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Joliet Mi, LLC

Crushed And Broken Limestone, Joliet, Illinois. NPDES permit IL0077780, in force until Apr 30, 2031. 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 (6 values)
Last report on file: September 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (6)

Parameter	Statistic	Limit	Months
pH	minimum	≥ 6 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
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year
Offensive Conditions	value	report only (N=0;Y=1)	all year

How strict are these limits?

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.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IL0077780 · MCP: https://passage-data.com/mcp