Clean Water Act discharge permit · NPDES COX631078
CHATEAU CHAPARRAL WWTF, Nathrop (Historical), CO: NPDES COX631078 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 14Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
CHATEAU CHAPARRAL WWTF, held by Chateau Chaparral Owner Association, holds NPDES permit COX631078, which discharges to Groundwater. EPA’s file records it issued February 2, 2018 and expiring June 30, 2020. 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 | CHATEAU CHAPARRAL WWTF |
|---|---|
| Permittee as filed | Chateau Chaparral Owner Association |
| NPDES ID | COX631078 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | February 2, 2018 |
| Expiration date | June 30, 2020 |
| Address | Nathrop (Historical), CO 81236 |
| Receiving water | groundwater |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Outlet Chalk Creek (HUC 110200010502) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 14Pollutants on file
- 14Under a numeric limit
- 14With 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.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total dissolved | 1 | 8 | 3 | October 31, 2020 | 52% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 21 | 1 | December 31, 2018 | 1,789% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 20 | 0 | ||
| Solids, total suspended | 4 | 15 | 0 | ||
| Plant capacity fact. percent of capacity | 2 | 12 | 0 | ||
| pH | 2 | 10 | 0 | ||
| Oil and grease | 2 | 10 | 0 | ||
| Coliform, total general | 2 | 10 | 0 | ||
| Nitrogen, inorganic total | 1 | 5 | 0 | ||
| Chloride [as Cl] | 1 | 5 | 0 | ||
| Sulfate, total [as SO4] | 1 | 5 | 0 | ||
| BOD, 5-day, percent removal | 1 | 5 | 0 | ||
| Solids, suspended percent removal | 1 | 5 | 0 | ||
| Oil and grease visual | 1 | 5 | 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 COX631078.
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, COX631078.
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 COX631078 there.
Nearby on the register
- Discharge permits in Nathrop (Historical)
- Every permit record in Nathrop (Historical), A to Z
- Discharge permits in Colorado
- Every permit record in Colorado, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.