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City of Hartley

Sewage treatment plant, Hartley, Iowa. NPDES permit IA0036480, in force until Nov 30, 2029. Last 12 months: over a limit 5 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (30 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 10 reports late

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

Period endingParameterReportedLimitOver by
March 2026Nitrogen, ammonia total [as N], 30-day average8.24≤ 4.3 mg/L92%
March 2026Nitrogen, ammonia total [as N], daily maximum15≤ 14.7 mg/L2%
April 2026Nitrogen, ammonia total [as N], 30-day average13.07334≤ 12.7 lb/d3%
April 2026Nitrogen, ammonia total [as N], 30-day average4.3568≤ 1.9 mg/L129%
July 2026Sulfate, total [as SO4], daily maximum2058≤ 1523 mg/L35%

Limits in force (74)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 4.8 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≤ 195 lb/dall year
Solids, total suspended7-day average≤ 293 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≤ 1 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 2 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 1.8 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 4.3 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 3.2 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 1.9 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 5 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 4.4 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 1.3 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 1.4 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 3 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 4.5 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 7.3 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 8.2 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 14.8 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 11.6 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 14.2 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 6 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 5.4 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 4.6 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 10.5 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 6.4 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 13 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 11.9 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 28.2 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 20.6 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 12.7 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 32.7 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 28.3 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 8.8 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 8.9 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 7 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 19.4 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 28 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 46.8 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 52 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 95.5 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 92.4 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 74.2 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 92.4 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 98.8 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 37.7 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 33.8 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 28.6 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 66.4 lb/dNov
Sulfate, total [as SO4]30-day average≤ 1523 mg/Lall year
Sulfate, total [as SO4]daily maximum≤ 1523 mg/Lall year
Sulfate, total [as SO4]30-day average≤ 9910 lb/dall year
Sulfate, total [as SO4]daily maximum≤ 9910 lb/dall year
E. coligeometric mean≤ 664 #/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≤ 163 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 260 lb/dall year

How strict are these limits?

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

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Your permit document is the final word. As JSON: /api/v1/permits/IA0036480 · MCP: https://passage-data.com/mcp