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City of Fairfax

Sewage treatment plant, Fairfax, Iowa. NPDES permit IA0030694, in force until Apr 30, 2030. 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 (34 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 4 required values missing, 1 of 11 reports late

Limits in force (78)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 4 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≤ 150 lb/dall year
Solids, total suspended7-day average≤ 225 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≤ 2.3 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 5.3 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 2.3 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 3.9 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 10.6 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 2.6 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 6.8 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 2.1 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 12 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 7.9 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 9.2 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 9.7 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 15.9 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 12.7 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 15.9 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 15.4 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 15.5 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 12.3 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 14.9 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 9.8 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 14.6 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 16.2 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 14.9 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 13 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 20.3 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 13.3 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 19.8 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 19.5 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 44.6 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 13.7 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 30.3 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 12.4 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 51.3 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 32.3 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 43.8 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 40 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 79.3 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 51.5 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 79.2 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 76.7 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 77 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 47.5 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 74.1 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 40.5 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 72.2 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 80.6 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 74.4 lb/dMar
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≤ 535 mg/Lall year
Chloride [as Cl]daily maximum≤ 644 mg/Lall year
Chloride [as Cl]30-day average≤ 2432 lb/dall year
Chloride [as Cl]daily maximum≤ 3196 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≤ 125 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 200 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/IA0030694 · MCP: https://passage-data.com/mcp