San Juan, NM
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against every other tracked county rather than against fixed national thresholds.
Environmental data for San Juan in New Mexico
San Juan, NM is tracked across three EPA datasets covering 11 Toxics Release Inventory (TRI) facilities, 16 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 53/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 17.6M lbs of reported toxic releases under EPCRA Section 313, while 8 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 48 and a peak AQI of 115 in 2024, with 60% of observed days rated "Good" (0–50).
All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.
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 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 | Population | Violations |
|---|---|---|
| FARMINGTON WATER SYSTEM | 47,655 | 0 |
| 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 | 25 |
| 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 (11)
| # | 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 | Senergy Petroleum LLC - Bloomfield Bulk Plant | 1.3K lbs |
| 9 | Raytheon Missile Systems Dine' | 0 lbs |
| 10 | Halliburton Farmington Field Camp (new) | 0 lbs |
| 11 | Pilot Thomas Logistics - Bloomfield | 0 lbs |
Cities in San Juan (4)
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.