| Report Year: 2011 |
| Lake of Three Fires, Taylor County |
| Summary Data Table |
| Parameter | 6/14/2011 | 8/1/2011 | 9/12/2011 | 2011 | 2010 | 2009 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Lake Depth (m) | 6.6 | 6.4 | 6.4 | 6.5 | 6.4 | 6.6 | - | - | 6.6 | 7.8 | 3.6 | 3.9 | 3.8 | 4.0 |
| Thermocline Depth (m) | 3.5 | 2.3 | 4.2 | 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) | 0.9 | 0.4 | 0.8 | 0.7 | 0.5 | 0.7 | - | - | 1.9 | 0.4 | 0.6 | 0.6 | 0.6 | 0.8 |
| Temperature(oC) | 21.7 | 29.8 | 22.5 | 24.7 | 24.3 | 24.2 | - | - | 24.8 | 22.8 | 24.3 | 27.4 | 24.2 | 26.1 |
| Dissolved Oxygen (mg/L) | 8.8 | 8.4 | 2.7 | 6.6 | 4.9 | 9.5 | - | - | 9.4 | 2.2 | 8.3 | 14.0 | 8.3 | 8.7 |
| Dissolved Oxygen Saturation (%) | 100 | 111 | 32 | 80.7 | 58.5 | 113.0 | - | - | 113.1 | 25.5 | 98.9 | 176.1 | 101.2 | 107.2 |
| Specific Conductivity (μS/cm) | 250.0 | 200.0 | 230.0 | 226.7 | 186.7 | 196.7 | - | - | 267.2 | 230.4 | 287.5 | 236.7 | 195.8 | 214.9 |
| Turbidity (NTU) | 21.8 | 32.5 | 11.3 | 21.9 | 19.1 | 21.7 | - | - | 7.7 | 104.8 | 18.4 | 14.0 | 31.2 | 26.0 |
| Chlorophyll a (μg/L) | 51.0 | 95.8 | 20.7 | 55.9 | 23.7 | 44.7 | - | - | 29.4 | 8.1 | 26.8 | 37.9 | 27.6 | 23.2 |
| Total Phosphorus as P (μg/L) | 63.0 | 129.6 | 83.6 | 92.1 | 175.1 | 110.4 | - | - | 64 | 118 | 112 | 152 | 112 | - |
| SRP as P (μg/L) | <11 | <11 | <11 | <11 | 60.8 | <9 | - | - | <1 | 44.2 | 4.8 | <1 | - | - |
| TKN (mg/L) | 1.4 | 2.6 | <0.5 | 1 | 1 | - | - | - | - | - | - | - | - | - |
| Total Dissolved Solids (g/L) | 0.2 | 0.1 | 0.2 | 0.1 | - | - | - | - | - | - | - | - | - | - |
| Total Nitrogen as N (mg/L) | - | - | - | - | - | 2.2 | - | - | 2.46 | 3.39 | 0.98 | 0.96 | 1.89 | 1.62 |
| (Phenate)Ammonia Nitrogen (NH3 + NH4+) as N (μg/L) | <145 | <145 | 497.85 | 197 | 306 | <130 | - | - | 40 | 53 | - | - | - | - |
| (Phenate)Ammonia Nitrogen (NH3) as N (un-ionized)(μg/L) | <PQL | <PQL | 8 | <PQL | <PQL | <130 | - | - | 4 | 1 | - | - | - | - |
| Nitrate + Nitrite (NO3 + NO2) as N (mg/L) | 0.98 | <0.4 | <0.4 | <0.4 | <0.5 | - | - | - | 1.60 | 2.14 | 0.12 | 0.12 | 0.85 | 0.12 |
| TN:TP ratio | - | - | - | - | - | 20 | - | - | 44 | 29 | 9 | 10 | 17 | - |
| pH | 8.8 | 8.8 | 7.5 | 8.4 | 8.1 | 9.3 | - | - | 8.1 | 7.6 | 8.2 | 8.6 | 7.7 | 7.4 |
| Alkalinity as CaCO3 (mg/L) | 111 | 82 | 83 | 92 | 83 | 88 | - | - | 104 | 87 | 94 | 110 | 78 | 124 |
| Silica as Si (mg/L) | - | - | - | - | - | - | - | - | 4.02 | 11.98 | 2.00 | 2.16 | - | - |
| Dissolved Organic Carbon (mg/L) | 8.13 | <7.6 | <7.6 | <7.6 | 7 | 8 | - | - | 5.44 | 6.52 | 10.46 | 8.31 | - | - |
| Inorganic Suspended Solids (mg/L) | <5 | <5 | <5 | <5 | 5 | 4 | - | - | 8 | 37 | 11 | 6 | 13 | 13 |
| Volatile Suspended Solids (mg/L) | <8 | 17 | <8 | 11 | 10 | 10 | - | - | 5 | 12 | 6 | 8 | 4 | 8 |
| Total Suspended Solids (mg/L) | 11 | 22 | 7 | 13 | 15 | 15 | - | - | 12 | 49 | 17 | 15 | 18 | 22 |
| Carlson Trophic State Index (Secchi)* | 62 | 73 | 64 | 66 | 69 | 65 | - | - | 51 | 75 | 67 | 67 | 67 | 64 |
| Carlson Trophic State Index (Chl a)* | 69 | 75 | 60 | 70 | 62 | 68 | - | - | 64 | 51 | 63 | 66 | 63 | 61 |
| Carlson Trophic State Index (TP)* | 64 | 74 | 68 | 69 | 79 | 72 | - | - | 64 | 73 | 72 | 77 | 72 | - |
| *Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions. |