What is the air quality in Chaves County, New Mexico?

EPA monitors reported only 86 days for Chaves County in 2025, below the 100-day floor used for annual conclusions. Within that limited sample, the median AQI was 29 and 79 days were rated Good; this does not describe the full year.

What is the main pollutant in Chaves County?

The primary pollutant in Chaves County is Fine Particles (PM2.5), which was the main AQI driver on 86 days (100% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.

How many unhealthy air days does Chaves County have?

Among 86 reported days in 2025, 0 reached Unhealthy or worse. Because the record is below 100 monitored days, that count cannot establish how many unhealthy days occurred across the full year.

Is the air quality in Chaves County getting better or worse?

Air quality in Chaves County is stable across floor-qualifying years (2020-2024); years with fewer than 100 monitored days are excluded from that direction. Highest qualifying Good-day share: 2024 at 91.2% (104 of 114 days). Lowest qualifying Good-day share: 2022 at 89.3% (108 of 121 days).

What does AQI 29 mean for health?

The median of the 86 reported days was AQI 29, in the "Good" category. The limited sample is not enough to assign the county a full-year health grade. See the AQI category guide for day-level meaning and EPA AirNow for current conditions.

How does Chaves County compare to other counties in New Mexico?

Chaves County is not placed in county comparisons because its 86-day record is below the 100-day comparison floor.

What is the 90th percentile AQI in Chaves County?

The 90th percentile AQI for Chaves County is 47, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 117 (USG).

New Mexico · County air quality · 2025

Chaves County, New Mexico

Limited EPA sample: 86 monitored days, below the 100-day floor for a full-year verdict. The figures below describe only those reported days.

Compiled by PlainAirData · August 23, 2026

29
Sample median AQI: 91.9%
Good in sample: 0
Unhealthy in sample: 86
100-day comparison floor

Chaves County has only 86 EPA-monitored days in 2025, below the 100-day annual floor

According to the U.S. EPA Air Quality System, Chaves County, New Mexico reported 86 monitored days in 2025. That sample is too thin for a full-year air-quality grade or peer ranking. Use the figures only as the reported-day record, and check AirNow for current conditions.

Data source EPA Air Quality System (AQS)

Monitored days: Chaves County reported 86 monitored days in 2025, below the 100-day floor: sample-only, not a full-year peer rank.
Sample median AQI: Sample median AQI: 29
Annual floor: Annual floor: 100

Chaves County's peak single-day AQI rose from 75 to 88 between the 2023 and 2024 EPA annual releases, a change of +13 points.
Chaves County's median AQI rose from 24 to 27 between the 2023 and 2024 EPA annual releases, a change of +3 points.

Data updated August 2026

Good · 79 d · 91.9%
Moderate · 5 d · 5.8%
USG · 2 d · 2.3%

How did Chaves County's reported sample break down in 2025?

Across 86 monitored days, 79 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 117 (USG).

EPA AQS →

Pollutant Breakdown

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

PM2.5 · 86 days · 100.0%

Sample Coverage and Health Context

Limited sample

Chaves County has no annual health grade because only 86 days were reported, below the 100-day floor. The 91.9% Good-day share describes only that sample.

Reported days do not reveal what happened during unmonitored parts of the year, including seasonal smoke, ozone, or inversion periods. Use these values as a description of the available EPA sample only, and check AirNow.gov for current health guidance.

The dominant pollutant is PM2.5, driving AQI on 86 of 86 monitored days.

5-Year Air Quality Trend

Air quality is stable in Chaves County. Highest Good-day share: 2024 (91.2%, 104 of 114 monitored days). The 2025 row is shown for transparency but excluded from the direction because it has fewer than 100 monitored days.

Year	Good	Moderate	USG	Median AQI	Max AQI
2020	108	11	0	23	78
2021	110	11	0	24	74
2022	108	13	0	26	64
2023	107	11	0	24	75
2024	104	10	0	27	88
2025	79	5	2	29	117

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 Chaves County, New Mexico · 2020–2025 Accessed 2026-08-23

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.