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

Mounds Production Company

Clay And Related Minerals, Mounds, Illinois. NPDES permit IL0078964 expired Sep 30, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 25 days after each period: form 0 monthly (8 values)
Last report on file: September 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 1 of 12 reports late

Limits in force (8)

Parameter	Statistic	Limit	Months
pH	minimum	≥ 6.5 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	monthly average	≤ 35 mg/L	all year
Solids, total suspended	daily maximum	≤ 70 mg/L	all year
Manganese, total [as Mn]	30-day average	report only (mg/L)	all year
Manganese, total [as Mn]	daily maximum	report only (mg/L)	all year
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year
Offensive Conditions	maximum	report only (N=0;Y=1)	all year

How strict are these limits?

pH, minimum at least 6.5 SU — stricter than 84% of 395 other minor industrial and other permits in Illinois; 16% have the same limit
Solids, total suspended, monthly average 35 mg/L — stricter than 17% of 308 other minor industrial and other permits in Illinois; 2% have the same limit

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

Same industry: the 24 Mining and Quarrying of Nonmetallic Minerals permits in Illinois.

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/IL0078964 · MCP: https://passage-data.com/mcp