| Report Year: 2009 |
| Lake Orient, Adair County |
| Summary Data Table |
| Parameter | 6/8/2009 | 7/13/2009 | 2009 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Lake Depth (m) | 3.1 | 2.9 | 3.0 | 3.0 | 3.0 | 3.0 | 3.1 | 3.2 | 3.1 | 3.2 | 3.0 |
| Thermocline Depth (m) | Nil | Nil | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| Secchi Disk Depth (m) | 0.5 | 0.4 | 0.5 | 0.5 | 0.5 | 0.5 | 0.6 | 0.5 | 0.5 | 0.6 | 0.6 |
| Temperature(oC) | 21.0 | 22.8 | 21.9 | 24.4 | 25.2 | 23.5 | 21.9 | 23.6 | 24.1 | 23.5 | 25.1 |
| Dissolved Oxygen (mg/L) | 9.7 | 12.5 | 11.1 | 10.1 | 10.7 | 8.4 | 9.3 | 8.6 | 8.9 | 7.8 | 8.5 |
| Dissolved Oxygen Saturation (%) | 109 | 145 | 126.9 | 119.4 | 130.5 | 97.0 | 106.8 | 101.9 | 106.8 | 87.0 | 102.8 |
| Specific Conductivity (μS/cm) | 270.0 | 220.0 | 245.0 | 305.1 | 271.0 | 336.4 | 333.7 | 376.7 | 366.3 | 334.2 | 376.5 |
| Turbidity (NTU) | 46.7 | 34.1 | 40.4 | 19.0 | 32.8 | 21.0 | 267.2 | 30.6 | 26.1 | 45.9 | 25.0 |
| Chlorophyll a (μg/L) | 117.0 | 22.0 | 69.5 | 38.4 | 110.4 | 49.1 | 21.8 | 18.6 | 58.4 | 19.1 | 22.1 |
| Total Phosphorus as P (μg/L) | 228 | 215 | 221 | 139 | 417 | 215 | 143 | 156 | 276 | 152 | 322 |
| SRP as P (μg/L) | 4 | 118 | 61 | 7 | 19 | 160 | 68 | 75 | 52 | - | - |
| Total Nitrogen as N (mg/L) | 3.78 | 4.21 | 4.00 | 7.82 | 2.66 | 4.05 | 4.32 | 2.50 | 2.60 | 4.95 | 1.49 |
| (Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L) | 48 | 85 | 67 | 196 | 16 | 47 | 47 | - | - | - | - |
| (Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L) | 14.3 | 23.6 | 19.0 | 39.6 | 1.1 | 4.2 | 2.4 | - | - | - | - |
| Nitrate + Nitrite (NO3 + NO2) as N (mg/L) | 3.62 | 3.11 | 3.37 | 6.07 | 0.84 | 3.28 | 3.65 | 1.89 | 1.60 | 3.88 | 0.31 |
| TN:TP ratio | 17 | 20 | 18 | 56 | 14 | 26 | 31 | 25 | 13 | 31 | 5 |
| pH | 9.0 | 8.9 | 8.9 | 8.7 | 9.6 | 8.4 | 8.3 | 8.3 | 8.7 | 8.0 | 8.0 |
| Alkalinity as CaCO3 (mg/L) | 89 | 85 | 87 | 95 | 108 | 116 | 111 | 99 | 128 | 106 | 161 |
| Silica as Si (mg/L) | - | - | - | - | - | 5.77 | 5.23 | 4.04 | 2.69 | - | - |
| Dissolved Organic Carbon (mg/L) | 6.14 | 4.08 | 5.11 | 4.63 | 5.15 | 4.59 | <3.6 | 7.68 | 7.69 | - | - |
| Inorganic Suspended Solids (mg/L) | 15 | 24 | 19 | 11 | 13 | 23 | 19 | 18 | 6 | 26 | 27 |
| Volatile Suspended Solids (mg/L) | 19 | 10 | 15 | 10 | 11 | 9 | 8 | 7 | 11 | 7 | 8 |
| Total Suspended Solids (mg/L) | 34 | 34 | 34 | 21 | 24 | 31 | 26 | 24 | 18 | 33 | 35 |
| Carlson Trophic State Index (Secchi)* | 70 | 73 | 72 | 69 | 70 | 69 | 68 | 70 | 70 | 68 | 67 |
| Carlson Trophic State Index (Chl a)* | 77 | 61 | 72 | 66 | 77 | 69 | 61 | 59 | 70 | 60 | 61 |
| Carlson Trophic State Index (TP)* | 82 | 82 | 82 | 75 | 91 | 82 | 76 | 77 | 85 | 77 | 87 |
| *Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions. |