Median AQI
19
Good
New Mexico · County air quality · 2025
Luna County, New Mexico
Median AQI 19 (Good). 79.5% of monitored days rated Good, direct from EPA Air Quality System stations.
- 19
- Median AQI
- 79.5%
- Good-air days
- 9
- Unhealthy days
- 50%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Luna County's air is good on balance, cleaner than the median US county, a median AQI of 19 with 79.5% of 268 monitored days in the Good band, driven mainly by PM10.
- 19
- median AQI · Good
- 79.5%
- days rated Good
- PM10
- main pollutant
- 50%
- cleaner than US counties
9 days reached Unhealthy or worse; the worst single reading hit AQI 321.
Data updated July 2026
- Good · 213 d · 79.5%
- Moderate · 37 d · 13.8%
- USG · 9 d · 3.4%
- Unhealthy · 7 d · 2.6%
- Very Unhealthy · 1 d · 0.4%
- Hazardous · 1 d · 0.4%
How did Luna County's air break down in 2025?
Across 268 monitored days, 213 fell in the Good band (AQI 0–50) and 9 reached Unhealthy or worse. The worst single day peaked at AQI 321 (Hazardous).
EPA AQS →Air quality data from EPA Air Quality System (2025). 268 days monitored. Median AQI: 19 (Good).
Insights: Luna County, New Mexico. EPA monitors recorded a median Air Quality Index of 19 across 268 measured days in 2025, earning a Good classification and a Good health grade. Of those days, 213 (79%) fell in the Good band (AQI 0–50), 37 (14%) registered Moderate readings, and 9 (3%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 82, while the worst single-day peak hit 321 (Hazardous). Residents averaged about 23.8 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM10 (268 days). Across the 2020–2025 trend window, good days shifted by -122 and the median AQI moved +0 points, placing the multi-year trajectory at worsening. Residents and visitors experienced 9 unhealthy-or-worse days combined, periods when the EPA recommends sensitive groups limit prolonged outdoor exertion. Nearby counties show comparable readings: Bernalillo (23.7% good, AQI 59); Catron (100.0% good, AQI 8); Chaves (94.4% good, AQI 16); Dona Ana (19.4% good, AQI 70); Eddy (46.9% good, AQI 51); Lea (61.5% good, AQI 47).
Air Quality Summary
Good Days
79.5%
213 of 268 monitored days
4.5pp vs 75% target
Max AQI Recorded
321
Hazardous
Health Grade
Good
90th-pct AQI 82
Luna County, Good days share 79.5%
National avg
Share of monitored days at AQI 0-50 (Good band).
Luna County, Unhealthy-or-worse share 3.4%
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 268 monitored days across EPA AQI categories.
Good
213
79%
Moderate
37
14%
USG
9
3%
Unhealthy
7
3%
Very Unhealthy
1
0%
Hazardous
1
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Luna County.
- PM10 · 268 days · 100.0%
Health Impact Assessment
Good
Luna County's air quality is rated Good based on 79.5% good air days. There were 9 unhealthy days in 2025 when outdoor activity should be limited.
Air quality posed significant health risk in 2025. Sensitive groups, including people with asthma, COPD, cardiovascular conditions, children, pregnant women, and adults over 65, should monitor AirNow.gov alerts and limit outdoor activity on Unhealthy (AQI 151+) and Very Unhealthy (201+) days. Peak readings reached AQI 321, well into the Hazardous range.
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 PM10, driving AQI on 268 of 268 monitored days.
5-Year Air Quality Trend
Air quality is worsening in Luna County. Best year: 2024 (341 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 335 | 18 | 0 | 0 | 19 | 353 |
| 2021 | 339 | 20 | 2 | 0 | 19 | 462 |
| 2022 | 317 | 32 | 6 | 2 | 17 | 806 |
| 2023 | 334 | 15 | 1 | 1 | 16 | 157 |
| 2024 | 341 | 20 | 3 | 1 | 17 | 153 |
| 2025 | 213 | 37 | 9 | 7 | 19 | 321 |
How does Luna County compare?
How Luna County compares
Good-day share better than US avg
Luna County 79.5%
Bernalillo County, New Mexico 23.7%
US average 76.5%
Median AQI better than US avg
Luna County 19
Bernalillo County, New Mexico 59
US average 38
Unhealthy days / yr worse than US avg
Luna County 9
Bernalillo County, New Mexico 3
US average 0
Other Counties in New Mexico
Air quality comparison for nearby counties in New Mexico.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Luna County.
Adams County, Washington
AQI 19 · 94.7% good
Bonneville County, Idaho
AQI 19 · 94.9% good
Elko County, Nevada
AQI 19 · 90.8% good
Grays Harbor County, Washington
AQI 19 · 97.9% good
Jefferson County, Washington
AQI 19 · 96.5% good
Mohave County, Arizona
AQI 19 · 93.4% good
What Luna County's air means for you
On most days the air here is fine, but PM10 drives 9 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-PM10 days, the guide explains what a median of 19 means for exposure. Health guidance
- See how Luna County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Luna County with its New Mexico neighbours before drawing a conclusion about the region. All of New Mexico
Based on 268 EPA-monitored days in 2025; figures reflect only days the monitors reported. Source: EPA Air Quality System annual summaries.
More Air Quality Data
Air Quality Guides
Frequently Asked Questions
What is the air quality in Luna County, New Mexico? ▼
Luna County has a median Air Quality Index (AQI) of 19, rated "Good." 79.5% of monitored days (213 out of 268) had good air quality in 2025.
What is the main pollutant in Luna County? ▼
The primary pollutant in Luna County is Coarse Particles (PM10), which was the main AQI driver on 268 days (100% of monitored days). Irritates airways and can aggravate asthma and bronchitis.
How many unhealthy air days does Luna County have? ▼
In 2025, Luna County recorded 9 unhealthy air days (7 Unhealthy, 1 Very Unhealthy, 1 Hazardous). The maximum AQI reached 321.
Is the air quality in Luna County getting better or worse? ▼
Air quality in Luna County is worsening based on 5-year trends (2020-2025). Best year: 2024 with 341 good days. Worst year: 2025 with 213 good days.
What does AQI 19 mean for health? ▼
Luna County's median AQI of 19 falls in the "Good" category. See the <a href="/guides/understanding-aqi" class="underline">AQI category guide</a> for what each range means for health.
How does Luna County compare to other counties in New Mexico? ▼
Luna County has 79.5% good air days. Nearby counties in New Mexico: Bernalillo (23.7% good), Catron (100.0% good), Chaves (94.4% good), Dona Ana (19.4% good), Eddy (46.9% good), Lea (61.5% good).
What is the 90th percentile AQI in Luna County? ▼
The 90th percentile AQI for Luna County is 82, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 321 (Hazardous).
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.
Every figure on PlainAir 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.