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Sewage treatment plant, major discharger, Jewett City, Connecticut. NPDES permit CT0100269 expired Oct 31, 2025; its limits still apply. Last 12 months: over a limit 9 times (last August 2026), 62 required values missing, 4 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | NOAEL Static 48Hr Acute Pimephales promelas, minimum | 0 % | ≥ 90 % | 100% |
| December 2025 | Solids, total suspended, daily maximum | 54 mg/L | ≤ 50 mg/L | 8% |
| May 2026 | Phosphorus, total [as P], daily maximum | 2.7 mg/L | ≤ 2.18 mg/L | 24% |
| May 2026 | Phosphorus, total [as P], monthly average | 2.76 mg/L | ≤ 1.09 mg/L | 153% |
| June 2026 | Phosphorus, total [as P], daily maximum | 6.9 mg/L | ≤ 2.18 mg/L | 217% |
| June 2026 | Phosphorus, total [as P], daily maximum | 6.9 mg/L | ≤ 2.18 mg/L | 217% |
| June 2026 | Phosphorus, total [as P], monthly average | 7.3 mg/L | ≤ 1.09 mg/L | 570% |
| June 2026 | Phosphorus, total [as P], monthly average | 7.3 mg/L | ≤ 1.09 mg/L | 570% |
| August 2026 | Ultraviolet light dosage, instantaneous minimum | 20.31 mW-sec/cm2 | ≥ 30 mW-sec/cm2 | 32% |
| 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 | ≤ 30 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 | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| pH | instantaneous minimum | ≥ 6 SU | all year |
| pH | instantaneous maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Phosphorus, total [as P] | monthly average | ≤ 1.09 mg/L | Apr–Oct |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Nov, Dec |
| Phosphorus, total [as P] | daily maximum | ≤ 2.18 mg/L | Apr–Oct |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Arsenic, total [as As] | instantaneous maximum | report only (mg/kg) | Mar, Jun, Sep, Dec |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Beryllium, total [as Be] | instantaneous maximum | report only (mg/kg) | Mar, Jun, Sep, Dec |
| Beryllium, total [as Be] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Beryllium, total [as Be] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Thallium, total [as Tl] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Thallium, total [as Tl] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Antimony, total [as Sb] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Antimony, total [as Sb] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Polychlorinated biphenyls [PCBs] | instantaneous maximum | report only (mg/kg) | Mar, Jun, Sep, Dec |
| Phenols | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Phenols | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| Chlorine, total residual | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Chlorine, total residual | daily maximum | report only (mg/L) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| E. coli | 7-day geometric mean | ≤ 126 CFU/100mL | May–Sep |
| E. coli | maximum | ≤ 410 CFU/100mL | May–Sep |
| Phosphorus, Total [Avg Seasonal Load Cap] | monthly average | ≤ 2.92 lb/d | Oct |
| Ultraviolet light dosage | instantaneous minimum | ≥ 30 mW-sec/cm2 | May–Sep |
| Solids, total, percent | minimum | report only (%) | Mar, Jun, Sep, Dec |
| Solids, fixed, % of total solids | minimum | report only (%) | Mar, Jun, Sep, Dec |
| Solids, volatile % of total solids | minimum | report only (%) | Mar, Jun, Sep, Dec |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Zinc, sludge, total, dry weight [as Zn] | instantaneous maximum | report only (mg/kg) | Mar, Jun, Sep, Dec |
| Lead, sludge, total, dry weight [as Pb] | instantaneous maximum | report only (mg/kg) | Mar, Jun, Sep, Dec |
| Nickel, sludge, total, dry weight [as Ni] | instantaneous maximum | report only (mg/kg) | Mar, Jun, Sep, Dec |
| Mercury, sludge, total, dry weight [as Hg] | instantaneous maximum | report only (mg/kg) | Mar, Jun, Sep, Dec |
| Chromium, sludge, total, dry weight [as Cr] | instantaneous maximum | report only (mg/kg) | Mar, Jun, Sep, Dec |
| Copper, sludge, total, dry weight [as Cu] | instantaneous maximum | report only (mg/kg) | Mar, Jun, Sep, Dec |
| Cadmium, sludge, total, dry weight [as Cd] | instantaneous maximum | report only (mg/kg) | Mar, Jun, Sep, Dec |
| BOD, carbonaceous [5 day, 5 C] | monthly average | report only (mg/L) | all year |
| BOD, carbonaceous [5 day, 5 C] | daily maximum | report only (mg/L) | all year |
| 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 | ≥ 90 % | Mar, Jun, Sep, Dec |
| NOAEL Static 48Hr Acute D. pulex | minimum | report only (%) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
| NOAEL Static 48Hr Acute Pimephales promelas | minimum | ≥ 90 % | Mar, Jun, Sep, Dec |
| NOAEL Static 48Hr Acute Pimephales promelas | minimum | report only (%) | Jan, Feb, Apr, May, Jul, Aug, Oct, Nov |
Cited limits by parameter: Connecticut's rules and the federal ones.
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