Metro area air quality · 2024

Othello, WA

Median AQI 18 (Good). 93.5% of monitored days rated Good across this metro's EPA monitoring network.

18
Median AQI
93.5%
Good-air days
0
Unhealthy days
92%
Cleaner than US metros

Aggregated from EPA Air Quality System (2024), 351 monitored days. EPA AQS → · NOAA →

Insights: Othello, WA metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 18 over 351 measured days in 2024, which corresponds to a Good band and a Excellent metro-wide health grade. The monitored-day split lands at 328 Good days (93%), 23 Moderate (7%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 41 while the highest single-day reading hit 71 (Moderate). Metro residents averaged roughly 28.0 clean-air days per 30-day window across the reporting year.

Across the 2020–2024 trend window, good days shifted by -17 and the median AQI moved +1 points, which classifies the multi-year trajectory as worsening. The metro avoided any Unhealthy-tier days entirely, an outcome that typically reflects favorable wind patterns, lower industrial density, or effective regional emission controls. Metros with comparable AQI profiles include Bozeman, MT (90.1% good, AQI 18); Monroe, MI (94.9% good, AQI 18); Bremerton-Silverdale, WA (97.2% good, AQI 19).

Air Quality Summary

Median AQI

18

Good

Good Days

93.5%

328 of 351 days

Max AQI

71

Moderate

Health Grade

Excellent

90th pct: 41

AQI Day Breakdown (2024)

Distribution of 351 monitored days across EPA AQI categories.

Good

328

93%

Moderate

23

7%

USG

0

0%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Excellent

The Othello, WA metro area's air quality is rated Excellent based on 93.5% good air days. No unhealthy air days were recorded in 2024.

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

Good-day share better than US avg
Othello, WA 93.5%
Bozeman, MT 90.1%
US average 70.2%
Median AQI better than US avg
Othello, WA 18
Bozeman, MT 18
US average 41
Unhealthy days / yr better than US avg
Othello, WA 0
Bozeman, MT 0
US average 1

5-Year Air Quality Trend

Air quality is worsening in the Othello, WA metro. Best year: 2020 (345 good days).

Year Good Moderate Unhealthy Median AQI
2020 345 11 5 17
2021 333 24 4 19
2022 327 34 2 18
2023 330 32 0 21
2024 328 23 0 18

Metros with Similar Air Quality

Metro areas across the US with a similar median AQI to Othello, WA.

Bozeman, MT

AQI 18 · 90.1% good

18

Monroe, MI

AQI 18 · 94.9% good

18

Bremerton-Silverdale, WA

AQI 19 · 97.2% good

19

Deming, NM

AQI 17 · 93.4% good

17

Hailey, ID

AQI 19 · 86.3% good

19

Lake Havasu City-Kingman, AZ

AQI 19 · 98.6% good

19

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Air Quality Guides

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Health Effects of Air Pollution

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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 18, rated "Good." 93.5% of monitored days (328 out of 351) had good air quality in 2024.
How many unhealthy air days does Othello, WA have? ▼
In 2024, the Othello, WA metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 71.
Is air quality in Othello, WA getting better or worse? ▼
Air quality in the Othello, WA metro is worsening based on 5-year trends (2020-2024). Best year: 2020 with 345 good days. Worst year: 2022 with 327 good days.
What does AQI 18 mean for health? ▼
An AQI of 18 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 41, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 71 (Moderate).
How does Othello, WA compare to other metro areas? ▼
The Othello, WA metro has 93.5% good air days. Similar metros: Bozeman, MT (90.1% good), Monroe, MI (94.9% good), Bremerton-Silverdale, WA (97.2% good).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset, 2020–2024. The AQS collects ambient air monitoring data from state, local, and tribal monitoring agencies across the United States.

Metrics: Air Quality Index (AQI) is calculated using EPA-standard breakpoints for six criteria pollutants: PM2.5, PM10, Ozone, NO2, CO, and SO2. Median AQI, max AQI, and 90th percentile AQI are computed from daily measurements. Good days percentage reflects days with AQI 0–50.

Coverage: 501 metro areas (Core Based Statistical Areas). Only metros with active monitoring stations are included. Unmonitored areas are not represented.

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

Source: U.S. EPA, AirNow / AQS Air Quality Index readings and pollutant concentrations · 2025