Bad Air Days in Pacific County, Washington: 0 a Year
0 bad air days a year
Rare: among the cleanest-air counties EPA monitors. Ranked 992 of 996 monitored counties, where 1 is worst.
What to buy, and what not to
- Bad air days are rare here. A standard furnace filter is enough; no purifier needed for outdoor air.
- On the odd bad day, check AirNow and keep windows shut.
The record for Pacific
| Date | AQI | Main pollutant |
|---|---|---|
| 2023-11-01 | 56 | PM2.5 |
| 2023-11-30 | 56 | PM2.5 |
| 2023-11-29 | 54 | PM2.5 |
| 2024-10-15 | 54 | PM2.5 |
| 2023-10-31 | 53 | PM2.5 |
The air on a normal day
Across 787 monitored days from 2023 to 2025, the air in Pacific County rated Good on 99% of them, more often than the 72% typical of monitored counties, and Moderate on 1%. The median day sat at AQI 16; one day in ten went above 26.
The pollutant setting the AQI on an ordinary day here:
- fine particles (PM2.5)100%787 days
Pacific County by year
| Year | Days monitored | Good | Moderate | Over 100 | Over 150 | Median AQI | Highest AQI |
|---|---|---|---|---|---|---|---|
| 2025* | 365 | 364 | 1 | 0 | 0 | 16 | 51 |
| 2024 | 330 | 329 | 1 | 0 | 0 | 16 | 54 |
| 2023 | 92 | 87 | 5 | 0 | 0 | 20 | 56 |
*2025 may be a partial year in EPA's file.
Washington compared
- Yakima County13/yr
- Chelan County11/yr
- Okanogan County11/yr
- Stevens County9/yr
- Asotin County8/yr
- King County8/yr
- Snohomish County7/yr
- Benton County6/yr
How this is counted
A bad air day is a day the county's daily AQI from EPA AirData went above 100, the level where EPA tells children, older adults and people with asthma or heart disease to cut back outdoors. Monitors do not run every day, so yearly counts are scaled to 365 days. This is the record, not today's air: for that, check AirNow. More on the method in how the county numbers are made, on the AQI 100 line in what counts as a bad air day.