Hancock County Lake Quality
Maine, 4 lakes, average grade A (Excellent)
Hancock County has 4 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. On average, Hancock County lakes grade an A. That puts it near the top of the Maine county ranking.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Killman Pond (A) is the cleanest in the county.
Quick Answers for Hancock County
Planning a trip? Check special fishing regulations for Killman Pond — or check the official Maine fishing regulations.
All Lakes in Hancock County
4 lakes4 graded lakes
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | AKillman PondHancock | A | 12.7 ft | 8 µg/L | 3 µg/L | No recent samples | Not recorded |
| 2 | AMiddle Chain LakeHancock | A | 14.1 ft | 8 µg/L | 3 µg/L | No recent samples | Not recorded |
| 3 | ASide Pistol LakeHancock | A | 16.7 ft | 9 µg/L | 3.6 µg/L | No recent samples | Not recorded |
| 4 | AUpper Chain LakeHancock | A | 14.5 ft | 8 µg/L | 3 µg/L | No recent samples | Not recorded |
Lake Match
Which lake suits how you actually use one?
Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of graded lakes that fit, with the water quality behind each one.
Other Counties in Maine
See how Hancock County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 39 states and 2 Canadian provinces.
Where to stay near Hancock County
Top-rated places to stay near Hancock County
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Source: EPA National Aquatic Resource Surveys, 2026.