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Salish and Kootenai Housing Authority

Sewage treatment plant, St. Ignatius, Montana. NPDES permit MT0029017, in force until Mar 31, 2031. Last 12 months: over a limit 11 times (last August 2026), 20 required values missing, 2 of 23 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001A form A monthly (24 values), outfall 001I form I monthly (2 values), outfall 001R form R quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
17 values over a limit, 0 required values missing, 4 of 24 reports late

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

Period endingParameterReportedLimitOver by
February 2026Coliform, fecal general, daily maximum1550 #/100mL≤ 400 #/100mL288%
February 2026E. coli, 30-day average131.678 #/100mL≤ 126 #/100mL5%
February 2026E. coli, 7-day average1990 #/100mL≤ 252 #/100mL690%
March 2026Coliform, fecal general, daily maximum488 #/100mL≤ 400 #/100mL22%
April 2026E. coli, daily maximum921 #/100mL≤ 252 #/100mL265%
May 2026E. coli, 30-day average166.61 #/100mL≤ 126 #/100mL32%
May 2026E. coli, daily maximum2420 #/100mL≤ 252 #/100mL860%
May 2026Solids, suspended percent removal, monthly minimum75.51 %≥ 85 %63%
June 2026E. coli, 30-day average226.56 #/100mL≤ 126 #/100mL80%
June 2026E. coli, daily maximum435 #/100mL≤ 252 #/100mL73%
August 2026Nitrogen, ammonia total [as N], 30-day average1.33 mg/L≤ 1.11 mg/L20%

Limits in force (29)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrade30-day averagereport only (deg C)all year001A
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001A
Flow rate30-day averagereport only (gal/d)all year001A
Flow ratedaily maximumreport only (gal/d)all year001A
Oxygen, dissolved [DO]minimumreport only (mg/L)all year001A
Oxygen, dissolved [DO]7-day averagereport only (mg/L)all year001A
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/Lall year001A
BOD, 5-day, 20 deg. C7-day average≤ 45 mg/Lall year001A
pHminimum≥ 6.5 SUall year001A
pHmaximum≤ 8.5 SUall year001A
Solids, total suspended30-day average≤ 30 mg/Lall year001A
Solids, total suspended7-day average≤ 45 mg/Lall year001A
Oil & Greasedaily maximum≤ 10 mg/Lall year001A
Nitrogen, total [as N]average valuereport only (mg/L)Jun–Sep001A
Nitrogen, ammonia total [as N]30-day average≤ 1.11 mg/Lall year001A
Nitrogen, ammonia total [as N]daily maximum≤ 4.79 mg/Lall year001A
Nitrogen, Kjeldahl, total [as N]average valuereport only (mg/L)Jun–Sep001A
Nitrite + Nitrate total [as N]average valuereport only (mg/L)Jun–Sep001A
Phosphorus, total [as P]average valuereport only (mg/L)Jun–Sep001A
E. coli30-day average≤ 126 #/100mLall year001A
E. colidaily maximum≤ 252 #/100mLall year001A
BOD, 5-day, percent removalmonthly minimum≥ 85 %all year001A
Solids, suspended percent removalmonthly minimum≥ 85 %all year001A
Oil and grease visualvaluereport only (N=0;Y=1)all year001A
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year001I
Solids, total suspended30-day averagereport only (mg/L)all year001I
Temperature, water deg. centigradeaverage valuereport only (deg C)all year001R
Oxygen, dissolved [DO]average valuereport only (mg/L)all year001R
pHaverage valuereport only (SU)all year001R

How strict are these limits?

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/MT0029017 · MCP: https://passage-data.com/mcp