Metro area air quality · 2025

Farmington, NM

Median AQI 47 (Good). 68.0% of monitored days rated Good across this metro's EPA monitoring network.

Compiled by PlainAirData · August 23, 2026

47
Median AQI: 68.0%
Good-air days: 0
Unhealthy days: 40%
Cleaner than US metros

Farmington, NM posted a 2025 median AQI of 47 (Good) with 68.0% Good days

According to the U.S. EPA Air Quality System, the Farmington, NM CBSA recorded a median AQI of 47 across 365 monitored days in 2025, with 68.0% rated Good and 0 unhealthy or worse. This is an annual metro comparison, not a live advisory.

Data source EPA Air Quality System (AQS)

Cleaner than US metros: The Farmington, NM CBSA's 68.0% Good-day share places it cleaner than 40% of US metros in 2025.
Closest median-AQI peer: Charleston-North Charleston, SC (60.3% Good, median AQI 47) is the closest nationwide median-AQI peer to Farmington, NM.
2020–2025 Good-day shift: Farmington, NM's Good-day share moved -5.5 points from 2020 to 2025 (median AQI +2).
Median AQI: Median AQI: 47

Aggregated from EPA Air Quality System (2025), 365 monitored days. EPA AQS →

The verdict

Farmington, NM's median AQI 47 is in the upper (dirtier) CBSA tercile on this site. On the EPA scale the metro runs good, more polluted than the median US metro, with a median AQI of 47 and 68.0% of 365 monitored days in the Good band.

47
median AQI · Good: 68.0%
days rated Good: 40%
cleaner than US metros: 97
worst single reading

No day crossed into the Unhealthy tier across the metro's monitors in 2025.

Farmington, NM metro's Good-day share rose from 61.4% to 67.9% between the 2024 and 2025 EPA annual releases, a change of +6.5 percentage points.
Farmington, NM metro's peak single-day AQI fell from 115 to 97 between the 2024 and 2025 EPA annual releases, a change of -18 points.

Farmington, NM's median AQI 47 is in the upper (dirtier) CBSA tercile on this site. Signature read: median AQI 47 (high tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 47 over 365 measured days in 2025 (Good / Moderate). The monitored-day split lands at 248 Good (68%), 117 Moderate (32%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 74; the highest single-day reading hit 97 (Moderate).

Across 2020–2025, Good-day share shifted -5.5 points and median AQI moved +2 (worsening). No Unhealthy-tier days appear in this annual dataset. Metros with comparable AQI profiles include Charleston-North Charleston, SC (60.3% good, AQI 47); Columbia, SC (58.1% good, AQI 47); Corsicana, TX (59.2% good, AQI 47).

Health effects of air pollution →

Air Quality Summary

Median AQI

Good

Good Days

68.0%

248 of 365 days

Max AQI

Moderate

Health Grade

Moderate

90th pct: 74

AQI Day Breakdown (2025)

Distribution of 365 monitored days across EPA AQI categories.

Good

248

68%

Moderate

117

32%

USG

Unhealthy

Very Unhealthy

Hazardous

Health Impact Assessment

Moderate

The Farmington, NM metro area's air quality is rated Moderate based on 68.0% good air days. No unhealthy air days were recorded in 2025.

Air quality is generally acceptable. Unusually sensitive people should monitor real-time conditions at AirNow.gov during high-pollution events.

How does the Farmington, NM metro compare?

How Farmington, NM compares

Compare against

Good-day share worse than typical

Farmington, NM 68.0%

Charleston-North Charleston, SC 60.3%

Typical US metro 70.6%

Median AQI worse than typical

Farmington, NM 47

Charleston-North Charleston, SC 47

Typical US metro 41

Unhealthy days / yr better than typical

Farmington, NM 0

Charleston-North Charleston, SC 0

Typical US metro 1

5-Year Air Quality Trend

Air quality is worsening in the Farmington, NM metro. Highest Good-day share: 2020 (73.4%, 265 of 361 monitored days).

Year	Good	Moderate	Unhealthy	Median AQI	Max AQI
2020	265	96	0	45	109
2021	237	120	0	46	126
2022	238	116	1	45	220
2023	249	112	0	46	117
2024	218	137	0	48	115
2025	248	117	0	47	97

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Farmington, NM (47).

Charleston-North Charleston, SC

Median AQI 47 · 60.3% Good-day share

Columbia, SC

Median AQI 47 · 58.1% Good-day share

Corsicana, TX

Median AQI 47 · 59.2% Good-day share

Dayton, OH

Median AQI 47 · 57.0% Good-day share

Evansville, IN-KY

Median AQI 47 · 57.5% Good-day share

Glenwood Springs, CO

Median AQI 47 · 66.8% Good-day share

Metros with similar unhealthy-day exposure

A second relationship type: metros whose unhealthy-or-worse day count is closest to Farmington, NM's 0 (independent of median AQI).

Aberdeen, SD

0 unhealthy-or-worse days · median AQI 27

Aberdeen, WA

0 unhealthy-or-worse days · median AQI 22

Adrian, MI

0 unhealthy-or-worse days · median AQI 41

Akron, OH

0 unhealthy-or-worse days · median AQI 45

Albany, GA

0 unhealthy-or-worse days · median AQI 46

Albany, OR

0 unhealthy-or-worse days · median AQI 27

Frequently Asked Questions

What does AQI 47 mean for health? ▼

An AQI of 47 is "Good", air quality is satisfactory and poses little or no health risk. This is the best category on the EPA's AQI scale.

How many unhealthy air days does Farmington, NM have? ▼

In 2025, the Farmington, NM metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 97.

What is the air quality in the Farmington, NM metro area? ▼

The Farmington, NM metro area has a median Air Quality Index (AQI) of 47, rated "Good." 68.0% of monitored days (248 out of 365) had good air quality in 2025.

Is air quality in Farmington, NM getting better or worse? ▼

Air quality in the Farmington, NM metro 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 73.4% (265 of 361 days). Lowest qualifying Good-day share: 2024 at 61.4% (218 of 355 days).

How does Farmington, NM compare to other metro areas? ▼

The Farmington, NM metro has 68.0% good air days. Similar metros: Charleston-North Charleston, SC (60.3% good), Columbia, SC (58.1% good), Corsicana, TX (59.2% good).

What is the 90th percentile AQI for Farmington, NM? ▼

The 90th percentile AQI for the Farmington, NM metro area is 74, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 97 (Moderate).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Farmington, NM, 2025. See our methodology for how AQI, median, and coverage figures are computed.

Read our methodology , how this data is sourced, computed, and verified.

Source: U.S. EPA Air Quality System (AQS) Annual AQI by CBSA summary, Farmington, NM · 2020–2025 Accessed 2026-07-06