Keene, NH Air Quality
Report & Trends
Analysis & History
The Verdict
This places Keene, NH in the top 19% of US cities for air quality.
You are most likely to need an air purifier in February, when historical averages peak.
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.
Compared to national averages, Keene, NH has a unique air quality profile driven by seasonal changes. Since 2015, particle pollution days have trended downward, signaling a positive shift in local air hygiene.
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 Keene, NH?
Based on 10 years of data, the worst months for air quality in Keene, NH are: February (AQI 44.4), July (AQI 43.5), August (AQI 42.0). 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 Keene, NH given the air quality?
Absolutely. Keene, NH 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.
Is the air quality in Keene, NH improving?
Yes. Our 10-year analysis shows a positive trend. Despite regional wildfire challenges, average particulate levels in Keene, NH have decreased, likely due to favorable weather patterns and reduced local emissions.
Do I really need an air purifier in Keene, NH?
For daily use, likely not. Keene, NH'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 Keene, NH 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. Keene, NH has a bright future, provided its families take air quality seriously.