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City of Bozeman

Sewage treatment plant, Bozeman, Montana. NPDES permit MT0031631, in force until Nov 30, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form A monthly (7 values)
Last report on file: September 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (7)

Parameter	Statistic	Limit	Months
Flow rate	monthly average	report only (MGD)	all year
Flow rate	daily maximum	report only (MGD)	all year
pH	monthly minimum	≥ 6.5 SU	all year
pH	monthly maximum	≤ 8.5 SU	all year
Fluoride, total [as F]	daily maximum	≤ .6 mg/L	all year
Chlorine, total residual	monthly average	≤ .09999 mg/L	all year
Chlorine, total residual	daily maximum	≤ .09999 mg/L	all year

How strict are these limits?

pH, monthly minimum at least 6.5 SU — stricter than 99% of 213 other minor POTWs nationwide; 1% have the same limit
pH, monthly maximum 8.5 SU — stricter than 98% of 217 other minor POTWs nationwide; 1% have the same limit
Chlorine, total residual, daily maximum .09999 mg/L — stricter than 66% of 21 other minor POTWs in Montana; 5% have the same limit

Cited limits by parameter: Montana'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/MT0031631 · MCP: https://passage-data.com/mcp