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Cleaner Lakes Than Rocky River Reservoir

5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.

Rocky River Reservoir carries a Grade F (Very Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. Bunch Lake (Randolph County, Grade B, 22 mi away) is the closest meaningful upgrade.

Reviewed by LakeQuality Editorial Team · Updated
1
B

Bunch Lake

Randolph County, North Carolina · 22 mi from Rocky River Reservoir
  • +Two grade letters higher (F → B)
  • +Lower phosphorus (20 vs 70 µg/L)
2
C

Lake Mackintosh

Guilford County, North Carolina · 17 mi from Rocky River Reservoir
  • +Two grade letters higher (F → C)
  • ++2 ft water clarity
  • +Lower phosphorus (30 vs 70 µg/L)
3
C

Cane Creek Reservoir

Orange County, North Carolina · 17.6 mi from Rocky River Reservoir
  • +Two grade letters higher (F → C)
  • ++1.7 ft water clarity
  • +Lower phosphorus (45 vs 70 µg/L)
4
C

Back Creek Lake

Randolph County, North Carolina · 22.2 mi from Rocky River Reservoir
  • +Two grade letters higher (F → C)
  • +Lower phosphorus (40 vs 70 µg/L)
5
D

Randleman Lake

Randolph County, North Carolina · 21 mi from Rocky River Reservoir
  • +Higher grade (F → D)
  • ++1.3 ft water clarity
  • +Lower phosphorus (40 vs 70 µg/L)

Reading the cohort

Within 30 miles of Rocky River Reservoir, 5 water bodies score higher than its Grade F on the same EPA water-quality metrics. That density of cleaner options is itself a signal — when several nearby lakes score better on the same indicators, the issues at Rocky River Reservoir are typically lake-specific (depth, watershed inflow, stratification pattern) rather than regional. The choice for a swim, paddle, or fishing trip is genuinely between meaningfully different water bodies, not between marginal differences in the same dataset.

The nearest cleaner alternative — Bunch Lake in Randolph County — sits 22 miles from Rocky River Reservoir, putting it firmly in "destination trip" rather than "neighborhood swap" range. The water-quality gap has to be the deciding factor; for a casual outing, Rocky River Reservoir is the practical choice and the cleaner options are reserved for purpose-specific visits.

The EPA water-quality grading combines clarity (Secchi depth), phosphorus, and chlorophyll-a measurements from state environmental sampling. A higher letter grade reflects measurably cleaner water on those indicators, not subjective beauty or access quality — a Grade A lake might have worse boat-launch facilities or shoreline access than a Grade C neighbor, so the ranking is one input alongside the rest of trip planning. See the methodology page for the full grading formula.

How this list is built

Every lake on LakeQuality has a calculated grade from EPA Water Quality Portal samples — secchi depth, total phosphorus, and chlorophyll-a measured against Metropolitan Council thresholds. To suggest cleaner alternatives, we filter lakes within 30 miles to those with a strictly higher numeric score, then rank by grade improvement with a small proximity tiebreak. Cross-state and limited-data lakes are excluded so the list stays locally relevant.

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