Is There a Cleaner Lake Near Rock Lake?
Compared against 7 graded lakes nearby, in Wisconsin.
Rock Lake holds Grade B (Good). Of the 7 lakes neighbouring it that carry a grade, none scores higher on nutrients and algae, so Rock Lake is the cleanest graded water among its neighbours. 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 |
|---|---|---|---|---|
| Rock Lake | Jefferson County | B | This lake | 12 ft |
| Mud Lake | Jefferson County | D | Nearby | 2.3 ft |
| Lake Ripley | Jefferson County | B | Nearby | 9 ft |
| Red Cedar Lake | Jefferson County | B | Nearby | 4 ft |
| Rice Lake | Dane County | D | Nearby | 1.5 ft |
| Lake Koshkonong | Jefferson County | D | Nearby | 1.7 ft |
| Lake Kegonsa | Dane County | D | Nearby | 3.7 ft |
| Clear Lake | Rock County | C | Nearby | 2.8 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 Rock Lake only with neighbouring lakes in Wisconsinthat carry a letter of their own. 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.