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Charles City Community School District

Elementary And Secondary Schools, Charles City, Iowa. NPDES permit IA0080225, in force until Aug 31, 2027. Last 12 months: over a limit once (last April 2026), 6 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form A monthly (6 values)
Renewal application due: Mar 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file: August 2026
Oct 2024 – Sep 2025: 2 values over a limit, 6 required values missing, 4 of 12 reports late

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

Period ending	Parameter	Reported	Limit
April 2026	pH, daily minimum	6.46	≥ 6.5 SU

Limits in force (6)

Parameter	Statistic	Limit	Months
pH	daily minimum	≥ 6.5 SU	all year
pH	daily maximum	≤ 9 SU	all year
Iron, total [as Fe]	30-day average	≤ 1.3 mg/L	all year
Iron, total [as Fe]	daily maximum	≤ 1.3 mg/L	all year
Iron, total [as Fe]	30-day average	≤ 4.192 lb/d	all year
Iron, total [as Fe]	daily maximum	≤ 4.192 lb/d	all year

How strict are these limits?

pH, daily minimum at least 6.5 SU — stricter than 60% of 423 other minor industrial and other permits in Iowa; 39% have the same limit
Iron, total [as Fe], 30-day average 1.3 mg/L — stricter than 19% of 62 other minor industrial and other permits in Iowa
Iron, total [as Fe], daily maximum 1.3 mg/L — stricter than 19% of 62 other minor industrial and other permits in Iowa

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

Same industry: the 30 Educational Services permits in Iowa.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0080225 · MCP: https://passage-data.com/mcp