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City of Birmingham

Sewage treatment plant, Birmingham, Iowa. NPDES permit IA0023426 expired Jul 27, 2002; its limits still apply. Last 12 months: over a limit 5 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (14 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
3 values over a limit, 4 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
April 2026Flow, in conduit or thru treatment plant, daily maximum.434≤ .377 MGD15%
June 2026Flow, in conduit or thru treatment plant, 30-day average.2208≤ .19 MGD16%
June 2026Flow, in conduit or thru treatment plant, daily maximum.617≤ .377 MGD64%
July 2026Nitrogen, ammonia total [as N], 30-day average13≤ 8.7 mg/L49%
August 2026Flow, in conduit or thru treatment plant, daily maximum.475≤ .377 MGD26%

Limits in force (22)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]30-day averagereport only (mg/L)all year
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspended30-day average≤ 80 mg/Lall year
Solids, total suspended7-day average≤ 120 mg/Lall year
Solids, total suspended30-day average≤ 127 lb/dall year
Solids, total suspended7-day average≤ 190 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 8.7 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 8.7 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 13 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 13 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 14 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 14 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 21 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 21 lb/dAug
Flow, in conduit or thru treatment plant30-day average≤ .19 MGDall year
Flow, in conduit or thru treatment plantdaily maximum≤ .377 MGDall year
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]30-day average≤ 40 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 63 lb/dall year

How strict are these limits?

Cited limits by parameter: Iowa'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/IA0023426 · MCP: https://passage-data.com/mcp