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U.S. Department of Interior, U.S. Geological Survey

Federal facility (Noncommercial Research Organizations), Millersburg, Michigan. NPDES permit MI0005100 expired Oct 1, 2026; its limits still apply. Last 12 months: over a limit 4 times (last June 2026), 2 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 21 days after each period: outfall 007 form A monthly (7 values), outfall 008 form A monthly (7 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimit
March 2026pH, daily minimum6.1≥ 6.5 SU
April 2026pH, daily minimum6.2≥ 6.5 SU
May 2026pH, daily minimum5.8≥ 6.5 SU
June 2026pH, daily minimum6.2≥ 6.5 SU

Limits in force (14)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6.5 SUall year007
pHdaily maximum≤ 9 SUall year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Chlorine, total residualdaily maximum≤ 38 ug/Lall year007
Chlorination durationdaily maximumreport only (min/d)all year007
Outfall observation,visual, y/n responsevaluereport only (N=0;Y=1)all year007
pHdaily minimum≥ 6.5 SUall year008
pHdaily maximum≤ 9 SUall year008
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year008
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year008
Chlorine, total residualdaily maximum≤ 38 ug/Lall year008
Chlorination durationdaily maximumreport only (min/d)all year008
Outfall observation,visual, y/n responsevaluereport only (N=0;Y=1)all year008

How strict are these limits?

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

Same industry: the 4 Engineering, Accounting, Research and Management Services permits in Michigan.

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/MI0005100 · MCP: https://passage-data.com/mcp