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City of Long Grove

Sewage treatment plant, Long Grove, Iowa. NPDES permit IA0022292, in force until Jan 31, 2029. Last 12 months: over a limit 5 times (last February 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
7 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
October 2025Chloride [as Cl], 30-day average540.6≤ 389 mg/L39%
November 2025Chloride [as Cl], 30-day average509.5≤ 389 mg/L31%
December 2025Chloride [as Cl], 30-day average446≤ 389 mg/L15%
January 2026Chloride [as Cl], 30-day average430.5≤ 389 mg/L11%
February 2026Chloride [as Cl], 30-day average453≤ 389 mg/L16%

Limits in force (74)

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≤ 58 lb/dall year
Solids, total suspended7-day average≤ 86 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≤ 2.2 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 3.6 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 4.9 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 3.3 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 2.1 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 1.5 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 1.3 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 5.7 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 1.8 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 4.5 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 15.7 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 16.2 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 16 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 15.7 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 16.5 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 14.4 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 17.6 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 14.2 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 3.8 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 1.9 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 6.1 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 8.4 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 5.7 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 3.7 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 2.6 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 2.6 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 2.1 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 9.7 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 3.5 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 8.3 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 30.2 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 31.2 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 30.7 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 29.2 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 28.2 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 30.2 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 31.7 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 27.7 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 33.8 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 27.3 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 29.2 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 28.2 lb/dMar
Chloride [as Cl]30-day average≤ 389 mg/Lall year
Chloride [as Cl]daily maximum≤ 629 mg/Lall year
Chloride [as Cl]30-day average≤ 746 lb/dall year
Chloride [as Cl]daily maximum≤ 1208 lb/dall year
E. coligeometric mean≤ 285 #/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≤ 48 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 77 lb/dall year

How strict are these limits?

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

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