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Vcna Prairie, Inc

Ready-Mixed Concrete, Des Plaines, Illinois. NPDES permit IL0068063, in force until Jul 31, 2030. Last 12 months: over a limit 2 times (last May 2026), 4 of 11 reports late. 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
Oct 2024 – Sep 2025: 3 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period ending	Parameter	Reported	Limit	Over by
May 2026	Solids, total suspended, 30-day average	53 mg/L	≤ 15 mg/L	253%
May 2026	Solids, total suspended, daily maximum	53 mg/L	≤ 30 mg/L	77%

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	≤ 30 mg/L	all year
Iron, total [as Fe]	daily maximum	report only (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
Offensive Conditions	maximum	report only (N=0;Y=1)	all year

How strict are these limits?

pH, monthly minimum at least 6.5 SU — stricter than 38% of 286 other minor industrial and other permits in Illinois; 61% have the same limit
Solids, total suspended, 30-day average 15 mg/L — stricter than 37% of 259 other minor industrial and other permits in Illinois; 48% have the same limit
Solids, total suspended, daily maximum 30 mg/L — stricter than 20% of 508 other minor industrial and other permits in Illinois; 24% have the same limit

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

Same industry: the 11 Stone, Clay, Glass and Concrete Products 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/IL0068063 · MCP: https://passage-data.com/mcp