San Juan, New Mexico Air Quality
San Juan County, New Mexico (NM)
→ Stableover 10 years
10-Year AQI Trend
The solid line shows the median AQI each year. The dashed line shows the 90th percentile (worst 10% of days).
Air Quality Day Breakdown
Number of days per year in each EPA AQI category. Green = Good (AQI 0-50), Yellow = Moderate (51-100), Orange = Unhealthy for Sensitive Groups (101-150), Red = Unhealthy or worse (151+).
Year-by-Year Data
| Year | Median AQI | 90th Pct | Max AQI | Good Days | Moderate | Unhealthy+ | Pollutant |
|---|---|---|---|---|---|---|---|
| 2023 | 46 | 74 | 117 | 249 | 112 | 4 | Ozone |
| 2022 | 45 | 77 | 220 | 238 | 116 | 11 | Ozone |
| 2021 | 46 | 77 | 126 | 237 | 120 | 8 | Ozone |
| 2020 | 45 | 64 | 109 | 265 | 96 | 5 | Ozone |
| 2019 | 49 | 90 | 97 | 208 | 157 | 0 | Ozone |
| 2018 | 47 | 93 | 129 | 213 | 136 | 16 | Ozone |
| 2017 | 47 | 80 | 133 | 230 | 129 | 6 | Ozone |
| 2016 | 44 | 71 | 108 | 273 | 91 | 2 | Ozone |
| 2015 | 44 | 67 | 115 | 263 | 100 | 2 | Ozone |
| 2014 | 44 | 61 | 97 | 272 | 93 | 0 | Ozone |
What This Means for San Juan County Residents
San Juan, New Mexico has received an Air Quality Grade of C (59/100) based on a decade of monitoring data from the EPA's air quality monitoring program. The current median AQI of 46 falls in the "Good" range.
The primary pollutant affecting this area is Ground-Level Ozone. Over the past 5 years, this area has averaged 6 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity. The American Lung Association's State of the Air report provides additional context on long-term health risks from air pollution exposure.
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Frequently Asked Questions
San Juan, New Mexico has a current median AQI of 46, which falls in the "Good" range. The area has received an Air Quality Grade of C (59/100) based on 10 years of EPA monitoring data.
Air quality in San Juan, New Mexico is stable over the past decade. The median AQI has changed by +2 points from 2014 to 2023.
San Juan, New Mexico averages 6 unhealthy air quality days per year over the past 5 years. On these days, sensitive groups including children, the elderly, and those with respiratory conditions should limit outdoor activity.
The primary pollutant affecting San Juan, New Mexico is Ground-Level Ozone. This is the dominant contributor to elevated AQI readings in the San Juan County area.
San Juan, New Mexico averages 6 unhealthy air days per year. Asthma patients should monitor daily AQI readings and limit outdoor activity when AQI exceeds 100. The primary pollutant is Ground-Level Ozone, which is a known asthma trigger.
With a median AQI of 46 (Good), outdoor exercise in San Juan, New Mexico is generally safe year-round. San Juan, New Mexico averages 6 days per year when athletes should move workouts indoors.