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

According to the 2025 EPA AQS county release on PlainAirData, Bernalillo County, New Mexico ranks #937 of 951 by median AQI (58) and #941 by good-day share (26.6%). Ponce County, Puerto Rico is #1 of 951 by median AQI (3, 91.4% Good days) at good-day-share #159 ≠ largest of 7 at 100.0% Good days #1 by good-day share (100.0%, median AQI 9) at median-AQI #7.

Annual release change

What changed in the 2025 EPA annual release

2024 → 2025
  • 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.

Compared against 366 monitored days in 2024 and 365 in 2025. These are arithmetic differences between two stored EPA annual summaries, not a cause claim or a live advisory.

National release changes Two-year CSV

Data updated August 2026

Bernalillo County AQI category distribution Stacked-segment bar showing the share of monitored days that fell in each EPA AQI category, Good, Moderate, USG, Unhealthy, Very Unhealthy, Hazardous, with median AQI marker. AQI category distribution 365 monitored days G M Median AQI 58 0 50 100 150 200 300 500 Bernalillo County
  • 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 →
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).

Where Bernalillo County sits nationally

COUNT-derived placement among 951 US counties with at least 100 monitored days in 2025. Bernalillo County's Good-day share is 26.6% - cleaner than 1% of that comparison set.

Bernalillo County Good-day share vs. every US county

Share of monitored days in the Good band (AQI 0–50) - EPA AQS annual release

26.6% 1st percentile higher than 1% of 951 US counties

0.0%–5.0%: 0 US counties (0%). Below this entry. 5.0%–10.0%: 1 US counties (0%). Below this entry. 10.0%–15.0%: 4 US counties (0%). Below this entry. 15.0%–20.0%: 4 US counties (0%). Below this entry. 20.0%–25.0%: 1 US counties (0%). Below this entry. 25.0%–30.0%: 5 US counties (1%). This entry sits in this band. 30.0%–35.0%: 9 US counties (1%). Above this entry. 35.0%–40.0%: 4 US counties (0%). Above this entry. 40.0%–45.0%: 16 US counties (2%). Above this entry. 45.0%–50.0%: 16 US counties (2%). Above this entry. 50.0%–55.0%: 32 US counties (3%). Above this entry. 55.0%–60.0%: 50 US counties (5%). Above this entry. 60.0%–65.0%: 77 US counties (8%). Above this entry. 65.0%–70.0%: 93 US counties (10%). Above this entry. 70.0%–75.0%: 109 US counties (11%). Above this entry. 75.0%–80.0%: 114 US counties (12%). Above this entry. 80.0%–85.0%: 123 US counties (13%). Above this entry. 85.0%–90.0%: 99 US counties (10%). Above this entry. 90.0%–95.0%: 117 US counties (12%). Above this entry. 95.0%–100.0%: 70 US counties (7%). Above this entry. 100.0%–105.0%: 7 US counties (1%). Above this entry. This county 0.0% 100% every floor-qualified US county, bucketed by value

Each bar is a band; taller bars hold more US counties. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Environmental Protection Agency, Air Quality System (AQS) · 2025

Pollutant Breakdown

Days where each pollutant was the primary driver of AQI readings in Bernalillo County.

Bernalillo County, New Mexico criteria pollutant distribution Stratified-band visualization showing the share of monitored days each criteria pollutant (PM2.5, PM10, O3, NO2, CO) was the primary AQI driver. Ozone · 47.4% PM10 · 23.3% PM2.5 · 20.0% 0% 25% 50% 75% 100% Bernalillo County, New Mexico · 365 monitored days Criteria pollutant column
  • Ozone · 173 days · 47.4%
  • PM10 · 85 days · 23.3%
  • PM2.5 · 73 days · 20.0%
  • NO₂ · 34 days · 9.3%

2024 daily-monitor rhythm in Bernalillo County

Month-by-month median AQI from EPA day-level county monitors (366 reported days in 2024). Jul posted the highest typical readings (median AQI 97, peak 133); Mar was cleanest at median 44. Summer months (Jun–Aug) averaged median AQI 83 vs 58 in Dec–Feb. 7 days crossed Unhealthy (AQI >150) at least once that year.

0 20 40 60 80 100 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 51 51 44 56 77 68 97 84 62 63 57 71
Bernalillo County median daily AQI by calendar month (2024, EPA daily county file)

Five-year seasonal record

EPA day-level county files · 2020–2024

1,827 daily readings show a recurring local pattern: Jul has the highest matched-month median AQI (81), while Mar is lowest (47). Each cell is that month’s median daily AQI, not a current-air forecast.

JanFebMarAprMayJunJulAugSepOctNovDec
2020 534444506259585864686064
2021 625753576375876461546877
2022 656351647963906450476364
2023 688045616769715847515658
2024 515144567768978462635771

Lower AQI is better. The colors summarize EPA AQI bands; gaps mean the county had no day-level record for that month.

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
2020 105 252 7 1 57
2021 60 284 19 2 63
2022 81 251 28 2 63
2023 97 264 3 0 59
2024 100 233 26 4 61
2025 97 247 18 2 58

How does Bernalillo County compare?

How Bernalillo County compares

Good-day share worse than typical
Bernalillo County 26.6%
Cameron County, Texas 29.9%
Typical US county 76.0%
Median AQI worse than typical
Bernalillo County 58
Cameron County, Texas 57
Typical US county 39
Unhealthy days / yr worse than typical
Bernalillo County 3
Cameron County, Texas 0
Typical US county 1

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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Download this county's annual AQI row as CSV , with the same EPA fields and denominator shown on this page.

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.