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City of Lisbon

Sewage treatment plant, Lisbon, Iowa. NPDES permit IA0025909, in force until Jun 30, 2030. Last 12 months: over a limit 6 times (last June 2026), 4 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (34 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
9 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
January 2026Nitrogen, ammonia total [as N], 30-day average4.63875≤ 3.4 mg/L36%
January 2026Nitrogen, ammonia total [as N], daily maximum22≤ 15 mg/L47%
February 2026Nitrogen, ammonia total [as N], daily maximum15≤ 14.2 mg/L6%
June 2026Solids, total suspended, 30-day average32.8≤ 30 mg/L9%
June 2026Solids, total suspended, 7-day average150≤ 45 mg/L233%
June 2026Solids, total suspended, 7-day average220.176≤ 150 lb/d47%

Limits in force (78)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year
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≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 100 lb/dall year
Solids, total suspended7-day average≤ 150 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≤ 2.5 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 2.3 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 1.3 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 1.5 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 1.7 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 16 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 17.2 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 16.5 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 14.2 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 14.4 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 16.2 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 15 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 15.7 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 15.7 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 8.3 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 3.4 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 7.7 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 3.5 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 13.2 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 11.4 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 4.4 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 3.2 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 11.4 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 5.1 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 5.2 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 5.8 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 53.2 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 54.7 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 49 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 55 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 47.4 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 49 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 48.2 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 54.1 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 50.7 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 52.4 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 52.4 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 50.7 lb/dMay
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
Chloride [as Cl]30-day average≤ 389 mg/Lall year
Chloride [as Cl]daily maximum≤ 629 mg/Lall year
Chloride [as Cl]30-day average≤ 1297 lb/dall year
Chloride [as Cl]daily maximum≤ 2098 lb/dall year
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≤ 83 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 133 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/IA0025909 · MCP: https://passage-data.com/mcp