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City of Laurel

Sewage treatment plant, Laurel, Iowa. NPDES permit IA0072214, in force until May 31, 2030. Last 12 months: over a limit 36 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (26 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
11 values over a limit, 0 required values missing, 0 of 12 reports late

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

All 36 values over a limit
Period endingParameterReportedLimitOver by
December 2025Nitrogen, ammonia total [as N], 30-day average1.745043≤ 1.5 lb/d16%
December 2025Nitrogen, ammonia total [as N], 30-day average9.8≤ 2.5 mg/L292%
December 2025Nitrogen, ammonia total [as N], daily maximum13.4≤ 3.9 mg/L244%
December 2025Nitrogen, ammonia total [as N], daily maximum2.549154≤ 2.4 lb/d6%
January 2026Nitrogen, ammonia total [as N], 30-day average13.6≤ 3.4 mg/L300%
January 2026Nitrogen, ammonia total [as N], 30-day average2.708639≤ 2.1 lb/d29%
February 2026Nitrogen, ammonia total [as N], 30-day average21.675≤ 4 mg/L442%
February 2026Nitrogen, ammonia total [as N], 30-day average3.638824≤ 2.4 lb/d52%
February 2026Nitrogen, ammonia total [as N], daily maximum26.1≤ 8.5 mg/L207%
March 2026Nitrogen, ammonia total [as N], 30-day average26.5≤ 3.4 mg/L679%
March 2026Nitrogen, ammonia total [as N], 30-day average5.244987≤ 2.1 lb/d150%
March 2026Nitrogen, ammonia total [as N], daily maximum28.5≤ 3.9 mg/L631%
March 2026Nitrogen, ammonia total [as N], daily maximum6.119566≤ 2.4 lb/d155%
April 2026Nitrogen, ammonia total [as N], 30-day average16.76≤ 1.6 mg/L948%
April 2026Nitrogen, ammonia total [as N], 30-day average8.512238≤ .9 lb/d846%
April 2026Nitrogen, ammonia total [as N], daily maximum21.09944≤ 2.9 lb/d628%
April 2026Nitrogen, ammonia total [as N], daily maximum28.5≤ 4.8 mg/L494%
May 2026Nitrogen, ammonia total [as N], 30-day average1.193532≤ 1.1 lb/d9%
May 2026Nitrogen, ammonia total [as N], 30-day average4.925≤ 1.8 mg/L174%
May 2026Nitrogen, ammonia total [as N], daily maximum2.542298≤ 2 lb/d27%
May 2026Nitrogen, ammonia total [as N], daily maximum8.8≤ 3.3 mg/L167%
June 2026Nitrogen, ammonia total [as N], 30-day average1.32707≤ .8 lb/d66%
June 2026Nitrogen, ammonia total [as N], 30-day average4.45≤ 1.4 mg/L218%
June 2026Nitrogen, ammonia total [as N], daily maximum2.565348≤ 2 lb/d28%
June 2026Nitrogen, ammonia total [as N], daily maximum7.4≤ 3.3 mg/L124%
July 2026E. coli, geometric mean990.5924≤ 126 #/100mL686%
July 2026Nitrogen, ammonia total [as N], 30-day average.781394≤ .6 lb/d30%
July 2026Nitrogen, ammonia total [as N], 30-day average3.16≤ 1 mg/L216%
July 2026Nitrogen, ammonia total [as N], daily maximum3.7≤ 3.3 mg/L12%
August 2026Nitrogen, ammonia total [as N], 30-day average2.2≤ 1 mg/L120%
August 2026Nitrogen, ammonia total [as N], daily maximum3.7≤ 2.8 mg/L32%
August 2026pH, daily maximum9.97≤ 9 SU—
September 2026E. coli, geometric mean134.7235≤ 126 #/100mL7%
September 2026Nitrogen, ammonia total [as N], 30-day average.718904≤ .7 lb/d3%
September 2026Nitrogen, ammonia total [as N], 30-day average3.35≤ 1.1 mg/L205%
September 2026Nitrogen, ammonia total [as N], daily maximum5.9≤ 2.7 mg/L119%

Limits in force (70)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 1 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 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≤ 80 mg/Lall year
Solids, total suspended7-day average≤ 120 mg/Lall year
Solids, total suspended30-day average≤ 49 lb/dall year
Solids, total suspended7-day average≤ 73 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≤ 1.4 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LMar
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≤ 1.6 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 2.5 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 1.8 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 2.4 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 3.3 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 2.8 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 20 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 4.8 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 3.3 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 8.5 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 3.3 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ .8 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 2.1 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ .6 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 2.1 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ .9 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ .6 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 1.5 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ .7 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 1 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 2.4 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 1.1 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 1.4 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 2 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 2.4 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 1.7 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 12.2 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 2.9 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 2 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 2.4 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 1.7 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 1.6 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 5.2 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 2 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 1.6 lb/dNov
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≤ 15 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 24 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/IA0072214 · MCP: https://passage-data.com/mcp