The Dalles, OR Air Quality
Report & Trends
Analysis & History
The Verdict
This places The Dalles, OR in the top 6% of US cities for air quality.
Historically, January brings the highest volume of particulate matter.
Health Recommendation
Sensitive groups should consider monitoring daily forecast apps significantly closer.
10-Year Annual PM2.5 Average
Analysis: Annual average Median AQI from 2015 to 2025.
Is The Dalles, OR safe from particle pollution? The data points to January being the critical month. Despite seasonal fluctuations, year-over-year averages have plateaued.
Seasonal Risk Calendar
The "Smoke Season" Calendar
Values represent historical Average Monthly AQI (PM2.5). Higher is worse.
Calculate Your Wildfire Defense
Don't guess. Enter your room size to see exactly which machine clears smoke in 15 minutes.
Coway AP-1512HH
The industry standard. Perfect for living rooms.
Wildfire smoke is 2.5 microns wide—too small for normal filters. Using an undersized purifier is dangerous false security.
Common Questions
When is the worst time for air quality in The Dalles, OR?
Based on 10 years of data, the worst months for air quality in The Dalles, OR are: January (AQI 42.7), August (AQI 39.5), November (AQI 36.4). These months typically see the highest concentrations of PM2.5 due to fine particulate matter trapped by local geography.
Is it safe to move to The Dalles, OR given the air quality?
Absolutely. The Dalles, OR has some of the cleanest air in the country. While no place is immune to occasional regional smoke, the long-term data shows it is a safe and healthy environment for residents.
How is the air quality changing in The Dalles, OR?
It is holding steady. While some seasons see short-term spikes, the long-term annual average for The Dalles, OR has remained consistent over the last decade, avoiding the sharp declines seen in other parts of the region.
Do I really need an air purifier in The Dalles, OR?
For daily use, likely not. The Dalles, OR's air quality consistently rates as "Good." However, owning one as a precaution for wildfire season or allergy relief is still a smart decision for sensitive groups.
How accurate is this data?
This report is built on official EPA Air Quality System (AQS) data. We aggregated daily summary files from 2014 to present to build these charts. Unlike real-time apps that estimate, this is the verified historical record.
Is The Dalles, OR safe from other disasters?
Air quality is just one factor. Check our sister site for a complete analysis of tornado, hurricane, and flood risks.
Full Safety Report →Summary
This report isn't meant to scare, but to prepare. The Dalles, OR has a bright future, provided its residents take air quality seriously.