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Golden City of

Sewage treatment plant, Jefferson County, Colorado. NPDES permit CO0042170 expired Sep 30, 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: form A quarterly (30 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 4 reports late

Limits in force (30)

ParameterStatisticLimitMonths
pHinstantaneous minimum≥ 5 SUall year
pHmaximum≤ 10 SUall year
Arsenic, total [as As]30-day averagereport only (lb/d)all year
Arsenic, total [as As]daily maximum≤ 2.73 lb/dall year
Cadmium, total [as Cd]30-day averagereport only (lb/d)all year
Cadmium, total [as Cd]daily maximum≤ .57 lb/dall year
Chromium, hexavalent [as Cr]30-day averagereport only (lb/d)all year
Chromium, hexavalent [as Cr]daily maximum≤ 2.22 lb/dall year
Chromium, trivalent [as Cr]30-day averagereport only (lb/d)all year
Chromium, trivalent [as Cr]daily maximum≤ 33.08 lb/dall year
Chromium, total [as Cr]30-day averagereport only (lb/d)all year
Chromium, total [as Cr]daily maximum≤ 18.47 lb/dall year
Copper, total [as Cu]30-day averagereport only (lb/d)all year
Copper, total [as Cu]daily maximum≤ 20.87 lb/dall year
Lead, total [as Pb]30-day averagereport only (lb/d)all year
Lead, total [as Pb]daily maximum≤ 1.07 lb/dall year
Molybdenum, total [as Mo]30-day averagereport only (lb/d)all year
Molybdenum, total [as Mo]daily maximum≤ 8.43 lb/dall year
Nickel, total [as Ni]30-day averagereport only (lb/d)all year
Nickel, total [as Ni]daily maximum≤ 7.79 lb/dall year
Silver, total [as Ag]30-day averagereport only (lb/d)all year
Silver, total [as Ag]daily maximum≤ .35 lb/dall year
Zinc, total [as Zn]30-day averagereport only (lb/d)all year
Zinc, total [as Zn]daily maximum≤ 58.57 lb/dall year
Selenium, total [as Se]30-day averagereport only (lb/d)all year
Selenium, total [as Se]daily maximum≤ .36 lb/dall year
Flow, in conduit or thru treatment plant30-day average≤ 4.8 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Mercury, total [as Hg]30-day averagereport only (lb/d)all year
Mercury, total [as Hg]daily maximum≤ .00999 lb/dall year

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/CO0042170 · MCP: https://passage-data.com/mcp