Passage Data · Check a report · Use it from your AI

City of New Hampton

Sewage treatment plant, major discharger, New Hampton, Iowa. NPDES permit IA0028525 expired May 31, 2024; its limits still apply. Last 12 months: over a limit 12 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (25 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
40 values over a limit, 0 required values missing, 3 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025Aluminum, total [as Al], 30-day average.14398≤ .0873 mg/L65%
November 2025Aluminum, total [as Al], 30-day average.168625≤ .0873 mg/L93%
November 2025Copper, total [as Cu], 30-day average.017391≤ .0171 mg/L2%
November 2025Copper, total [as Cu], daily maximum.03≤ .0269 mg/L12%
December 2025Aluminum, total [as Al], 30-day average.1712≤ .0873 mg/L96%
December 2025Copper, total [as Cu], 30-day average.018113≤ .0171 mg/L6%
January 2026Aluminum, total [as Al], 30-day average.137075≤ .0873 mg/L57%
February 2026Aluminum, total [as Al], 30-day average.102975≤ .0873 mg/L18%
May 2026Copper, total [as Cu], 30-day average.017171≤ .0171 mg/L0%
June 2026Copper, total [as Cu], daily maximum.0317≤ .0269 mg/L18%
August 2026Copper, total [as Cu], daily maximum.0959≤ .0269 mg/L257%
August 2026Copper, total [as Cu], daily maximum.90618≤ .4939 lb/d83%

Limits in force (69)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 550 lb/dall year
Solids, total suspended7-day average≤ 825 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 2.4 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 3.6 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 2.6 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 4.1 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 1.8 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 1.4 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 3.6 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 4.2 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 8.4 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 9.2 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 13.1 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 11.8 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 14.2 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 6.4 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 4.6 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 3.5 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 14.2 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 5.8 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 3.4 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 19.9 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 43.8 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 28.8 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 64.3 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 46.7 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 74.6 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 32.8 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 24.7 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 19 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 64.3 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 29.4 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 18 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 62.4 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 126.6 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 139.4 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 200 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 18 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 242.2 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 97.2 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 67.9 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 51.4 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 214.7 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 86.2 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 49.5 lb/dAug
Copper, total [as Cu]30-day average≤ .0171 mg/Lall year
Copper, total [as Cu]daily maximum≤ .0269 mg/Lall year
Copper, total [as Cu]30-day average≤ .3118 lb/dall year
Copper, total [as Cu]daily maximum≤ .4939 lb/dall year
Aluminum, total [as Al]30-day average≤ .0873 mg/Lall year
Aluminum, total [as Al]daily maximum≤ .7502 mg/Lall year
Aluminum, total [as Al]30-day average≤ 1.6016 lb/dall year
Aluminum, total [as Al]daily maximum≤ 13.7652 lb/dall year
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1 N=0;Y=1all year
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1 N=0;Y=1all year
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≤ 459 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 734 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

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0028525 · MCP: https://passage-data.com/mcp