Golden City of

NPDES permit CO0042170 · Minor POTW · administratively continued, expires 2017-09-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2017-09-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 4 forms filed late

Last period with anything received: 2026-06-30.

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among CO permits in EPA's filings — check your permit).

Limits in force (30)

OutfallParameterStatisticLimitMonths
001pHINST MIN >= 5 SU all year
001pHMAXIMUM <= 10 SU all year
001Arsenic, total [as As]30DA AVG report only all year
001Arsenic, total [as As]DAILY MX <= 2.73 lb/d all year
001Cadmium, total [as Cd]30DA AVG report only all year
001Cadmium, total [as Cd]DAILY MX <= .57 lb/d all year
001Chromium, hexavalent [as Cr]30DA AVG report only all year
001Chromium, hexavalent [as Cr]DAILY MX <= 2.22 lb/d all year
001Chromium, trivalent [as Cr]30DA AVG report only all year
001Chromium, trivalent [as Cr]DAILY MX <= 33.08 lb/d all year
001Chromium, total [as Cr]30DA AVG report only all year
001Chromium, total [as Cr]DAILY MX <= 18.47 lb/d all year
001Copper, total [as Cu]30DA AVG report only all year
001Copper, total [as Cu]DAILY MX <= 20.87 lb/d all year
001Lead, total [as Pb]30DA AVG report only all year
001Lead, total [as Pb]DAILY MX <= 1.07 lb/d all year
001Molybdenum, total [as Mo]30DA AVG report only all year
001Molybdenum, total [as Mo]DAILY MX <= 8.43 lb/d all year
001Nickel, total [as Ni]30DA AVG report only all year
001Nickel, total [as Ni]DAILY MX <= 7.79 lb/d all year
001Silver, total [as Ag]30DA AVG report only all year
001Silver, total [as Ag]DAILY MX <= .35 lb/d all year
001Zinc, total [as Zn]30DA AVG report only all year
001Zinc, total [as Zn]DAILY MX <= 58.57 lb/d all year
001Selenium, total [as Se]30DA AVG report only all year
001Selenium, total [as Se]DAILY MX <= .36 lb/d all year
001Flow, in conduit or thru treatment plant30DA AVG <= 4.8 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Mercury, total [as Hg]30DA AVG report only all year
001Mercury, total [as Hg]DAILY MX <= .00999 lb/d all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states