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City of Allegan

Sewage treatment plant, major discharger, Allegan, Michigan. NPDES permit MI0020532, in force until Oct 1, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 21 days after each period: form A monthly (35 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 13 reports late

Limits in force (35)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 3 mg/Lall year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 300 lb/dall year
Solids, total suspended7-day average≤ 450 lb/dall year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly average≤ 10 lb/dall year
Phosphorus, total [as P]daily maximumreport only (lb/d)all year
Chloride [as Cl]daily maximumreport only (mg/L)all year
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year
Copper, total [as Cu]daily maximumreport only (ug/L)all year
Hexachlorobenzenedaily maximum< .01 ug/Lall 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
Perfluorooctanesulfonatedaily maximumreport only (ng/L)all year
Mercury, total [as Hg]monthly averagereport only (ng/L)all year
Mercury, total [as Hg]daily maximumreport only (ng/L)all year
Mercury, total [as Hg]monthly averagereport only (lb/d)all year
Mercury, total [as Hg]daily maximumreport only (lb/d)all year
Mercury, total [as Hg]12-month average≤ 3 ng/Lall year
Mercury, total [as Hg]12-month average≤ .00003 lb/dall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal general7-day geometric mean≤ 400 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 250 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 400 lb/dall year
BOD, carb-5 day, 20 deg C, percent removalminimum≥ 85 %all year
BOD, carb-5 day, 20 deg C, percent removaldaily minimumreport only (%)all year
Solids, suspended percent removalminimum≥ 85 %all year
Solids, suspended percent removaldaily minimumreport only (%)all year

How strict are these limits?

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

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/MI0020532 · MCP: https://passage-data.com/mcp