Terrace Heights, Washington Air Quality
Terrace Heights has a median AQI of 34, earning an air quality grade of A — excellent air quality that ranks better than 84% of US cities. Air quality has been improving steadily over the past decade, a positive sign for residents. Particulate matter (PM2.5) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2025, Terrace Heights recorded 197 good air quality days (81% of monitored days).
Population: 10,041 • County: Yakima
Current AQI
Quick Facts
| Current AQI | 22 — Good |
| Air Quality Grade | A |
| Median AQI (2025) | 34 |
| vs. U.S. Cities | Better than 84% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 0 |
| 10-Year Trend | ↑ Improving |
| 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 Terrace Heights is sourced from the Yakima-4th Ave monitoring area, located approximately 4 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 Terrace Heights'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
Terrace Heights Median AQI by Year
Annual EPA air quality data for Terrace Heights — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2025 | 34 | 197 | — | 87 | PM2.5 |
| 2024 | 37 | 248 | 7 | 153 | PM2.5 |
| 2023 | 46 | 203 | 4 | 233 | PM2.5 |
| 2022 | 51 | 178 | 6 | 158 | PM2.5 |
| 2021 | 52 | 175 | 27 | 210 | PM2.5 |
| 2020 | 46 | 198 | 15 | 743 | PM2.5 |
| 2019 | 51 | 178 | 10 | 127 | PM2.5 |
| 2018 | 52 | 173 | 16 | 239 | PM2.5 |
| 2017 | 48 | 193 | 29 | 317 | PM2.5 |
| 2016 | 44 | 211 | 12 | 199 | PM2.5 |
Source: EPA Air Quality System (AQS) annual summaries. "Unhealthy Days" includes Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous categories.
2025 Air Quality Summary
Primary Pollutant Days (2025)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Terrace Heights Air Quality
What is the air quality in Terrace Heights today?
The current AQI in Terrace Heights is 22, 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 Terrace Heights getting better or worse?
Air quality in Terrace Heights has been improving. The median AQI has dropped 10 points (from 44 in 2016 to 34 in 2025), a positive trend for residents.
What is the most common air pollutant in Terrace Heights?
PM2.5 is the primary air pollutant in Terrace Heights, responsible for 211 days (87% of monitored days) in 2025. Particulate matter originates from vehicle exhaust, wildfires, construction, and industrial activity.
How many unhealthy air days does Terrace Heights have per year?
In 2025, Terrace Heights recorded 81% good air quality days (197 days) out of 243 monitored days. There were 0 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 87.
What air quality grade does Terrace Heights receive?
Terrace Heights receives an air quality grade of A, placing it better than 84% of US cities. This is based on a median AQI of 34 in 2025, with 197 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 84% of US cities
Nearby Cities
Get AQI Alerts
Receive notifications when air quality changes in Terrace Heights
National Rankings
See how Terrace Heights compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Terrace Heights
Terrace Heights 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 →