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City of Shelby

Sewage treatment plant, Shelby, Iowa. NPDES permit IA0036579 expired Aug 31, 2020; its limits still apply. Last 12 months: over a limit 5 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

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

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

Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], 30-day average25.6≤ 25 mg/L2%
October 2025Solids, total suspended, 30-day average81≤ 80 mg/L1%
June 2026BOD, carbonaceous [5 day, 20 C], 30-day average29≤ 25 mg/L16%
June 2026Solids, total suspended, 30-day average108.5≤ 80 mg/L36%
June 2026Solids, total suspended, 7-day average139≤ 120 mg/L16%

Limits in force (6)

ParameterStatisticLimitMonths
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
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

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0036579 · MCP: https://passage-data.com/mcp