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Sewage treatment plant, East Haddam, Connecticut. NPDES permit CT0101761 expired Jun 30, 2024; its limits still apply. Last 12 months: over a limit 3 times (last August 2026), 3 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| July 2026 | Enterococci, 30-day geometric mean | 36 #/100mL | ≤ 35 #/100mL | 3% |
| August 2026 | Enterococci, 30-day geometric mean | 689 #/100mL | ≤ 35 #/100mL | 1869% |
| August 2026 | Enterococci, maximum | 1200 #/100mL | ≤ 500 #/100mL | 140% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Flow rate | monthly average | report only (MGD) | all year |
| Flow rate | daily maximum | report only (MGD) | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | all year |
| BOD, 5-day, 20 deg. C | instantaneous maximum | ≤ 40 mg/L | all year |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | instantaneous maximum | report only (mg/L) | Feb, Aug |
| pH | instantaneous minimum | ≥ 6 SU | all year |
| pH | instantaneous maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year |
| Solids, total suspended | instantaneous maximum | ≤ 40 mg/L | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Solids, total suspended | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Nitrogen, total [as N] | monthly average | ≤ 4 lb/d | all year |
| Nitrogen, total [as N] | instantaneous maximum | report only (lb/d) | all year |
| Nitrogen, ammonia total [as N] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Nitrogen, nitrite total [as N] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Nitrogen, nitrate total [as N] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Phosphorus, total [as P] | instantaneous maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Cyanide, total [as CN] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Cyanide, free [amenable to chlorination] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Arsenic, total [as As] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Beryllium, total [as Be] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Cadmium, total [as Cd] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Chromium, hexavalent [as Cr] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Chromium, total [as Cr] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Copper, total [as Cu] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Iron, total [as Fe] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Lead, total [as Pb] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Thallium, total [as Tl] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Nickel, total [as Ni] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Silver, total [as Ag] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Zinc, total [as Zn] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Antimony, total [as Sb] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Aluminum, total [as Al] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Selenium, total [as Se] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Polychlorinated biphenyls [PCBs] | instantaneous maximum | report only (mg/kg) | Aug |
| Phenols | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Chlorine, total residual | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Enterococci | 30-day geometric mean | ≤ 35 #/100mL | May–Sep |
| Enterococci | maximum | ≤ 500 #/100mL | May–Sep |
| Arsenic, sludge tot. dry wt [as As] | instantaneous maximum | report only (mg/kg) | Aug |
| Beryllium, sludge, tot. dry wt [as Be] | instantaneous maximum | report only (mg/kg) | Aug |
| Solids, total, percent | instantaneous minimum | report only (%) | Aug |
| Solids, fixed, % of total solids | instantaneous minimum | report only (%) | Aug |
| Solids, volatile % of total solids | instantaneous minimum | report only (%) | Aug |
| Mercury, total [as Hg] | instantaneous maximum | report only (mg/L) | Feb, Aug |
| Zinc, sludge, total, dry weight [as Zn] | instantaneous maximum | report only (mg/kg) | Aug |
| Lead, sludge, total, dry weight [as Pb] | instantaneous maximum | report only (mg/kg) | Aug |
| Nickel, sludge, total, dry weight [as Ni] | instantaneous maximum | report only (mg/kg) | Aug |
| Mercury, sludge, total, dry weight [as Hg] | instantaneous maximum | report only (mg/kg) | Aug |
| Chromium, sludge, total, dry weight [as Cr] | instantaneous maximum | report only (mg/kg) | Aug |
| Copper, sludge, total, dry weight [as Cu] | instantaneous maximum | report only (mg/kg) | Aug |
| Cadmium, sludge, total, dry weight [as Cd] | instantaneous maximum | report only (mg/kg) | Aug |
| BOD, 5-day, percent removal | minimum % removal | ≥ 85 % | all year |
| Solids, suspended percent removal | minimum % removal | ≥ 85 % | all year |
| NOAEL Static 48Hr Acute D. pulex | minimum | report only (% survival) | Feb, Aug |
| NOAEL Static 48Hr Acute Pimephales promelas | minimum | report only (% survival) | Feb, Aug |
Cited limits by parameter: Connecticut'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/CT0101761 · MCP: https://passage-data.com/mcp