County · New Mexico
San Juan County, New Mexico: drinking water records
This overview covers 16 ZIP codes and 18 community water systems in San Juan County. It also stands in for 3 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Farmington Water System NM3510224 | 47,655 | 240 | 0 | 1 | 4 ppb |
| Bloomfield Water Supply System NM3510124 | 9,536 | 120 | 0 | 13 | 2 ppb |
| Lee Hammond Water NM3500624 | 8,817 | 120 | 0 | 4 | 0.8 ppb |
| Lower Valley Water Users Association NM3510324 | 7,615 | 120 | 0 | 3 | 0.5 ppb |
| Morningstar Water System NM3510524 | 5,694 | 120 | 0 | 2 | 0 ppb |
| Flora Vista Mutual Domestic NM3510024 | 3,726 | 60 | 0 | 6 | 0 ppb |
| Aztec Domestic Water System NM3509824 | 9,673 | 120 | 0 | 0 | 0.7 ppb |
| Northstar Mdwca NM3520024 | 3,784 | 120 | 0 | 0 | 0 ppb |
| Blanco Mdwca NM3531524 | 1,148 | 0 | 0 | 4 | 0.7 ppb |
| Navajo Dam Domestic Water Consumers INC NM3536724 | 545 | 0 | 0 | 23 | 10 ppb |
| Apple Orchard Mdwca NM3511524 | 460 | 0 | 0 | 13 | 2 ppb |
| Upper la Plata Water Users Association NM3510624 | 2,265 | 0 | 0 | 0 | 0.6 ppb |
| Southside Mutual Domestic Water NM3509924 | 1,609 | 0 | 0 | 0 | 5 ppb |
| Crystal Community Boarding School BIA NN3536005 | 248 | 0 | 0 | 0 | 6.2 ppb |
| Toadlena Boarding School BIA NN3532011 | 200 | 0 | 0 | 0 | 16 ppb |
| Beclabito Day School BIA NN3532003 | 120 | 0 | 0 | 0 | 0.5 ppb |
| Nenahnezad Community School BIA NN3532006 | 80 | 0 | 0 | 0 | 0.7 ppb |
| Ngwsp Cutter Lateral NM3501124 | 0 | 0 | 0 | 0 | not reported |
ZIP reports in San Juan County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 87037, 87364, 87461.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.