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Symes Hot Springs Hotel and Mineral Bath

Sewerage Systems, Hot Springs, Montana. NPDES permit MT0030619 expired Jul 31, 2025; its limits still apply. Last 12 months: over a limit 3 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (13 values), outfall DS1 form Q quarterly (10 values), outfall US1 form Q quarterly (6 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
5 values over a limit, 0 required values missing, 0 of 36 reports late

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

Period endingParameterReportedLimit
October 2025pH change [range], value.7 SU≤ .5 SU
December 2025pH change [range], value2 SU≤ .5 SU
July 2026pH change [range], value1.2 SU≤ .5 SU

Limits in force (29)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
pHminimum≥ 6.5 SU (alert, not enforceable)all year001
pHmaximum≤ 9 SU (alert, not enforceable)all year001
Solids, total suspended30-day average≤ 30 mg/Lall year001
Solids, total suspended7-day average≤ 45 mg/Lall year001
Coliform, fecal - % samples exceeding limittotalreport only (%)all year001
E. coli30-day geometric mean≤ 126 #/100mLall year001
E. coli10% of samples≤ 252 #/100mLall year001
E. coli exceedancestotalreport only (%)all year001
Coliform, fecal general30-day geometric mean≤ 200 #/100mLall year001
Coliform, fecal general10% of samples≤ 400 #/100mLall year001
Flow30-day averagereport only (MGD)all year001
Flowdaily maximumreport only (MGD)all year001
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all yearDS1
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all yearDS1
pHminimum≥ 6.5 SUall yearDS1
pHminimum≥ 6.5 SUall yearDS1
pHmaximum≤ 9 SUall yearDS1
pHmaximum≤ 9 SUall yearDS1
Temp. diff. between up/down stream deg. Fvaluereport only (deg F)all yearDS1
Temp. diff. between up/down stream deg. Fvaluereport only (deg F)all yearDS1
pH change [range]value≤ .5 SUall yearDS1
pH change [range]value≤ .5 SUall yearDS1
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all yearUS1
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all yearUS1
pHminimum≥ 6.5 SUall yearUS1
pHminimum≥ 6.5 SUall yearUS1
pHmaximum≤ 9 SUall yearUS1
pHmaximum≤ 9 SUall yearUS1

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MT0030619 · MCP: https://passage-data.com/mcp