Clean Water Act discharge permit · NPDES COG318093
929 PEARL ST DEWATERING SYSTEM, Boulder, CO: NPDES COG318093 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 113Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
929 PEARL ST DEWATERING SYSTEM, held by West Pearl LLC, holds NPDES permit COG318093, which discharges to Boulder Creek. EPA’s file records it issued July 19, 2021 and expiring May 31, 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 filed | 929 PEARL ST DEWATERING SYSTEM |
|---|---|
| Permittee as filed | West Pearl LLC |
| NPDES ID | COG318093 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | July 19, 2021 |
| Expiration date | May 31, 2028 |
| Address | Boulder, CO 80302 |
| Receiving water | Boulder Creek |
| Subwatershed | City of Boulder-Boulder Creek (HUC 101900050406) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 113Pollutants on file
- 113Under a numeric limit
- 113With a violation of any kind
- 2With an effluent exceedance
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; the 60 with the most exceedances of 113 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 2 | 22 | 14 | July 31, 2026 | 83% over the limit |
| Solids, total suspended | 2 | 10 | 2 | May 31, 2023 | 116% over the limit |
| Manganese, dissolved [as Mn] | 4 | 8 | 0 | ||
| pH | 2 | 8 | 0 | ||
| Arsenic, total recoverable | 2 | 4 | 0 | ||
| Iron, total recoverable | 2 | 4 | 0 | ||
| Selenium, total recoverable | 2 | 4 | 0 | ||
| Thallium, total recoverable | 2 | 4 | 0 | ||
| Beryllium, total recoverable [as Be] | 2 | 4 | 0 | ||
| Barium, total recoverable | 2 | 4 | 0 | ||
| Iron, dissolved [as Fe] | 2 | 4 | 0 | ||
| Nickel, total recoverable | 2 | 4 | 0 | ||
| Silver total recoverable | 2 | 4 | 0 | ||
| Zinc, total recoverable | 2 | 4 | 0 | ||
| Aluminum, total recoverable | 2 | 4 | 0 | ||
| Cadmium, total recoverable | 2 | 4 | 0 | ||
| Lead, total recoverable | 2 | 4 | 0 | ||
| Chromium, total recoverable | 2 | 4 | 0 | ||
| Copper, total recoverable | 2 | 4 | 0 | ||
| Molybdenum, total recoverable | 2 | 4 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 2 | 4 | 0 | ||
| Antimony, total recoverable | 2 | 4 | 0 | ||
| Zinc, potentially dissolved | 2 | 4 | 0 | ||
| Silver, potentially dissolved | 2 | 4 | 0 | ||
| Copper, potentially dissolved | 2 | 4 | 0 | ||
| Arsenic, potentially dissolved | 2 | 4 | 0 | ||
| Cadmium, potentially dissolvd | 2 | 4 | 0 | ||
| Chromium, trivalent, potentially dissolvd | 2 | 4 | 0 | ||
| Lead, potentially dissolvd | 2 | 4 | 0 | ||
| Manganese, potentially dissolvd | 2 | 4 | 0 | ||
| Nickel, potentially dissolvd | 2 | 4 | 0 | ||
| Selenium, potentially dissolvd | 2 | 4 | 0 | ||
| Thallium, potentially dissolvd | 2 | 4 | 0 | ||
| Uranium, potentially dissolvd | 2 | 4 | 0 | ||
| Total phenols | 2 | 4 | 0 | ||
| Chromium, trivalent total recoverable | 2 | 4 | 0 | ||
| Uranium, total | 2 | 4 | 0 | ||
| Carbon tetrachloride | 2 | 4 | 0 | ||
| 1,2-Dichloroethane | 2 | 4 | 0 | ||
| Bromoform | 2 | 4 | 0 | ||
| Chloroform | 2 | 4 | 0 | ||
| Toluene | 2 | 4 | 0 | ||
| Benzene | 2 | 4 | 0 | ||
| Acenaphthene | 2 | 4 | 0 | ||
| Acrolein | 2 | 4 | 0 | ||
| Anthracene | 2 | 4 | 0 | ||
| Benzo[k]fluoranthene | 2 | 4 | 0 | ||
| Benzo[a]pyrene | 2 | 4 | 0 | ||
| Bis[2-chloroethyl] ether | 2 | 4 | 0 | ||
| Bis[2-chloroisopropyl] ether | 2 | 4 | 0 | ||
| Butyl benzyl phthalate | 2 | 4 | 0 | ||
| Chlorobenzene | 2 | 4 | 0 | ||
| Chlorodibromomethane | 2 | 4 | 0 | ||
| Chrysene | 2 | 4 | 0 | ||
| Diethyl phthalate | 2 | 4 | 0 | ||
| Dimethyl phthalate | 2 | 4 | 0 | ||
| 1,2-Diphenylhydrazine | 2 | 4 | 0 | ||
| Fluoranthene | 2 | 4 | 0 | ||
| Fluorene | 2 | 4 | 0 | ||
| Hexachlorocyclopentadiene | 2 | 4 | 0 |
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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES COG318093.
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.
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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 COG318093 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.