Ouray City of

NPDES permit CO0048983 · Minor NON-POTW · administratively continued, expires 2023-03-31 · 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 2023-03-31 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

2values over a limit
13required values missing, on 3 form(s)
17of 41 forms filed late

Last period with anything received: 2026-07-31. Most often over: pH (2).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (98)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMX WK AV report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedMX 7D AV <= 45 mg/L all year
001Arsenic, total recoverable30DA AVG report only all year
001Iron, total recoverable30DA AVG <= 3050 ug/L Jan, Feb, Mar, Nov, Dec
001Iron, total recoverable30DA AVG <= 3050 ug/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Iron, total recoverable30DA AVG <= 16.4 lb/d Jan, Feb, Mar, Nov, Dec
001Iron, total recoverable30DA AVG <= 17.8 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
001Iron, dissolved [as Fe]30DA AVG <= 3020 ug/L all year
001Nickel, total recoverable30DA AVG report only all year
001Cadmium, total recoverable30DA AVG report only all year
001Cadmium, total recoverableDAILY MX report only all year
001Lead, total recoverable30DA AVG report only all year
001Lead, total recoverableDAILY MX report only all year
001Molybdenum, total recoverable30DA AVG report only all year
001Molybdenum, total recoverableDAILY MX report only all year
001Chromium, hexavalent dissolved [as Cr]30DA AVG report only all year
001Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
001Zinc, potentially dissolved30DA AVG report only all year
001Zinc, potentially dissolvedDAILY MX report only all year
001Silver, potentially dissolved30DA AVG report only all year
001Silver, potentially dissolvedDAILY MX report only all year
001Copper, potentially dissolved30DA AVG report only Jan, Feb, Mar, Nov, Dec
001Copper, potentially dissolved30DA AVG report only Apr, May, Jun, Jul, Aug, Sep, Oct
001Copper, potentially dissolvedDAILY MX report only Jan, Feb, Mar, Nov, Dec
001Copper, potentially dissolvedDAILY MX report only Apr, May, Jun, Jul, Aug, Sep, Oct
001Copper, potentially dissolved30DA AVG <= .3 lb/d Jan, Feb, Mar, Nov, Dec
001Copper, potentially dissolved30DA AVG <= .4 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
001Copper, potentially dissolvedROLL AVG report only all year
001Arsenic, potentially dissolved30DA AVG report only all year
001Arsenic, potentially dissolvedDAILY MX report only all year
001Cadmium, potentially dissolvd30DA AVG report only Jan, Feb, Mar, Nov, Dec
001Cadmium, potentially dissolvd30DA AVG report only Apr, May, Jun, Jul, Aug, Sep, Oct
001Cadmium, potentially dissolvdDAILY MX report only Jan, Feb, Mar, Nov, Dec
001Cadmium, potentially dissolvdDAILY MX report only Apr, May, Jun, Jul, Aug, Sep, Oct
001Cadmium, potentially dissolvd30DA AVG <= .116 lb/d Jan, Feb, Mar, Nov, Dec
001Cadmium, potentially dissolvd30DA AVG <= .125 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
001Cadmium, potentially dissolvdROLL AVG report only all year
001Lead, potentially dissolvd30DA AVG report only all year
001Lead, potentially dissolvdDAILY MX report only all year
001Manganese, potentially dissolvd30DA AVG report only all year
001Manganese, potentially dissolvdDAILY MX report only all year
001Nickel, potentially dissolvd30DA AVG report only all year
001Nickel, potentially dissolvdDAILY MX report only all year
001Selenium, potentially dissolvd30DA AVG report only all year
001Selenium, potentially dissolvdDAILY MX report only all year
001Oil and greaseINST MAX <= 10 mg/L all year
001Chromium, trivalent total recoverableDAILY MX report only all year
001Flow, in conduit or thru treatment plant30DA AVG <= 1 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residual30DA AVG <= .17 mg/L all year
001Chlorine, total residual30DA AVG <= .14 mg/L all year
001Chlorine, total residualINST MAX <= .3 mg/L all year
001Chlorine, total residualINST MAX <= .21 mg/L all year
001E. coli30DA AVG report only all year
001E. coliDAILY MX report only all year
001Sulfide-hydrogen sulfide [undissociated]30DA AVG report only all year
001Solids, total dissolved30DA AVG report only all year
001Solids, total dissolvedDAILY MX report only all year
001Mercury, total [as Hg]30DA AVG report only all year
001Oil and grease visualINST MAX report only all year
001LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaMN VALUE report only all year
001LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaMN VALUE >= 100 % all year
001LC50 Static Renewal 96Hr Acute Pimephales promelasMN VALUE report only all year
001LC50 Static Renewal 96Hr Acute Pimephales promelasMN VALUE >= 100 % all year
002Arsenic, total recoverable30DA AVG report only all year
002Iron, total recoverable30DA AVG report only all year
002Iron, dissolved [as Fe]30DA AVG report only all year
002Cadmium, total recoverable30DA AVG report only all year
002Cadmium, total recoverableDAILY MX report only all year
002Lead, total recoverableDAILY MX report only all year
002Chromium, hexavalent dissolved [as Cr]30DA AVG report only all year
002Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
002Zinc, potentially dissolved30DA AVG report only all year
002Zinc, potentially dissolvedDAILY MX report only all year
002Silver, potentially dissolved30DA AVG report only all year
002Silver, potentially dissolvedDAILY MX report only all year
002Copper, potentially dissolved30DA AVG report only all year
002Copper, potentially dissolvedDAILY MX report only all year
002Arsenic, potentially dissolved30DA AVG report only all year
002Arsenic, potentially dissolvedDAILY MX report only all year
002Cadmium, potentially dissolvd30DA AVG report only all year
002Cadmium, potentially dissolvdDAILY MX report only all year
002Lead, potentially dissolvd30DA AVG report only all year
002Lead, potentially dissolvdDAILY MX report only all year
002Nickel, potentially dissolvd30DA AVG report only all year
002Nickel, potentially dissolvdDAILY MX report only all year
002Selenium, potentially dissolvd30DA AVG report only all year
002Selenium, potentially dissolvdDAILY MX report only all year
002Chromium, trivalent total recoverable30DA AVG report only all year
002Chromium, trivalent total recoverableDAILY MX report only all year
002Sulfide-hydrogen sulfide [undissociated]30DA AVG report only all year
002Mercury, total [as Hg]30DA AVG report only all year
USTTemperature, water deg. centigradeMX WK AV report only all year
USTTemperature, water deg. centigradeDAILY MX report only 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