Passage Data · Check a report · Use it from your AI

Grizzly Peak Water Sales and Distribution LLC

Sewerage Systems, Durango, Colorado. NPDES permit CO0039691 expired Jan 31, 2024; its limits still apply. Last 12 months: over a limit 2 times (last March 2026), 3 of 36 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (20 values), outfall 001 form Q quarterly (4 values), outfall 300 form I monthly (10 values), outfall UST1 form A monthly (2 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
5 values over a limit, 0 required values missing, 12 of 40 reports late

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

Period endingParameterReportedLimitOver by
March 2026Nitrogen, ammonia total [as N], 30-day average26.3 mg/L≤ 15 mg/L75%
March 2026Nitrogen, inorganic total, daily maximum26.8 mg/L≤ 18 mg/L49%

Limits in force (85)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademaximum weekly averagereport only (deg C)all year001
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
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
BOD, 5-day, 20 deg. C30-day average≤ 19.3 lb/dall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspended30-day average≤ 75 mg/Lall year001
Solids, total suspendedmaximum 7-day average≤ 110 mg/Lall year001
Nitrogen, ammonia total [as N]30-day average≤ 25 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 19 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 17 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 9.8 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 24 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 22 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 14 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 20 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 17 mg/LDec001
Nitrogen, ammonia total [as N]30-day average≤ 20 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 23 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 17 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 14 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 16 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 15 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 12 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 24 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 34 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 14 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 17 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 17 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 14 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 13 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 7.7 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 34 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 30 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 28 mg/LJan001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jun001
Nitrogen, ammonia total [as N]daily maximum≤ 37 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 36 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 33 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 31 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 27 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 37 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 31 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 28 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 25 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 29 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 28 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 27 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 27 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 39 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 26 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 30 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 28 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 31 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 28 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 21 mg/LDec001
Nitrogen, ammonia total [as N]rolling averagereport only (mg/L)May001
Nitrogen, ammonia total [as N]rolling averagereport only (mg/L)Jun001
Nitrogen, inorganic totaldaily maximumreport only (mg/L)all year001
Nitrogen, inorganic totaldaily maximum≤ 18 mg/Lall year001
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year001
Flow, in conduit or thru treatment plant30-day average≤ .12 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residual30-day average≤ .15 mg/Lall year001
Chlorine, total residual30-day average≤ .098 mg/Lall year001
Chlorine, total residualinstantaneous maximum≤ .18 mg/Lall year001
Chlorine, total residualdaily maximum≤ .12 mg/Lall year001
E. coli30-day geometric mean≤ 1034 #/100mLall year001
E. colimaximum 7-day average≤ 2068 #/100mLall year001
Solids, total dissolved30-day averagereport only (mg/L)all year001
Solids, total dissolved30-day averagereport only (mg/L)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
Temperature, water deg. centigrademaximum weekly averagereport only (deg C)all yearUST1
Temperature, water deg. centigradedaily maximumreport only (deg C)all yearUST1

How strict are these limits?

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

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/CO0039691 · MCP: https://passage-data.com/mcp