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

Nederland Town of

Sewage treatment plant, Boulder County, Colorado. NPDES permit CO0020222 expired Aug 31, 2017; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (25 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, 0 of 24 reports late

Limits in force (79)

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≤ 75 mg/Lall year001
Solids, total suspended30-day average≤ 30 mg/Lall year001
Solids, total suspendedmaximum 7-day average≤ 110 mg/Lall year001
Solids, total suspendedmaximum 7-day average≤ 45 mg/Lall year001
Nitrogen, ammonia total [as N]30-day average≤ 33 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 41 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 42.9 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 39.8 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 37.4 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 31.9 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 35 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 40 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 42.8 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 33.7 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 47 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 44.5 mg/LDec001
Nitrogen, ammonia total [as N]30-day average≤ 29 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 31 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 31 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 36 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 22 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 30 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 28 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 33 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 35 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 32 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 25 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 400 mg/LJun001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Sep001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Aug001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jul001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jan001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Mar001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Feb001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Oct001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Nov001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)May001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Apr001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 52 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 59 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 57 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 89 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 232 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 346 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 269 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 164 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 95 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 61 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 46 mg/LDec001
Phosphorus, total [as P]30-day averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Arsenic, total recoverable30-day averagereport only (ug/L)all year001
Arsenic, total recoverabledaily maximumreport only (ug/L)all year001
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year001
Flow, in conduit or thru treatment plant30-day average≤ .25 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residual30-day average≤ .038 mg/Lall year001
Chlorine, total residualinstantaneous maximum≤ .092 mg/Lall year001
E. coli30-day average≤ 724 #/100mLall year001
E. colimaximum 7-day average≤ 1448 #/100mLall year001
BOD, 5-day, 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.

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/CO0020222 · MCP: https://passage-data.com/mcp