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City of Shenandoah

Sewage treatment plant, major discharger, Shenandoah, Iowa. NPDES permit IA0032328, in force until Jan 31, 2027. Last 12 months: over a limit 25 times (last May 2026), 2 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (51 values)
Renewal application due
Aug 4, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
10 values over a limit, 0 required values missing, 1 of 12 reports late

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

All 25 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], 30-day average15.74555≤ 15 mg/L5%
October 2025Nitrogen, ammonia total [as N], daily maximum35.6≤ 19 mg/L87%
November 2025BOD, carbonaceous [5 day, 20 C], 30-day average26.7375≤ 25 mg/L7%
November 2025BOD, carbonaceous [5 day, 20 C], 7-day average44.3≤ 40 mg/L11%
November 2025Nitrogen, ammonia total [as N], daily maximum27.6≤ 17 mg/L62%
December 2025BOD, carbonaceous [5 day, 20 C], 30-day average60.2≤ 25 mg/L141%
December 2025BOD, carbonaceous [5 day, 20 C], 7-day average151.25≤ 40 mg/L278%
December 2025BOD, carbonaceous [5 day, 20 C], 7-day average870.281≤ 627 lb/d39%
December 2025Nitrogen, ammonia total [as N], 30-day average31.94≤ 19 mg/L68%
December 2025Nitrogen, ammonia total [as N], daily maximum305.1639≤ 280 lb/d9%
December 2025Nitrogen, ammonia total [as N], daily maximum50.4≤ 19 mg/L165%
December 2025Solids, total suspended, 30-day average53.33333≤ 30 mg/L78%
December 2025Solids, total suspended, 7-day average112≤ 45 mg/L149%
January 2026BOD, carbonaceous [5 day, 20 C], 30-day average26.95≤ 25 mg/L8%
January 2026Nitrogen, ammonia total [as N], 30-day average36.7375≤ 19 mg/L93%
January 2026Nitrogen, ammonia total [as N], daily maximum283.1013≤ 276 lb/d3%
January 2026Nitrogen, ammonia total [as N], daily maximum48.1≤ 19 mg/L153%
March 2026BOD, carbonaceous [5 day, 20 C], 30-day average44.56666≤ 25 mg/L78%
March 2026BOD, carbonaceous [5 day, 20 C], 7-day average89.35≤ 40 mg/L123%
March 2026Nitrogen, ammonia total [as N], 30-day average20.13111≤ 18 mg/L12%
March 2026Nitrogen, ammonia total [as N], daily maximum33.2≤ 18 mg/L84%
March 2026Solids, total suspended, 30-day average63.2≤ 30 mg/L111%
March 2026Solids, total suspended, 7-day average156≤ 45 mg/L247%
March 2026Solids, total suspended, 7-day average953.6623≤ 706 lb/d35%
May 2026Solids, total suspended, 7-day average48≤ 45 mg/L7%

Limits in force (51)

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≤ 470 lb/dall year
Solids, total suspended7-day average≤ 706 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, 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, 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
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
Chloride [as Cl]30-day averagereport only (mg/L)all year
Chloride [as Cl]daily maximumreport only (mg/L)all year
Chloride [as Cl]30-day averagereport only (lb/d)all year
Chloride [as Cl]daily maximumreport only (lb/d)all year
Zinc, total [as Zn]30-day averagereport only (mg/L)all year
Zinc, total [as Zn]daily maximumreport only (mg/L)all year
Zinc, total [as Zn]30-day averagereport only (lb/d)all year
Zinc, total [as Zn]daily maximumreport only (lb/d)all 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≤ 392 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 627 lb/dall year

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0032328 · MCP: https://passage-data.com/mcp