San Juan, NM
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for San Juan in New Mexico · Population: 121,178
TRI sites such as Four Corners Steam Electric Station; San Juan Generating Station; Westmoreland San Juan Mining LLC - San Juan Mine; SDWIS systems such as FARMINGTON WATER SYSTEM; AZTEC DOMESTIC WATER SYSTEM; BLOOMFIELD WATER SUPPLY SYSTEM; NPL sites such as Lee Acres Landfill (USDOI) anchor San Juan, NM's EPA extract. Derived burden score 59/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in San Juan include FARMINGTON WATER SYSTEM; BLOOMFIELD WATER SUPPLY SYSTEM; LEE HAMMOND WATER, while Four Corners Steam Electric Station leads reported TRI pounds among local Form R filers. AQS median AQI 48 / peak 115 in 2024.
Burden score 59/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for San Juan -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for San Juan, NM: EPA TRI 2023 reporting year
Same facilities, both years
-45.2%
7 facilities that filed in 2022 and 2023
Whole inventory
-56.7%
4.3 million lb → 1.9 million lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- San Juan, NM's total reported releases fell from 3.4 million lb in 2022 to 1.9 million lb in 2023, based on EPA TRI filings.
- San Juan, NM's water releases fell from 1.4 thousand lb in 2022 to 65 lb in 2023, based on EPA TRI filings.
- San Juan, NM's land releases fell from 3.0 million lb in 2022 to 1.5 million lb in 2023, based on EPA TRI filings.
- San Juan, NM's off-site transfers fell from 229.9 thousand lb in 2022 to 181.2 thousand lb in 2023, based on EPA TRI filings.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 218 (60%) | 137 | 11 | 115 |
| 2023 | 249 (68%) | 112 | 4 | 117 |
| 2022 | 238 (65%) | 116 | 9 | 220 |
| 2021 | 237 (65%) | 120 | 8 | 126 |
| 2020 | 265 (72%) | 96 | 5 | 109 |
Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in New Mexico, see the EPA's AirNow.gov.
Water Systems (16)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| FARMINGTON WATER SYSTEM | 47,655 | 1 |
| AZTEC DOMESTIC WATER SYSTEM | 9,673 | 0 |
| BLOOMFIELD WATER SUPPLY SYSTEM | 9,536 | 40 |
| LEE HAMMOND WATER | 8,817 | 12 |
| LOWER VALLEY WATER USERS ASSOCIATION | 7,615 | 3 |
| BOSQUE FARMS WATER SUPPLY SYSTEM | 4,367 | 26 |
| NORTHSTAR MDWCA | 3,784 | 0 |
| FLORA VISTA MUTUAL DOMESTIC | 3,726 | 11 |
| UPPER LA PLATA WATER USERS ASSOCIATION | 2,265 | 0 |
| SOUTHSIDE MUTUAL DOMESTIC WATER | 1,609 | 0 |
| NAVAJO DAM DOMESTIC WATER CONSUMERS INC | 545 | 80 |
| APPLE ORCHARD MDWCA | 460 | 30 |
| Toadlena Boarding School BIA | 200 | 0 |
| LYBROOK MDWCA | 175 | 16 |
| Nenahnezad Community School BIA | 80 | 0 |
| NGWSP CUTTER LATERAL | 0 | 0 |
TRI Facilities (13)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Four Corners Steam Electric Station | 8.3M lbs |
| 2 | San Juan Generating Station | 5.0M lbs |
| 3 | Westmoreland San Juan Mining LLC - San Juan Mine | 3.6M lbs |
| 4 | Chaco Gas Plant | 499.8K lbs |
| 5 | Western Refining - Bloomfield | 141.0K lbs |
| 6 | San Juan Gas Plant | 71.8K lbs |
| 7 | Coastal Chemical Co., LLC | 6.7K lbs |
| 8 | Championx - Aztec | 1.7K lbs |
| 9 | Senergy Petroleum LLC - Bloomfield Bulk Plant | 1.3K lbs |
| 10 | Raytheon Missile Systems Dine' | 0 lbs |
| 11 | Halliburton Farmington Field Camp (new) | 0 lbs |
| 12 | Pilot Thomas Logistics - Bloomfield | 0 lbs |
| 13 | Ethosenergy Generator Services | 0 lbs |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Lee Acres Landfill (USDOI) | NPL Site | 39.37 |
Cities in San Juan (11)
Frequently Asked Questions
What is the environmental risk level in San Juan, New Mexico? ▼
Are there Superfund sites in San Juan? ▼
How many toxic release facilities are in San Juan? ▼
What is the air quality in San Juan? ▼
Is the drinking water safe in San Juan? ▼
What environmental agencies cover San Juan? ▼
What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.