Clean Water Act discharge permit · NPDES CO0020435
TRI-LAKES WWTF, Monument, CO: NPDES CO0020435 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 26Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
TRI-LAKES WWTF, held by Monument SD&Palmer Lake SD&Woodmoor WSD 1, holds NPDES permit CO0020435, which discharges to Monument Creek. EPA’s file records it issued November 30, 2011 and expiring December 31, 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 | TRI-LAKES WWTF |
|---|---|
| Permittee as filed | Monument SD&Palmer Lake SD&Woodmoor WSD 1 |
| NPDES ID | CO0020435 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 30, 2011 |
| Expiration date | December 31, 2016 |
| Address | Monument, CO 80132 |
| Receiving water | MONUMENT CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Upper Monument Creek (HUC 110200030102) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 42Pollutants on file
- 26Under a numeric limit
- 32With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Copper, potentially dissolved | 4 | 12 | 10 | February 29, 2008 | 49% over the limit |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | 3 | 3 | 3 | December 31, 2024 | 89% over the limit |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 5 | 1 | March 31, 2011 | 50% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 70 | 0 | ||
| Plant capacity fact. percent of capacity | 2 | 26 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 8 | 0 | ||
| Cyanide, weak acid, dissociable | 0 | 6 | 0 | ||
| Cyanide, total [as CN] | 0 | 5 | 0 | ||
| Solids, total suspended | 4 | 4 | 0 | ||
| Nonylphenol | 4 | 4 | 0 | ||
| Mercury, total [as Hg] | 2 | 4 | 0 | ||
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | 0 | 4 | 0 | ||
| %Effect Static Renewal 7Day Chronic Pimephales promelas | 0 | 4 | 0 | ||
| pH | 2 | 2 | 0 | ||
| Chlorine, total residual | 2 | 2 | 0 | ||
| Nitrogen, inorganic total | 1 | 2 | 0 | ||
| Solids, suspended percent removal | 1 | 2 | 0 | ||
| Oil and grease visual | 1 | 2 | 0 | ||
| Arsenic, total [as As] | 0 | 2 | 0 | ||
| Cadmium, total [as Cd] | 0 | 2 | 0 | ||
| Chromium, total [as Cr] | 0 | 2 | 0 | ||
| Copper, total [as Cu] | 0 | 2 | 0 | ||
| Lead, total [as Pb] | 0 | 2 | 0 | ||
| Nickel, total [as Ni] | 0 | 2 | 0 | ||
| Silver, total [as Ag] | 0 | 2 | 0 | ||
| Zinc, total [as Zn] | 0 | 2 | 0 | ||
| Selenium, total [as Se] | 0 | 2 | 0 | ||
| Phenols | 0 | 2 | 0 | ||
| Coliform, fecal general | 0 | 2 | 0 | ||
| Lead, potentially dissolvd | 2 | 1 | 0 | ||
| Oil and grease | 1 | 1 | 0 | ||
| BOD, 5-day, percent removal | 1 | 1 | 0 | ||
| Nitrogen, ammonia total [as N] | 48 | 0 | 0 | ||
| Zinc, potentially dissolved | 4 | 0 | 0 | ||
| Static Renewal 7 Day Chronic Pimephales promelas | 3 | 0 | 0 | ||
| Nitrogen, nitrate total [as N] | 2 | 0 | 0 | ||
| Manganese, dissolved [as Mn] | 2 | 0 | 0 | ||
| Selenium, potentially dissolvd | 2 | 0 | 0 | ||
| E. coli | 2 | 0 | 0 | ||
| Chloride [as Cl] | 1 | 0 | 0 | ||
| Sulfide-hydrogen sulfide [undissociated] | 1 | 0 | 0 | ||
| Sulfate | 1 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 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.
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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 CO0020435 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.