The 18 largest wastewater treatment plants in New Mexico
Ranked by average flow · 18 MGD combined · 100% of the state's reported flow
City Of Farmington in Farmington is the largest publicly owned wastewater treatment plant in New Mexico by reported average flow, treating about 6.33 million gallons per day. The 18 plants below treat 18 MGD between them, 100% of the flow reported by all 31 plants in the state, and serve about 220,607 people. Every plant links to its profile with permit and compliance data. Treatment technology is shown with a free Klarifi account.
| # | Facility | City | Avg flow (MGD) | Population | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|---|
| 1 | City Of Farmington | Farmington | 6.33 | 56,746 | NM0020583 | Nov 2026 | 47 |
| 2 | Santa Fe WWTP | Santa Fe | 5.24 | 87,505 | NM0022292 | Aug 2026 | 223 |
| 3 | Sunland Park Wastewater Plant | Sunland Park | 1.1 | 16,234 | NM0029483 | Oct 2025 | 52 |
| 4 | Taos Wastewater Treatment Plant | Taos | 1.02 | 14,119 | NM0024066 | Oct 2030 | 55 |
| 5 | Silver City (city Of) - Wastewater Treatment Plant | Silver City | 0.94 | 9,705 | NM0020109 | Aug 2018 | 18 |
| 6 | Anthony Water & Sanitation Dis | Anthony | 0.91 | 8,695 | NM0029629 | Dec 2028 | 42 |
| 7 | Espanola, City Of | Espanola | 0.83 | 10,526 | NM0029351 | Feb 2028 | 13 |
| 8 | City Of Santa Rosa Wastewater | Santa Rosa | 0.3 | 2,850 | NM0024988 | Apr 2027 | 411 |
| 9 | Shiprock WWTF | Shiprock | 0.28 | 9,599 | NN0020621 | Aug 2028 | 8 |
| 10 | Rio Del Oro WW Treatment Fac. | Los Lunas | 0.24 | — | NM0030414 | Jul 2031 | 13 |
| 11 | Hatch, Village Of | Hatch | 0.17 | 1,539 | NM0020010 | Mar 2031 | 0 |
| 12 | Eastern Nm Rural Water System | Albuquerque Xxxx | 0.17 | — | NM0031235 | Oct 2030 | 1 |
| 13 | Village Of Chama | Chama | 0.08 | 917 | NM0027731 | Feb 2028 | 170 |
| 14 | Jemez Springs, Village Of | Jemez Springs | 0.07 | 198 | NM0028011 | Jul 2031 | 96 |
| 15 | The Village Of Angelfire, WWTP | Angel Fire | 0.04 | 1,192 | NM0030503 | Jun 2028 | 0 |
| 16 | Reserve, Village Of | Reserve | 0.03 | 293 | NM0024163 | Oct 2030 | 113 |
| 17 | Town Of Red River | Taos | 0.02 | 489 | NM0024899 | Jun 2027 | 23 |
| 18 | Northern Edge Casino | Fruitland | 0.01 | — | NN0030343 | Nov 2027 | 5 |
Treatment technology for each plant is shown with a free Klarifi account. Create one →
Largest plants in New Mexico: 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.
Wastewater terms: WWTP · POTW · MGD · NPDES permit · Oxidation ditch · Anaerobic digester · all terms
Cite this page
Journalists, researchers and educators are welcome to quote these figures. Please credit Klarifi as the source and link to this page.
Klarifi. “Largest wastewater treatment plants in New Mexico (2026).” Updated October 26, 2026. https://klarifi.io/facilities/new-mexico/largestNeed a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.