Costilla County W&s System
11037 Cr L.5, San Luis, CO 81152 · Costilla County · Publicly Owned Treatment Works
- Average flow
- 0.03 MGD
- Design flow
- 0.22 MGD
- NPDES permit
- CO0036528
- Administratively continued
- Permit expires
- June 2019
- Population served
- 3,485
- CWNS 2022
Costilla County W&s System is a publicly owned wastewater treatment plant in San Luis, Costilla County, Colorado treating an average of 0.03 million gallons per day against a permitted design capacity of 0.22 MGD, serving about 3,485 residents. It discharges under NPDES permit CO0036528 (administratively continued), which expires in June 2019, with 2 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Costilla County W&s System.
Available with a free Klarifi account
See the full treatment train at Costilla County W&s System: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Costilla County W&s System.
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Nearby wastewater treatment plants in Colorado
Fort Garland · 19 mi away
0.02 MGD
La Veta · 24 mi away
0.04 MGD
La Jara · 30 mi away
0.04 MGD
Antonito · 33 mi away
0.07 MGD
La Veta · 34 mi away
0.05 MGD
Cokedale · 43 mi away
—
Monte Vista · 48 mi away
0.08 MGD
Monte Vista · 49 mi away
0.46 MGD
Costilla County W&s System: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026; facility record last updated September 18, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms