Lenawee County Lake Quality

Lenawee County's 32 monitored lakes fall in the moderate-density bracket for Michigan. The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. 2 of those lakes carry an A–F grade. The county-level summary describes that subset, not every water body listed. On average, Lenawee County lakes grade an A. That puts it near the top of the Michigan county ranking.

The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Round Lake (A); the most-stressed is Round Lake (A).