Passage Data · Check a report · Use it from your AI
Sewage treatment plant, major discharger, Naugatuck, Connecticut. NPDES permit CT0100641 expired Aug 31, 2019; its limits still apply. Last 12 months: over a limit 4 times (last August 2026), 3 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| August 2026 | Solids, total suspended, daily maximum | 680 mg/L | ≤ 45 mg/L | 1411% |
| August 2026 | Solids, total suspended, monthly average | 54 mg/L | ≤ 30 mg/L | 80% |
| August 2026 | Zinc, total [as Zn], daily maximum | 42.79 kg/d | ≤ 5.68 kg/d | 653% |
| August 2026 | Zinc, total [as Zn], monthly average | 4.537 kg/d | ≤ 3.79 kg/d | 20% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. fahrenheit | instantaneous maximum | report only (deg F) | Jan, Mar, May, Jul, Sep, Nov |
| Flow rate | monthly average | report only (MGD) | all year |
| Flow rate | daily maximum | report only (MGD) | all year |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | all year |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| pH | instantaneous minimum | ≥ 6 SU | all year |
| pH | instantaneous maximum | ≤ 9 SU | all year |
| pH | instantaneous minimum | report only (SU) | Jan, Mar, May, Jul, Sep, Nov |
| pH | instantaneous maximum | report only (SU) | Jan, Mar, May, Jul, Sep, Nov |
| pH | instantaneous minimum | report only (SU) | Jan, Mar, May, Jul, Sep, Nov |
| pH | instantaneous maximum | report only (SU) | Jan, Mar, May, Jul, Sep, Nov |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 45 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, Apr, Jul, Oct |
| Solids, total suspended | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 16 mg/L | May |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 10 mg/L | Jun |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4 mg/L | Jul–Sep |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 8 mg/L | Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Arsenic, total [as As] | monthly average | report only (mg/L) | all year |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year |
| Arsenic, total [as As] | instantaneous maximum | report only (mg/kg) | Jan, Mar, May, Jul, Sep, Nov |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Arsenic, total [as As] | instantaneous maximum | report only (mg/L) | all year |
| Beryllium, total [as Be] | instantaneous maximum | report only (mg/kg) | Jan, Mar, May, Jul, Sep, Nov |
| Beryllium, total [as Be] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct, Dec |
| Beryllium, total [as Be] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Beryllium, total [as Be] | instantaneous maximum | report only (mg/L) | Jan, Mar, May, Jul, Sep, Nov |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Cadmium, total [as Cd] | instantaneous maximum | report only (mg/L) | Jan, Mar, May, Jul, Sep, Nov |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Chromium, total [as Cr] | instantaneous maximum | report only (mg/L) | Jan, Mar, May, Jul, Sep, Nov |
| Copper, total [as Cu] | monthly average | report only (mg/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Copper, total [as Cu] | instantaneous maximum | report only (mg/L) | Jan, Mar, May, Jul, Sep, Nov |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Iron, total [as Fe] | instantaneous maximum | report only (mg/L) | Jan, Mar, May, Jul, Sep, Nov |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Lead, total [as Pb] | instantaneous maximum | report only (mg/L) | Jan, Mar, May, Jul, Sep, Nov |
| Thallium, total [as Tl] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Thallium, total [as Tl] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Nickel, total [as Ni] | monthly average | ≤ 2.14 kg/d | all year |
| Nickel, total [as Ni] | daily maximum | ≤ 3.94 kg/d | all year |
| Nickel, total [as Ni] | daily maximum | report only (kg/d) | all year |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Nickel, total [as Ni] | instantaneous maximum | report only (mg/L) | Jan, Mar, Apr, May, Jul, Sep, Nov |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Zinc, total [as Zn] | monthly average | ≤ 3.79 kg/d | all year |
| Zinc, total [as Zn] | daily maximum | ≤ 5.68 kg/d | all year |
| Zinc, total [as Zn] | daily maximum | report only (kg/d) | all year |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Zinc, total [as Zn] | instantaneous maximum | report only (mg/L) | Jan, Mar, May, Jul, Sep, Nov |
| Antimony, total [as Sb] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Antimony, total [as Sb] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Aluminum, total [as Al] | instantaneous maximum | report only (mg/L) | Jan, Mar, May, Jul, Sep, Nov |
| Selenium, total [as Se] | monthly average | ≤ 35 kg/d | all year |
| Selenium, total [as Se] | daily maximum | ≤ 75 kg/d | all year |
| Selenium, total [as Se] | monthly average | report only (kg/d) | all year |
| Selenium, total [as Se] | instantaneous maximum | report only (mg/kg) | Jan, Mar, May, Jul, Sep, Nov |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Selenium, total [as Se] | instantaneous maximum | report only (mg/L) | Jan, Mar, May, Jul, Sep, Nov |
| Polychlorinated biphenyls [PCBs] | instantaneous maximum | report only (mg/kg) | Jan, Mar, May, Jul, Sep, Nov |
| Phenols | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Phenols | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Chlorine, total residual | monthly average | report only (mg/L) | May–Sep |
| Chlorine, total residual | daily maximum | ≤ .06 mg/L | May–Sep |
| Chlorine, total residual | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Chlorine, total residual | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| E. coli | average | ≤ 126 #/100mL | May–Sep |
| E. coli | instantaneous maximum | ≤ 410 #/100mL | May–Sep |
| Phosphorus, Total [Avg Seasonal Load Cap] | average | report only (lb/d) | Oct |
| Solids, total, percent | instantaneous minimum | report only (%) | Jan, Mar, May, Jul, Sep, Nov |
| Solids, fixed, % of total solids | instantaneous minimum | report only (%) | Jan, Mar, May, Jul, Sep, Nov |
| Solids, volatile % of total solids | instantaneous minimum | report only (%) | Jan, Mar, May, Jul, Sep, Nov |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Mercury, total [as Hg] | instantaneous maximum | report only (mg/L) | Jan, Mar, May, Jul, Sep, Nov |
| Zinc, sludge, total, dry weight [as Zn] | instantaneous maximum | report only (mg/kg) | Jan, Mar, May, Jul, Sep, Nov |
| Lead, sludge, total, dry weight [as Pb] | instantaneous maximum | report only (mg/kg) | Jan, Mar, May, Jul, Sep, Nov |
| Nickel, sludge, total, dry weight [as Ni] | instantaneous maximum | report only (mg/kg) | Jan, Mar, May, Jul, Sep, Nov |
| Mercury, sludge, total, dry weight [as Hg] | instantaneous maximum | report only (mg/kg) | Jan, Mar, May, Jul, Sep, Nov |
| Chromium, sludge, total, dry weight [as Cr] | instantaneous maximum | report only (mg/kg) | Jan, Mar, May, Jul, Sep, Nov |
| Copper, sludge, total, dry weight [as Cu] | instantaneous maximum | report only (mg/kg) | Jan, Mar, May, Jul, Sep, Nov, Dec |
| Cadmium, sludge, total, dry weight [as Cd] | instantaneous maximum | report only (mg/kg) | Jan, Mar, May, Jul, Sep, Nov |
| BOD, carbonaceous [5 day, 5 C] | monthly average | ≤ 15 mg/L | Jun–Oct |
| BOD, carbonaceous [5 day, 5 C] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec |
| BOD, carbonaceous [5 day, 5 C] | daily maximum | ≤ 25 mg/L | Jun–Oct |
| BOD, carbonaceous [5 day, 5 C] | daily maximum | ≤ 40 mg/L | Jan, Feb, Mar, Apr, May, Nov, 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) | Jan, Apr, Jul, Oct |
| BOD, carbonaceous [5 day, 5 C] | daily maximum | report only (mg/L) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| Solids, suspended percent removal | minimum % removal | ≥ 85 % | all year |
| Carbonaceous oxygen demand, % removal | minimum % removal | ≥ 85 % | all year |
| NOAEL Static 48Hr Acute D. pulex | minimum | ≥ 90 % survival | Jan, Apr, Jul, Oct |
| NOAEL Static 48Hr Acute D. pulex | minimum | report only (% survival) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
| NOAEL Static 48Hr Acute Pimephales promelas | minimum | ≥ 90 % survival | Jan, Apr, Jul, Oct |
| NOAEL Static 48Hr Acute Pimephales promelas | minimum | report only (% survival) | Feb, Mar, May, Jun, Aug, Sep, Nov, Dec |
Cited limits by parameter: Connecticut's rules and the federal ones.
· Save this facility as a site · Superfund sites nearby · Your permits on one board
On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/CT0100641 · MCP: https://passage-data.com/mcp