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Colleges And Universities, Groton, Connecticut. NPDES permit CT0028631, in force until Jun 30, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | instantaneous maximum | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| Flow rate | monthly average | report only (gal/d) | all year | 001 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 001 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 001 |
| pH | daily maximum | report only (SU) | all year | 001 |
| pH | daily maximum | report only (SU) | all year | 001 |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Salinity | daily maximum | report only (ppk) | all year | 001 |
| Salinity | daily maximum | report only (ppk) | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | Jul, Oct | 001 |
| Solids, total suspended | instantaneous maximum | report only (mg/L) | Jul, Oct | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Jul, Oct | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jul, Oct | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jul, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jul, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | Jul, Oct | 001 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | Jul, Oct | 001 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | Jul, Oct | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Jul, Oct | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jul, Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Jul, Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Jul, Oct | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jul, Oct | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | 001 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | 001 |
| Copper, total [as Cu] | monthly average | report only (mg/L) | Jul, Oct | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Jul, Oct | 001 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 001 |
| Lead, dissolved [as Pb] | daily maximum | report only (ug/L) | all year | 001 |
| Lead, dissolved [as Pb] | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | monthly average | report only (mg/L) | Jul, Oct | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Jul, Oct | 001 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, total [as Zn] | monthly average | report only (mg/L) | Jul, Oct | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Jul, Oct | 001 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 001 |
| Flow, maximum during 24 hr period | daily maximum | ≤ 720000 gal/d | all year | 001 |
| Chlorine, total residual | monthly average | report only (mg/L) | Jul, Oct | 001 |
| Chlorine, total residual | daily maximum | report only (mg/L) | Jul, Oct | 001 |
| Chlorine, total residual | daily maximum | report only (ug/L) | all year | 001 |
| Chlorine, total residual | daily maximum | report only (ug/L) | all year | 001 |
| Specific Conductance | daily maximum | report only (umho/sec) | all year | 001 |
| Specific Conductance | daily maximum | report only (umho/sec) | all year | 001 |
| Date of Sample Collection | daily maximum | report only (date) | all year | 001 |
| Date of Sample Collection | daily maximum | report only (date) | all year | 001 |
| pH, maximum | instantaneous maximum | ≤ 8.5 SU | all year | 001 |
| pH, minimum | instantaneous minimum | ≥ 6.8 SU | all year | 001 |
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | minimum | ≥ 100 % | all year | 001 |
| LC50 Static 48Hr Acute Menidia | minimum | ≥ 100 % | all year | 001 |
| Temperature, water deg. fahrenheit | instantaneous maximum | report only (deg F) | all year | 002 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 002 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 002 |
| Flow rate | monthly average | report only (gal/d) | all year | 002 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 002 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 002 |
| pH | daily maximum | report only (SU) | all year | 002 |
| pH | daily maximum | report only (SU) | all year | 002 |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Salinity | daily maximum | report only (ppk) | all year | 002 |
| Salinity | daily maximum | report only (ppk) | all year | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | Jul, Oct | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jul, Oct | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Jul, Oct | 002 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jul, Oct | 002 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jul, Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jul, Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | Jul, Oct | 002 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | Jul, Oct | 002 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | Jul, Oct | 002 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Jul, Oct | 002 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jul, Oct | 002 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Jul, Oct | 002 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Jul, Oct | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jul, Oct | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | 002 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | monthly average | report only (mg/L) | Jul, Oct | 002 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Jul, Oct | 002 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 002 |
| Lead, dissolved [as Pb] | daily maximum | report only (ug/L) | all year | 002 |
| Lead, dissolved [as Pb] | daily maximum | report only (ug/L) | all year | 002 |
| Lead, total [as Pb] | monthly average | report only (mg/L) | Jul, Oct | 002 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Jul, Oct | 002 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 002 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 002 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | 002 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | 002 |
| Zinc, total [as Zn] | monthly average | report only (mg/L) | Jul, Oct | 002 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Jul, Oct | 002 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 002 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 002 |
| Flow, maximum during 24 hr period | daily maximum | ≤ 54600 gal/d | all year | 002 |
| Chlorine, total residual | monthly average | report only (mg/L) | Jul, Oct | 002 |
| Chlorine, total residual | daily maximum | report only (mg/L) | Jul, Oct | 002 |
| Chlorine, total residual | daily maximum | report only (ug/L) | all year | 002 |
| Chlorine, total residual | daily maximum | report only (ug/L) | all year | 002 |
| Specific Conductance | daily maximum | report only (umho/sec) | all year | 002 |
| Specific Conductance | daily maximum | report only (umho/sec) | all year | 002 |
| Date of Sample Collection | daily maximum | report only (date) | all year | 002 |
| Date of Sample Collection | daily maximum | report only (date) | all year | 002 |
| pH, maximum | instantaneous maximum | ≤ 8.5 SU | all year | 002 |
| pH, minimum | instantaneous minimum | ≥ 6.8 SU | all year | 002 |
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | minimum | ≥ 100 % | all year | 002 |
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | daily maximum | report only (%) | all year | 002 |
| LC50 Static 48Hr Acute Menidia | minimum | ≥ 100 % | all year | 002 |
Cited limits by parameter: Connecticut's rules and the federal ones.
Same industry: the 3 Educational Services permits in Connecticut.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/CT0028631 · MCP: https://passage-data.com/mcp