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City of Cherokee

Sewage treatment plant, major discharger, Cherokee, Iowa. NPDES permit IA0059005 expired Jan 31, 2026; its limits still apply. Last 12 months: over a limit 47 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (47 values), outfall 002 form A monthly (47 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
25 values over a limit, 0 required values missing, 4 of 24 reports late

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

All 47 values over a limit
Period endingOutfallParameterReportedLimitOver by
October 2025001E. coli, geometric mean169.2925≤ 126 #/100mL34%
January 2026001BOD, carbonaceous [5 day, 20 C], 30-day average34.9≤ 25 mg/L40%
January 2026001BOD, carbonaceous [5 day, 20 C], 7-day average58.1≤ 40 mg/L45%
February 2026001BOD, carbonaceous [5 day, 20 C], 30-day average678.6365≤ 261 lb/d160%
February 2026001BOD, carbonaceous [5 day, 20 C], 30-day average77.21428≤ 25 mg/L209%
February 2026001BOD, carbonaceous [5 day, 20 C], 7-day average119≤ 40 mg/L198%
February 2026001BOD, carbonaceous [5 day, 20 C], 7-day average948.7644≤ 417 lb/d128%
February 2026001Nitrogen, ammonia total [as N], 30-day average16.84285≤ 16.8 mg/L0%
February 2026001Nitrogen, ammonia total [as N], 30-day average187.4897≤ 169.6 lb/d11%
February 2026001Nitrogen, ammonia total [as N], daily maximum19≤ 16.8 mg/L13%
February 2026001Nitrogen, ammonia total [as N], daily maximum433.1383≤ 169.6 lb/d155%
February 2026001Solids, total suspended, 30-day average59.8≤ 30 mg/L99%
February 2026001Solids, total suspended, 30-day average626.5829≤ 313 lb/d100%
February 2026001Solids, total suspended, 7-day average66.6≤ 45 mg/L48%
February 2026001Solids, total suspended, 7-day average901.4685≤ 469 lb/d92%
March 2026001BOD, carbonaceous [5 day, 20 C], 30-day average46.625≤ 25 mg/L87%
March 2026001BOD, carbonaceous [5 day, 20 C], 7-day average66.7≤ 40 mg/L67%
March 2026001Nitrogen, ammonia total [as N], 30-day average24.1≤ 9 mg/L168%
March 2026001Nitrogen, ammonia total [as N], daily maximum28.8≤ 16.5 mg/L75%
March 2026001Solids, total suspended, 30-day average45.125≤ 30 mg/L50%
March 2026001Solids, total suspended, 7-day average53.5≤ 45 mg/L19%
March 2026002Nitrogen, ammonia total [as N], 30-day average12.775≤ 10.4 mg/L23%
April 2026001Nitrogen, ammonia total [as N], 30-day average33.6≤ 6.4 mg/L425%
April 2026001Nitrogen, ammonia total [as N], 30-day average71.34338≤ 57.6 lb/d24%
April 2026001Nitrogen, ammonia total [as N], daily maximum37.7≤ 17.1 mg/L120%
April 2026002Nitrogen, ammonia total [as N], 30-day average10.077≤ 7.4 mg/L36%
May 2026001Nitrogen, ammonia total [as N], 30-day average117.9038≤ 48.9 lb/d141%
May 2026001Nitrogen, ammonia total [as N], 30-day average35.12222≤ 5.4 mg/L550%
May 2026001Nitrogen, ammonia total [as N], daily maximum38.7≤ 16.6 mg/L133%
May 2026001Nitrogen, ammonia total [as N], daily maximum492.2493≤ 170.1 lb/d189%
May 2026002BOD, carbonaceous [5 day, 20 C], 30-day average26.96666≤ 25 mg/L8%
May 2026002Nitrogen, ammonia total [as N], 30-day average158.9395≤ 93 lb/d71%
May 2026002Nitrogen, ammonia total [as N], 30-day average17.4≤ 6.2 mg/L181%
May 2026002Nitrogen, ammonia total [as N], daily maximum20.5≤ 16.9 mg/L21%
June 2026001Nitrogen, ammonia total [as N], 30-day average32≤ 3.6 mg/L789%
June 2026001Nitrogen, ammonia total [as N], 30-day average57.72764≤ 32.9 lb/d75%
June 2026001Nitrogen, ammonia total [as N], daily maximum40.2≤ 15.8 mg/L154%
June 2026002E. coli, geometric mean1533.776≤ 126 #/100mL1117%
June 2026002Nitrogen, ammonia total [as N], 30-day average74.4623≤ 62.3 lb/d20%
June 2026002Nitrogen, ammonia total [as N], 30-day average9.533333≤ 4.1 mg/L133%
July 2026001BOD, carbonaceous [5 day, 20 C], 7-day average42.725≤ 40 mg/L7%
July 2026001Nitrogen, ammonia total [as N], 30-day average33.52222≤ 4 mg/L738%
July 2026001Nitrogen, ammonia total [as N], daily maximum39.8≤ 19.2 mg/L107%
August 2026001Nitrogen, ammonia total [as N], 30-day average30.75≤ 3.6 mg/L754%
August 2026001Nitrogen, ammonia total [as N], daily maximum32.8≤ 17.6 mg/L86%
September 2026001Nitrogen, ammonia total [as N], 30-day average20.27777≤ 4.1 mg/L395%
September 2026001Nitrogen, ammonia total [as N], daily maximum27.4≤ 18.2 mg/L51%

Limits in force (182)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. C30-day averagereport only (lb/d)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
pH30-day averagereport only (SU)all year001
pHdaily maximumreport only (SU)all year001
Solids, total suspended30-day average≤ 30 mg/Lall year001
Solids, total suspended7-day average≤ 45 mg/Lall year001
Solids, total suspended30-day average≤ 313 lb/dall year001
Solids, total suspended7-day average≤ 469 lb/dall year001
Solids, total suspended30-day averagereport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspended30-day averagereport only (lb/d)all year001
Solids, total suspendeddaily maximumreport only (lb/d)all year001
Nitrogen, total [as N]30-day averagereport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, total [as N]30-day averagereport only (lb/d)all year001
Nitrogen, total [as N]daily maximumreport only (lb/d)all year001
Nitrogen, total [as N]30-day averagereport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, total [as N]30-day averagereport only (lb/d)all year001
Nitrogen, total [as N]daily maximumreport only (lb/d)all year001
Nitrogen, ammonia total [as N]30-day average≤ 6.4 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 4.1 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 13.2 mg/LDec001
Nitrogen, ammonia total [as N]30-day average≤ 3.6 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 11.2 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 16.8 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 17.4 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 3.6 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 5.4 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 9 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 9 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 17.1 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 18.2 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 17.6 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 15.8 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 16.1 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 16.8 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 17.4 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 17.6 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 16.6 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 17.3 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 19.2 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 16.5 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 57.6 lb/dApr001
Nitrogen, ammonia total [as N]30-day average≤ 37.4 lb/dSep001
Nitrogen, ammonia total [as N]30-day average≤ 118.4 lb/dDec001
Nitrogen, ammonia total [as N]30-day average≤ 32.9 lb/dJun001
Nitrogen, ammonia total [as N]30-day average≤ 100.5 lb/dNov001
Nitrogen, ammonia total [as N]30-day average≤ 169.6 lb/dFeb001
Nitrogen, ammonia total [as N]30-day average≤ 158.2 lb/dJan001
Nitrogen, ammonia total [as N]30-day average≤ 32.3 lb/dAug001
Nitrogen, ammonia total [as N]30-day average≤ 48.9 lb/dMay001
Nitrogen, ammonia total [as N]30-day average≤ 80.9 lb/dOct001
Nitrogen, ammonia total [as N]30-day average≤ 35.4 lb/dJul001
Nitrogen, ammonia total [as N]30-day average≤ 80.5 lb/dMar001
Nitrogen, ammonia total [as N]daily maximum≤ 175.7 lb/dApr001
Nitrogen, ammonia total [as N]daily maximum≤ 185.9 lb/dSep001
Nitrogen, ammonia total [as N]daily maximum≤ 180.2 lb/dDec001
Nitrogen, ammonia total [as N]daily maximum≤ 162 lb/dJun001
Nitrogen, ammonia total [as N]daily maximum≤ 164.7 lb/dNov001
Nitrogen, ammonia total [as N]daily maximum≤ 169.6 lb/dFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 176.6 lb/dJan001
Nitrogen, ammonia total [as N]daily maximum≤ 180.9 lb/dAug001
Nitrogen, ammonia total [as N]daily maximum≤ 170.1 lb/dMay001
Nitrogen, ammonia total [as N]daily maximum≤ 177.4 lb/dOct001
Nitrogen, ammonia total [as N]daily maximum≤ 197.1 lb/dJul001
Nitrogen, ammonia total [as N]daily maximum≤ 168.6 lb/dMar001
Nitrogen, Kjeldahl, total [as N]30-day averagereport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]30-day averagereport only (lb/d)all year001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (lb/d)all year001
Phosphorus, total [as P]30-day averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]30-day averagereport only (lb/d)all year001
Phosphorus, total [as P]daily maximumreport only (lb/d)all year001
Phosphorus, total [as P]30-day averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]30-day averagereport only (lb/d)all year001
Phosphorus, total [as P]daily maximumreport only (lb/d)all year001
E. coligeometric mean≤ 126 #/100mLMar–Nov001
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1 N=0;Y=1all year001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1 N=0;Y=1all year001
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]30-day average≤ 261 lb/dall year001
BOD, carbonaceous [5 day, 20 C]7-day average≤ 417 lb/dall year001
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year002
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year002
BOD, 5-day, 20 deg. C30-day averagereport only (lb/d)all year002
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year002
pHdaily minimum≥ 6 SUall year002
pHdaily maximum≤ 9 SUall year002
pH30-day averagereport only (SU)all year002
pHdaily maximumreport only (SU)all year002
Solids, total suspended30-day average≤ 30 mg/Lall year002
Solids, total suspended7-day average≤ 45 mg/Lall year002
Solids, total suspended30-day average≤ 545 lb/dall year002
Solids, total suspended7-day average≤ 818 lb/dall year002
Solids, total suspended30-day averagereport only (mg/L)all year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
Solids, total suspended30-day averagereport only (lb/d)all year002
Solids, total suspendeddaily maximumreport only (lb/d)all year002
Nitrogen, total [as N]30-day averagereport only (mg/L)all year002
Nitrogen, total [as N]daily maximumreport only (mg/L)all year002
Nitrogen, total [as N]30-day averagereport only (lb/d)all year002
Nitrogen, total [as N]daily maximumreport only (lb/d)all year002
Nitrogen, total [as N]30-day averagereport only (mg/L)all year002
Nitrogen, total [as N]daily maximumreport only (mg/L)all year002
Nitrogen, total [as N]30-day averagereport only (lb/d)all year002
Nitrogen, total [as N]daily maximumreport only (lb/d)all year002
Nitrogen, ammonia total [as N]30-day average≤ 6.2 mg/LMay002
Nitrogen, ammonia total [as N]30-day average≤ 10.4 mg/LMar002
Nitrogen, ammonia total [as N]30-day average≤ 10.4 mg/LOct002
Nitrogen, ammonia total [as N]30-day average≤ 4.7 mg/LJul002
Nitrogen, ammonia total [as N]30-day average≤ 17.4 mg/LFeb002
Nitrogen, ammonia total [as N]30-day average≤ 7.4 mg/LApr002
Nitrogen, ammonia total [as N]30-day average≤ 13 mg/LNov002
Nitrogen, ammonia total [as N]30-day average≤ 4.1 mg/LJun002
Nitrogen, ammonia total [as N]30-day average≤ 15.4 mg/LDec002
Nitrogen, ammonia total [as N]30-day average≤ 4.7 mg/LSep002
Nitrogen, ammonia total [as N]30-day average≤ 4.2 mg/LAug002
Nitrogen, ammonia total [as N]30-day average≤ 17.9 mg/LJan002
Nitrogen, ammonia total [as N]daily maximum≤ 16.9 mg/LMay002
Nitrogen, ammonia total [as N]daily maximum≤ 17 mg/LMar002
Nitrogen, ammonia total [as N]daily maximum≤ 17.7 mg/LOct002
Nitrogen, ammonia total [as N]daily maximum≤ 19.6 mg/LJul002
Nitrogen, ammonia total [as N]daily maximum≤ 17.4 mg/LFeb002
Nitrogen, ammonia total [as N]daily maximum≤ 17.5 mg/LApr002
Nitrogen, ammonia total [as N]daily maximum≤ 16.4 mg/LNov002
Nitrogen, ammonia total [as N]daily maximum≤ 16.1 mg/LJun002
Nitrogen, ammonia total [as N]daily maximum≤ 18 mg/LDec002
Nitrogen, ammonia total [as N]daily maximum≤ 18.6 mg/LSep002
Nitrogen, ammonia total [as N]daily maximum≤ 17.9 mg/LAug002
Nitrogen, ammonia total [as N]daily maximum≤ 17.9 mg/LJan002
Nitrogen, ammonia total [as N]30-day average≤ 93 lb/dMay002
Nitrogen, ammonia total [as N]30-day average≤ 153.6 lb/dMar002
Nitrogen, ammonia total [as N]30-day average≤ 154.3 lb/dOct002
Nitrogen, ammonia total [as N]30-day average≤ 68 lb/dJul002
Nitrogen, ammonia total [as N]30-day average≤ 301.2 lb/dFeb002
Nitrogen, ammonia total [as N]30-day average≤ 109.6 lb/dApr002
Nitrogen, ammonia total [as N]30-day average≤ 191.8 lb/dNov002
Nitrogen, ammonia total [as N]30-day average≤ 62.3 lb/dJun002
Nitrogen, ammonia total [as N]30-day average≤ 226.2 lb/dDec002
Nitrogen, ammonia total [as N]30-day average≤ 70.9 lb/dSep002
Nitrogen, ammonia total [as N]30-day average≤ 62 lb/dAug002
Nitrogen, ammonia total [as N]30-day average≤ 302.7 lb/dJan002
Nitrogen, ammonia total [as N]daily maximum≤ 299.7 lb/dMay002
Nitrogen, ammonia total [as N]daily maximum≤ 298 lb/dMar002
Nitrogen, ammonia total [as N]daily maximum≤ 312.8 lb/dOct002
Nitrogen, ammonia total [as N]daily maximum≤ 347.2 lb/dJul002
Nitrogen, ammonia total [as N]daily maximum≤ 301.2 lb/dFeb002
Nitrogen, ammonia total [as N]daily maximum≤ 309.4 lb/dApr002
Nitrogen, ammonia total [as N]daily maximum≤ 290.1 lb/dNov002
Nitrogen, ammonia total [as N]daily maximum≤ 285.4 lb/dJun002
Nitrogen, ammonia total [as N]daily maximum≤ 317.7 lb/dDec002
Nitrogen, ammonia total [as N]daily maximum≤ 327.8 lb/dSep002
Nitrogen, ammonia total [as N]daily maximum≤ 318.4 lb/dAug002
Nitrogen, ammonia total [as N]daily maximum≤ 312.7 lb/dJan002
Nitrogen, Kjeldahl, total [as N]30-day averagereport only (mg/L)all year002
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year002
Nitrogen, Kjeldahl, total [as N]30-day averagereport only (lb/d)all year002
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (lb/d)all year002
Phosphorus, total [as P]30-day averagereport only (mg/L)all year002
Phosphorus, total [as P]daily maximumreport only (mg/L)all year002
Phosphorus, total [as P]30-day averagereport only (lb/d)all year002
Phosphorus, total [as P]daily maximumreport only (lb/d)all year002
Phosphorus, total [as P]30-day averagereport only (mg/L)all year002
Phosphorus, total [as P]daily maximumreport only (mg/L)all year002
Phosphorus, total [as P]30-day averagereport only (lb/d)all year002
Phosphorus, total [as P]daily maximumreport only (lb/d)all year002
E. coligeometric mean≤ 126 #/100mLMar–Nov002
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1 N=0;Y=1all year002
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1 N=0;Y=1all year002
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/Lall year002
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year002
BOD, carbonaceous [5 day, 20 C]30-day average≤ 455 lb/dall year002
BOD, carbonaceous [5 day, 20 C]7-day average≤ 727 lb/dall year002

How strict are these limits?

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

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Your permit document is the final word. As JSON: /api/v1/permits/IA0059005 · MCP: https://passage-data.com/mcp