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City of Mediapolis

Sewage treatment plant, Mediapolis, Iowa. NPDES permit IA0025917, in force until Jul 31, 2030. Last 12 months: over a limit 34 times (last August 2026), 21 required values missing, 4 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (6 values), outfall 002 form A monthly (25 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
8 values over a limit, 40 required values missing, 4 of 24 reports late

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

All 34 values over a limit
Period endingParameterReportedLimitOver by
October 2025Oxygen, dissolved [DO], daily minimum4.57≥ 5 mg/L9%
December 2025Nitrogen, ammonia total [as N], 30-day average4.472≤ 2.5 mg/L79%
December 2025Nitrogen, ammonia total [as N], daily maximum10.4≤ 3.9 mg/L167%
December 2025Nitrogen, ammonia total [as N], daily maximum17.86761≤ 11 lb/d62%
January 2026Nitrogen, ammonia total [as N], 30-day average14.35918≤ 9.7 lb/d48%
January 2026Nitrogen, ammonia total [as N], 30-day average15.8≤ 3.4 mg/L365%
February 2026Nitrogen, ammonia total [as N], 30-day average13.72784≤ 11.2 lb/d23%
February 2026Nitrogen, ammonia total [as N], 30-day average19.075≤ 4 mg/L377%
February 2026Nitrogen, ammonia total [as N], daily maximum20.2≤ 8.4 mg/L140%
March 2026Nitrogen, ammonia total [as N], 30-day average19.22≤ 3.4 mg/L465%
March 2026Nitrogen, ammonia total [as N], 30-day average38.8699≤ 9.7 lb/d301%
March 2026Nitrogen, ammonia total [as N], daily maximum19.8≤ 3.9 mg/L408%
March 2026Nitrogen, ammonia total [as N], daily maximum57.53349≤ 11 lb/d423%
April 2026Nitrogen, ammonia total [as N], 30-day average11.2175≤ 1.5 mg/L648%
April 2026Nitrogen, ammonia total [as N], 30-day average11.2175≤ 1.5 mg/L648%
April 2026Nitrogen, ammonia total [as N], 30-day average51.26427≤ 4.3 lb/d1092%
April 2026Nitrogen, ammonia total [as N], 30-day average51.26427≤ 4.3 lb/d1092%
April 2026Nitrogen, ammonia total [as N], daily maximum106.4767≤ 13.4 lb/d695%
April 2026Nitrogen, ammonia total [as N], daily maximum106.4767≤ 13.4 lb/d695%
April 2026Nitrogen, ammonia total [as N], daily maximum17≤ 4.7 mg/L262%
April 2026Nitrogen, ammonia total [as N], daily maximum17≤ 4.7 mg/L262%
June 2026BOD, carbonaceous [5 day, 20 C], 7-day average143.1144≤ 113 lb/d27%
June 2026Solids, total suspended, 30-day average435.054≤ 227 lb/d92%
June 2026Solids, total suspended, 7-day average133≤ 120 mg/L11%
June 2026Solids, total suspended, 7-day average865.1916≤ 340 lb/d154%
June 2026pH, daily minimum6.44≥ 6.5 SU—
July 2026Nitrogen, ammonia total [as N], 30-day average2.1325≤ 1 mg/L113%
July 2026Nitrogen, ammonia total [as N], 30-day average2.949983≤ 2.8 lb/d5%
July 2026Oxygen, dissolved [DO], daily minimum4.95≥ 5 mg/L1%
July 2026pH, daily minimum5.02≥ 6.5 SU—
August 2026Nitrogen, ammonia total [as N], 30-day average2.1875≤ 1 mg/L119%
August 2026Nitrogen, ammonia total [as N], 30-day average8.245883≤ 2.7 lb/d205%
August 2026Nitrogen, ammonia total [as N], daily maximum23.79552≤ 7.5 lb/d217%
August 2026Nitrogen, ammonia total [as N], daily maximum3.63≤ 2.7 mg/L34%

Limits in force (75)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspended30-day average≤ 80 mg/Lall year001
Solids, total suspended7-day average≤ 120 mg/Lall 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
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year002
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≥ 6.5 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≤ 80 mg/Lall year002
Solids, total suspended7-day average≤ 120 mg/Lall year002
Solids, total suspended30-day average≤ 227 lb/dall year002
Solids, total suspended7-day average≤ 340 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, ammonia total [as N]30-day average≤ 1.7 mg/LMay002
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LJul002
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LSep002
Nitrogen, ammonia total [as N]30-day average≤ 2.5 mg/LDec002
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LAug002
Nitrogen, ammonia total [as N]30-day average≤ 2.3 mg/LNov002
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LMar002
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LFeb002
Nitrogen, ammonia total [as N]30-day average≤ 1.5 mg/LApr002
Nitrogen, ammonia total [as N]30-day average≤ 1.3 mg/LJun002
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LJan002
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LOct002
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LMay002
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LJul002
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LSep002
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LDec002
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LAug002
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LNov002
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LMar002
Nitrogen, ammonia total [as N]daily maximum≤ 8.4 mg/LFeb002
Nitrogen, ammonia total [as N]daily maximum≤ 4.7 mg/LApr002
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LJun002
Nitrogen, ammonia total [as N]daily maximum≤ 19.9 mg/LJan002
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LOct002
Nitrogen, ammonia total [as N]30-day average≤ 4.9 lb/dMay002
Nitrogen, ammonia total [as N]30-day average≤ 2.8 lb/dJul002
Nitrogen, ammonia total [as N]30-day average≤ 3 lb/dSep002
Nitrogen, ammonia total [as N]30-day average≤ 7 lb/dDec002
Nitrogen, ammonia total [as N]30-day average≤ 2.7 lb/dAug002
Nitrogen, ammonia total [as N]30-day average≤ 6.6 lb/dNov002
Nitrogen, ammonia total [as N]30-day average≤ 9.7 lb/dMar002
Nitrogen, ammonia total [as N]30-day average≤ 11.2 lb/dFeb002
Nitrogen, ammonia total [as N]30-day average≤ 4.3 lb/dApr002
Nitrogen, ammonia total [as N]30-day average≤ 3.7 lb/dJun002
Nitrogen, ammonia total [as N]30-day average≤ 9.7 lb/dJan002
Nitrogen, ammonia total [as N]30-day average≤ 4.4 lb/dOct002
Nitrogen, ammonia total [as N]daily maximum≤ 9.1 lb/dMay002
Nitrogen, ammonia total [as N]daily maximum≤ 9.1 lb/dJul002
Nitrogen, ammonia total [as N]daily maximum≤ 7.5 lb/dSep002
Nitrogen, ammonia total [as N]daily maximum≤ 11 lb/dDec002
Nitrogen, ammonia total [as N]daily maximum≤ 7.5 lb/dAug002
Nitrogen, ammonia total [as N]daily maximum≤ 7.5 lb/dNov002
Nitrogen, ammonia total [as N]daily maximum≤ 11 lb/dMar002
Nitrogen, ammonia total [as N]daily maximum≤ 23.8 lb/dFeb002
Nitrogen, ammonia total [as N]daily maximum≤ 13.4 lb/dApr002
Nitrogen, ammonia total [as N]daily maximum≤ 9.1 lb/dJun002
Nitrogen, ammonia total [as N]daily maximum≤ 56.4 lb/dJan002
Nitrogen, ammonia total [as N]daily maximum≤ 7.5 lb/dOct002
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≤ 71 lb/dall year002
BOD, carbonaceous [5 day, 20 C]7-day average≤ 113 lb/dall year002

How strict are these limits?

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

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