| Report Year: 2011 |
| Moorehead Park Pond, Ida County |
| Summary Data Table |
| Parameter | 5/16/2011 | 6/27/2011 | 8/15/2011 | 2011 | 2010 | 2009 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Lake Depth (m) | 6.2 | 5.6 | 5.9 | 5.9 | 6.1 | 6.0 | 6.0 | 5.8 | 6.1 | 5.9 | 6.1 | 6.1 | 6.3 | 6.0 |
| Thermocline Depth (m) | 4.8 | 2.3 | 3.3 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| Secchi Disk Depth (m) | 1.2 | 1.8 | 1.3 | 1.4 | 3.4 | 3.0 | 0.9 | 2.6 | 1.6 | 1.8 | 2.4 | 2.4 | 2.9 | 1.8 |
| Temperature(oC) | 15.5 | 22.4 | 25.3 | 21.1 | 24.1 | 22.5 | 24.0 | 23.5 | 23.4 | 22.6 | 22.5 | 23.5 | 22.1 | 25.1 |
| Dissolved Oxygen (mg/L) | 11.9 | 10.6 | 8.5 | 10.3 | 13.8 | 9.0 | 10.3 | 10.7 | 9.2 | 10.3 | 11.6 | 8.7 | 11.5 | 7.6 |
| Dissolved Oxygen Saturation (%) | 119 | 123 | 103 | 114.9 | 164.2 | 103.3 | 121.7 | 125.0 | 107.1 | 119.5 | 134.2 | 102.9 | 130.6 | 91.7 |
| Specific Conductivity (μS/cm) | 470.0 | 510.0 | 430.0 | 470.0 | 410.0 | 416.7 | 332.6 | 365.1 | 490.1 | 372.7 | 410.3 | 485.7 | 481.1 | 433.4 |
| Turbidity (NTU) | 7.0 | 3.5 | 3.8 | 4.8 | 1.7 | 6.3 | 9.4 | 6.1 | 9.8 | 6.4 | 2.7 | 83.5 | 20.7 | 7.7 |
| Chlorophyll a (μg/L) | 7.1 | 11.1 | 8.9 | 9.0 | 9.9 | <5 | 31.7 | 16.0 | 49.3 | 11.8 | 6.2 | 8.3 | 1.1 | 7.2 |
| Total Phosphorus as P (μg/L) | 43.1 | 27.6 | 44.9 | 38.5 | 30.1 | 28.9 | 68 | 33 | 40 | 32 | 32 | 39 | 55 | - |
| SRP as P (μg/L) | <11 | <11 | <11 | <11 | <8 | <9 | <1 | <1 | <1 | <1 | 1.7 | <1 | - | - |
| TKN (mg/L) | 0.5 | 0.5 | 1.1 | 1 | <0.5 | - | - | - | - | - | - | - | - | - |
| Total Dissolved Solids (g/L) | 0.3 | 0.3 | 0.3 | 0.3 | - | - | - | - | - | - | - | - | - | - |
| Total Nitrogen as N (mg/L) | - | - | - | - | - | <0.75 | 0.63 | 0.81 | 0.68 | 0.65 | 0.62 | 0.86 | 0.87 | 0.92 |
| (Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L) | <145 | <145 | <145 | <145 | <136 | <130 | <26 | <26 | <26 | <26 | - | - | - | - |
| (Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L) | <PQL | <PQL | <PQL | <PQL | <PQL | <130 | 2 | 5 | 1 | 0 | - | - | - | - |
| Nitrate + Nitrite (NO3 + NO2) as N (mg/L) | <0.4 | <0.4 | <0.4 | <0.4 | <0.5 | - | 0.12 | 0.12 | 0.12 | 0.12 | 0.12 | 0.16 | 0.12 | 0.14 |
| TN:TP ratio | - | - | - | - | - | 17 | 12 | 28 | 16 | 20 | 20 | 25 | 17 | - |
| pH | 8.2 | 8.3 | 8.3 | 8.3 | 8.7 | 8.6 | 9.0 | 9.0 | 8.5 | 8.8 | 8.7 | 8.6 | 8.3 | 8.1 |
| Alkalinity as CaCO3 (mg/L) | 242 | 204 | 220 | 222 | 199 | 217 | 161 | 190 | 205 | 176 | 166 | 193 | 162 | 222 |
| Silica as Si (mg/L) | - | - | - | - | - | - | - | - | 2.58 | 1.30 | 1.18 | 1.99 | - | - |
| Dissolved Organic Carbon (mg/L) | <7.6 | <7.6 | <7.6 | <7.6 | <6.4 | <6.2 | 6.07 | 4.12 | 5.06 | 5.47 | 8.06 | 8.83 | - | - |
| Inorganic Suspended Solids (mg/L) | 8 | <5 | <5 | <5 | <4 | <4 | 3 | 2 | 5 | 2 | 2 | 5 | 2 | 3 |
| Volatile Suspended Solids (mg/L) | <8 | <8 | <8 | <8 | <9 | <8 | 10 | 4 | 3 | 2 | 4 | 2 | 3 | 2 |
| Total Suspended Solids (mg/L) | 10 | <6 | 8 | 8 | <5 | <5 | 13 | 6 | 8 | 3 | 7 | 7 | 5 | 4 |
| Carlson Trophic State Index (Secchi)* | 58 | 52 | 56 | 55 | 42 | 44 | 61 | 46 | 53 | 51 | 47 | 47 | 45 | 52 |
| Carlson Trophic State Index (Chl a)* | 50 | 54 | 52 | 52 | 53 | 37 | 65 | 58 | 69 | 55 | 49 | 51 | 32 | 50 |
| Carlson Trophic State Index (TP)* | 58 | 52 | 59 | 57 | 53 | 53 | 65 | 55 | 57 | 54 | 54 | 57 | 62 | - |
| *Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions. |