Median AQI
58
Moderate
New Mexico · County air quality · 2025
Bernalillo County, New Mexico
Median AQI 58 (Moderate). 26.6% of monitored days rated Good, direct from EPA Air Quality System stations.
- 58
- Median AQI
- 26.6%
- Good-air days
- 3
- Unhealthy days
- 1%
- Cleaner than US counties
Bernalillo County's 2025 annual median AQI is 58 (Moderate), with 26.6% Good days
According to the U.S. EPA Air Quality System, Bernalillo County, New Mexico posted a 2025 median AQI of 58 (Moderate) across 365 monitored days, with 26.6% rated Good and 3 unhealthy or worse. This is an annual comparison, not today's advisory.
Data source EPA Air Quality System (AQS)
- Cleaner than US
- Bernalillo County's 26.6% Good-day share places it cleaner than 1% of US counties in 2025.
- Closest median-AQI peer
- Cameron County (29.9% Good, median AQI 57) is the closest nationwide median-AQI peer to Bernalillo County.
- 2020–2025 trend
- Bernalillo County's floor-qualifying Good-day share is stable from 2020 to 2025 (28.8% → 26.6%).
- Median AQI
- Median AQI: 58
The verdict
According to EPA Air Quality System monitoring data, Bernalillo County's air is moderate on balance, among the most polluted counties nationally, a median AQI of 58 with 26.6% of 365 monitored days in the Good band, driven mainly by Ozone.
- 58
- median AQI · Moderate
- 26.6%
- days rated Good
- Ozone
- main pollutant
- 1%
- cleaner than US counties
3 days reached Unhealthy or worse; the worst single reading hit AQI 204.
Annual release change
What changed in the 2025 EPA annual release
- Bernalillo County's peak single-day AQI fell from 443 to 204 between the 2024 and 2025 EPA annual releases, a change of -239 points.
- Bernalillo County's Unhealthy-category days fell from 4 to 2 between the 2024 and 2025 EPA annual releases, a change of -2 days.
- Bernalillo County's median AQI fell from 61 to 58 between the 2024 and 2025 EPA annual releases, a change of -3 points.
Data updated August 2026
- Good · 97 d · 26.6%
- Moderate · 247 d · 67.7%
- USG · 18 d · 4.9%
- Unhealthy · 2 d · 0.5%
- Very Unhealthy · 1 d · 0.3%
How did Bernalillo County's air break down in 2025?
Across 365 monitored days, 97 fell in the Good band (AQI 0–50) and 3 reached Unhealthy or worse. The worst single day peaked at AQI 204 (Very Unhealthy).
EPA AQS →Air quality data from EPA Air Quality System (2025). 365 days monitored. Median AQI: 58 (Moderate).
Insights: Bernalillo County, New Mexico. EPA monitors recorded a median Air Quality Index of 58 across 365 measured days in 2025, earning a Moderate classification and a Poor health grade. Of those days, 97 (27%) fell in the Good band (AQI 0–50), 247 (68%) registered Moderate readings, and 18 (5%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 88, while the worst single-day peak hit 204 (Very Unhealthy). Residents averaged about 8.0 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (173 days), PM10 (85 days), PM2.5 (73 days), NO2 (34 days). Across the 2020–2025 trend window, the share of monitored days rated Good shifted by -2.1 points and the median AQI moved +1 points, placing the multi-year trajectory at stable. The annual record contains 3 days at Unhealthy or worse. On those days, the EPA recommends that sensitive groups limit prolonged outdoor exertion. Nearby counties show comparable readings: Catron (71.7% good, AQI 45); Chaves (91.9% good, AQI 29); Dona Ana (27.4% good, AQI 61); Eddy (53.7% good, AQI 49); Lea (68.8% good, AQI 44); Lincoln (68.3% good, AQI 44).
Air Quality Summary
Good Days
26.6%
97 of 365 monitored days
-48.4pp vs 75% target
Max AQI Recorded
204
Very Unhealthy
Health Grade
Poor
90th-pct AQI 88
Bernalillo County, Good days share 26.6%
National avg
Share of monitored days at AQI 0-50 (Good band).
Bernalillo County, Unhealthy-or-worse share 8.2%
National avg
Share of monitored days above AQI 150 (Unhealthy or worse). Bar maxes at 10% (worst-county ceiling).
AQI Day Breakdown (2025)
Distribution of 365 monitored days across EPA AQI categories.
Good
97
27%
Moderate
247
68%
USG
18
5%
Unhealthy
2
1%
Very Unhealthy
1
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Bernalillo County.
- Ozone · 173 days · 47.4%
- PM10 · 85 days · 23.3%
- PM2.5 · 73 days · 20.0%
- NO₂ · 34 days · 9.3%
Health Impact Assessment
Poor
Bernalillo County's air quality is rated Poor based on 26.6% good air days. There were 3 unhealthy days in 2025 when outdoor activity should be limited.
Air quality reached unhealthy levels on 3 days in 2025 (2 Unhealthy, 1 Very Unhealthy). Sensitive groups, including people with asthma, COPD, cardiovascular conditions, children, and adults over 65, should review the daily breakdown below and follow local air-quality advisories on high-AQI days.
Sensitive group advisory
People with asthma, COPD, heart disease, children, pregnant women, and adults 65+ should follow EPA AQI alerts daily and limit outdoor exertion when AQI exceeds 100. Real-time conditions: airnow.gov.
The dominant pollutant is Ozone, driving AQI on 173 of 365 monitored days.
5-Year Air Quality Trend
Air quality is stable in Bernalillo County. Highest Good-day share: 2020 (28.8%, 105 of 366 monitored days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 105 | 252 | 7 | 1 | 57 | 214 |
| 2021 | 60 | 284 | 19 | 2 | 63 | 171 |
| 2022 | 81 | 251 | 28 | 2 | 63 | 825 |
| 2023 | 97 | 264 | 3 | 0 | 59 | 207 |
| 2024 | 100 | 233 | 26 | 4 | 61 | 443 |
| 2025 | 97 | 247 | 18 | 2 | 58 | 204 |
How does Bernalillo County compare?
How Bernalillo County compares
Good-day share worse than US avg
Bernalillo County 26.6%
Cameron County, Texas 29.9%
US average 76.0%
Median AQI worse than US avg
Bernalillo County 58
Cameron County, Texas 57
US average 39
Unhealthy days / yr worse than US avg
Bernalillo County 3
Cameron County, Texas 0
US average 1
Counties with a similar median AQI
Nationwide peers within about the same annual median AQI as Bernalillo County (58), not geographic neighbors.
Cameron County, Texas
Median AQI 57 · 29.9% Good-day share
Kings County, California
Median AQI 57 · 34.5% Good-day share
Salt Lake County, Utah
Median AQI 57 · 33.1% Good-day share
Tarrant County, Texas
Median AQI 56 · 31.8% Good-day share
Butler County, Ohio
Median AQI 55 · 33.1% Good-day share
Clark County, Nevada
Median AQI 61 · 31.0% Good-day share
Same primary pollutant: Ozone
Ozone led the AQI on the most monitored days here. These peers share that driver and the closest Good-day share (a second relationship type beyond median-AQI neighbors).
Dona Ana County, New Mexico
27.4% Good-day share · median AQI 61
Imperial County, California
27.7% Good-day share · median AQI 64
Fresno County, California
28.8% Good-day share · median AQI 61
Tulare County, California
24.1% Good-day share · median AQI 64
Pima County, Arizona
33.7% Good-day share · median AQI 54
Kern County, California
17.5% Good-day share · median AQI 70
New Mexico counties on the map
Geographic containment only, other monitored counties in New Mexico, independent of AQI or pollutant match.
What Bernalillo County's air means for you
On most days the air here is fine, but Ozone drives 3 unhealthy-or-worse days a year that sensitive groups should plan around.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-Ozone days, the guide explains what a median of 58 means for exposure. Health guidance
- See how Bernalillo County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Bernalillo County with its New Mexico neighbours before drawing a conclusion about the region. All of New Mexico
Based on 365 EPA-monitored days in 2025; figures reflect only days the monitors reported. Source: EPA Air Quality System annual summaries.
Keep exploring the annual AQI record
Air-quality reading list
Frequently Asked Questions
What is the air quality in Bernalillo County, New Mexico? ▼
Bernalillo County has a median Air Quality Index (AQI) of 58, rated "Moderate." 26.6% of monitored days (97 out of 365) had good air quality in 2025.
What is the main pollutant in Bernalillo County? ▼
The primary pollutant in Bernalillo County is Ozone (O3), which was the main AQI driver on 173 days (47% of monitored days). Can trigger asthma, reduce lung function, and cause chest pain.
How many unhealthy air days does Bernalillo County have? ▼
In 2025, Bernalillo County recorded 3 unhealthy air days (2 Unhealthy, 1 Very Unhealthy, 0 Hazardous). The maximum AQI reached 204.
Is the air quality in Bernalillo County getting better or worse? ▼
Air quality in Bernalillo County is stable across floor-qualifying years (2020-2025); years with fewer than 100 monitored days are excluded from that direction. Highest qualifying Good-day share: 2020 at 28.8% (105 of 366 days). Lowest qualifying Good-day share: 2021 at 16.4% (60 of 365 days).
What does AQI 58 mean for health? ▼
Bernalillo County's median AQI of 58 falls in the "Moderate" category. See the AQI category guide for what each range means for health.
How does Bernalillo County compare to other counties in New Mexico? ▼
Bernalillo County has 26.6% good air days. Nearby counties in New Mexico: Catron (71.7% good), Chaves (91.9% good), Dona Ana (27.4% good), Eddy (53.7% good), Lea (68.8% good), Lincoln (68.3% good).
What is the 90th percentile AQI in Bernalillo County? ▼
The 90th percentile AQI for Bernalillo County is 88, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 204 (Very Unhealthy).
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by County dataset, 2020–2025 (aqs.epa.gov). For current conditions (not shown here — this page is historical annual data), see EPA AirNow (airnow.gov). See our methodology for how AQI, median, and coverage figures are computed.
Informational only, not professional advice. Data from EPA AQS. See our disclaimer. Spotted a figure that looks wrong? Report a correction.
Source: U.S. EPA Air Quality System (AQS) Annual AQI by county summary files for Bernalillo County, New Mexico · 2020–2025
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Every figure on PlainAirData is rendered directly from EPA AQS air-quality monitoring data, no number is typed in by an editor. This page draws directly on EPA AQS air-quality monitoring data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.