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LakeQuality
C

Amherst County Lake Quality

Virginia, 7 lakes, average grade C (Fair)

Only 7 lakes in Amherst County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. Amherst County averages to a C. The distribution behind that average matters more than the letter: a few stressed lakes versus many decent ones can produce the same average as the inverse.

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. Pedlar River Reservoir (A) is the cleanest in the county.

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All Lakes in Amherst County

RankLakeGradeClarityPhosphorus
1Pedlar River ReservoirA7.5 ft10 µg/L
2Mill Cr ReservoirB3.6 ft20 µg/L
3Northeast Arm of Mill Creek LakeB4.1 ft20 µg/L
4Mill Creek ReservoirB3.6 ft20 µg/L
5North Arm of Mill Creek LakeB3.6 ft20 µg/L

See how Amherst County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 34 states.

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Source: EPA National Aquatic Resource Surveys, 2026.