New Mexico
San Juan County drinking water quality
22 active public water systems serve 104,788 people in San Juan County. 4 are compliant, 18 had at least one EPA violation in the past three years, 1 is a designated serious violator, and 5 carry a health flag.
Needs attention
Community water systems
17 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Farmington Water System Farmington |
47,655 | 2 | 0 | |
|
Aztec Domestic Water System Aztec |
9,673 | 3 | 0 | |
|
Bloomfield Water Supply System Bloomfield |
9,536 | 2 | 0 | |
|
Lee Hammond Water Bloomfield |
8,817 | 0 | 0 | |
|
Lower Valley Water Users Association Kirtland |
8,683 | 0 | 0 | |
|
Morningstar Water System Farmington |
5,694 | 2 | 0 | |
|
Northstar Mdwca Aztec |
3,784 | 4 | 0 | |
|
Flora Vista Mutual Domestic Farmington |
3,726 | 4 | 0 | |
|
Upper la Plata Water Users Association La Plata |
2,265 | 0 | 0 | |
|
Southside Mutual Domestic Water Aztec |
1,609 | 1 | 0 | |
|
Blanco Mdwca Blanco |
1,148 | 3 | 1 | |
|
Navajo Dam Domestic Water Consumers INC Navajo Dam |
545 | 4 | 1 | |
|
Apple Orchard Mdwca Bloomfield |
460 | 5 | 1 | |
|
Rosa Joint Ventures Water System Aztec |
239 | 4 | 3 | |
|
LA Vida Mission Community Water Supply Farmington |
200 | 4 | 1 | |
|
Pine River Mdca Navajo Dam |
43 | 9 | 5 | |
|
Ngwsp Cutter Lateral Ojo Encino |
0 | 2 | 0 |
Non-community systems (5: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Chaco Culture National Historic Park Nageezi |
250 | 2 | 1 | |
|
Navajo Lake State Park Pine Site Navajo Dam |
250 | 5 | 0 | |
|
Navajo Lake State Park Cottonwood Camp Navajo Dam |
158 | 5 | 1 | |
|
Enterprise Products Company Chaco Plant Bloomfield |
28 | 1 | 0 | |
|
Hydro Pure Technology Inc. Aztec |
25 | 0 | 0 |
Inactive systems (40, 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.