Kwethluk, Alaska Air Quality
Kwethluk has a median AQI of 7, earning an air quality grade of A+ — excellent air quality that ranks better than 99% of US cities. Air quality has been improving steadily over the past decade, a positive sign for residents. Particulate matter (PM10) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2020, Kwethluk recorded 165 good air quality days (99% of monitored days).
Population: 975 • County: Bethel
Current AQI
Quick Facts
| Current AQI | 2 — Good |
| Air Quality Grade | A+ |
| Median AQI (2020) | 7 |
| vs. U.S. Cities | Better than 99% |
| Primary Pollutant | PM10 |
| Unhealthy Days/Year | 0 |
| 10-Year Trend | ↑ Improving |
| Data Source | EPA AQS (historical) · AirNow (live) |
Health Recommendation
Air quality is satisfactory, and air pollution poses little or no risk.
It's a great day to be active outside!
5-Day AQI Forecast
Last 90 Days
Current Pollutant Levels
Real-time data from EPA AirNow
Local Air Quality Context
Air quality data for Kwethluk is sourced from the Port Alberni Elementary monitoring area, located approximately 1625 miles from city center. This EPA-certified station continuously tracks particulate matter (PM10), the primary driver of air quality alerts in this area.
Kwethluk has relatively consistent air quality throughout the year without a strong seasonal peak. Air quality is primarily influenced by local traffic, industrial activity, and regional weather patterns rather than a single seasonal driver.
AQI Trend (10 Years)
Air Quality Days by Year
Kwethluk Median AQI by Year
Annual EPA air quality data for Kwethluk — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2020 | 7 | 165 | — | 56 | PM10 |
| 2019 | 13 | 302 | 2 | 185 | PM2.5 |
| 2018 | 19 | 194 | — | 77 | PM2.5 |
Source: EPA Air Quality System (AQS) annual summaries. "Unhealthy Days" includes Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous categories.
2020 Air Quality Summary
Primary Pollutant Days (2020)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Kwethluk Air Quality
What is the air quality in Kwethluk today?
The current AQI in Kwethluk is 2, rated "Good". Air quality is good — outdoor activity is safe for everyone today. Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Kwethluk getting better or worse?
Air quality in Kwethluk has been improving. The median AQI has dropped 12 points (from 19 in 2018 to 7 in 2020), a positive trend for residents.
What is the most common air pollutant in Kwethluk?
PM10 is the primary air pollutant in Kwethluk, responsible for 137 days (82% of monitored days) in 2020. Particulate matter originates from vehicle exhaust, wildfires, construction, and industrial activity.
How many unhealthy air days does Kwethluk have per year?
In 2020, Kwethluk recorded 99% good air quality days (165 days) out of 167 monitored days. There were 0 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 56.
What air quality grade does Kwethluk receive?
Kwethluk receives an air quality grade of A+, placing it better than 99% of US cities. This is based on a median AQI of 7 in 2020, with 165 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 99% of US cities
Nearby Cities
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National Rankings
See how Kwethluk compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Kwethluk
Kwethluk's primary pollutant is PM10 (coarse dust and pollen). Units with a washable pre-filter stage plus True HEPA handle the larger particles that drive most of this area's air quality days.
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