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

City of Doon

Sewage treatment plant, Doon, Iowa. NPDES permit IA0023736, in force until Nov 30, 2027. Last 12 months: over a limit 18 times (last June 2026), 4 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (11 values)
Renewal application due
Jun 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
5 values over a limit, 4 required values missing, 1 of 12 reports late

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

All 18 values over a limit
Period endingParameterReportedLimitOver by
November 2025Chloride [as Cl], 30-day average1100≤ 615 mg/L79%
November 2025Chloride [as Cl], 30-day average2715.504≤ 2258 lb/d20%
November 2025Chloride [as Cl], daily maximum1100≤ 657 mg/L67%
November 2025Chloride [as Cl], daily maximum2715.504≤ 2410 lb/d13%
November 2025E. coli, geometric mean560≤ 235 #/100mL138%
November 2025pH, daily minimum6.2≥ 6.3 SU—
December 2025Chloride [as Cl], 30-day average1100≤ 615 mg/L79%
December 2025Chloride [as Cl], 30-day average2770.548≤ 2258 lb/d23%
December 2025Chloride [as Cl], daily maximum1100≤ 657 mg/L67%
December 2025Chloride [as Cl], daily maximum2770.548≤ 2410 lb/d15%
May 2026Chloride [as Cl], 30-day average1200≤ 615 mg/L95%
May 2026Chloride [as Cl], 30-day average2582.064≤ 2258 lb/d14%
May 2026Chloride [as Cl], daily maximum1200≤ 657 mg/L83%
May 2026Chloride [as Cl], daily maximum2582.064≤ 2410 lb/d7%
May 2026E. coli, geometric mean240≤ 235 #/100mL2%
June 2026BOD, carbonaceous [5 day, 20 C], 30-day average39≤ 25 mg/L56%
June 2026Chloride [as Cl], 30-day average1200≤ 615 mg/L95%
June 2026Chloride [as Cl], daily maximum1200≤ 657 mg/L83%

Limits in force (11)

ParameterStatisticLimitMonths
pHdaily minimum≥ 6.3 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspended30-day average≤ 80 mg/Lall year
Solids, total suspended7-day average≤ 120 mg/Lall year
Chloride [as Cl]30-day average≤ 615 mg/Lall year
Chloride [as Cl]daily maximum≤ 657 mg/Lall year
Chloride [as Cl]30-day average≤ 2258 lb/dall year
Chloride [as Cl]daily maximum≤ 2410 lb/dall year
E. coligeometric mean≤ 235 #/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

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/IA0023736 · MCP: https://passage-data.com/mcp