Watsonville, CA Air Quality
Report & Trends
Analysis & History
The Verdict
Compared to other metro areas, Watsonville, CA scores exceptionally well.
Historically, December 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 Watsonville, CA safe from particle pollution? The data points to December being the critical month. Despite seasonal fluctuations, year-over-year averages have held steady.
Seasonal Risk Calendar
The "Smoke Season" Calendar
Values represent historical Average Monthly AQI (PM2.5). Higher is worse.
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Common Questions
When is the worst time for air quality in Watsonville, CA?
Based on 10 years of data, the worst months for air quality in Watsonville, CA are: December (AQI 48.0), June (AQI 47.1), November (AQI 43.8). 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 Watsonville, CA given the air quality?
Absolutely. Watsonville, CA 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 Watsonville, CA?
It is holding steady. While some seasons see short-term spikes, the long-term annual average for Watsonville, CA 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 Watsonville, CA?
For daily use, likely not. Watsonville, CA'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 Watsonville, CA 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
As the climate shifts, so does our definition of "Good" air. Watsonville, CA is on the front lines of this change.