71 | 71 | 67 | 66 | 71 | 60 | 77 |
| *Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions. |