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City of Keokuk

Sewage treatment plant, major discharger, Keokuk, Iowa. NPDES permit IA0042609, in force until Mar 31, 2030. Last 12 months: over a limit 18 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (35 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
14 values over a limit, 3 required values missing, 0 of 12 reports late

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

All 18 values over a limit
Period endingParameterReportedLimitOver by
January 2026BOD, carbonaceous [5 day, 20 C], 30-day average33.19411≤ 25 mg/L33%
January 2026BOD, carbonaceous [5 day, 20 C], 7-day average50.725≤ 40 mg/L27%
January 2026Solids, total suspended, 30-day average107.247≤ 30 mg/L257%
January 2026Solids, total suspended, 7-day average273.5≤ 45 mg/L508%
February 2026BOD, carbonaceous [5 day, 20 C], 30-day average36.53125≤ 25 mg/L46%
February 2026BOD, carbonaceous [5 day, 20 C], 7-day average50.6≤ 40 mg/L27%
February 2026Solids, total suspended, 30-day average106.2≤ 30 mg/L254%
February 2026Solids, total suspended, 7-day average122.25≤ 45 mg/L172%
March 2026BOD, carbonaceous [5 day, 20 C], 7-day average45.825≤ 40 mg/L15%
March 2026Solids, total suspended, 30-day average71.575≤ 30 mg/L139%
March 2026Solids, total suspended, 7-day average181.75≤ 45 mg/L304%
March 2026Solids, total suspended, 7-day average2719.498≤ 1877 lb/d45%
April 2026Solids, total suspended, 30-day average34.22777≤ 30 mg/L14%
April 2026Solids, total suspended, 7-day average90.275≤ 45 mg/L101%
August 2026BOD, carbonaceous [5 day, 20 C], 30-day average179.1529≤ 25 mg/L617%
August 2026BOD, carbonaceous [5 day, 20 C], 7-day average3699.83≤ 1668 lb/d122%
August 2026BOD, carbonaceous [5 day, 20 C], 7-day average671.25≤ 40 mg/L1578%
August 2026pH, daily minimum4.6≥ 6 SU—

Limits in force (35)

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 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≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 1251 lb/dall year
Solids, total suspended7-day average≤ 1877 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 averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]30-day averagereport only (lb/d)all year
Nitrogen, total [as N]daily maximumreport only (lb/d)all year
Nitrogen, Kjeldahl, total [as N]30-day averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]30-day averagereport only (lb/d)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (lb/d)all year
Phosphorus, total [as P]30-day averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]30-day averagereport only (lb/d)all year
Phosphorus, total [as P]daily maximumreport only (lb/d)all year
E. coligeometric mean≤ 126 #/100mLMar–Nov
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1 N=0;Y=1all year
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1 N=0;Y=1all 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≤ 1043 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 1668 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/IA0042609 · MCP: https://passage-data.com/mcp