Dona Ana County South West Regional WWTP
La Mesa, NM · Dona Ana County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 1.05 MGD
- NPDES permit
- NM0030490
- Effective
- Permit expires
- May 2030
- Population served
- 26,197
- CWNS 2022
Dona Ana County South West Regional WWTP is a publicly owned wastewater treatment works in La Mesa, Dona Ana County, New Mexico, serving about 26,197 residents. It discharges under NPDES permit NM0030490 (effective), which expires in May 2030, with 69 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 69
- Effluent violations
- 18
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Dona Ana County South West Regional WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in New Mexico
Anthony · 6 mi away
1.1 MGD
Las Cruces · 17 mi away
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Sunland Park · 21 mi away
1.2 MGD
Hatch · 49 mi away
0.25 MGD
Silver City · 102 mi away
1.02 MGD
Socorro · 137 mi away
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Artesia · 144 mi away
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Belen · 176 mi away
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Dona Ana County South West Regional WWTP: 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 September 11, 2026; facility record last updated May 21, 2025.