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West Montrose Sanitation District

Sewage treatment plant, Montrose, Colorado. NPDES permit CO0030449 expired Apr 30, 2024; its limits still apply. Last 12 months: no values over a limit, 3 of 28 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (9 values), outfall 001 form Q quarterly (19 values), outfall 300 form I monthly (3 values), outfall 300 form Q quarterly (7 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 32 reports late

Limits in force (44)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum 7-day average≤ 45 mg/Lall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspended30-day average≤ 30 mg/Lall year001
Solids, total suspendedmaximum 7-day average≤ 45 mg/Lall year001
Nitrogen, ammonia total [as N]30-day average≤ 6 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 5.8 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 7.2 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 5.8 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 12 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 13 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 26 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 12 mg/LDec001
Nitrogen, inorganic totaldaily maximum≤ 11 mg/Lall year001
Arsenic, total recoverable30-day averagereport only (ug/L)all year001
Iron, total recoverable30-day averagereport only (ug/L)all year001
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year001
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year001
Selenium, potentially dissolvd30-day average≤ .048 lb/dall year001
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year001
Flow, in conduit or thru treatment plant30-day average≤ .7 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residual30-day average≤ .059 mg/Lall year001
Chlorine, total residualinstantaneous maximum≤ .041 mg/Lall year001
E. coli30-day geometric mean≤ 640 #/100mLall year001
E. colimaximum 7-day geometric mean≤ 1280 #/100mLall year001
Solids, total dissolved30-day averagereport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Solids, total dissolved30-day averagereport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all year001
Plant capacity fact. percent of capacity30-day averagereport only (%)all year300
Plant capacity fact. percent of capacity30-day averagereport only (%)all year300
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year300
BOD, 5-day, 20 deg. Cmaximum 7-day averagereport only (mg/L)all year300
BOD, 5-day, 20 deg. C30-day averagereport only (lb/d)all year300
BOD, 5-day, 20 deg. Cmaximum 7-day averagereport only (lb/d)all year300
Solids, total suspended30-day averagereport only (mg/L)all year300
Solids, total suspendedmaximum 7-day averagereport only (mg/L)all year300
Flow, in conduit or thru treatment plant30-day averagereport only (MGD)all year300
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year300

How strict are these limits?

Cited limits by parameter: Colorado'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/CO0030449 · MCP: https://passage-data.com/mcp