Is There a Cleaner Lake Near Simpson Park Lake?
Compared against 5 graded lakes within 30 miles, in Missouri.
Simpson Park Lake holds Grade D (Nutrient-rich). Of the 5 lakes within 30 miles of it that carry a grade, none scores higher on nutrients and algae, so Simpson Park Lake is the cleanest graded water in that radius. Lakes nearby without enough recent sampling to earn a letter are not part of that comparison.
The graded lakes it was measured against
| Lake | County | Grade | Distance | Clarity |
|---|---|---|---|---|
| Simpson Park Lake | St. Louis County | D | This lake | 1.9 ft |
| Fon-du-Lac Reservoir | Jefferson County | F | 4.7 mi | 1.3 ft |
| Mallard Lake | St. Louis County | F | 10.1 mi | 1.9 ft |
| Creve Coeur Lake | St. Louis County | F | 10.7 mi | 1.6 ft |
| Boathouse Lake | St. Louis city County | D | 10.8 mi | 2.3 ft |
| Creve Coeur Lake | St. Louis County | F | 11 mi | 1.6 ft |
What the comparison covers
A grade on LakeQuality comes from EPA Water Quality Portal samples: phosphorus, nitrogen, chlorophyll-a and turbidity, measured against EPA National Lakes Assessment ecoregion classes. Secchi clarity is shown and is not scored. This page compares Simpson Park Lake only with neighbouring lakes in Missourithat carry a letter of their own, within 30 miles. A nearby lake with too little recent sampling has no letter to compare, so it is absent from the table rather than ranked below. Where a driving distance is not published for a lake, the table says so instead of estimating one.