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City of Toronto

Sewage treatment plant, Toronto, Iowa. NPDES permit IA0076996, in force until Apr 30, 2029. Last 12 months: over a limit 5 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (15 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
24 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
March 2026Nitrogen, ammonia total [as N], 30-day average88≤ 38.1 mg/L131%
March 2026Nitrogen, ammonia total [as N], daily maximum88≤ 38.1 mg/L131%
April 2026BOD, carbonaceous [5 day, 20 C], 30-day average61≤ 25 mg/L144%
April 2026BOD, carbonaceous [5 day, 20 C], 7-day average61≤ 40 mg/L53%
May 2026BOD, carbonaceous [5 day, 20 C], 30-day average32≤ 25 mg/L28%

Limits in force (59)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 1 mg/Lall year
pHdaily minimum≥ 6 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≤ 4.2 lb/dall year
Solids, total suspended7-day average≤ 6.3 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 45.6 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 38.1 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 40.7 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 40.7 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 42 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 38.1 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 36.8 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 39.4 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 37.4 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 39.4 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 42.7 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 41.4 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 45.6 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 38.1 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 40.7 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 40.7 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 42 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 38.1 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 36.8 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 39.4 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 37.4 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 39.4 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 42.7 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 41.4 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 6.3 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 5.3 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 5.7 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 5.7 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 5.9 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 5.3 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 5.1 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 5.5 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 5.2 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 5.5 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 6 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 5.8 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 6.3 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 5.3 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 5.7 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 5.7 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 5.9 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 5.3 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 5.1 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 5.5 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 5.2 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 5.5 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 6 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 5.8 lb/dDec
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≤ 3.5 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 5.6 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/IA0076996 · MCP: https://passage-data.com/mcp