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Asphalt Materials, Inc.

Industrial or other facility, Morris, Illinois. NPDES permit IL0080198, in force until Nov 30, 2030. Last 12 months: over a limit once (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due: About 25 days after each period: form 0 monthly (8 values)
Last report on file: August 2026

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

Period ending	Parameter	Reported	Limit	Over by
June 2026	Solids, total suspended, daily maximum	184 mg/L	≤ 23 mg/L	700%

Limits in force (8)

Parameter	Statistic	Limit	Months
pH	monthly minimum	≥ 6.5 SU	all year
pH	monthly maximum	≤ 9 SU	all year
Solids, total suspended	30-day average	≤ 15 mg/L	all year
Solids, total suspended	daily maximum	≤ 23 mg/L	all year
Oil & Grease	30-day average	≤ 10 mg/L	all year
Oil & Grease	daily maximum	≤ 15 mg/L	all year
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year

How strict are these limits?

Solids, total suspended, daily maximum 23 mg/L — stricter than 99% of 508 other minor industrial and other permits in Illinois
Oil & Grease, 30-day average 10 mg/L — stricter than 98% of 62 other minor industrial and other permits in Illinois
Oil & Grease, daily maximum 15 mg/L — stricter than 98% of 65 other minor industrial and other permits in Illinois

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IL0080198 · MCP: https://passage-data.com/mcp