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DeKalb County Highway Department

Crushed And Broken Limestone, Liberty, Tennessee. NPDES permit TN0069604 expired Aug 31, 2021; its limits still apply. Last 12 months: no values over a limit, 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form G quarterly (6 values)
Last report on file: August 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 4 of 12 reports late

Limits in force (6)

Parameter	Statistic	Limit	Months
pH	daily minimum	≥ 6 SU	all year
pH	daily maximum	≤ 9 SU	all year
Solids, total suspended	maximum	≤ 40 mg/L	all year
Solids, total suspended	daily maximum	≤ 40 mg/L	all year
Flow, in conduit or thru treatment plant	maximum	report only (gal/min)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (gal/min)	all year

How strict are these limits?

Solids, total suspended, maximum 40 mg/L — stricter than 76% of 21 other minor industrial and other permits in Tennessee; 24% have the same limit
Solids, total suspended, daily maximum 40 mg/L — stricter than 22% of 474 other minor industrial and other permits in Tennessee; 74% have the same limit

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

Same industry: the 353 Mining and Quarrying of Nonmetallic Minerals permits in Tennessee.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TN0069604 · MCP: https://passage-data.com/mcp