Median AQI
49
Good
New Mexico · County air quality · 2025
Eddy County, New Mexico
Median AQI 49 (Good). 53.7% of monitored days rated Good, direct from EPA Air Quality System stations.
- 49
- Median AQI
- 53.7%
- Good-air days
- 1
- Unhealthy days
- 9%
- Cleaner than US counties
Eddy County's 2025 annual median AQI is 49 (Good), with 53.7% Good days
According to the U.S. EPA Air Quality System, Eddy County, New Mexico posted a 2025 median AQI of 49 (Good) across 365 monitored days, with 53.7% rated Good and 1 unhealthy or worse. This is an annual comparison, not today's advisory.
Data source EPA Air Quality System (AQS)
- Cleaner than US
- Eddy County's 53.7% Good-day share places it cleaner than 9% of US counties in 2025.
- Closest median-AQI peer
- Adams County (55.1% Good, median AQI 49) is the closest nationwide median-AQI peer to Eddy County.
- 2020–2025 trend
- Eddy County's floor-qualifying Good-day share is worsening from 2020 to 2025 (67.0% → 53.7%).
- Median AQI
- Median AQI: 49
The verdict
According to EPA Air Quality System monitoring data, Eddy County's air is good on balance, among the most polluted counties nationally, a median AQI of 49 with 53.7% of 365 monitored days in the Good band, driven mainly by Ozone.
- 49
- median AQI · Good
- 53.7%
- days rated Good
- Ozone
- main pollutant
- 9%
- cleaner than US counties
1 day reached Unhealthy or worse; the worst single reading hit AQI 168.
Annual release change
What changed in the 2025 EPA annual release
- Eddy County's Good-day share rose from 51.4% to 53.7% between the 2024 and 2025 EPA annual releases, a change of +2.3 percentage points.
- Eddy County's Unhealthy-category days fell from 3 to 1 between the 2024 and 2025 EPA annual releases, a change of -2 days.
- Eddy County's peak single-day AQI fell from 179 to 168 between the 2024 and 2025 EPA annual releases, a change of -11 points.
Data updated August 2026
- Good · 196 d · 53.7%
- Moderate · 144 d · 39.5%
- USG · 24 d · 6.6%
- Unhealthy · 1 d · 0.3%
How did Eddy County's air break down in 2025?
Across 365 monitored days, 196 fell in the Good band (AQI 0–50) and 1 reached Unhealthy or worse. The worst single day peaked at AQI 168 (Unhealthy).
EPA AQS →Air quality data from EPA Air Quality System (2025). 365 days monitored. Median AQI: 49 (Good).
Insights: Eddy County, New Mexico. EPA monitors recorded a median Air Quality Index of 49 across 365 measured days in 2025, earning a Good classification and a Moderate health grade. Of those days, 196 (54%) fell in the Good band (AQI 0–50), 144 (39%) registered Moderate readings, and 24 (7%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 90, while the worst single-day peak hit 168 (Unhealthy). Residents averaged about 16.1 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (353 days), PM2.5 (12 days). Across the 2020–2025 trend window, the share of monitored days rated Good shifted by -13.3 points and the median AQI moved +3 points, placing the multi-year trajectory at worsening. The annual record contains 1 day at Unhealthy or worse. On that day, the EPA recommends that sensitive groups limit prolonged outdoor exertion. Nearby counties show comparable readings: Bernalillo (26.6% good, AQI 58); Catron (71.7% good, AQI 45); Chaves (91.9% good, AQI 29); Dona Ana (27.4% good, AQI 61); Lea (68.8% good, AQI 44); Lincoln (68.3% good, AQI 44).
Air Quality Summary
Good Days
53.7%
196 of 365 monitored days
-21.3pp vs 75% target
Max AQI Recorded
168
Unhealthy
Health Grade
Moderate
90th-pct AQI 90
Eddy County, Good days share 53.7%
National avg
Share of monitored days at AQI 0-50 (Good band).
Eddy County, Unhealthy-or-worse share 2.7%
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
196
54%
Moderate
144
39%
USG
24
7%
Unhealthy
1
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Eddy County.
- Ozone · 353 days · 96.7%
- PM2.5 · 12 days · 3.3%
Health Impact Assessment
Moderate
Eddy County's air quality is rated Moderate based on 53.7% good air days. There were 1 unhealthy days in 2025 when outdoor activity should be limited.
Air quality is acceptable most days, but 24 days reached "Unhealthy for Sensitive Groups" (AQI 101-150) and peak AQI reached 168. Sensitive groups should monitor real-time conditions at AirNow.gov.
The dominant pollutant is Ozone, driving AQI on 353 of 365 monitored days.
5-Year Air Quality Trend
Air quality is worsening in Eddy County. Highest Good-day share: 2020 (67.0%, 244 of 364 monitored days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 244 | 109 | 11 | 0 | 46 | 115 |
| 2021 | 219 | 120 | 25 | 1 | 47 | 166 |
| 2022 | 207 | 130 | 27 | 1 | 48 | 151 |
| 2023 | 195 | 151 | 19 | 0 | 49 | 143 |
| 2024 | 188 | 142 | 33 | 3 | 49 | 179 |
| 2025 | 196 | 144 | 24 | 1 | 49 | 168 |
How does Eddy County compare?
How Eddy County compares
Good-day share worse than typical
Eddy County 53.7%
Adams County, Colorado 55.1%
Typical US county 76.0%
Median AQI worse than typical
Eddy County 49
Adams County, Colorado 49
Typical US county 39
Unhealthy days / yr about typical
Eddy County 1
Adams County, Colorado 0
Typical US county 1
Counties with a similar median AQI
Nationwide peers within about the same annual median AQI as Eddy County (49), not geographic neighbors.
Adams County, Colorado
Median AQI 49 · 55.1% Good-day share
Albany County, Wyoming
Median AQI 49 · 55.6% Good-day share
Black Hawk County, Iowa
Median AQI 49 · 53.4% Good-day share
Davidson County, Tennessee
Median AQI 49 · 52.9% Good-day share
Fulton County, Georgia
Median AQI 49 · 54.3% Good-day share
Hillsborough County, Florida
Median AQI 49 · 53.1% 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).
Yuma County, Arizona
54.0% Good-day share · median AQI 48
Sacramento County, California
54.3% Good-day share · median AQI 49
San Luis Obispo County, California
52.3% Good-day share · median AQI 50
Ventura County, California
52.0% Good-day share · median AQI 50
Utah County, Utah
56.4% Good-day share · median AQI 48
Merced County, California
51.0% Good-day share · median AQI 50
New Mexico counties on the map
Geographic containment only, other monitored counties in New Mexico, independent of AQI or pollutant match.
What Eddy County's air means for you
On most days the air here is fine, but Ozone drives 1 unhealthy-or-worse day 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 49 means for exposure. Health guidance
- See how Eddy County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Eddy 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 Eddy County, New Mexico? ▼
Eddy County has a median Air Quality Index (AQI) of 49, rated "Good." 53.7% of monitored days (196 out of 365) had good air quality in 2025.
What is the main pollutant in Eddy County? ▼
The primary pollutant in Eddy County is Ozone (O3), which was the main AQI driver on 353 days (97% of monitored days). Can trigger asthma, reduce lung function, and cause chest pain.
How many unhealthy air days does Eddy County have? ▼
In 2025, Eddy County recorded 1 unhealthy air days (1 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 168.
Is the air quality in Eddy County getting better or worse? ▼
Air quality in Eddy County is worsening 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 67.0% (244 of 364 days). Lowest qualifying Good-day share: 2024 at 51.4% (188 of 366 days).
What does AQI 49 mean for health? ▼
Eddy County's median AQI of 49 falls in the "Good" category. See the AQI category guide for what each range means for health.
How does Eddy County compare to other counties in New Mexico? ▼
Eddy County has 53.7% good air days. Nearby counties in New Mexico: Bernalillo (26.6% good), Catron (71.7% good), Chaves (91.9% good), Dona Ana (27.4% good), Lea (68.8% good), Lincoln (68.3% good).
What is the 90th percentile AQI in Eddy County? ▼
The 90th percentile AQI for Eddy County is 90, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 168 (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 Eddy 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.