| Report Year: 2009 |
| Manteno Park Pond, Shelby County |
| Summary Data Table |
| Parameter | 7/14/2009 | 6/10/2009 | 2009 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Lake Depth (m) | 2.6 | 2.5 | 2.6 | - | - | 2.7 | 2.6 | 2.6 | 2.5 | 2.9 | 2.7 |
| Thermocline Depth (m) | 0.5 | Nil | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| Secchi Disk Depth (m) | 0.7 | 2.1 | 1.4 | - | - | 1.4 | 1.2 | 1.0 | 1.9 | 1.7 | 1.5 |
| Temperature(oC) | 24.6 | 19.6 | 22.1 | - | - | 23.7 | 22.7 | 24.0 | 25.7 | 22.3 | 25.3 |
| Dissolved Oxygen (mg/L) | 13.0 | 8.9 | 11.0 | - | - | 7.6 | 9.9 | 10.9 | 8.4 | 7.8 | 7.3 |
| Dissolved Oxygen Saturation (%) | 156 | 97 | 126.7 | - | - | 88.8 | 114.3 | 129.6 | 102.5 | 86.1 | 88.7 |
| Specific Conductivity (μS/cm) | 400.0 | 440.0 | 420.0 | - | - | 408.2 | 386.5 | 377.2 | 439.1 | 392.1 | 360.8 |
| Turbidity (NTU) | 14.0 | 5.4 | 9.7 | - | - | 15.2 | 53.0 | 13.5 | 4.0 | 6.4 | 4.4 |
| Chlorophyll a (μg/L) | 54.0 | 10.0 | 32.0 | - | - | 82.5 | 45.5 | 17.1 | 14.0 | 16.4 | 10.7 |
| Total Phosphorus as P (μg/L) | 137 | 66 | 101 | - | - | 110 | 85 | 92 | 55 | 126 | 115 |
| SRP as P (μg/L) | 8 | 1 | 4 | - | - | 14 | 6 | 4 | 4 | - | - |
| Total Nitrogen as N (mg/L) | 1.47 | 0.28 | 0.83 | - | - | 1.09 | 1.07 | 0.97 | 0.83 | 1.26 | 1.32 |
| (Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L) | 16 | 78 | 41 | - | - | 21 | 16 | - | - | - | - |
| (Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L) | 0.3 | 4.5 | 2.4 | - | - | 0.9 | 2.2 | - | - | - | - |
| Nitrate + Nitrite (NO3 + NO2) as N (mg/L) | 0.12 | 0.14 | 0.13 | - | - | 0.14 | 0.19 | 0.12 | 0.12 | 0.23 | 0.39 |
| TN:TP ratio | 11 | 3 | 7 | - | - | 12 | 13 | 11 | 16 | 10 | 12 |
| pH | 8.2 | 8.2 | 8.2 | - | - | 8.0 | 8.7 | 8.5 | 8.5 | 8.3 | 8.2 |
| Alkalinity as CaCO3 (mg/L) | 191 | 200 | 196 | - | - | 188 | 162 | 124 | 183 | 187 | 165 |
| Silica as Si (mg/L) | - | - | - | - | - | 3.02 | 3.26 | 1.58 | 2.82 | - | - |
| Dissolved Organic Carbon (mg/L) | 5.37 | 5.93 | 5.65 | - | - | 3.85 | 5.80 | 9.55 | 10.33 | - | - |
| Inorganic Suspended Solids (mg/L) | 16 | 3 | 10 | - | - | 6 | 4 | 6 | 1 | 3 | 2 |
| Volatile Suspended Solids (mg/L) | 10 | 3 | 6 | - | - | 7 | 7 | 4 | 4 | 4 | 2 |
| Total Suspended Solids (mg/L) | 26 | 6 | 16 | - | - | 10 | 12 | 10 | 5 | 7 | 4 |
| Carlson Trophic State Index (Secchi)* | 65 | 50 | 55 | - | - | 55 | 57 | 60 | 51 | 53 | 54 |
| Carlson Trophic State Index (Chl a)* | 70 | 53 | 65 | - | - | 74 | 68 | 58 | 56 | 58 | 54 |
| Carlson Trophic State Index (TP)* | 75 | 65 | 71 | - | - | 72 | 68 | 69 | 62 | 74 | 73 |
| *Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions. |