Non-Compliance
Clean Water Act
MANCHESTER WATER WORKS - MERRIMACK RIVER TREATMENT PLANT
Quick Summary
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $0 in total penalties since records began.
- Address
-
18 KIMBALL DRIVE
HOOKSETT, NH 03106
View on map ↗ - County
- MERRIMACK County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 221310
- Inspections
- 1 · last Aug 28, 2025
- Total Penalties
- $0
- Registry ID
- 110071443783
Compliance Status (Last 12 Quarters)
Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.
8
Water (CWA)
Qtrs Non-Compliant
Qtrs Non-Compliant
Compliance Violations
Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.
| Program | Type | Violation Date | Return to Compliance | Status |
|---|---|---|---|---|
| cwa | Monitoring Violations - Improper Analysis or Lab Error | Aug 28, 2025 | — | Open |
Discharge Limit Exceedances
Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.
| Pollutant | Violation | Reported | Limit | Exceedance | Period | Status |
|---|---|---|---|---|---|---|
| Manganese, total [as Mn] | DMR, Limited - Numeric Violation | 2.18 kg/d | 0.19 | +1,043% | Nov 2025 | Resolved |
| Iron, total [as Fe] | DMR, Limited - Numeric Violation | 2.68 kg/d | 1.13 | +136% | Nov 2025 | Open |
| Manganese, total [as Mn] | DMR, Limited - Numeric Violation | 0.46 kg/d | 0.19 | +143% | Sep 2025 | Resolved |
| Manganese, total [as Mn] | DMR, Limited - Numeric Violation | 0.36 kg/d | 0.19 | +90% | Aug 2025 | Resolved |
| Aluminum, total [as Al] | DMR, Limited - Numeric Violation | 0.11 mg/L | 0.09 | +26% | Jun 2025 | Open |
| Manganese, total [as Mn] | DMR, Limited - Numeric Violation | 0.50 kg/d | 0.19 | +164% | Jun 2025 | Resolved |
| Manganese, total [as Mn] | DMR, Limited - Numeric Violation | 0.30 kg/d | 0.19 | +60% | May 2025 | Resolved |
| Manganese, total [as Mn] | DMR, Limited - Numeric Violation | 0.47 kg/d | 0.19 | +148% | Apr 2025 | Resolved |
| Iron, total [as Fe] | DMR, Limited - Numeric Violation | 1.31 kg/d | 1.13 | +15% | Apr 2025 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.75 mg/L | 1.00 | +75% | Oct 2024 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.12 mg/L | 1.00 | +12% | Oct 2024 | Open |
| Manganese, total [as Mn] | DMR, Limited - Numeric Violation | 0.39 kg/d | 0.19 | +102% | Aug 2024 | Resolved |
| Manganese, total [as Mn] | DMR, Limited - Numeric Violation | 0.75 kg/d | 0.19 | +295% | Jul 2024 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 3.02 mg/L | 1.00 | +202% | Jul 2024 | Open |
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