Clean Water Act discharge permit · NPDES CO0000671
PORTLAND PLANT, Florence, CO: NPDES CO0000671 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 18Pollutants under a numeric limit
- 13Pollutants with an effluent exceedance
PORTLAND PLANT, held by Holcim US Inc, holds NPDES permit CO0000671, which discharges to Arkansas River. EPA’s file records it issued May 19, 2011 and expiring June 30, 2016. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | PORTLAND PLANT |
|---|---|
| Permittee as filed | Holcim US Inc |
| NPDES ID | CO0000671 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | May 19, 2011 |
| Expiration date | June 30, 2016 |
| Address | Florence, CO 81226 |
| Receiving water | ARKANSAS RIVER |
| Subwatershed | Willow Spring Creek-Arkansas River (HUC 110200020603) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 53Pollutants on file
- 18Under a numeric limit
- 50With a violation of any kind
- 13With 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 | 18 | 45 | 17 | September 30, 2025 | 1,760% over the limit |
| Nickel, total recoverable | 1 | 11 | 10 | December 31, 2022 | 38% over the limit |
| Aluminum, total recoverable | 0 | 8 | 6 | November 30, 2022 | 1,624% over the limit |
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | 0 | 7 | 5 | June 30, 2025 | 100% over the limit |
| E. coli | 8 | 5 | 5 | September 30, 2025 | 21% over the limit |
| Flow, in conduit or thru treatment plant | 24 | 40 | 4 | September 30, 2025 | 128% over the limit |
| Nitrogen, ammonia total [as N] | 0 | 4 | 4 | September 30, 2025 | 102% over the limit |
| LC50 Static Renewal 96Hr Acute Pimephales promelas | 3 | 5 | 3 | December 31, 2024 | 100% over the limit |
| pH | 14 | 16 | 2 | July 31, 2024 | |
| BOD, 5-day, 20 deg. C | 28 | 37 | 1 | August 31, 2025 | 21% over the limit |
| Coliform, fecal general | 0 | 13 | 1 | July 31, 2006 | 620% over the limit |
| Solids, suspended percent removal | 0 | 5 | 1 | July 31, 2006 | 447% over the limit |
| LC50 Static Renewal 48Hr Acute Daphnia magna | 3 | 1 | 1 | March 31, 2018 | 89% over the limit |
| Chlorine, total residual | 8 | 12 | 0 | ||
| Oil and grease | 6 | 9 | 0 | ||
| Oil and grease visual | 7 | 7 | 0 | ||
| Plant capacity fact. percent of capacity | 8 | 6 | 0 | ||
| Temperature, water deg. centigrade | 0 | 6 | 0 | ||
| BOD, 5-day, percent removal | 0 | 5 | 0 | ||
| Temperature, water deg. fahrenheit | 0 | 4 | 0 | ||
| Conductivity | 0 | 4 | 0 | ||
| Sodium adsorption ratio | 0 | 4 | 0 | ||
| Radium 226 + radium 228, total | 0 | 4 | 0 | ||
| Mercury, total [low level] | 0 | 4 | 0 | ||
| Zinc, potentially dissolved | 4 | 2 | 0 | ||
| Zinc, total recoverable | 2 | 2 | 0 | ||
| Manganese, dissolved [as Mn] | 0 | 2 | 0 | ||
| Cadmium, total recoverable | 0 | 2 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 0 | 2 | 0 | ||
| Silver, potentially dissolved | 0 | 2 | 0 | ||
| Copper, potentially dissolved | 0 | 2 | 0 | ||
| Cadmium, potentially dissolvd | 0 | 2 | 0 | ||
| Chromium, trivalent, potentially dissolvd | 0 | 2 | 0 | ||
| Lead, potentially dissolvd | 0 | 2 | 0 | ||
| Nickel, potentially dissolvd | 0 | 2 | 0 | ||
| Selenium, potentially dissolvd | 0 | 2 | 0 | ||
| Uranium, potentially dissolvd | 0 | 2 | 0 | ||
| Selenium, total recoverable | 1 | 1 | 0 | ||
| Nitrogen, inorganic total | 0 | 1 | 0 | ||
| Cyanide, weak acid, dissociable | 0 | 1 | 0 | ||
| Arsenic, total recoverable | 0 | 1 | 0 | ||
| Iron, total recoverable | 0 | 1 | 0 | ||
| Beryllium, total recoverable [as Be] | 0 | 1 | 0 | ||
| Lead, total recoverable | 0 | 1 | 0 | ||
| Copper, total recoverable | 0 | 1 | 0 | ||
| Arsenic, potentially dissolved | 0 | 1 | 0 | ||
| Chromium, trivalent total recoverable | 0 | 1 | 0 | ||
| Uranium, total | 0 | 1 | 0 | ||
| Chromium, hexavalent tot recoverable | 0 | 1 | 0 | ||
| Boron, total | 0 | 1 | 0 | ||
| Flow rate, instantaneous | 8 | 0 | 0 | ||
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | 3 | 0 | 0 | ||
| Static Renewal 7 Day Chronic Pimephales promelas | 3 | 0 | 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
- 5Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 1, 2025 | Monitoring Violations - Failure to Monitor for Toxicity Requirements | ST6 |
| May 21, 2021 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| May 21, 2021 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| May 21, 2021 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| January 1, 2018 | Effluent Violations - Failed Toxicity Test | ST6 |
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, CO0000671.
Start the watch
- One permit holder — $99/month
- 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 CO0000671 there.
Nearby on the register
- Discharge permits in Florence
- Every permit record in Florence, A to Z
- Discharge permits in Colorado
- Every permit record in Colorado, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.