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CH SP Acquisition LLC

Water, Sewer, And Utility Lines, Big Sky, Montana. NPDES permit MT0032174, in force until Oct 31, 2030. 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 (19 values)
Last report on file
September 2026

Limits in force (19)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year
Flow ratemonthly averagereport only (MGD)all year
Flow ratedaily maximumreport only (MGD)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/Lall year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximum≤ 5 mg/Lall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
E. coli, MTEC-MFmonthly geometric mean≤ 2.2 #/100mLall year
E. coli, MTEC-MFmaximum weekly average≤ 12.6 #/100mLall year
Chlorine, total residualmonthly average≤ .09999 mg/Lall year
Chlorine, total residualdaily maximum≤ .09999 mg/Lall year

How strict are these limits?

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

Same industry: the 4 Heavy Construction permits in Montana.

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/MT0032174 · MCP: https://passage-data.com/mcp