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NTS Huntsville

Engineering Services, Huntsville, Alabama. NPDES permit AL0056341, in force until May 31, 2027. Last 12 months: no values over a limit, 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form 1 monthly (8 values)
Renewal application due: Dec 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file: September 2026
Oct 2024 – Sep 2025: 4 values over a limit, 64 required values missing, 11 of 12 reports late

Limits in force (8)

Parameter	Statistic	Limit	Months
Temperature, water deg. fahrenheit	daily maximum	≤ 86 deg F	all year
Radioactivity	daily maximum	report only (pCi/L)	all year
pH	daily minimum	≥ 6 SU	all year
pH	daily maximum	≤ 8.5 SU	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
Chlorine, total residual	monthly average	≤ .12 mg/L	all year
Chlorine, total residual	daily maximum	≤ .155 mg/L	all year
Solids, total dissolved	daily maximum	report only (mg/L)	all year

How strict are these limits?

Temperature, water deg. fahrenheit, daily maximum 86 deg F — stricter than 69% of 43 other minor industrial and other permits in Alabama; 28% have the same limit
Chlorine, total residual, daily maximum .155 mg/L — stricter than 38% of 204 other minor industrial and other permits in Alabama
pH, daily maximum 8.5 SU — stricter than 36% of 592 other minor industrial and other permits in Alabama; 63% have the same limit

Cited limits by parameter: Alabama'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/AL0056341 · MCP: https://passage-data.com/mcp