How Clean Is Charles Mill Reservoir?
Charles Mill Reservoir does not have enough monitoring data to grade. It does not have enough recent summer sampling for a letter grade, so it is shown unrated. Unrated means the measurements are missing, not that the water is poor. Everything the monitoring record does contain is below. Water clarity (Secchi depth): 0.9 ft. Trophic State Index: 79.
Cleanliness Snapshot
| Metric | Charles Mill Reservoir | Ohio avg |
|---|---|---|
| Overall Grade | NR | D |
| Water Clarity (Secchi) | 0.9 ft | — |
| Trophic State Index | 79 | <50 = clean |
How does Charles Mill Reservoir compare?
Charles Mill Reservoir is not rated for water quality: it does not have enough recent summer sampling for a letter grade, so it is not compared with the Ohio state average. Multi-year monitoring data shows water quality is improving based on 2 years of records.
Watch Charles Mill Reservoir water quality
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