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Firstlight CT Hydro LLC

Industrial or other facility, Colebrook, Connecticut. NPDES permit CT0030812, in force until Aug 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 31 days after each period: outfall 101 form 1 monthly (4 values), outfall 102 form 1 monthly (4 values)
Last report on file: March 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 4 reports late

Limits in force (8)

Parameter	Statistic	Limit	Months	Outfall
pH	instantaneous minimum	≥ 6.5 SU	Mar, Sep	101
pH	instantaneous maximum	≤ 8 SU	Mar, Sep	101
Oil & Grease	instantaneous maximum	report only (mg/L)	Mar, Sep	101
Flow, maximum during 24 hr period	daily maximum	≤ 3000 gal/d	Mar, Sep	101
pH	instantaneous minimum	≥ 6.5 SU	Mar, Sep	102
pH	instantaneous maximum	≤ 8 SU	Mar, Sep	102
Oil & Grease	instantaneous maximum	report only (mg/L)	Mar, Sep	102
Flow, maximum during 24 hr period	daily maximum	≤ 3000 gal/d	Mar, Sep	102

How strict are these limits?

pH, instantaneous maximum 8 SU — stricter than 83% of 24 other minor industrial and other permits in Connecticut; 17% have the same limit
pH, instantaneous minimum at least 6.5 SU — stricter than 79% of 24 other minor industrial and other permits in Connecticut; 13% have the same limit

Cited limits by parameter: Connecticut's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/CT0030812 · MCP: https://passage-data.com/mcp