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City of Humeston

Sewage treatment plant, Humeston, Iowa. NPDES permit IA0043150, in force until Dec 31, 2027. Last 12 months: over a limit 14 times (last May 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (24 values)
Renewal application due
Jul 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
13 values over a limit, 0 required values missing, 0 of 12 reports late

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

All 14 values over a limit
Period endingParameterReportedLimitOver by
October 2025pH, daily maximum9.5≤ 9 SU—
November 2025pH, daily maximum12≤ 9 SU—
December 2025BOD, carbonaceous [5 day, 20 C], 30-day average34≤ 25 mg/L36%
December 2025pH, daily maximum9.2≤ 9 SU—
January 2026pH, daily maximum9.2≤ 9 SU—
February 2026BOD, carbonaceous [5 day, 20 C], 30-day average26≤ 25 mg/L4%
February 2026pH, daily maximum9.4≤ 9 SU—
March 2026BOD, carbonaceous [5 day, 20 C], 30-day average62.75≤ 25 mg/L151%
March 2026BOD, carbonaceous [5 day, 20 C], 7-day average166≤ 40 mg/L315%
March 2026BOD, carbonaceous [5 day, 20 C], 7-day average99.67968≤ 90 lb/d11%
March 2026Solids, total suspended, 30-day average97≤ 80 mg/L21%
March 2026Solids, total suspended, 7-day average136≤ 120 mg/L13%
May 2026Solids, total suspended, 30-day average92≤ 80 mg/L15%
May 2026pH, daily maximum11.8≤ 9 SU—

Limits in force (52)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. C30-day averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
pH30-day averagereport only (SU)all year
pHdaily maximumreport only (SU)all year
Solids, total suspended30-day average≤ 80 mg/Lall year
Solids, total suspended7-day average≤ 120 mg/Lall year
Solids, total suspended30-day average≤ 180 lb/dall year
Solids, total suspended7-day average≤ 270 lb/dall year
Solids, total suspended30-day averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspended30-day averagereport only (lb/d)all year
Solids, total suspendeddaily maximumreport only (lb/d)all year
Nitrogen, ammonia total [as N]30-day average≤ 30 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 13.3 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 25 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 15.5 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 20 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 18.9 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 13.2 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 11 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 41 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 13.3 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 25 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 15.5 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 20 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 18.9 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 13.2 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 11 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 43 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 30 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 57 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 33 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 39 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 43 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 30 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 25 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 93 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 30 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 57 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 35 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 45 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 43 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 30 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 25 lb/dAug
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≤ 56 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 90 lb/dall year

How strict are these limits?

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/IA0043150 · MCP: https://passage-data.com/mcp