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United States Gypsum Corporation

Paper Mills, North Kansas City, Missouri. NPDES permit MO0136263 expired Jun 30, 2024; its limits still apply. Last 12 months: no values over a limit, 1 of 3 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form Q quarterly (7 values)
Last report on file: June 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 1 of 4 reports late

Limits in force (7)

Parameter	Statistic	Limit	Months
Oxygen demand, chem. [high level] [COD]	daily maximum	report only (mg/L)	all year
pH	minimum	≥ 6.5 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	daily maximum	report only (mg/L)	all year
Solids, settleable	daily maximum	report only (mL/L)	all year
Rainfall	daily maximum	report only (in)	all year
Storm water flow	daily maximum	report only (MGD)	all year

How strict are these limits?

pH, minimum at least 6.5 SU — stricter than 16% of 973 other minor industrial and other permits in Missouri; 84% have the same limit

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0136263 · MCP: https://passage-data.com/mcp