| Report Year: 2007 |
| Little Spirit Lake, Dickinson County |
| Summary Data Table |
| 011: LSL 1 012: LSL 2 |
| Parameter | 6/5
(011) | 6/5
(012) | 6/18
(011) | 6/18
(012) | 7/9
(011) | 7/9
(012) | 7/22
(011) | 7/22
(012) | 8/6
(011) | 8/6
(012) | 8/20
(011) | 8/20
(012) | 9/10
(011) | 9/10
(012) | 2007 | 2006 | 2005 |
| Secchi Disk Depth (m) | 0.6 | 0.2 | 0.4 | 0.3 | 0.2 | 0.2 | 2.1 | 1.9 | 0.4 | 0.8 | 1.4 | 1.7 | 0.3 | 1.0 | 0.8 | 0.3 | 0.6 |
| Temperature(oC) | 19.0 | 19.0 | 24.0 | 24.0 | 26.0 | 26.0 | 26.0 | 27.0 | 24.0 | 24.0 | 23.0 | 23.8 | 21.0 | 21.0 | 23.4 | 23.8 | 22.8 |
| Dissolved Oxygen (mg/L) | 8.3 | 10.0 | 6.0 | 7.0 | 3.6 | 4.2 | 9.2 | 11.0 | 3.0 | 1.4 | 2.8 | 2.8 | 6.2 | 5.4 | 5.8 | 7.8 | 7.0 |
| Dissolved Oxygen Saturation (%) | 89 | 108 | 71 | 83 | 44 | 52 | 113 | 138 | 36 | 17 | 33 | 33 | 70 | 61 | 67.7 | 92.5 | 81.3 |
| Chlorophyll a (μg/L) | - | 87.1 | - | 123.4 | 92.5 | 225.3 | 220.6 | 237.6 | 85.4 | 21.8 | 5.5 | 3.2 | 13.2 | - | 101.4 | 59.6 | 414.1 |
| Total Phosphorus as P (μg/L) | 65 | 62 | 125 | 113 | 198 | 308 | 336 | 391 | 178 | 166 | 305 | 323 | 399 | 346 | 237 | 133 | 234 |
| Total Nitrogen as N (mg/L) | 1.38 | 1.34 | 0.28 | 0.28 | 0.28 | 0.28 | 0.35 | 0.40 | 1.56 | 1.94 | 2.27 | 2.61 | 2.63 | 2.38 | 1.22 | 1.91 | 2.04 |
| Microcystin (ng/L) | 52.6 | 112.5 | 34.1 | - | 108.2 | - | 11434.2 | - | 243.5 | - | 26.3 | - | 2.4 | - | 1501.7 | 3.4 | 3.4 |
| Carlson Trophic State Index (Secchi)* | 68 | 81 | 75 | 80 | 81 | 85 | 49 | 51 | 75 | 64 | 56 | 52 | 80 | 61 | 63 | 77 | 68 |
| Carlson Trophic State Index (Chl a)* | - | 74 | - | 78 | 75 | 84 | 84 | 84 | 74 | 61 | 47 | 42 | 56 | - | 76 | 71 | 90 |
| Carlson Trophic State Index (TP)* | 64 | 64 | 74 | 72 | 80 | 87 | 88 | 90 | 79 | 78 | 87 | 87 | 91 | 88 | 83 | 75 | 83 |
| *Index values generally range between 0 and 100, with increasing values indicating more eutrophic conditions. |
| Carlson Trophic State Index Definition |