Passage Data · Check a report · Use it from your AI

Glacier National Park

Federal facility (Sewerage Systems), West Glacier, Montana. NPDES permit MT0030601 expired Dec 31, 2016; its limits still apply. Last 12 months: over a limit once (last May 2026), 2 required values missing, 1 of 13 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (33 values), form S twice a year
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 12 required values missing, 6 of 14 reports late

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

Period endingParameterReportedLimitOver by
May 2026Nitrogen, total [as N], 30-day average7.84 mg/L≤ 7 mg/L12%

Limits in force (34)

ParameterStatisticLimitMonths
Flow ratedaily averagereport only (MGD)all year
Flow ratedaily maximumreport only (MGD)all year
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. C7-day average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. C30-day average≤ 50 lb/dall year
BOD, 5-day, 20 deg. C7-day average≤ 75 lb/dall year
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year
BOD, 5-day, 20 deg. C7-day averagereport only (mg/L)all year
BOD, 5-day, 20 deg. C30-day averagereport only (lb/d)all year
BOD, 5-day, 20 deg. C7-day averagereport only (lb/d)all year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 50 lb/dall year
Solids, total suspended7-day average≤ 75 lb/dall year
Solids, total suspended30-day averagereport only (mg/L)all year
Solids, total suspended7-day averagereport only (mg/L)all year
Solids, total suspended30-day averagereport only (lb/d)all year
Solids, total suspended7-day averagereport only (lb/d)all year
Oil and grease, hexane extr methodsingle grab samplereport only (mg/L)all year
Nitrogen, total [as N]30-day average≤ 7 mg/Lall year
Nitrogen, total [as N]30-day average≤ 11.7 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 3 mg/Lall year
Nitrogen, ammonia total [as N]30-day average≤ 5 lb/dall year
Nitrogen, Kjeldahl, total [as N]single grab samplereport only (mg/L)all year
Nitrite + Nitrate total [as N]single grab samplereport only (mg/L)all year
Phosphorus, total [as P]30-day average≤ .7 mg/Lall year
Phosphorus, total [as P]30-day average≤ 1.2 lb/dall year
E. colimonthly geometric mean≤ 32 CFU/100mLall year
E. coliweekly geometric mean≤ 64 CFU/100mLall year
BOD, 5-day, percent removalminimum≥ 85 %all year
Solids, suspended percent removalminimum≥ 85 %all year
Oil and grease visualvaluereport only (occur/mo)all year

How strict are these limits?

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

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MT0030601 · MCP: https://passage-data.com/mcp