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Sewage treatment plant, major discharger, Hampton, New Hampshire. NPDES permit NH0100625 expired Feb 28, 2026; its limits still apply. Last 12 months: over a limit 12 times (last August 2026), 2 of 20 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Copper, total [as Cu], daily maximum | 29 ug/L | ≤ 24 ug/L | 21% |
| March 2026 | pH, minimum | 6.4 SU | ≥ 6.5 SU | — |
| April 2026 | Copper, total [as Cu], daily maximum | 6.1 ug/L | ≤ 5.8 ug/L | 5% |
| April 2026 | Copper, total [as Cu], monthly average | 5.3 ug/L | ≤ 3.7 ug/L | 43% |
| May 2026 | Copper, total [as Cu], daily maximum | 6 ug/L | ≤ 5.8 ug/L | 3% |
| May 2026 | Copper, total [as Cu], monthly average | 5.4 ug/L | ≤ 3.7 ug/L | 46% |
| June 2026 | Copper, total [as Cu], daily maximum | 7.9 ug/L | ≤ 5.8 ug/L | 36% |
| June 2026 | Copper, total [as Cu], monthly average | 6.1 ug/L | ≤ 3.7 ug/L | 65% |
| July 2026 | Copper, total [as Cu], monthly average | 4.9 ug/L | ≤ 3.7 ug/L | 32% |
| July 2026 | Enterococci, daily maximum | 547.5 MPN/100mL | ≤ 104 #/100mL | 426% |
| August 2026 | Copper, total [as Cu], daily maximum | 21.6 ug/L | ≤ 5.8 ug/L | 272% |
| August 2026 | Copper, total [as Cu], monthly average | 9.2 ug/L | ≤ 3.7 ug/L | 149% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 50 mg/L | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 1176 lb/d | all year |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 1960 lb/d | all year |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 1764 lb/d | all year |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 8 SU | all year |
| pH | daily maximum | report only (SU) | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 1176 lb/d | all year |
| Solids, total suspended | daily maximum | ≤ 1960 lb/d | all year |
| Solids, total suspended | weekly average | ≤ 1764 lb/d | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | May–Oct |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | May–Oct |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | May–Oct |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.7 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.1 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.9 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.4 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | May–Oct |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | May–Oct |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | May–Oct |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | May–Oct |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | May–Oct |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | May–Oct |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | all year |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | all year |
| Arsenic, total [as As] | monthly average | report only (ug/L) | all year |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | monthly average | ≤ 3.7 ug/L | all year |
| Copper, total [as Cu] | monthly average | ≤ 15 ug/L | all year |
| Copper, total [as Cu] | daily maximum | ≤ 5.8 ug/L | all year |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | daily maximum | ≤ 24 ug/L | all year |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year |
| Coliform, fecal - % samples exceeding limit | monthly maximum | ≤ 10 % | all year |
| Coliform, fecal - % samples exceeding limit | monthly maximum | ≤ 10 % | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | rolling average | ≤ 4.7 MGD | all year |
| Chlorine, total residual | monthly average | ≤ 7.5 ug/L | all year |
| Chlorine, total residual | daily maximum | ≤ 13 ug/L | all year |
| Enterococci | monthly geometric mean | ≤ 35 #/100mL | all year |
| Enterococci | daily maximum | ≤ 104 #/100mL | all year |
| Coliform, fecal general | monthly geometric mean | ≤ 14 #/100mL | all year |
| Coliform, fecal general | monthly geometric mean | ≤ 14 #/100mL | all year |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year |
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | daily minimum | ≥ 100 % | all year |
| LC50 Static 48Hr Acute Menidia | daily minimum | ≥ 100 % | all year |
| Noel Statre 7Day Chronic Arbacia | daily minimum | ≥ 100 % | all year |
| Noel Statre 7Day Chronic Menidia | daily minimum | ≥ 100 % | all year |
Cited limits by parameter: New Hampshire's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/NH0100625 · MCP: https://passage-data.com/mcp