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University of Denver

Sewerage Systems, Red Feather Lakes, Colorado. NPDES permit CO0047317 expired Aug 31, 2020; its limits still apply. Last 12 months: over a limit 5 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (21 values), outfall 300 form I monthly (10 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
October 2025E. coli, rolling average445 #/100mL≤ 19 #/100mL2242%
May 2026E. coli, rolling average444 #/100mL≤ 19 #/100mL2237%
June 2026E. coli, rolling average443 #/100mL≤ 19 #/100mL2232%
July 2026E. coli, rolling average443 #/100mL≤ 19 #/100mL2232%
August 2026E. coli, rolling average443 #/100mL≤ 19 #/100mL2232%

Limits in force (36)

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
BOD, 5-day, 20 deg. C30-day average≤ 3.25 lb/dall 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
Solids, total suspended30-day average≤ 3.25 lb/dall year001
Nitrogen, ammonia total [as N]30-day average≤ 30 mg/Lall year001
Nitrogen, ammonia total [as N]daily maximum≤ 30 mg/Lall year001
Nitrogen, ammonia total [as N]rolling average≤ 12 mg/LAug001
Nitrogen, ammonia total [as N]rolling average≤ 12 mg/LOct001
Nitrogen, ammonia total [as N]rolling average≤ 12 mg/LSep001
Nitrogen, ammonia total [as N]rolling average≤ 12 mg/LMay001
Nitrogen, ammonia total [as N]rolling average≤ 12 mg/LJul001
Nitrogen, ammonia total [as N]rolling average≤ 12 mg/LJun001
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year001
Flow, in conduit or thru treatment plant30-day average≤ .013 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residual30-day average≤ .29 mg/Lall year001
Chlorine, total residualdaily maximum≤ .49 mg/Lall year001
Chlorine, total residualrolling average≤ .044 mg/Lall year001
E. coli30-day geometric mean≤ 2000 #/100mLall year001
E. colimaximum 7-day geometric mean≤ 4000 #/100mLall year001
E. colirolling average≤ 19 #/100mLall 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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Your permit document is the final word. As JSON: /api/v1/permits/CO0047317 · MCP: https://passage-data.com/mcp