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

Corn Belt Power Cooperative

Electric Services, Spencer, Iowa. NPDES permit IA0004570, in force until Aug 31, 2029. Last 12 months: over a limit once (last February 2026), 2 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (34 values), outfall 003 form A monthly (3 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 7 required values missing, 2 of 24 reports late

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

Period endingParameterReportedLimitOver by
February 2026Copper, total [as Cu], daily maximum.038≤ .037 mg/L3%

Limits in force (37)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspended30-day average≤ 13.4 mg/Lall year001
Solids, total suspendeddaily maximum≤ 44.6 mg/Lall year001
Solids, total suspended30-day average≤ 5.33 lb/dall year001
Solids, total suspendeddaily maximum≤ 17.8 lb/dall year001
Oil & Grease30-day average≤ 6.68 mg/Lall year001
Oil & Greasedaily maximum≤ 8.91 mg/Lall year001
Oil & Grease30-day average≤ 2.66 lb/dall year001
Oil & Greasedaily maximum≤ 3.55 lb/dall year001
Chromium, hexavalent [as Cr]30-day average≤ .011 mg/Lall year001
Chromium, hexavalent [as Cr]daily maximum≤ .016 mg/Lall year001
Chromium, hexavalent [as Cr]30-day average≤ .032 lb/dall year001
Chromium, hexavalent [as Cr]daily maximum≤ .044 lb/dall year001
Chromium, total [as Cr]30-day average≤ .111 mg/Lall year001
Chromium, total [as Cr]daily maximum≤ .111 mg/Lall year001
Chromium, total [as Cr]30-day average≤ .044 lb/dall year001
Chromium, total [as Cr]daily maximum≤ .044 lb/dall year001
Copper, total [as Cu]30-day average≤ .031 mg/Lall year001
Copper, total [as Cu]daily maximum≤ .037 mg/Lall year001
Copper, total [as Cu]30-day average≤ .08 lb/dall year001
Copper, total [as Cu]daily maximum≤ .1 lb/dall year001
Iron, total [as Fe]30-day average≤ 1 mg/Lall year001
Iron, total [as Fe]daily maximum≤ 1 mg/Lall year001
Iron, total [as Fe]30-day average≤ 2.71 lb/dall year001
Iron, total [as Fe]daily maximum≤ 2.71 lb/dall year001
Zinc, total [as Zn]30-day average≤ .216 mg/Lall year001
Zinc, total [as Zn]daily maximum≤ .216 mg/Lall year001
Zinc, total [as Zn]30-day average≤ .221 lb/dall year001
Zinc, total [as Zn]daily maximum≤ .221 lb/dall year001
Chlorine, total residual30-day average≤ .011 mg/Lall year001
Chlorine, total residualdaily maximum≤ .019 mg/Lall year001
Chlorine, total residual30-day average≤ .033 lb/dall year001
Chlorine, total residualdaily maximum≤ .054 lb/dall year001
Chlorine, free available30-day average≤ .2 mg/Lall year003
Chlorine, free availabledaily maximum≤ .5 mg/Lall year003
Chlorination durationdaily maximum≤ 2 hr/dall year003

How strict are these limits?

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

Same industry: the 14 Electric Services permits in Iowa.

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/IA0004570 · MCP: https://passage-data.com/mcp