| Report Year: 2007 |
| Lake Minnewashta, Dickinson County |
| Summary Data Table |
| 011: ML 52 |
| 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) | 1.2 | 0.8 | 1.1 | 0.7 | 0.5 | 0.6 | 0.7 | 0.8 | 1.3 | 1.4 |
| Temperature(oC) | 22.2 | 24.1 | 26.8 | 27.0 | 24.5 | 24.5 | 21.0 | 24.3 | 23.3 | 23.8 |
| Dissolved Oxygen (mg/L) | 9.5 | 7.4 | 5.4 | 7.8 | 0.8 | 7.5 | 9.4 | 6.8 | 7.5 | 9.4 |
| Dissolved Oxygen Saturation (%) | 109 | 88 | 68 | 98 | 10 | 90 | 105 | 81.1 | 86.6 | 110.5 |
| Chlorophyll a (μg/L) | 16.5 | 56.2 | 23.6 | 33.3 | 85.1 | 80.4 | 32.0 | 46.7 | 27.6 | 37.1 |
| Total Phosphorus as P (μg/L) | 66 | - | 137 | 142 | 125 | 162 | 200 | 138 | 103 | 84 |
| Total Nitrogen as N (mg/L) | 1.13 | 1.03 | 0.65 | 0.28 | 1.52 | 0.82 | 1.08 | 0.89 | 1.22 | 0.98 |
| Microcystin (ng/L) | 31.8 | 1.2 | 0.8 | 316.1 | 64.4 | 118.0 | 113.2 | 92.2 | 1.4 | 3.5 |
| Carlson Trophic State Index (Secchi)* | 57 | 64 | 59 | 66 | 72 | 67 | 65 | 64 | 56 | 55 |
| Carlson Trophic State Index (Chl a)* | 58 | 70 | 62 | 65 | 74 | 74 | 65 | 68 | 63 | 66 |
| Carlson Trophic State Index (TP)* | 65 | - | 75 | 76 | 74 | 77 | 81 | 75 | 71 | 68 |
| *Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions. |
| Carlson Trophic State Index Definition |