Non-Compliance
Clean Air Act
Clean Water Act
RCRA
SOMERSWORTH WASTEWATER 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
-
99 BUFFUMSVILLE RD
SOMERSWORTH, NH 03878
View on map ↗ - County
- STRAFFORD County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 221320
- Inspections
- 8 · last Jul 30, 2025
- Total Penalties
- $0 · last Feb 24, 2017
- Registry ID
- 110020142987
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.
0
Air (CAA)
Qtrs Non-Compliant
Qtrs Non-Compliant
7
Water (CWA)
Qtrs Non-Compliant
Qtrs Non-Compliant
0
Hazardous Waste (RCRA)
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 | PR: Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) | Jun 30, 2025 | — | Open |
| cwa | Monitoring Violations - Frequency of Sampling Violation | Feb 18, 2022 | Feb 18, 2022 | Resolved |
| cwa | Reporting Violations - Late Submittal of DMRs | Feb 18, 2022 | Feb 18, 2022 | Resolved |
| cwa | Schedule Event unachieved but reported | Feb 19, 2009 | Mar 26, 2009 | Resolved |
| cwa | Schedule Event unachieved and not reported | Feb 19, 2009 | Mar 26, 2009 | Resolved |
| cwa | Schedule Event reported late | Feb 19, 2009 | — | Open |
| cwa | Schedule Event achieved late but reported | Feb 19, 2009 | — | Open |
| cwa | Schedule Event achieved late but reported | Feb 19, 2002 | — | Open |
| cwa | Schedule Event unachieved and not reported | Feb 19, 2002 | May 30, 2002 | Resolved |
| cwa | Schedule Event achieved late but reported | Feb 19, 2001 | — | Open |
| cwa | Schedule Event unachieved and not reported | Feb 19, 2001 | Dec 6, 2001 | Resolved |
| cwa | Schedule Event achieved late but reported | Jun 1, 1992 | — | Open |
| cwa | Schedule Event achieved late but reported | Jun 1, 1992 | — | 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 |
|---|---|---|---|---|---|---|
| E. coli, thermotol, MF, MTEC | DMR, Limited - Numeric Violation | 410.60 MPN/100mL | 406.00 | +1% | Feb 2026 | Open |
| E. coli, thermotol, MF, MTEC | DMR, Limited - Numeric Violation | 613.10 MPN/100mL | 406.00 | +51% | Dec 2025 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 3.90 mg/L | 6.50 | +40% | Jul 2025 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.02 mg/L | 0.14 | +629% | Dec 2024 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 43.18 kg/d | 41.77 | +3% | Oct 2024 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 44.17 kg/d | 41.77 | +6% | Sep 2024 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 44.90 kg/d | 41.77 | +8% | Aug 2024 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 46.04 kg/d | 41.77 | +10% | Jul 2024 | Resolved |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 4.63 kg/d | 4.31 | +7% | Jun 2024 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 45.31 kg/d | 41.77 | +8% | Jun 2024 | Resolved |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 15.07 kg/d | 4.31 | +249% | May 2024 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 51.30 kg/d | 41.77 | +23% | May 2024 | Resolved |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 2.23 mg/L | 0.75 | +197% | May 2024 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 42.13 kg/d | 41.77 | +1% | Apr 2024 | Resolved |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 1.80 mg/L | 6.50 | +72% | Jul 2022 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.40 mg/L | 0.14 | +900% | Jan 2022 | Open |
| E. coli, thermotol, MF, MTEC | DMR, Limited - Numeric Violation | 1,553.10 MPN/100mL | 406.00 | +283% | Nov 2021 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.68 mg/L | 0.14 | +386% | Oct 2021 | Open |
| E. coli, thermotol, MF, MTEC | DMR, Limited - Numeric Violation | 1,986.30 MPN/100mL | 406.00 | +389% | Aug 2021 | Open |
| E. coli, thermotol, MF, MTEC | DMR, Limited - Numeric Violation | 2,419.60 MPN/100mL | 406.00 | +496% | Jul 2021 | Open |
| E. coli, thermotol, MF, MTEC | DMR, Limited - Numeric Violation | 131.80 MPN/100mL | 126.00 | +5% | Jul 2021 | Open |
| E. coli, thermotol, MF, MTEC | DMR, Limited - Numeric Violation | 234.80 MPN/100mL | 126.00 | +86% | Jun 2021 | Open |
| E. coli, thermotol, MF, MTEC | DMR, Limited - Numeric Violation | 2,419.60 MPN/100mL | 406.00 | +496% | Jun 2021 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.63 mg/L | 0.14 | +350% | Feb 2021 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 66.00 mg/L | 50.00 | +32% | Jan 2021 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 298.32 kg/d | 272.40 | +10% | Jan 2021 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 43.80 mg/L | 30.00 | +46% | Jan 2021 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 57.00 mg/L | 45.00 | +27% | Jan 2021 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.34 mg/L | 0.14 | +857% | Dec 2020 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.70 mg/L | 0.14 | +400% | Oct 2020 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.92 mg/L | 0.14 | +1,271% | Feb 2020 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 23.00 mg/L | 15.00 | +53% | Sep 2019 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 26.60 mg/L | 17.00 | +56% | Sep 2019 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 11.90 mg/L | 10.00 | +19% | Aug 2019 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 168.80 kg/d | 129.39 | +30% | Aug 2019 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 21.40 mg/L | 15.00 | +43% | Aug 2019 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 254.42 kg/d | 143.92 | +77% | Aug 2019 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 0.80 mg/L | 0.75 | +7% | Aug 2019 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 4.90 kg/d | 4.31 | +14% | Aug 2019 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 4.00 mg/L | 6.50 | +38% | Aug 2019 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 32.00 mg/L | 17.00 | +88% | Aug 2019 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 246.48 kg/d | 143.92 | +71% | Aug 2019 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 153.36 kg/d | 129.39 | +19% | Aug 2019 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 24.90 mg/L | 15.00 | +66% | Aug 2019 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 31.00 mg/L | 17.00 | +82% | Aug 2019 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 11.20 mg/L | 10.00 | +12% | Aug 2019 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 17.00 mg/L | 15.00 | +13% | Jul 2019 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 19.60 mg/L | 17.00 | +15% | Jul 2019 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.62 mg/L | 0.14 | +343% | Nov 2018 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 4.10 mg/L | 6.50 | +37% | Jun 2018 | Open |
Enforcement Actions
Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.
CWA 309A AO For Compliance
Clean Water Act
· Case 01-1992-N039 · Dec 2, 1991
CWA 309A AO For Compliance
Clean Water Act
· Case 01-1985-N011 · Sep 3, 1985
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