Easton, Pennsylvania Air Quality
Easton has a median AQI of 39, earning an air quality grade of A — excellent air quality that ranks better than 65% 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, Easton recorded 150 good air quality days (71% of monitored days) and 1 unhealthy days.
Population: 29,739 • County: Northampton
Current AQI
Quick Facts
| Current AQI | 13 — Good |
| Air Quality Grade | A |
| Median AQI (2025) | 39 |
| vs. U.S. Cities | Better than 65% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 1 |
| 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 Easton is sourced from the Freemansburg 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.
Easton has relatively consistent air quality throughout the year without a strong seasonal peak. Air quality is primarily influenced by local traffic, industrial activity, and regional weather patterns rather than a single seasonal driver.
AQI Trend (10 Years)
Air Quality Days by Year
Easton Median AQI by Year
Annual EPA air quality data for Easton — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2025 | 39 | 150 | 1 | 122 | PM2.5 |
| 2024 | 39 | 278 | 1 | 105 | Ozone |
| 2023 | 46 | 209 | 7 | 368 | PM2.5 |
| 2022 | 45 | 224 | 2 | 118 | PM2.5 |
| 2021 | 45 | 214 | 4 | 148 | PM2.5 |
| 2020 | 41 | 260 | 1 | 117 | PM2.5 |
| 2019 | 44 | 238 | 3 | 114 | PM2.5 |
| 2018 | 48 | 194 | 5 | 136 | PM2.5 |
| 2017 | 56 | 105 | 1 | 119 | PM2.5 |
| 2016 | 53 | 153 | 10 | 242 | 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 Easton Air Quality
What is the air quality in Easton today?
The current AQI in Easton is 13, 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 Easton getting better or worse?
Air quality in Easton has been improving. The median AQI has dropped 14 points (from 53 in 2016 to 39 in 2025), a positive trend for residents.
What is the most common air pollutant in Easton?
PM2.5 is the primary air pollutant in Easton, responsible for 107 days (50% of monitored days) in 2025. Particulate matter originates from vehicle exhaust, wildfires, construction, and industrial activity.
How many unhealthy air days does Easton have per year?
In 2025, Easton recorded 71% good air quality days (150 days) out of 212 monitored days. There were 1 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 122.
What air quality grade does Easton receive?
Easton receives an air quality grade of A, placing it better than 65% of US cities. This is based on a median AQI of 39 in 2025, with 150 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 65% of US cities
Nearby Cities
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National Rankings
See how Easton compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Easton
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