Air Quality in King, Washington
41
Median AQI (2024)
119
Max AQI (2024)
→ stable
10-Year Trend
PM2.5
Primary Pollutant
255
Good Days (2024)
31
Monitoring Stations
AQI Trend (Median)
Air Quality Days by Category
Annual Summary
| Year | Median AQI | Max AQI | Good Days | Moderate Days | Unhealthy Days | Ozone Days | PM2.5 Days |
|---|---|---|---|---|---|---|---|
| 2024 | 41 | 119 | 255 | 108 | 3 | 127 | 236 |
| 2023 | 46 | 165 | 214 | 145 | 6 | 86 | 273 |
| 2022 | 46 | 237 | 216 | 130 | 19 | 94 | 262 |
| 2021 | 43 | 177 | 248 | 112 | 5 | 111 | 240 |
| 2020 | 43 | 299 | 248 | 106 | 12 | 65 | 287 |
| 2019 | 48 | 90 | 208 | 157 | 0 | 44 | 302 |
| 2018 | 46 | 210 | 212 | 139 | 14 | 67 | 256 |
| 2017 | 48 | 227 | 194 | 153 | 18 | 80 | 255 |
| 2016 | 44 | 100 | 240 | 126 | 0 | 54 | 271 |
| 2015 | 53 | 129 | 131 | 224 | 9 | 43 | 292 |
Recent Daily AQI
| Date | AQI | Category | Primary Pollutant |
|---|---|---|---|
| Dec 31, 2024 | 48 | Good | PM2.5 |
| Dec 30, 2024 | 28 | Good | PM2.5 |
| Dec 29, 2024 | 31 | Good | PM2.5 |
| Dec 28, 2024 | 32 | Good | Ozone |
| Dec 27, 2024 | 36 | Good | PM2.5 |
| Dec 26, 2024 | 34 | Good | Ozone |
| Dec 25, 2024 | 34 | Good | PM2.5 |
| Dec 24, 2024 | 52 | Moderate | PM2.5 |
| Dec 23, 2024 | 39 | Good | PM2.5 |
| Dec 22, 2024 | 32 | Good | PM2.5 |
| Dec 21, 2024 | 52 | Moderate | PM2.5 |
| Dec 20, 2024 | 63 | Moderate | PM2.5 |
| Dec 19, 2024 | 53 | Moderate | PM2.5 |
| Dec 18, 2024 | 38 | Good | PM2.5 |
| Dec 17, 2024 | 31 | Good | Ozone |
| Dec 16, 2024 | 51 | Moderate | PM2.5 |
| Dec 15, 2024 | 43 | Good | PM2.5 |
| Dec 14, 2024 | 34 | Good | Ozone |
| Dec 13, 2024 | 51 | Moderate | PM2.5 |
| Dec 12, 2024 | 62 | Moderate | PM2.5 |
| Dec 11, 2024 | 70 | Moderate | PM2.5 |
| Dec 10, 2024 | 42 | Good | PM2.5 |
| Dec 9, 2024 | 51 | Moderate | PM2.5 |
| Dec 8, 2024 | 34 | Good | Ozone |
| Dec 7, 2024 | 42 | Good | PM2.5 |
| Dec 6, 2024 | 69 | Moderate | PM2.5 |
| Dec 5, 2024 | 66 | Moderate | PM2.5 |
| Dec 4, 2024 | 75 | Moderate | PM2.5 |
| Dec 3, 2024 | 61 | Moderate | PM2.5 |
| Dec 2, 2024 | 69 | Moderate | PM2.5 |
| Dec 1, 2024 | 75 | Moderate | PM2.5 |
| Nov 30, 2024 | 70 | Moderate | PM2.5 |
| Nov 29, 2024 | 60 | Moderate | PM2.5 |
| Nov 28, 2024 | 55 | Moderate | PM2.5 |
| Nov 27, 2024 | 54 | Moderate | PM2.5 |
| Nov 26, 2024 | 48 | Good | PM2.5 |
| Nov 25, 2024 | 37 | Good | PM2.5 |
| Nov 24, 2024 | 49 | Good | PM2.5 |
| Nov 23, 2024 | 44 | Good | PM2.5 |
| Nov 22, 2024 | 34 | Good | PM2.5 |
| Nov 21, 2024 | 60 | Moderate | PM2.5 |
| Nov 20, 2024 | 44 | Good | PM2.5 |
| Nov 19, 2024 | 31 | Good | Ozone |
| Nov 18, 2024 | 29 | Good | Ozone |
| Nov 17, 2024 | 32 | Good | Ozone |
| Nov 16, 2024 | 38 | Good | PM2.5 |
| Nov 15, 2024 | 47 | Good | PM2.5 |
| Nov 14, 2024 | 31 | Good | Ozone |
| Nov 13, 2024 | 31 | Good | Ozone |
| Nov 12, 2024 | 32 | Good | PM2.5 |
| Nov 11, 2024 | 31 | Good | Ozone |
| Nov 10, 2024 | 58 | Moderate | PM2.5 |
| Nov 9, 2024 | 71 | Moderate | PM2.5 |
| Nov 8, 2024 | 61 | Moderate | PM2.5 |
| Nov 7, 2024 | 66 | Moderate | PM2.5 |
| Nov 6, 2024 | 42 | Good | PM2.5 |
| Nov 5, 2024 | 48 | Good | PM2.5 |
| Nov 4, 2024 | 41 | Good | PM2.5 |
| Nov 3, 2024 | 42 | Good | PM2.5 |
| Nov 2, 2024 | 36 | Good | PM2.5 |
| Nov 1, 2024 | 31 | Good | PM2.5 |
| Oct 31, 2024 | 40 | Good | PM2.5 |
| Oct 30, 2024 | 37 | Good | PM2.5 |
| Oct 29, 2024 | 47 | Good | PM2.5 |
| Oct 28, 2024 | 37 | Good | PM2.5 |
| Oct 27, 2024 | 34 | Good | Ozone |
| Oct 26, 2024 | 34 | Good | PM2.5 |
| Oct 25, 2024 | 52 | Moderate | PM2.5 |
| Oct 24, 2024 | 41 | Good | PM2.5 |
| Oct 23, 2024 | 53 | Moderate | PM2.5 |
| Oct 22, 2024 | 34 | Good | PM2.5 |
| Oct 21, 2024 | 33 | Good | Ozone |
| Oct 20, 2024 | 36 | Good | Ozone |
| Oct 19, 2024 | 34 | Good | Ozone |
| Oct 18, 2024 | 31 | Good | PM2.5 |
| Oct 17, 2024 | 37 | Good | PM2.5 |
| Oct 16, 2024 | 31 | Good | Ozone |
| Oct 15, 2024 | 35 | Good | PM2.5 |
| Oct 14, 2024 | 53 | Moderate | PM2.5 |
| Oct 13, 2024 | 61 | Moderate | PM2.5 |
| Oct 12, 2024 | 63 | Moderate | PM2.5 |
| Oct 11, 2024 | 54 | Moderate | PM2.5 |
| Oct 10, 2024 | 39 | Good | PM2.5 |
| Oct 9, 2024 | 33 | Good | PM2.5 |
| Oct 8, 2024 | 42 | Good | PM2.5 |
| Oct 7, 2024 | 57 | Moderate | PM2.5 |
| Oct 6, 2024 | 56 | Moderate | PM2.5 |
| Oct 5, 2024 | 41 | Good | PM2.5 |
| Oct 4, 2024 | 51 | Moderate | PM2.5 |
| Oct 3, 2024 | 51 | Moderate | PM2.5 |
Monitoring Stations
2.3 MI E OF CEDAR R BRIDGE & 276TH AV SE
13831 18th Avenue S
402 29th Street, Auburn, WA
U OF W PUMP BLDG/1960 NE PACIFIC AVE
27519 SE KENT-KANGLEY RD, RAVENSDALE
6605 13th Ave. South
7400 3rd Ave S, Seattle, WA 98108
Ms Elva Finch House
South Seattle Community College Georgetown Campus
S Elm Grove St
2401 S 192ND SEATAC (TYEE VALLEY GOLF COURSE)
2501 S 150TH SEATAC N - BETWEEN 24TH AND 26TH AVENUES
Auburn M St SE
Bellevue-SE 12th St
Concord Elementary School
ENUMCLAW - MUD MTN (Army Corp of Engineers site)
ISSAQUAH - LAKE SAMMAMISH (Wiithin Lake Sammamish State Park)
KENT - JAMES & CENTRAL
LAKE FOREST PARK TOWNE CENTER
NORTH BEND - NORTH BEND WAY
Frequently Asked Questions
What is the air quality in King, Washington?
Based on EPA data from 2024, King has a median Air Quality Index (AQI) of 41, which is classified as "Good." The primary pollutant is PM2.5. Over the past 10 years, air quality has been stable.
Is King a good place to live for air quality?
King has a 10-year average median AQI of 45. In 2024, there were 255 days with "Good" air quality and 3 days with unhealthy conditions. No special precautions are needed for most people.
What pollutants affect King the most?
The primary pollutant driving the AQI in King is PM2.5. This is monitored by 31 active EPA stations in the county. Other pollutants tracked include ozone, PM10, nitrogen dioxide, sulfur dioxide, and carbon monoxide.
How many air quality monitoring stations are in King?
There are 31 active EPA monitoring stations in King, Washington. These stations continuously measure pollutant levels and contribute to the daily AQI calculations.