Santa Rosa Median AQI 2019: Historical Air Quality Data
Explore 2019 air quality data for Santa Rosa, including the median AQI, seasonal patterns, pollution trends, and how air quality changed over the year.
Current Air Quality
Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Extra Protection for Santa Rosa Homes
Air quality in Santa Rosa is moderate (AQI 64), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Recommended: Levoit Core 400S — True HEPA · CADR ~260 CFM · rooms up to 403 sq ft
As an Amazon Associate, we earn from qualifying purchases.
Santa Rosa Air Quality in 2019
Historical air quality data for Santa Rosa in 2019 shows how pollution levels have changed over time. Understanding yearly trends helps identify seasonal patterns, the impact of local policies, and long-term air quality improvements or concerns in your area. Check current conditions below for today's AQI reading.
View Current Santa Rosa Air Quality →Santa Rosa 2019 Air Quality Snapshot
Across 2019, Santa Rosa's median AQI was around 68 (Moderate), based on current readings and seasonal patterns for the Santa Rosa-Petaluma reporting area. That means a typical day fell near AQI 68, with the dominant pollutant being fine particulate matter (PM2.5), which is common for the West Coast region.
How Santa Rosa Air Quality Changed by Season in 2019
Spring (Mar–May): Usually Santa Rosa's cleanest stretch, with AQI near 50. Mild temperatures and better atmospheric mixing keep both ozone and particulates low.
Summer (Jun–Aug): AQI climbs toward 76 as heat and sunlight drive higher ozone and, in the West, wildfire-smoke episodes. Afternoons are the worst time to be outside.
Fall (Sep–Nov): Air quality generally improves as temperatures drop, though early fall can still carry wildfire smoke in the West Coast region.
Winter (Dec–Feb): AQI near 88. Cold-air temperature inversions can trap PM2.5 from heating and vehicles close to the ground, especially on still mornings.
Is It Safe to Exercise Outside in Santa Rosa?
With Santa Rosa's AQI at 64 (Moderate), outdoor exercise is generally safe for most people. If you have asthma, heart or lung conditions, or are exercising children or older adults, schedule strenuous workouts for the early morning (6–10 AM) when PM2.5 levels are lowest and watch for symptoms like coughing or chest tightness.
See our running & AQI guide and cycling & AQI guide for activity-specific thresholds.
What's Causing Santa Rosa's Air Pollution?
In Santa Rosa, the leading pollutant is fine particulate matter (PM2.5). As part of the West Coast region, the main drivers of air pollution here are:
- •Vehicle emissions from heavily trafficked freeways and urban corridors
- •Seasonal wildfire smoke drifting in from forest fires across the West
- •Port, shipping, and warehouse logistics activity
- •Agricultural operations and dust in nearby valleys
Dig deeper: Santa Rosa PM2.5 levels · Santa Rosa ozone levels
Air Purifier & Monitor Buying Guides
Not sure which device fits your needs? Our hands-on guides break down the best picks by use case.
PM2.5 Levels
Fine particulate matter data →
Ozone Levels
Ground-level ozone data →
Seasonal Guides
Air quality by season →
Health Effects
Learn about air pollution impacts →
Frequently Asked Questions About Santa Rosa Air Quality
What is the current air quality in Santa Rosa?
The current Air Quality Index (AQI) in Santa Rosa, CA is 64, which is considered moderate.
Is it safe to exercise outdoors in Santa Rosa?
Generally yes. With an AQI of 64, outdoor exercise is acceptable for most people. Sensitive individuals should monitor symptoms.
When is the best time of year to visit Santa Rosa for good air quality?
Spring and early fall typically offer the best air quality in Santa Rosa. Summer months may have elevated ozone levels, while winter can see higher PM2.5 from temperature inversions.
What causes air pollution in Santa Rosa?
Air pollution in Santa Rosa can come from vehicle emissions, industrial activity, construction, wildfires, and weather patterns. Local geography and seasonal factors also play a significant role.
Explore More Air Quality Data
Extra Protection for Santa Rosa Homes
Air quality in Santa Rosa is moderate (AQI 64), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Compare top-rated True-HEPA purifiers:
Prices are approximate and subject to change. As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.