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City of Denver

Sewage treatment plant, Denver, Iowa. NPDES permit IA0044156, in force until Apr 30, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (32 values)
Renewal application due
Nov 1, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (120)

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≤ 163 lb/dall year
Solids, total suspended7-day average≤ 244 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≤ 83.4 lb/dall year
Nitrogen, total [as N]daily maximum≤ 136.5 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LDec
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≤ 2.1 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 1.5 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 4.5 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 2.8 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 1.8 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 5.2 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 5.8 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 16 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 11.1 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 8.6 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 15.7 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 10.3 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 8.9 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 13.6 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 14.9 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 14.2 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 21.4 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 7.3 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 5.3 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 11.4 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 8 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 24.6 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 5.9 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 15.2 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 18.5 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 9.9 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 28 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 31.5 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 86.5 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 51 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 39.6 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 85.1 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 46.6 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 79.6 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 40.7 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 62.9 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 79.6 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 73.7 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 82.3 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 77 lb/dFeb
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
E. coligeometric mean≤ 126 #/100mLall year
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/LJan
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/LDec
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/LFeb
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/LJun
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/LApr
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/LJul
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/LNov
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/LMay
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/LSep
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/LMar
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/LAug
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/LOct
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/LJan
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/LDec
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/LFeb
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 30 mg/LJun
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/LApr
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 30 mg/LJul
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/LNov
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 30 mg/LMay
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 30 mg/LSep
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/LMar
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 30 mg/LAug
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 30 mg/LOct
BOD, carbonaceous [5 day, 20 C]30-day average≤ 136 lb/dJan
BOD, carbonaceous [5 day, 20 C]30-day average≤ 136 lb/dDec
BOD, carbonaceous [5 day, 20 C]30-day average≤ 136 lb/dFeb
BOD, carbonaceous [5 day, 20 C]30-day average≤ 135.5 lb/dJun
BOD, carbonaceous [5 day, 20 C]30-day average≤ 136 lb/dApr
BOD, carbonaceous [5 day, 20 C]30-day average≤ 135.5 lb/dJul
BOD, carbonaceous [5 day, 20 C]30-day average≤ 136 lb/dNov
BOD, carbonaceous [5 day, 20 C]30-day average≤ 135.5 lb/dMay
BOD, carbonaceous [5 day, 20 C]30-day average≤ 135.5 lb/dSep
BOD, carbonaceous [5 day, 20 C]30-day average≤ 136 lb/dMar
BOD, carbonaceous [5 day, 20 C]30-day average≤ 135.5 lb/dAug
BOD, carbonaceous [5 day, 20 C]30-day average≤ 135.5 lb/dOct
BOD, carbonaceous [5 day, 20 C]7-day average≤ 217 lb/dJan
BOD, carbonaceous [5 day, 20 C]7-day average≤ 217 lb/dDec
BOD, carbonaceous [5 day, 20 C]7-day average≤ 217 lb/dFeb
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 162.6 lb/dJun
BOD, carbonaceous [5 day, 20 C]7-day average≤ 217 lb/dApr
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 162.6 lb/dJul
BOD, carbonaceous [5 day, 20 C]7-day average≤ 217 lb/dNov
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 162.6 lb/dMay
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 162.6 lb/dSep
BOD, carbonaceous [5 day, 20 C]7-day average≤ 217 lb/dMar
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 162.6 lb/dAug
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 162.6 lb/dOct

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/IA0044156 · MCP: https://passage-data.com/mcp