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City of Mingo

Sewage treatment plant, Mingo, Iowa. NPDES permit IA0022276, in force until Mar 31, 2031. Last 12 months: over a limit 2 times (last August 2026), 6 required values missing. 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: 1 value over a limit, 0 required values missing, 0 of 12 reports late

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

Period ending	Parameter	Reported	Limit	Over by
August 2026	Solids, total suspended, 30-day average	193	≤ 80 mg/L	141%
August 2026	Solids, total suspended, 7-day average	223	≤ 120 mg/L	86%

Limits in force (6)

Parameter	Statistic	Limit	Months
pH	daily minimum	≥ 6.3 SU	all year
pH	daily maximum	≤ 9 SU	all year
Solids, total suspended	30-day average	≤ 80 mg/L	all year
Solids, total suspended	7-day average	≤ 120 mg/L	all year
BOD, carbonaceous [5 day, 20 C]	30-day average	≤ 25 mg/L	all year
BOD, carbonaceous [5 day, 20 C]	7-day average	≤ 40 mg/L	all year

How strict are these limits?

pH, daily minimum at least 6.3 SU — stricter than 50% of 699 other minor POTWs in Iowa; 2% have the same limit

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/IA0022276 · MCP: https://passage-data.com/mcp