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Waupaca Foundry Plant 4 Marinette

Gray And Ductile Iron Foundries, Marinette, Wisconsin. NPDES permit WI0043699 expired Sep 30, 2023; its limits still apply. Last 12 months: no values over a limit, 8 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form A monthly (4 values)
Last report on file: June 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (6)

Parameter	Statistic	Limit	Months	Outfall
Solids, total suspended	monthly average	≤ 20 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 20 mg/L	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	004
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	004

How strict are these limits?

Solids, total suspended, daily maximum 20 mg/L — stricter than 82% of 34 other minor industrial and other permits in Wisconsin; 15% have the same limit
Solids, total suspended, monthly average 20 mg/L — stricter than 39% of 53 other minor industrial and other permits in Wisconsin; 47% have the same limit

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/WI0043699 · MCP: https://passage-data.com/mcp