Clean Water Act discharge permit · NPDES COR900901
ENVIRONMENTAL STONEWORKS, Denver, CO: NPDES COR900901 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 2Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
ENVIRONMENTAL STONEWORKS, held by Environmental Materials LLC, holds NPDES permit COR900901, which discharges to Sand Creek -South Platte River. EPA’s file records it issued June 19, 2012 and expiring June 30, 2017. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | ENVIRONMENTAL STONEWORKS |
|---|---|
| Permittee as filed | Environmental Materials LLC |
| NPDES ID | COR900901 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | June 19, 2012 |
| Expiration date | June 30, 2017 |
| Address | Denver, CO 80216 |
| Receiving water | Sand Creek -South Platte River |
| Subwatershed | Sand Creek (HUC 101900030204) |
| SIC | 3272 – Concrete Products |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 4Pollutants on file
- 2Under a numeric limit
- 4With a violation of any kind
- 0With 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.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 1 | 10 | 0 | ||
| Iron, total [as Fe] | 1 | 8 | 0 | ||
| pH | 0 | 4 | 0 | ||
| Iron, total recoverable | 0 | 1 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES COR900901.
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 COR900901.
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
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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 COR900901 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.