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Electric Services, major discharger, Hartford, Connecticut. NPDES permit CT0003875 expired Nov 16, 2009; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | instantaneous minimum | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | instantaneous minimum | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | instantaneous minimum | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | instantaneous minimum | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | instantaneous maximum | ≤ 118 deg F | all year | 001 |
| Temperature, water deg. fahrenheit | instantaneous maximum | ≤ 118 deg F | all year | 001 |
| Temperature, water deg. fahrenheit | instantaneous maximum | ≤ 118 deg F | all year | 001 |
| Temperature, water deg. fahrenheit | instantaneous maximum | ≤ 101 deg F | all year | 001 |
| Temperature, water deg. fahrenheit | instantaneous maximum | report only (deg F) | all year | 001 |
| Flow rate | monthly average | ≤ 108.02 MGD | all year | 001 |
| Flow rate | monthly average | report only (MGD) | all year | 001 |
| Flow rate | monthly average | report only (MGD) | all year | 001 |
| Flow rate | monthly average | report only (MGD) | all year | 001 |
| Flow rate | monthly average | report only (MGD) | all year | 001 |
| Flow rate | instantaneous maximum | report only (gal/min) | all year | 001 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 001 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 001 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 001 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| pH | instantaneous minimum | report only (SU) | all year | 001 |
| pH | instantaneous maximum | report only (SU) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Oil & Grease | instantaneous maximum | ≤ 20 mg/L | Jan, Apr, Jul, Oct | 001 |
| Oil & Grease | instantaneous maximum | ≤ 20 mg/L | Jan, Apr, Jul, Oct | 001 |
| Oil & Grease | instantaneous maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Oxidants, total residual | instantaneous maximum | ≤ .2 mg/L | all year | 001 |
| Oxidants, total residual | instantaneous maximum | ≤ .2 mg/L | all year | 001 |
| Oxidants, total residual | instantaneous maximum | ≤ .2 mg/L | all year | 001 |
| Oxidants, total residual | instantaneous maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Flow, maximum during 24 hr period | daily maximum | ≤ 110.42 MGD | all year | 001 |
| Flow, maximum during 24 hr period | daily maximum | ≤ 51.84 MGD | all year | 001 |
| Flow, maximum during 24 hr period | daily maximum | ≤ 53.18 MGD | all year | 001 |
| Flow, maximum during 24 hr period | daily maximum | ≤ 5.4 MGD | all year | 001 |
| Flow, maximum during 24 hr period | daily maximum | report only (MGD) | all year | 001 |
| Flow | daily maximum | ≤ 51.84 MGD | all year | 001 |
| Flow | daily maximum | ≤ 53.18 MGD | all year | 001 |
| Flow | daily maximum | ≤ 5.4 MGD | all year | 001 |
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | monthly average | report only (pass=0;fail=1) | Apr, Oct | 001 |
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | monthly average | report only (pass=0;fail=1) | Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Nov, Dec | 001 |
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | monthly average | report only (pass=0;fail=1) | Apr, Oct | 001 |
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | monthly average | report only (pass=0;fail=1) | Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Nov, Dec | 001 |
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | monthly average | report only (pass=0;fail=1) | Apr, Oct | 001 |
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | monthly average | report only (pass=0;fail=1) | Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Nov, Dec | 001 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average | report only (pass=0;fail=1) | Apr, Oct | 001 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average | report only (pass=0;fail=1) | Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Nov, Dec | 001 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average | report only (pass=0;fail=1) | Apr, Oct | 001 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average | report only (pass=0;fail=1) | Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Nov, Dec | 001 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average | report only (pass=0;fail=1) | Apr, Oct | 001 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average | report only (pass=0;fail=1) | Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Nov, Dec | 001 |
| Flow rate | monthly average | ≤ 360000 gal/d | all year | 002 |
| Solids, total suspended | instantaneous maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 002 |
| Oxidants, total residual | instantaneous maximum | report only (mg/L) | all year | 002 |
| Flow, maximum during 24 hr period | daily maximum | ≤ 691200 gal/d | all year | 002 |
| Pass/Fail Static 48Hr Acute D. Pulex | monthly average | report only (pass=0;fail=1) | Jul | 002 |
| Pass/Fail Static 48Hr Acute D. Pulex | monthly average | report only (pass=0;fail=1) | Jan, Feb, Mar, Apr, May, Jun, Aug, Sep, Oct, Nov, Dec | 002 |
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | monthly average | report only (pass=0;fail=1) | Jul | 002 |
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | monthly average | report only (pass=0;fail=1) | Jan, Feb, Mar, Apr, May, Jun, Aug, Sep, Oct, Nov, Dec | 002 |
| Flow rate | monthly average | ≤ 360000 gal/d | all year | 003 |
| Solids, total suspended | instantaneous maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 003 |
| Oxidants, total residual | instantaneous maximum | report only (mg/L) | all year | 003 |
| Flow, maximum during 24 hr period | daily maximum | ≤ 691200 gal/d | all year | 003 |
| Pass/Fail Static 48Hr Acute D. Pulex | monthly average | report only (pass=0;fail=1) | Jan | 003 |
| Pass/Fail Static 48Hr Acute D. Pulex | monthly average | report only (pass=0;fail=1) | Feb–Dec | 003 |
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | monthly average | report only (pass=0;fail=1) | Jan | 003 |
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | monthly average | report only (pass=0;fail=1) | Feb–Dec | 003 |
Cited limits by parameter: Connecticut's rules and the federal ones.
Same industry: the 12 Electric 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/CT0003875 · MCP: https://passage-data.com/mcp