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Darling Ingredients Inc.

Prepared Feeds, Berlin, Wisconsin. NPDES permit WI0038083 expired Jun 30, 2024; its limits still apply. Last 12 months: no values over a limit, 11 required values missing, 7 of 15 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (2 values), form Q quarterly (4 values), form AN yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 14 required values missing, 8 of 17 reports late

Limits in force (12)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cannual averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cannual maximumreport only (mg/L)all year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 40 mg/Lall year
Solids, total suspendeddaily maximum≤ 40 mg/Lall year
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year
Oil and grease, hexane extr methoddaily maximum≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]annual maximumreport only (mg/L)all year
Phosphorus, total [as P]annual maximumreport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year

How strict are these limits?

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

Same industry: the 75 Food and Kindred Products permits in Wisconsin.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WI0038083 · MCP: https://passage-data.com/mcp