Metro area air quality · 2025

Oklahoma City, OK

Median AQI 52 (Moderate). 44.4% of monitored days rated Good across this metro's EPA monitoring network.

52
Median AQI
44.4%
Good-air days
1
Unhealthy days
9%
Cleaner than US metros

Oklahoma City, OK posted a 2025 median AQI of 52 (Moderate) with 44.4% Good days

According to the U.S. EPA Air Quality System, the Oklahoma City, OK CBSA recorded a median AQI of 52 across 365 monitored days in 2025, with 44.4% rated Good and 1 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 Oklahoma City, OK CBSA's 44.4% Good-day share places it cleaner than 9% of US metros in 2025.
Closest median-AQI peer
Augusta-Richmond County, GA-SC (46.0% Good, median AQI 52) is the closest nationwide median-AQI peer to Oklahoma City, OK.
2020–2025 Good-day shift
Oklahoma City, OK's Good-day share moved +8.3 points from 2020 to 2025 (median AQI -1).
Median AQI
Median AQI: 52

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

The verdict

Oklahoma City, OK lands in the lower Good-day tercile (44.4% Good), a thinner clean-air share than most CBSA peers here. On the EPA scale the metro runs moderate, among the more polluted US metros, with a median AQI of 52 and 44.4% of 365 monitored days in the Good band.

52
median AQI · Moderate
44.4%
days rated Good
9%
cleaner than US metros
459
worst single reading

1 day reached Unhealthy or worse across the metro's monitors in 2025.

Annual release change

What changed in the 2025 EPA annual release

2024 → 2025
  • Oklahoma City, OK metro's peak single-day AQI rose from 147 to 459 between the 2024 and 2025 EPA annual releases, a change of +312 points.
  • Oklahoma City, OK metro's Good-day share rose from 42.7% to 45.4% between the 2024 and 2025 EPA annual releases, a change of +2.7 percentage points.

Compared against 349 monitored days in 2024 and 357 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

Oklahoma City, OK lands in the lower Good-day tercile (44.4% Good), a thinner clean-air share than most CBSA peers here. Signature read: 44.4% Good-day share (low tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 52 over 365 measured days in 2025 (Moderate / Poor). The monitored-day split lands at 162 Good (44%), 195 Moderate (53%), and 7 Unhealthy-for-Sensitive-Groups (2%). The 90th-percentile AQI finished at 77; the highest single-day reading hit 459 (Hazardous).

Across 2020–2025, Good-day share shifted +8.3 points and median AQI moved -1 (improving). The annual record contains 1 day at Unhealthy or worse. Metros with comparable AQI profiles include Augusta-Richmond County, GA-SC (46.0% good, AQI 52); Beaumont-Port Arthur, TX (41.4% good, AQI 52); Birmingham-Hoover, AL (43.0% good, AQI 52).

Health effects of air pollution →

Air Quality Summary

Median AQI

52

Moderate

Good Days

44.4%

162 of 365 days

Max AQI

459

Hazardous

Health Grade

Poor

90th pct: 77

AQI Day Breakdown (2025)

Distribution of 365 monitored days across EPA AQI categories.

Good

162

44%

Moderate

195

53%

USG

7

2%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

1

0%

Health Impact Assessment

Poor

The Oklahoma City, OK metro area's air quality is rated Poor based on 44.4% good air days. There were 1 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 459, 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.

How does the Oklahoma City, OK metro compare?

How Oklahoma City, OK compares

Good-day share worse than typical
Oklahoma City, OK 44.4%
Augusta-Richmond County, GA-SC 46.0%
Typical US metro 70.6%
Median AQI worse than typical
Oklahoma City, OK 52
Augusta-Richmond County, GA-SC 52
Typical US metro 41
Unhealthy days / yr about typical
Oklahoma City, OK 1
Augusta-Richmond County, GA-SC 0
Typical US metro 1

5-Year Air Quality Trend

Air quality is improving in the Oklahoma City, OK metro. Highest Good-day share: 2025 (45.4%, 162 of 357 monitored days).

Year Good Moderate Unhealthy Median AQI
2020 134 227 0 53
2021 110 245 0 56
2022 131 225 0 54
2023 128 222 0 54
2024 149 200 0 53
2025 162 195 0 52

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Oklahoma City, OK (52).

Augusta-Richmond County, GA-SC

Median AQI 52 · 46.0% Good-day share

52

Beaumont-Port Arthur, TX

Median AQI 52 · 41.4% Good-day share

52

Birmingham-Hoover, AL

Median AQI 52 · 43.0% Good-day share

52

Charlotte-Concord-Gastonia, NC-SC

Median AQI 52 · 46.0% Good-day share

52

El Dorado, AR

Median AQI 52 · 41.8% Good-day share

52

Grand Rapids-Wyoming, MI

Median AQI 52 · 41.9% Good-day share

52

Metros with similar unhealthy-day exposure

A second relationship type: metros whose unhealthy-or-worse day count is closest to Oklahoma City, OK's 1 (independent of median AQI).

Ann Arbor, MI

1 unhealthy-or-worse days · median AQI 41

41

Bangor, ME

1 unhealthy-or-worse days · median AQI 33

33

Baraboo, WI

1 unhealthy-or-worse days · median AQI 35

35

Bartlesville, OK

1 unhealthy-or-worse days · median AQI 44

44

Beaver Dam, WI

1 unhealthy-or-worse days · median AQI 40

40

Bellingham, WA

1 unhealthy-or-worse days · median AQI 31

31

Frequently Asked Questions

How many unhealthy air days does Oklahoma City, OK have? ▼
In 2025, the Oklahoma City, OK metro area recorded 1 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 1 Hazardous). The maximum AQI reached 459.
What is the air quality in the Oklahoma City, OK metro area? ▼
The Oklahoma City, OK metro area has a median Air Quality Index (AQI) of 52, rated "Moderate." 44.4% of monitored days (162 out of 365) had good air quality in 2025.
Is air quality in Oklahoma City, OK getting better or worse? ▼
Air quality in the Oklahoma City, OK metro is improving across floor-qualifying years (2020-2025); years with fewer than 100 monitored days are excluded from that direction. Highest qualifying Good-day share: 2025 at 45.4% (162 of 357 days). Lowest qualifying Good-day share: 2021 at 31.0% (110 of 355 days).
What does AQI 52 mean for health? ▼
An AQI of 52 is "Moderate", air quality is acceptable, but some pollutants may pose a moderate health concern for a small number of sensitive individuals.
How does Oklahoma City, OK compare to other metro areas? ▼
The Oklahoma City, OK metro has 44.4% good air days. Similar metros: Augusta-Richmond County, GA-SC (46.0% good), Beaumont-Port Arthur, TX (41.4% good), Birmingham-Hoover, AL (43.0% good).
What is the 90th percentile AQI for Oklahoma City, OK? ▼
The 90th percentile AQI for the Oklahoma City, OK metro area is 77, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 459 (Hazardous).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Oklahoma City, OK, 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, Oklahoma City, OK · 2020–2025