| Report Year: 2009 |
| Lake of Three Fires, Taylor County |
| Summary Data Table |
| Parameter | 6/9/2009 | 7/14/2009 | 2009 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Lake Depth (m) | 6.8 | 6.6 | 6.7 | - | - | 6.6 | 7.8 | 3.6 | 3.9 | 3.8 | 4.0 |
| Thermocline Depth (m) | 2.5 | 2.8 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| Secchi Disk Depth (m) | 0.9 | 0.5 | 0.7 | - | - | 1.9 | 0.4 | 0.6 | 0.6 | 0.6 | 0.8 |
| Temperature(oC) | 21.6 | 24.8 | 23.2 | - | - | 24.8 | 22.8 | 24.3 | 27.4 | 24.2 | 26.1 |
| Dissolved Oxygen (mg/L) | 10.3 | 9.8 | 10.0 | - | - | 9.4 | 2.2 | 8.3 | 14.0 | 8.3 | 8.7 |
| Dissolved Oxygen Saturation (%) | 117 | 118 | 117.4 | - | - | 113.1 | 25.5 | 98.9 | 176.1 | 101.2 | 107.2 |
| Specific Conductivity (μS/cm) | 220.0 | 190.0 | 205.0 | - | - | 267.2 | 230.4 | 287.5 | 236.7 | 195.8 | 214.9 |
| Turbidity (NTU) | 20.6 | 28.2 | 24.4 | - | - | 7.7 | 104.8 | 18.4 | 14.0 | 31.2 | 26.0 |
| Chlorophyll a (μg/L) | 15.0 | 58.0 | 36.5 | - | - | 29.4 | 8.1 | 26.8 | 37.9 | 27.6 | 23.2 |
| Total Phosphorus as P (μg/L) | 109 | 119 | 114 | - | - | 66 | 117 | 111 | 151 | 111 | 239 |
| SRP as P (μg/L) | 5 | 1 | 3 | - | - | 16 | 46 | 4 | 1 | - | - |
| Total Nitrogen as N (mg/L) | 2.84 | 2.25 | 2.55 | - | - | 2.46 | 3.39 | 0.98 | 0.96 | 1.89 | 1.62 |
| (Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L) | 26 | 16 | 16 | - | - | 41 | 54 | - | - | - | - |
| (Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L) | 4.7 | 2.1 | 3.4 | - | - | 3.6 | 0.9 | - | - | - | - |
| Nitrate + Nitrite (NO3 + NO2) as N (mg/L) | 2.62 | 0.66 | 1.64 | - | - | 1.57 | 2.10 | 0.12 | 0.12 | 0.89 | 0.13 |
| TN:TP ratio | 26 | 19 | 23 | - | - | 44 | 29 | 9 | 10 | 17 | 7 |
| pH | 8.7 | 9.6 | 9.2 | - | - | 8.1 | 7.6 | 8.2 | 8.6 | 7.7 | 7.4 |
| Alkalinity as CaCO3 (mg/L) | 88 | 91 | 90 | - | - | 104 | 87 | 94 | 110 | 78 | 124 |
| Silica as Si (mg/L) | - | - | - | - | - | 4.02 | 11.98 | 2.00 | 2.16 | - | - |
| Dissolved Organic Carbon (mg/L) | 7.08 | 6.99 | 7.04 | - | - | 5.44 | 6.52 | 10.46 | 8.31 | - | - |
| Inorganic Suspended Solids (mg/L) | 6 | 5 | 6 | - | - | 8 | 37 | 11 | 6 | 13 | 13 |
| Volatile Suspended Solids (mg/L) | 11 | 8 | 9 | - | - | 5 | 12 | 6 | 8 | 4 | 8 |
| Total Suspended Solids (mg/L) | 18 | 13 | 15 | - | - | 12 | 49 | 17 | 15 | 18 | 22 |
| Carlson Trophic State Index (Secchi)* | 62 | 72 | 66 | - | - | 51 | 75 | 67 | 67 | 67 | 64 |
| Carlson Trophic State Index (Chl a)* | 57 | 70 | 66 | - | - | 64 | 51 | 63 | 66 | 63 | 61 |
| Carlson Trophic State Index (TP)* | 72 | 73 | 72 | - | - | 65 | 73 | 72 | 77 | 72 | 83 |
| *Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions. |