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Firstlight CT Housatonic LLC

Electric Services, Southbury, Connecticut. NPDES permit CT0030228 expired Aug 31, 2015; its limits still apply. Last 12 months: over a limit once (last January 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 31 days after each period: outfall 101 form 1 monthly (8 values), outfall 104 form 1 monthly (10 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimit
January 2026pH, instantaneous minimum5.68 SU≥ 6 SU

Limits in force (40)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitinstantaneous maximumreport only (deg F)Jan, Apr, Jul, Oct101
Flow ratemonthly averagereport only (gal/d)all year101
pHinstantaneous minimum≥ 6 SUJan, Apr, Jul, Oct101
pHinstantaneous maximum≤ 9 SUJan, Apr, Jul, Oct101
Copper, total [as Cu]instantaneous maximumreport only (mg/L)Jan, Apr, Jul, Oct101
Lead, total [as Pb]instantaneous maximumreport only (mg/L)Jan, Apr, Jul, Oct101
Zinc, total [as Zn]instantaneous maximumreport only (mg/L)Jan, Apr, Jul, Oct101
Flow, maximum during 24 hr perioddaily maximum≤ 2016000 gal/dall year101
Flowdaily maximum≤ 2016000 gal/dall year101
Flowdaily maximum≤ 2016000 gal/dJan, Apr, Jul, Oct101
Duration of dischargemonthly averagereport only (hr/d)all year101
Duration of dischargedaily maximumreport only (hr/d)all year101
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiainstantaneous minimumreport only (%)Jul101
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiainstantaneous minimumreport only (%)Jan, Feb, Mar, Apr, May, Jun, Aug, Sep, Oct, Nov, Dec101
Noel Statre 7Day Chronic Pimephalesinstantaneous minimumreport only (%)Jul101
Noel Statre 7Day Chronic Pimephalesinstantaneous minimumreport only (%)Jan, Feb, Mar, Apr, May, Jun, Aug, Sep, Oct, Nov, Dec101
NOAEL Static 48Hr Acute D. pulexinstantaneous minimum≥ 90 %Jan, Jul101
NOAEL Static 48Hr Acute D. pulexinstantaneous minimumreport only (%)Feb, Mar, Apr, May, Jun, Aug, Sep, Oct, Nov, Dec101
NOAEL Static 48Hr Acute Pimephales promelasinstantaneous minimum≥ 90 %Jan, Jul101
NOAEL Static 48Hr Acute Pimephales promelasinstantaneous minimumreport only (%)Feb, Mar, Apr, May, Jun, Aug, Sep, Oct, Nov, Dec101
Temperature, water deg. fahrenheitinstantaneous maximumreport only (deg F)Jan, Apr, Jul, Oct104
Flow ratemonthly averagereport only (gal/d)all year104
pHinstantaneous minimum≥ 6 SUJan, Apr, Jul, Oct104
pHinstantaneous maximum≤ 9 SUJan, Apr, Jul, Oct104
Oil & Greaseinstantaneous maximum≤ 10 mg/Lall year104
Copper, total [as Cu]instantaneous maximumreport only (mg/L)Jan, Apr, Jul, Oct104
Lead, total [as Pb]instantaneous maximumreport only (mg/L)Jan, Apr, Jul, Oct104
Zinc, total [as Zn]instantaneous maximumreport only (mg/L)Jan, Apr, Jul, Oct104
Flow, maximum during 24 hr perioddaily maximum≤ 4500000 gal/dall year104
Flowdaily maximum≤ 4500000 gal/dall year104
Duration of dischargemonthly averagereport only (hr/d)all year104
Duration of dischargedaily maximumreport only (hr/d)all year104
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiainstantaneous minimumreport only (%)Jul104
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiainstantaneous minimumreport only (%)Jan, Feb, Mar, Apr, May, Jun, Aug, Sep, Oct, Nov, Dec104
Noel Statre 7Day Chronic Pimephalesinstantaneous minimumreport only (%)Jul104
Noel Statre 7Day Chronic Pimephalesinstantaneous minimumreport only (%)Jan, Feb, Mar, Apr, May, Jun, Aug, Sep, Oct, Nov, Dec104
NOAEL Static 48Hr Acute D. pulexinstantaneous minimum≥ 90 %Jan, Jul104
NOAEL Static 48Hr Acute D. pulexinstantaneous minimumreport only (%)Feb, Mar, Apr, May, Jun, Aug, Sep, Oct, Nov, Dec104
NOAEL Static 48Hr Acute Pimephales promelasinstantaneous minimum≥ 90 %Jan, Jul104
NOAEL Static 48Hr Acute Pimephales promelasinstantaneous minimumreport only (%)Feb, Mar, Apr, May, Jun, Aug, Sep, Oct, Nov, Dec104

How strict are these limits?

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/CT0030228 · MCP: https://passage-data.com/mcp