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City of Lake Park

Sewage treatment plant, Lake Park, Iowa. NPDES permit IA0036919, in force until Mar 31, 2028. Last 12 months: over a limit 7 times (last April 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (26 values)
Renewal application due
Oct 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 1 of 12 reports late

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

Period endingParameterReportedLimitOver by
January 2026Nitrogen, ammonia total [as N], 30-day average7.655≤ 5.3 mg/L44%
January 2026Nitrogen, ammonia total [as N], daily maximum16≤ 15.4 mg/L4%
February 2026Nitrogen, ammonia total [as N], 30-day average13.5≤ 6.1 mg/L121%
February 2026Nitrogen, ammonia total [as N], daily maximum16≤ 14.5 mg/L10%
March 2026Nitrogen, ammonia total [as N], 30-day average14.75≤ 5.3 mg/L178%
March 2026Nitrogen, ammonia total [as N], daily maximum17≤ 14.9 mg/L14%
April 2026Nitrogen, ammonia total [as N], 30-day average7.776≤ 2.4 mg/L224%

Limits in force (70)

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≤ 183 lb/dall year
Solids, total suspended7-day average≤ 274 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≤ 2.7 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 1.5 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 2.4 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 6.1 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 3.9 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 2 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 5.3 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 3.6 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 2.4 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 5.3 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 15.4 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 16.4 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 15.9 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 16.7 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 14.5 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 16.2 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 14.6 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 17.8 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 15.4 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 14.9 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 15.9 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 14.9 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 11.5 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 6.3 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 10.1 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 7 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 26.1 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 16.4 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 8.7 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 6.6 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 22.6 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 15.4 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 10.3 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 22.5 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 92.7 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 52.4 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 95.8 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 67.6 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 86.7 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 97.4 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 74.9 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 54.8 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 92.7 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 89.6 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 95.8 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 89.6 lb/dMar
E. coligeometric mean≤ 630 #/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≤ 152 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 244 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/IA0036919 · MCP: https://passage-data.com/mcp