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Gray And Ductile Iron Foundries, Waupaca, Wisconsin. NPDES permit WI0026379 expired Mar 31, 2022; its limits still apply. Last 12 months: no values over a limit, 3 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | annual average | report only (mg/L) | all year | 001 |
| Solids, total suspended | annual maximum | report only (mg/L) | all year | 001 |
| Oil and grease, hexane extr method | annual maximum | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | quarterly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | quarterly maximum | report only (MGD) | all year | 002 |
Cited limits by parameter: Wisconsin's rules and the federal ones.
Same industry: the 3 Primary Metal Industries permits in Wisconsin.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/WI0026379 · MCP: https://passage-data.com/mcp