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City of Tama

Sewage treatment plant, major discharger, Tama, Iowa. NPDES permit IA0043681, in force until Mar 31, 2030. Last 12 months: over a limit 10 times (last June 2026), 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (43 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
3 values over a limit, 25 required values missing, 1 of 12 reports late

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

Period endingParameterReportedLimitOver by
December 2025Solids, total suspended, 30-day average32.2≤ 30 mg/L7%
January 2026Nitrogen, ammonia total [as N], daily maximum27.7≤ 26.5 mg/L5%
February 2026BOD, carbonaceous [5 day, 20 C], 30-day average31.75≤ 25 mg/L27%
February 2026BOD, carbonaceous [5 day, 20 C], 7-day average68.5≤ 32 mg/L114%
February 2026Nitrogen, ammonia total [as N], 30-day average29.00875≤ 27.2 mg/L7%
February 2026Nitrogen, ammonia total [as N], daily maximum41.4≤ 27.2 mg/L52%
February 2026Solids, total suspended, 30-day average66.75≤ 30 mg/L123%
February 2026Solids, total suspended, 7-day average83≤ 45 mg/L84%
April 2026E. coli, geometric mean705.329≤ 126 #/100mL460%
June 2026Chlorine, total residual, daily maximum.1≤ .048 mg/L108%

Limits in force (87)

ParameterStatisticLimitMonths
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 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≤ 500 lb/dall year
Solids, total suspended7-day average≤ 750 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≤ 26.5 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 24 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 21.9 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 24.3 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 27.2 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 20.7 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 23 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 23 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 24.9 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 24.3 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 25.8 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 24.7 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 26.5 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 24 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 28.1 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 24.3 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 27.2 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 26.3 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 25.4 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 23 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 24.9 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 24.3 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 25.8 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 24.7 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 303.3 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 135.6 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 103.7 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 157.3 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 292.4 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 98.4 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 109.1 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 241.7 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 179.8 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 161.5 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 209.5 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 257.1 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 303.3 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 283.7 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 342.2 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 302.3 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 292.4 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 316.7 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 317.2 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 283.4 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 297.4 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 302.3 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 293.5 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 307.2 lb/dDec
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
Chlorine, total residual30-day average≤ .048 mg/Lall year
Chlorine, total residualdaily maximum≤ .048 mg/Lall year
Chlorine, total residual30-day average≤ .437 lb/dall year
Chlorine, total residualdaily maximum≤ .437 lb/dall year
E. coligeometric mean≤ 126 #/100mLMar–Nov
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≤ 32 mg/Lall year
BOD, carbonaceous [5 day, 20 C]30-day average≤ 135 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 135 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/IA0043681 · MCP: https://passage-data.com/mcp