Is Morse Reservoir Polluted?
Yes — Morse Reservoir in Hamilton County, Indiana is on the EPA's Clean Water Act 303(d) impaired-waters list (2024 assessment cycle). It is cited for Algal growth, PCBs. No cleanup plan (TMDL) has been completed yet. "Impaired" is a legal designation, separate from the lake's EPA condition class water-quality readings: it means at least one designated use (such as swimming, aquatic life, or fish consumption) does not meet state standards for the listed pollutant.
EPA 303(d) Listing
| On 303(d) impaired list | Yes |
| Cleanup plan (TMDL) | Not yet written |
| Assessment cycle | 2024 |
| EPA IR category | 5 |
| Uses not supported | Aquatic life, Fish consumption |
| EPA names this lake in the listing | Yes |
| Location | Hamilton County, Indiana |
Pollutants Cited
- Algal growth — listed by EPA as exceeding water-quality standards for at least one designated use.
- PCBs — Polychlorinated biphenyls are legacy industrial pollutants that persist in sediment and bioaccumulate in fish. Like mercury, PCB listings drive fish-consumption advisories.
Specific parameters in the EPA record: Algae, PCBs in Fish Tissue.
What this means for using Morse Reservoir
Morse Reservoir's listing is driven by contaminants that build up in fish (PCBs), so the practical impact is on eating the fish, not on swimming. Follow the state fish-consumption advisory for Indiana. An impairment listing does not mean the lake is closed — most impaired lakes remain open for boating and swimming. It means a specific pollutant exceeds a standard for a specific use. See the full breakdown on the lake report. The official EPA assessment is available in the ATTAINS waterbody report.
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