Safest Lakes to Swim In in Massachusetts
1 lakes in Massachusetts qualify as safest for swimming, all hold grade A or B and report chlorophyll-a (algae) under 10 µg/L. Always check local advisories on the day you swim.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Sherman Reservoir | Franklin | A | - | 9.7 µg/L | 1.9 µg/L |