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Perry Park Water and Sanitation District

Sewage treatment plant, Douglas County, Colorado. NPDES permit CO0022551 expired Jun 30, 2017; its limits still apply. Last 12 months: no values over a limit, 13 of 25 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (23 values), outfall 001 form Q quarterly (2 values), outfall 300 form I monthly (10 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 4 of 28 reports late

Limits in force (80)

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
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≤ 25 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 13 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 15 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 30 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 20 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 30 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 30 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 13 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 20 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 25 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 30 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 25 mg/LDec001
Nitrogen, ammonia total [as N]30-day average≤ 15.7 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 15.5 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 15.1 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 12.8 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 14 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 12.2 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 8.9 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 8.8 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 9.1 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 10.6 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 12.6 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 14 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 25 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 20 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 25 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 30 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 25 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 30 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 30 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 23 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 24 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 25 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 30 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 25 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 68 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 63 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 60 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 64 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 72 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 75 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 60 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 61 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 60 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 59 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 57 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 58 mg/LDec001
Phosphorus, total [as P]30-day average≤ 1 mg/Lall year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly totalreport only (lb/mo)all year001
Phosphorus, total [as P]annual total≤ 365 lb/yrDec001
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year001
Flow, in conduit or thru treatment plant30-day average≤ .32 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residual30-day average≤ .02 mg/Lall year001
Chlorine, total residualinstantaneous maximum≤ .034 mg/Lall year001
E. coli30-day geometric mean≤ 224 #/100mLall year001
E. colimaximum 7-day geometric mean≤ 448 #/100mLall 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 (N=0;Y=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/CO0022551 · MCP: https://passage-data.com/mcp