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City of Gladbrook

Sewage treatment plant, Gladbrook, Iowa. NPDES permit IA0025330, in force until Aug 31, 2028. Last 12 months: over a limit 10 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (27 values)
Renewal application due
Mar 4, 2028 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
11 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
November 2025pH, daily maximum9.4≤ 9 SU—
December 2025BOD, carbonaceous [5 day, 20 C], 30-day average26.75≤ 25 mg/L7%
March 2026E. coli, geometric mean330≤ 126 #/100mL162%
April 2026BOD, carbonaceous [5 day, 20 C], 30-day average28.2≤ 25 mg/L13%
April 2026BOD, carbonaceous [5 day, 20 C], 30-day average73.71559≤ 58 lb/d27%
April 2026BOD, carbonaceous [5 day, 20 C], 7-day average149.2693≤ 93 lb/d61%
May 2026BOD, carbonaceous [5 day, 20 C], 30-day average25.5≤ 25 mg/L2%
May 2026pH, daily maximum9.1≤ 9 SU—
June 2026BOD, carbonaceous [5 day, 20 C], 30-day average27.5≤ 25 mg/L10%
August 2026Solids, total suspended, 7-day average319.1634≤ 280 lb/d14%

Limits in force (71)

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≥ 6.1 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≤ 187 lb/dall year
Solids, total suspended7-day average≤ 280 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, total [as N]30-day average≤ 52.1 lb/dall year
Nitrogen, total [as N]daily maximum≤ 85.2 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 10.8 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 18.1 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 12.4 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 24.5 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 6.8 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 7.5 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 11.1 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 25.6 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 12.4 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 13.6 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 7.1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 9.3 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 14.4 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 18.1 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 12.4 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 36.9 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 14.6 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 12.4 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 12.4 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 25.6 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 15.1 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 13.6 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 15.1 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 15.1 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 25.3 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 42.3 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 29 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 57.3 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 15.8 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 17.6 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 26 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 59.8 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 28.9 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 31.7 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 16.7 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 21.8 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 33.6 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 42.3 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 29 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 86.1 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 34 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 29 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 29 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 59.8 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 35.2 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 31.7 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 35.2 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 35.2 lb/dJun
E. coligeometric mean≤ 126 #/100mLMar–Nov
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≤ 58 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 93 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/IA0025330 · MCP: https://passage-data.com/mcp