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Concrete General Inc

Industrial or other facility, Gaithersburg, Maryland. NPDES permit MD0072214, in force until Jun 30, 2031. Last 12 months: no values over a limit, 5 of 5 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form A quarterly, form T twice a year
Last report on file: June 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 2 of 6 reports late

Limits in force (9)

Parameter	Statistic	Limit	Months
pH	minimum	≥ 6.5 SU	all year
pH	daily maximum	≤ 8.5 SU	all year
Oil & Grease	daily maximum	≤ 15 mg/L	all year
Suspended Solids, Total	maximum monthly average	≤ 30 mg/L	all year
Suspended Solids, Total	daily maximum	≤ 45 mg/L	all year
Temp. difference, summer [deg. F]	daily maximum	≤ 0 deg F	all year
Temp. difference, winter [deg. F]	daily maximum	≤ 0 deg F	all year
Flow	daily maximum	report only (gal/d)	all year
Flow	monthly average	report only (gal/d)	all year

How strict are these limits?

pH, daily maximum 8.5 SU — stricter than 89% of 6,223 other minor industrial and other permits nationwide; 10% have the same limit
pH, minimum at least 6.5 SU — stricter than 15% of 145 other minor industrial and other permits in Maryland; 84% have the same limit
Oil & Grease, daily maximum 15 mg/L — stricter than 13% of 2,554 other minor industrial and other permits nationwide; 78% have the same limit

Cited limits by parameter: Maryland'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/MD0072214 · MCP: https://passage-data.com/mcp