| Report Year: 2009 |
| Kent Park Lake, Johnson County |
| Summary Data Table |
| Parameter | 7/27/2009 | 6/22/2009 | 2009 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Lake Depth (m) | 5.2 | 4.2 | 4.7 | 5.0 | 5.0 | 4.7 | 5.1 | 5.2 | 5.1 | 5.3 | 5.7 |
| Thermocline Depth (m) | 1.6 | 1.8 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| Secchi Disk Depth (m) | 0.6 | 0.5 | 0.6 | 1.0 | 0.8 | 0.8 | 0.8 | 1.2 | 1.2 | 1.5 | 0.9 |
| Temperature(oC) | 25.0 | 25.7 | 25.3 | 26.4 | 26.1 | 27.1 | 24.7 | 25.5 | 26.5 | 27.1 | 25.4 |
| Dissolved Oxygen (mg/L) | 11.7 | 12.9 | 12.3 | 8.9 | 11.0 | 10.3 | 8.9 | 7.8 | 7.2 | 13.3 | 2.7 |
| Dissolved Oxygen Saturation (%) | 141 | 158 | 149.8 | 110.0 | 134.9 | 129.6 | 107.9 | 94.1 | 89.5 | 165.6 | 33.0 |
| Specific Conductivity (μS/cm) | 310.0 | 310.0 | 310.0 | 293.9 | 304.6 | 323.4 | 306.7 | 331.0 | 504.2 | 327.6 | 330.1 |
| Turbidity (NTU) | 21.7 | 21.7 | 21.7 | 12.5 | 7.1 | 172.5 | 21.1 | 15.2 | 9.0 | 9.9 | 9.3 |
| Chlorophyll a (μg/L) | 8.0 | 52.0 | 30.0 | 22.1 | 36.5 | 95.5 | 39.5 | 23.9 | 14.7 | 12.4 | 3.0 |
| Total Phosphorus as P (μg/L) | 101 | 65 | 83 | 59 | 63 | 82 | 99 | 64 | 57 | 39 | 145 |
| SRP as P (μg/L) | - | - | - | 1 | 1 | 2 | 8 | 2 | 2 | - | - |
| Total Nitrogen as N (mg/L) | 1.35 | 1.02 | 1.19 | 0.80 | 1.10 | 1.13 | 1.57 | 0.95 | 0.77 | 1.08 | 1.08 |
| (Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L) | - | - | - | 16 | 16 | 233 | 281 | - | - | - | - |
| (Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L) | - | - | - | 1.6 | 0.8 | 27.6 | 18.7 | - | - | - | - |
| Nitrate + Nitrite (NO3 + NO2) as N (mg/L) | 0.12 | 0.12 | 0.12 | 0.12 | 0.12 | 0.12 | 0.14 | 0.12 | 0.13 | 0.23 | 0.12 |
| TN:TP ratio | 13 | 16 | 15 | 14 | 18 | 15 | 18 | 16 | 13 | 28 | 9 |
| pH | 8.9 | 8.5 | 8.7 | 8.4 | 8.7 | 8.7 | 7.6 | 8.5 | 8.4 | 8.5 | 7.2 |
| Alkalinity as CaCO3 (mg/L) | 139 | 148 | 144 | 151 | 146 | 153 | 99 | 109 | 152 | 146 | 152 |
| Silica as Si (mg/L) | - | - | - | - | - | 4.95 | 4.08 | 3.10 | 2.91 | - | - |
| Dissolved Organic Carbon (mg/L) | 5.02 | 4.44 | 4.73 | 5.07 | 5.63 | 6.02 | 5.63 | 7.88 | 8.22 | - | - |
| Inorganic Suspended Solids (mg/L) | 3 | 7 | 5 | 5 | 5 | 4 | 6 | 3 | 4 | 2 | 5 |
| Volatile Suspended Solids (mg/L) | 15 | 10 | 12 | 7 | 8 | 10 | 8 | 7 | 4 | 3 | 3 |
| Total Suspended Solids (mg/L) | 17 | 17 | 17 | 12 | 13 | 15 | 14 | 10 | 8 | 5 | 8 |
| Carlson Trophic State Index (Secchi)* | 67 | 70 | 69 | 60 | 63 | 64 | 63 | 57 | 58 | 54 | 62 |
| Carlson Trophic State Index (Chl a)* | 51 | 69 | 64 | 61 | 66 | 75 | 67 | 62 | 57 | 55 | 41 |
| Carlson Trophic State Index (TP)* | 71 | 64 | 68 | 63 | 64 | 68 | 70 | 64 | 62 | 57 | 76 |
| *Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions. |