Redwood Valley, California Air Quality
Redwood Valley has a median AQI of 43, earning an air quality grade of A- — excellent air quality that ranks better than 39% of US cities. Air quality has been trending worse over the past decade, a concern for local residents and health officials. Particulate matter (PM2.5) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2024, Redwood Valley recorded 244 good air quality days (67% of monitored days).
Population: 1,898 • County: Mendocino
Current AQI
Quick Facts
| Current AQI | 29 — Good |
| Air Quality Grade | A- |
| Median AQI (2024) | 43 |
| vs. U.S. Cities | Better than 39% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 0 |
| 10-Year Trend | ↓ Worsening |
| 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 Redwood Valley is sourced from the Ukiah Library monitoring area, located approximately 8 miles from city center. This EPA-certified station continuously tracks particulate matter (PM2.5), the primary driver of air quality alerts in this area.
Wildfire smoke is a significant factor in Redwood Valley's air quality, with regional fires capable of pushing AQI from Good to Unhealthy within hours during fire season (typically July through October). On smoke-impacted days, staying indoors with windows closed and running an air purifier with a HEPA filter is the most effective protection.
AQI Trend (10 Years)
Air Quality Days by Year
Redwood Valley Median AQI by Year
Annual EPA air quality data for Redwood Valley — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2024 | 43 | 244 | — | 83 | PM2.5 |
| 2023 | 53 | 144 | 5 | 140 | PM2.5 |
| 2022 | 54 | 129 | 2 | 103 | PM2.5 |
| 2021 | 46 | 210 | 8 | 185 | PM2.5 |
| 2020 | 40 | 240 | 23 | 716 | PM2.5 |
| 2019 | 36 | 290 | — | 80 | PM2.5 |
| 2018 | 46 | 217 | 21 | 376 | PM2.5 |
| 2017 | 45 | 226 | 8 | 203 | PM2.5 |
| 2016 | 39 | 287 | — | 70 | PM2.5 |
Source: EPA Air Quality System (AQS) annual summaries. "Unhealthy Days" includes Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous categories.
2024 Air Quality Summary
Primary Pollutant Days (2024)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Redwood Valley Air Quality
What is the air quality in Redwood Valley today?
The current AQI in Redwood Valley is 29, 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 Redwood Valley getting better or worse?
Air quality in Redwood Valley has been worsening. The median AQI has risen 4 points (from 39 in 2016 to 43 in 2024), a concern for local health officials.
What is the most common air pollutant in Redwood Valley?
PM2.5 is the primary air pollutant in Redwood Valley, responsible for 265 days (72% of monitored days) in 2024. Particulate matter originates from vehicle exhaust, wildfires, construction, and industrial activity.
How many unhealthy air days does Redwood Valley have per year?
In 2024, Redwood Valley recorded 67% good air quality days (244 days) out of 366 monitored days. There were 0 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 83.
What air quality grade does Redwood Valley receive?
Redwood Valley receives an air quality grade of A-, placing it better than 39% of US cities. This is based on a median AQI of 43 in 2024, with 244 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 39% of US cities
Nearby Cities
Get AQI Alerts
Receive notifications when air quality changes in Redwood Valley
National Rankings
See how Redwood Valley compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Redwood Valley
Redwood Valley faces elevated PM2.5 from wildfire smoke in addition to year-round traffic and industrial sources. We prioritize True HEPA units with high smoke CADR — essential for rapid air cleaning during smoke events.
Blueair Blue Pure 211+
High performance for large rooms with simple operation.
- ✓Good room size match
- ✓Recommended for your air quality
- ✓High performance
We may earn a commission from purchases
Other Great Options
Molekule Air Pro
Commercial-grade with patented PECO technology for destroying pollutants.
Honeywell HPA300
Powerful workhorse for large rooms. Built to last.
Coway Airmega AP-1512HH
Best overall value for medium rooms. Excellent performance at an affordable price.
Not sure which air purifier is right for you?
Learn more about different types of air purifiers and how to choose the best one for your needs.
Read our complete buying guide →