Metro area air quality · 2025

Othello, WA

Median AQI 21 (Good). 90.5% of monitored days rated Good across this metro's EPA monitoring network.

Compiled by PlainAirData · August 23, 2026

21
Median AQI: 90.5%
Good-air days: 0
Unhealthy days: 87%
Cleaner than US metros

Othello, WA posted a 2025 median AQI of 21 (Good) with 90.5% Good days

According to the U.S. EPA Air Quality System, the Othello, WA CBSA recorded a median AQI of 21 across 348 monitored days in 2025, with 90.5% 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 Othello, WA CBSA's 90.5% Good-day share places it cleaner than 87% of US metros in 2025.
Closest median-AQI peer: Kahului-Wailuku-Lahaina, HI (98.1% Good, median AQI 21) is the closest nationwide median-AQI peer to Othello, WA.
2020–2025 Good-day shift: Othello, WA's Good-day share moved -5.1 points from 2020 to 2025 (median AQI +4).
Median AQI: Median AQI: 21

Aggregated from EPA Air Quality System (2025), 348 monitored days. EPA AQS →

The verdict

The Othello, WA metro runs good on the EPA scale, cleaner than most US metros, a median AQI of 21 with 90.5% of 348 monitored days in the Good band.

21
median AQI · Good: 90.5%
days rated Good: 87%
cleaner than US metros: 99
worst single reading

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

Othello, WA metro's Good-day share fell from 93.4% to 90.5% between the 2024 and 2025 EPA annual releases, a change of -2.9 percentage points.
Othello, WA metro's peak single-day AQI rose from 71 to 99 between the 2024 and 2025 EPA annual releases, a change of +28 points.
Othello, WA metro's median AQI rose from 18 to 21 between the 2024 and 2025 EPA annual releases, a change of +3 points.

Insights: Othello, WA metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 21 over 348 measured days in 2025, which corresponds to a Good band and a Excellent metro-wide health grade. The monitored-day split lands at 315 Good days (91%), 33 Moderate (9%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 50 while the highest single-day reading hit 99 (Moderate). Metro residents averaged roughly 27.2 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, the share of monitored days rated Good shifted by -5.1 points and the median AQI moved +4 points, which classifies the multi-year trajectory as worsening. The metro recorded no Unhealthy-tier days in this annual dataset. Metros with comparable AQI profiles include Kahului-Wailuku-Lahaina, HI (98.1% good, AQI 21); Palatka, FL (95.6% good, AQI 21); Aberdeen, WA (97.3% good, AQI 22).

Air Quality Summary

Median AQI

Good

Good Days

90.5%

315 of 348 days

Max AQI

Moderate

Health Grade

Excellent

90th pct: 50

AQI Day Breakdown (2025)

Distribution of 348 monitored days across EPA AQI categories.

Good

315

91%

Moderate

USG

Unhealthy

Very Unhealthy

Hazardous

Health Impact Assessment

Excellent

The Othello, WA metro area's air quality is rated Excellent based on 90.5% 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 Othello, WA metro compare?

How Othello, WA compares

Compare against

Good-day share better than typical

Othello, WA 90.5%

Kahului-Wailuku-Lahaina, HI 98.1%

Typical US metro 70.6%

Median AQI better than typical

Othello, WA 21

Kahului-Wailuku-Lahaina, HI 21

Typical US metro 41

Unhealthy days / yr better than typical

Othello, WA 0

Kahului-Wailuku-Lahaina, HI 0

Typical US metro 1

5-Year Air Quality Trend

Air quality is worsening in the Othello, WA metro. Highest Good-day share: 2020 (95.6%, 345 of 361 monitored days).

Year	Good	Moderate	Unhealthy	Median AQI	Max AQI
2020	345	11	5	17	266
2021	333	24	4	19	191
2022	327	34	2	18	162
2023	330	32	0	21	267
2024	328	23	0	18	71
2025	315	33	0	21	99

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Othello, WA (21).

Kahului-Wailuku-Lahaina, HI

Median AQI 21 · 98.1% Good-day share

Palatka, FL

Median AQI 21 · 95.6% Good-day share

Aberdeen, WA

Median AQI 22 · 97.3% Good-day share

Bremerton-Silverdale, WA

Median AQI 22 · 95.5% Good-day share

Centralia, WA

Median AQI 20 · 91.3% Good-day share

Gardnerville Ranchos, NV

Median AQI 22 · 91.1% Good-day share

Metros with similar unhealthy-day exposure

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

Aberdeen, SD

0 unhealthy-or-worse days · median AQI 27

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

Albany-Schenectady-Troy, NY

0 unhealthy-or-worse days · median AQI 41

More Air Quality Data

Explore EPA air quality rankings and guides across U.S. metros and counties.

Cleanest Metro Areas

U.S. metros ranked by their share of Good air-quality days.

Worst Air Quality

Counties and metros with the most unhealthy air days.

All Metro Areas

Annual AQI by CBSA for every monitored U.S. metro area.

Best and Worst City Air

What drives urban air quality and how metro areas compare.

Air Quality Guides

Frequently Asked Questions

What is the air quality in the Othello, WA metro area? ▼

The Othello, WA metro area has a median Air Quality Index (AQI) of 21, rated "Good." 90.5% of monitored days (315 out of 348) had good air quality in 2025.

How many unhealthy air days does Othello, WA have? ▼

In 2025, the Othello, WA metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 99.

Is air quality in Othello, WA getting better or worse? ▼

Air quality in the Othello, WA 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 95.6% (345 of 361 days). Lowest qualifying Good-day share: 2022 at 90.1% (327 of 363 days).

What does AQI 21 mean for health? ▼

An AQI of 21 is "Good", air quality is satisfactory and poses little or no health risk. This is the best category on the EPA's AQI scale.

What is the 90th percentile AQI for Othello, WA? ▼

The 90th percentile AQI for the Othello, WA metro area is 50, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 99 (Moderate).

How does Othello, WA compare to other metro areas? ▼

The Othello, WA metro has 90.5% good air days. Similar metros: Kahului-Wailuku-Lahaina, HI (98.1% good), Palatka, FL (95.6% good), Aberdeen, WA (97.3% good).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset, 2020–2025. 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 files (metro-level) · 2020–2025 Accessed 2026-07-06

Send the source-year summary or download its ready-to-use data card.

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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.