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WI DNR Nevin Fish Hatchery

Fish Hatcheries And Preserves, Fitchburg, Wisconsin. NPDES permit WI0002585 expired Sep 30, 2020; its limits still apply. Last 12 months: no values over a limit, 24 required values missing, 7 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form A monthly (6 values)
Last report on file: June 2026
Oct 2024 – Sep 2025: 0 values over a limit, 6 required values missing, 8 of 12 reports late

Limits in force (6)

Parameter	Statistic	Limit	Months
pH	daily maximum	report only (SU)	all year
Phosphorus, total [as P]	monthly average	≤ .076 mg/L	all year
Phosphorus, total [as P]	monthly average	report only (lb/d)	all year
Phosphorus, total [as P]	daily maximum	report only (lb/d)	all year
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year

How strict are these limits?

Phosphorus, total [as P], monthly average .076 mg/L — stricter than 100% of 31 other minor industrial and other permits in Wisconsin

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

Same industry: the 12 Fishing, Hunting and Trapping 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/WI0002585 · MCP: https://passage-data.com/mcp