New Mexico
Rio Arriba County drinking water quality
62 active public water systems serve 29,214 people in Rio Arriba County. 2 are compliant, 60 had at least one EPA violation in the past three years, 5 are designated serious violators, and 22 carry a health flag.
Active systems
62
41 community systems
People served
29K
by public water systems
Systems with violations
60
97% of active systems, past 3 years
Serious violators
5
22 systems carry a health flag
Needs attention
Ensenada Mdwca
NM3501821 · Tierra Amarilla · Community water system · Serves 300
4 rules violated in the past three years. Unresolved: Consumer Confidence Rule (CCR) and Groundwater Rule (GWR).
Gallina Water System
NM3502021 · Gallina · Community water system · Serves 99
3 rules violated in the past three years. Unresolved: Consumer Confidence Rule (CCR), Groundwater Rule (GWR), and Public Notification Rule.
Delancey Street Foundation
NM3511021 · Alcalde · Community water system · Serves 83
4 rules violated in the past three years. Unresolved: Groundwater Rule (GWR), Lead and Copper Rule (LCR), and Lead and Copper Rule Revisions (LCRR).
Rio Arriba County Velarde Treatment Fac.
NM3510221 · Non-Transient non-community system · Serves 50
4 rules violated in the past three years. Unresolved: Groundwater Rule (GWR), Lead and Copper Rule (LCR), Lead and Copper Rule Revisions (LCRR), and Public Notification Rule.
Youngsville Mdwca
NM3503721 · Youngsville · Community water system · Serves 45
5 rules violated in the past three years. Unresolved: Consumer Confidence Rule (CCR), Groundwater Rule (GWR), Lead and Copper Rule (LCR), Public Notification Rule, and Revised Total Coliform Rule (RTCR).
Truchas Mdwca
NM3503421 · Truchas · Community water system · Serves 629
4 rules violated in the past three years. Unresolved: Groundwater Rule (GWR), Lead and Copper Rule (LCR), and Public Notification Rule.
Tierra Amarilla Mdwca
NM3503321 · Tierra Amarilla · Community water system · Serves 340
4 rules violated in the past three years. Unresolved: Consumer Confidence Rule (CCR) and Lead and Copper Rule Revisions (LCRR).
Rutheron Mutual Water Association
NM3502221 · Los Ojos, Rutheron · Community water system · Serves 239
5 rules violated in the past three years. Unresolved: Consumer Confidence Rule (CCR), Lead and Copper Rule Revisions (LCRR), and Public Notification Rule.
Los Ojos Mdwca
NM3502921 · Los Ojos · Community water system · Serves 237
5 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR) and Public Notification Rule.
Capulin Mdwca
NM3500821 · Capulin · Community water system · Serves 215
4 rules violated in the past three years. Unresolved: Groundwater Rule (GWR).
12 more systems with a serious violator or health flag designation are in the lists below.
Community water systems
41 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Espanola Water System Espanola |
12,012 | 3 | 1 | |
|
Chama Water System Chama |
1,573 | 6 | 1 | |
|
Agua Sana Wua Hernandez |
1,514 | 5 | 1 | |
|
EL Rito Regional Water & Waste Water Asn El Rito |
1,200 | 0 | 0 | |
|
Greater Chimayo Mdwca Chimayo |
1,050 | 3 | 0 | |
|
Alcalde Mdwca Alcalde |
927 | 2 | 0 | |
|
Chamita Mdwca Chamita |
902 | 6 | 1 | |
|
Truchas Mdwca Truchas |
629 | 4 | 1 | |
|
Velarde Mdwca Velarde |
543 | 1 | 0 | |
|
Dixon Mdwca Dixon |
500 | 3 | 0 | |
|
Canjilon Water System Canjilon |
469 | 2 | 0 | |
|
Abiquiu Mdwca Abiquiu |
424 | 3 | 1 | |
|
Cebolla Mdwca Cebolla |
350 | 5 | 1 | |
|
Tierra Amarilla Mdwca Tierra Amarilla |
340 | 4 | 2 | |
|
Cordova Mdwca Cordova |
325 | 7 | 2 | |
|
EL Rito Canyon Mdwca El Rito |
300 | 1 | 1 | |
|
Ensenada Mdwca Tierra Amarilla |
300 | 4 | 2 | |
|
Coronado High School Gallina |
263 | 5 | 2 | |
|
Rutheron Mutual Water Association Los Ojos, Rutheron |
239 | 5 | 1 | |
|
Los Ojos Mdwca Los Ojos |
237 | 5 | 1 | |
|
Ojo Sarco Mdwca Ojo Sarco |
225 | 2 | 0 | |
|
Lumberton Mdwca Lumberton |
223 | 7 | 1 | |
|
Capulin Mdwca Capulin |
215 | 4 | 1 | |
|
Valley Estates Water & Sewer Association Espanola |
194 | 2 | 1 | |
|
Lybrook Mdwca Nageezi |
175 | 3 | 1 | |
|
Rio Embudo Mdwca Dixon |
159 | 4 | 2 | |
|
Canones Mdwca Canones |
150 | 3 | 1 | |
|
Apodaca Mdwca Dixon |
129 | 4 | 1 | |
|
LA Madera Mdwca La Madera |
124 | 3 | 2 | |
|
Gallina Water System Gallina |
99 | 3 | 3 | |
|
Chama West Water Users Association Chama |
90 | 3 | 0 | |
|
Barranco Mdwca Abiquiu |
89 | 3 | 0 | |
|
Lindrith Community Water Coop INC Lindrith |
85 | 4 | 2 | |
|
Vallecitos Mdwca Vallecitos |
84 | 1 | 0 | |
|
Delancey Street Foundation Alcalde |
83 | 4 | 3 | |
|
Coyote Mdwca Coyote |
77 | 2 | 0 | |
|
LA Asociacion de Agua de los Brazos Los Ojos |
64 | 5 | 1 | |
|
Ancones Mdwwca La Madera |
60 | 3 | 1 | |
|
Canon Plaza Mdwca Vallecitos |
60 | 3 | 2 | |
|
Youngsville Mdwca Youngsville |
45 | 5 | 3 | |
|
Pinon Ridge Wua Rutheron |
29 | 0 | 0 |
Non-community systems (21: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Brazos Mdwca Chama |
360 | 1 | 0 | |
|
Bpoe 1747 Recreation Area Navajo Dam |
357 | 3 | 1 | |
|
Escalante High School Tierra Amarilla |
225 | 1 | 0 | |
|
Echo Amphitheater Usfs Carson |
205 | 1 | 1 | |
|
Abiquiu Inn Abiquiu |
191 | 2 | 1 | |
|
Ghost Ranch Conference Center Abiquiu |
150 | 4 | 1 | |
|
Heron Lake State Park (surface Water) Rutheron |
150 | 4 | 0 | |
|
Rio Arriba County Detention Center Tierra Amarilla |
128 | 3 | 1 | |
|
Abiquiu Elementary School Abiquiu |
125 | 4 | 2 | |
|
Navajo Lake State Park Sims Mesa Navajo Dam |
110 | 5 | 0 | |
|
Abiquiu Dam Abiquiu |
100 | 1 | 1 | |
|
Chimayo Elementary School Chimayo |
100 | 2 | 1 | |
|
EL Vado Lake State Park Rutheron |
100 | 4 | 1 | |
|
McCurdy School Espanola |
62 | 1 | 1 | |
|
Corkins Lodge Chama |
60 | 2 | 1 | |
|
Pilar Yacht Club & Cafe Embudo |
50 | 2 | 0 | |
|
Rio Arriba County Velarde Treatment Fac. |
50 | 4 | 2 | |
|
Coyote Admin Site Usfs Snf Coyote |
42 | 1 | 1 | |
|
Stonehouse Lodge Rutheron |
35 | 3 | 1 | |
|
Hopewell Lake Campground Usfs Carson Taos |
30 | 1 | 0 | |
|
Mesa Shopping Center Espanola |
28 | 5 | 1 |
Inactive systems (66, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The New Mexico records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.