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Clean Water Act discharge permit · NPDES COG589157

OURAY CITY OF, Ouray County, CO: NPDES COG589157 discharge permit, effluent exceedances, inspections, penalties

OURAY CITY OF, held by Ouray City of, holds NPDES permit COG589157, which discharges to Uncompahgre River. EPA’s file records it issued February 3, 2021 and expiring September 30, 2028. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedOURAY CITY OF
Permittee as filedOuray City of
NPDES IDCOG589157
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedFebruary 3, 2021
Expiration dateSeptember 30, 2028
AddressOuray County, CO 81427
Receiving waterUncompahgre River
SubwatershedHeadwaters Uncompahgre River (HUC 140200060203)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Solids, total suspended43434October 31, 2024620% over the limit
Nitrogen, ammonia total [as N]242525September 30, 2024200% over the limit
BOD, 5-day, 20 deg. C62222June 30, 2025805% over the limit
E. coli22222October 31, 202599,999% over the limit
Solids, suspended percent removal11414October 31, 2024140% over the limit
BOD, 5-day, percent removal188September 30, 202473% over the limit
LC50 Static Renewal 96Hr Acute Pimephales promelas166December 31, 202481% over the limit
Nitrogen, inorganic total255December 31, 202355% over the limit
Copper, potentially dissolved644July 31, 202453% over the limit
Sulfide-hydrogen sulfide [undissociated]263July 31, 2026118% over the limit
Manganese, dissolved [as Mn]141September 30, 2023410% over the limit
LC50 Static Renewal 96Hr Acute Ceriodaphnia dubia111September 30, 202411% over the limit
Acrylamide250
Oil and grease140
Arsenic, total recoverable130
Chlorine, total residual220
Cadmium, potentially dissolvd700
Iron, total recoverable500
Flow, in conduit or thru treatment plant400
Solids, total dissolved300
Plant capacity fact. percent of capacity200
pH200
Oil and grease visual100

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

DateWhat EPA recordedAgency
September 23, 2025Reporting Violations - Improper/ Incorrect ReportingST6
October 1, 2023Monitoring Violations - Failure to Monitor for Toxicity RequirementsST6
April 1, 2023Monitoring Violations - Failure to Monitor for Toxicity RequirementsST6

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, COG589157.

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  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID COG589157 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.