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Industrial or other facility, Griswold, Connecticut. NPDES permit CT0030635 expired May 31, 2019; its limits still apply. Last 12 months: no values over a limit, 4 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen demand, chem. [low level] [COD] | instantaneous maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | instantaneous maximum | report only (mg/L) | all year | 001 |
| Oil & Grease | instantaneous maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | instantaneous maximum | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | instantaneous maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | instantaneous maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | instantaneous maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | instantaneous maximum | report only (mg/L) | all year | 001 |
| Aluminum, total [as Al] | instantaneous maximum | report only (mg/L) | all year | 001 |
| pH, maximum | instantaneous maximum | ≤ 9 SU | all year | 001 |
| pH, minimum | instantaneous minimum | ≥ 6 SU | all year | 001 |
| NOAEL Static 48Hr Acute D. pulex | minimum | ≥ 90 % | all year | 001 |
| NOAEL Static 48Hr Acute Pimephales promelas | minimum | ≥ 90 % | all year | 001 |
| Oxygen demand, chem. [low level] [COD] | instantaneous maximum | report only (mg/L) | all year | 002 |
| Solids, total suspended | instantaneous maximum | report only (mg/L) | all year | 002 |
| Oil & Grease | instantaneous maximum | report only (mg/L) | all year | 002 |
| Nitrogen, nitrate total [as N] | instantaneous maximum | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | instantaneous maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | instantaneous maximum | report only (mg/L) | all year | 002 |
| Copper, total [as Cu] | instantaneous maximum | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | instantaneous maximum | report only (mg/L) | all year | 002 |
| Aluminum, total [as Al] | instantaneous maximum | report only (mg/L) | all year | 002 |
| pH, maximum | instantaneous maximum | ≤ 9 SU | all year | 002 |
| pH, minimum | instantaneous minimum | ≥ 6 SU | all year | 002 |
| NOAEL Static 48Hr Acute D. pulex | minimum | ≥ 90 % | all year | 002 |
| NOAEL Static 48Hr Acute Pimephales promelas | minimum | ≥ 90 % | all year | 002 |
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/CT0030635 · MCP: https://passage-data.com/mcp