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City of Huxley

Sewage treatment plant, Huxley, Iowa. NPDES permit IA0083518, in force until Feb 28, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (38 values)
Renewal application due
Sep 1, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (82)

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≤ 212 lb/dall year
Solids, total suspended7-day average≤ 319 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 averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]30-day averagereport only (lb/d)all year
Nitrogen, total [as N]daily maximumreport only (lb/d)all year
Nitrogen, ammonia total [as N]30-day average≤ 1.3 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 2.7 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 4.5 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 1.8 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 1.2 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 2.9 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 3.9 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 3.9 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 1.8 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 1.8 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 6.6 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 4.9 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 14.2 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 15.7 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 7.1 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 16 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 13.3 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 4.9 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 10.4 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 9.5 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 17.7 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 7.7 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 30.1 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 11.6 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 8 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 18.9 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 25.9 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 26 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 11.9 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 7 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 13 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 49.6 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 104.1 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 36.9 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 100.6 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 111.3 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 53.2 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 113.2 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 104.1 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 107.7 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 99.2 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 36.9 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 78 lb/dMay
Nitrogen, Kjeldahl, total [as N]30-day averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]30-day averagereport only (lb/d)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (lb/d)all year
Phosphorus, total [as P]30-day averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]30-day averagereport only (lb/d)all year
Phosphorus, total [as P]daily maximumreport only (lb/d)all year
E. coligeometric mean≤ 229 #/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≤ 177 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 283 lb/dall year

New limits from Feb 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chloride [as Cl], 30-day average2803 lb/dnew367 lb/d (11 values)0.131×
Chloride [as Cl], 30-day average402 mg/Lnew78.4 mg/L (11 values)0.195×
Chloride [as Cl], daily maximum4466 lb/dnew367 lb/d (11 values)0.0822×
Chloride [as Cl], daily maximum631 mg/Lnew78.4 mg/L (11 values)0.124×

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/IA0083518 · MCP: https://passage-data.com/mcp