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City of Dike

Sewage treatment plant, Dike, Iowa. NPDES permit IA0023311, in force until Oct 31, 2030. Last 12 months: over a limit 3 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (28 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 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
July 2026Solids, total suspended, 30-day average75.56666≤ 30 mg/L152%
July 2026Solids, total suspended, 7-day average178≤ 45 mg/L296%
July 2026Solids, total suspended, 7-day average399.3358≤ 296 lb/d35%

Limits in force (72)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 4.6 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≤ 198 lb/dall year
Solids, total suspended7-day average≤ 296 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≤ 48.5 lb/dall year
Nitrogen, total [as N]daily maximum≤ 79.3 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 5.9 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 2.6 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 6.3 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 4.4 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 8.6 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 10 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 2.4 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 2.7 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 3.9 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 8.7 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 3.3 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 15.1 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 18.1 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 16.4 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 15.6 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 15.1 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 16.7 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 16.9 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 16.1 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 16.1 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 15.7 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 14.9 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 23.1 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 10 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 24.6 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 17.3 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 33.6 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 39.2 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 9.5 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 10.5 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 15.5 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 15.1 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 34 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 13 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 97.6 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 86.3 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 106 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 101 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 97.8 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 94.7 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 81 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 109.6 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 104.3 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 104.3 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 101.1 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 96 lb/dJun
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≤ 165 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 264 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/IA0023311 · MCP: https://passage-data.com/mcp