| Report Year: 2007 |
| Upper Gar Lake, Dickinson County |
| Summary Data Table |
| 011: UGL 51 |
| Parameter | 6/12
(011) | 6/25
(011) | 7/10
(011) | 7/19
(011) | 8/5
(011) | 8/22
(011) | 9/2
(011) | 2007 | 2006 | 2005 |
| Secchi Disk Depth (m) | 1.1 | 1.1 | 0.5 | 0.6 | 0.4 | 0.6 | 0.6 | 0.7 | 1.0 | 1.1 |
| Temperature(oC) | 22.0 | 23.1 | 26.2 | 27.0 | 23.5 | 24.0 | 21.0 | 23.8 | 22.6 | 23.2 |
| Dissolved Oxygen (mg/L) | 7.5 | 6.7 | 7.2 | 7.8 | 2.2 | 8.1 | 6.4 | 6.6 | 7.0 | 9.4 |
| Dissolved Oxygen Saturation (%) | 86 | 78 | 89 | 98 | 26 | 96 | 72 | 77.8 | 80.7 | 110.1 |
| Chlorophyll a (μg/L) | 7.2 | 13.7 | 31.9 | 30.2 | 110.9 | 50.7 | 27.7 | 38.9 | 35.7 | 49.8 |
| Total Phosphorus as P (μg/L) | 96 | 83 | 158 | 157 | 107 | 212 | 215 | 147 | 146 | 82 |
| Total Nitrogen as N (mg/L) | 1.42 | 0.95 | 0.60 | 0.28 | 1.08 | 0.78 | 1.09 | 0.85 | 1.40 | 1.14 |
| Microcystin (ng/L) | 10.5 | 2.3 | 40.3 | 49.8 | 35.9 | 25.9 | 28.9 | 27.7 | 3.2 | 2.6 |
| Carlson Trophic State Index (Secchi)* | 59 | 59 | 69 | 69 | 72 | 67 | 67 | 65 | 60 | 58 |
| Carlson Trophic State Index (Chl a)* | 50 | 56 | 65 | 64 | 77 | 69 | 63 | 67 | 66 | 69 |
| Carlson Trophic State Index (TP)* | 70 | 68 | 77 | 77 | 72 | 81 | 82 | 76 | 76 | 68 |
| *Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions. |
| Carlson Trophic State Index Definition |