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Montana DEQ

Water, Sewer, And Utility Lines, Belt, Montana. NPDES permit MT0032247, in force until Nov 20, 2030. Last 12 months: over a limit 36 times (last August 2026), 2 required values missing, 2 of 9 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (24 values)
Last report on file
August 2026

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

All 36 values over a limit
Period endingParameterReportedLimitOver by
December 2025Iron, total [as Fe], daily maximum16.9 mg/L≤ 7 mg/L141%
December 2025Iron, total [as Fe], monthly average16.9 mg/L≤ 3.5 mg/L383%
December 2025Solids, total suspended, monthly average53 mg/L≤ 35 mg/L51%
December 2025Zinc, total recoverable, daily maximum313 ug/L≤ 292 ug/L7%
December 2025Zinc, total recoverable, monthly average313 ug/L≤ 146 ug/L114%
January 2026Aluminum, dissolved [as Al], daily maximum580 ug/L≤ 143 ug/L306%
January 2026Aluminum, dissolved [as Al], monthly average300 ug/L≤ 71 ug/L323%
January 2026Iron, total [as Fe], daily maximum40.9 mg/L≤ 7 mg/L484%
January 2026Iron, total [as Fe], monthly average36.6 mg/L≤ 3.5 mg/L946%
January 2026Solids, total suspended, monthly average43.5 mg/L≤ 35 mg/L24%
January 2026Zinc, total recoverable, monthly average206.5 ug/L≤ 146 ug/L41%
February 2026Iron, total [as Fe], daily maximum9.81 mg/L≤ 7 mg/L40%
February 2026Iron, total [as Fe], monthly average8.615 mg/L≤ 3.5 mg/L146%
February 2026Zinc, total recoverable, daily maximum530 ug/L≤ 292 ug/L82%
February 2026Zinc, total recoverable, monthly average287 ug/L≤ 146 ug/L97%
March 2026Iron, total [as Fe], daily maximum11.3 mg/L≤ 7 mg/L61%
March 2026Iron, total [as Fe], monthly average8.02 mg/L≤ 3.5 mg/L129%
April 2026Aluminum, dissolved [as Al], daily maximum410 ug/L≤ 143 ug/L187%
April 2026Aluminum, dissolved [as Al], monthly average230 ug/L≤ 71 ug/L224%
May 2026Aluminum, dissolved [as Al], daily maximum730 ug/L≤ 143 ug/L410%
May 2026Aluminum, dissolved [as Al], monthly average190 ug/L≤ 71 ug/L168%
May 2026Iron, total [as Fe], daily maximum21.7 mg/L≤ 7 mg/L210%
May 2026Iron, total [as Fe], monthly average16.015 mg/L≤ 3.5 mg/L358%
June 2026Iron, total [as Fe], daily maximum65.6 mg/L≤ 7 mg/L837%
June 2026Iron, total [as Fe], monthly average26.02 mg/L≤ 3.5 mg/L643%
June 2026Solids, total suspended, daily maximum74 mg/L≤ 70 mg/L6%
June 2026Zinc, total recoverable, daily maximum415 ug/L≤ 292 ug/L42%
June 2026Zinc, total recoverable, monthly average148.2 ug/L≤ 146 ug/L2%
July 2026Aluminum, dissolved [as Al], daily maximum160 ug/L≤ 143 ug/L12%
July 2026Aluminum, dissolved [as Al], monthly average88.8 ug/L≤ 71 ug/L25%
July 2026Iron, total [as Fe], daily maximum26.2 mg/L≤ 7 mg/L274%
July 2026Iron, total [as Fe], monthly average9.78 mg/L≤ 3.5 mg/L179%
August 2026Aluminum, dissolved [as Al], daily maximum2520 ug/L≤ 143 ug/L1662%
August 2026Aluminum, dissolved [as Al], monthly average1045 ug/L≤ 71 ug/L1372%
August 2026Iron, total [as Fe], daily maximum19.6 mg/L≤ 7 mg/L180%
August 2026Iron, total [as Fe], monthly average9.48 mg/L≤ 3.5 mg/L171%

Limits in force (24)

ParameterStatisticLimitMonths
Flow ratemonthly averagereport only (MGD)all year
Flow ratedaily maximumreport only (MGD)all year
Conductivitymonthly averagereport only (uS/cm)all year
Conductivitydaily maximumreport only (uS/cm)all year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 35 mg/Lall year
Solids, total suspendeddaily maximum≤ 70 mg/Lall year
Arsenic, total recoverablemonthly averagereport only (ug/L)all year
Arsenic, total recoverabledaily maximumreport only (ug/L)all year
Iron, total [as Fe]monthly average≤ 3.5 mg/Lall year
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year
Zinc, total recoverablemonthly average≤ 146 ug/Lall year
Zinc, total recoverabledaily maximum≤ 292 ug/Lall year
Aluminum, dissolved [as Al]monthly average≤ 71 ug/Lall year
Aluminum, dissolved [as Al]daily maximum≤ 143 ug/Lall year
Cadmium, total recoverablemonthly average≤ 1.6 ug/Lall year
Cadmium, total recoverabledaily maximum≤ 3.1 ug/Lall year
Lead, total recoverablemonthly average≤ 12 ug/Lall year
Lead, total recoverabledaily maximum≤ 15 ug/Lall year
Copper, total recoverablemonthly average≤ 19 ug/Lall year
Copper, total recoverabledaily maximum≤ 37 ug/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.

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Your permit document is the final word. As JSON: /api/v1/permits/MT0032247 · MCP: https://passage-data.com/mcp