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Dundee Resort Development LLC

Sewerage Systems, Dillon, Colorado. NPDES permit CO0023876 expired Jul 31, 2020; its limits still apply. Last 12 months: over a limit once (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (22 values), outfall 001 form Q quarterly (4 values), outfall 300 form I monthly (9 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 28 reports late

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

Period endingParameterReportedLimitOver by
December 2025Phosphorus, total [as P], daily maximum.76 mg/L≤ .5 mg/L52%

Limits in force (70)

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≤ 85 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 80 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 78 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 84 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 85 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 19.6 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 85 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 85 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 19.6 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 68 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 19.6 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 19.6 mg/LDec001
Nitrogen, ammonia total [as N]30-day average≤ 19.6 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 19.6 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 85 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 85 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 85 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 85 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 85 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 85 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 85 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 85 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 85 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 85 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 85 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 85 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 85 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 85 mg/LFeb001
Nitrogen, ammonia total [as N]rolling average≤ 12 mg/LJul001
Nitrogen, ammonia total [as N]rolling average≤ 12 mg/LAug001
Nitrogen, ammonia total [as N]rolling average≤ 30 mg/LFeb001
Nitrogen, ammonia total [as N]rolling average≤ 16 mg/LJun001
Nitrogen, ammonia total [as N]rolling average≤ 38 mg/LOct001
Nitrogen, ammonia total [as N]rolling average≤ 30 mg/LJan001
Nitrogen, ammonia total [as N]rolling average≤ 10 mg/LMay001
Nitrogen, ammonia total [as N]rolling average≤ 11 mg/LSep001
Phosphorus, total [as P]30-day averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximum≤ .5 mg/Lall year001
Phosphorus, total [as P]annual total≤ 11.4 lb/yrall year001
Phosphorus, total [as P]monthly totalreport only (lb/mo)all year001
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year001
Flow, in conduit or thru treatment plant30-day average≤ .035 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residual30-day average≤ .05 mg/Lall year001
E. coli30-day geometric mean≤ 1920 #/100mLall year001
E. colimaximum 7-day geometric mean≤ 3840 #/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 dissolved30-day averagereport only (mg/L)all year001
Solids, total dissolveddaily maximumreport 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
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/CO0023876 · MCP: https://passage-data.com/mcp