Leechburg, Pennsylvania Air Quality
Leechburg has a median AQI of 42, earning an air quality grade of A- — excellent air quality that ranks better than 44% 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, Leechburg recorded 143 good air quality days (68% of monitored days).
Population: 1,985 • County: Armstrong
Current AQI
Quick Facts
| Current AQI | 13 — Good |
| Air Quality Grade | A- |
| Median AQI (2025) | 42 |
| vs. U.S. Cities | Better than 44% |
| 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 Leechburg is sourced from the Harrison Township monitoring area, located approximately 7 miles from city center. This EPA-certified station continuously tracks particulate matter (PM2.5), the primary driver of air quality alerts in this area.
Leechburg 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
Leechburg Median AQI by Year
Annual EPA air quality data for Leechburg — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2025 | 42 | 143 | — | 93 | PM2.5 |
| 2024 | 41 | 275 | 1 | 108 | Ozone |
| 2023 | 44 | 238 | 7 | 210 | PM2.5 |
| 2022 | 48 | 198 | 2 | 122 | PM2.5 |
| 2021 | 48 | 184 | 1 | 108 | PM2.5 |
| 2020 | 43 | 246 | 3 | 122 | PM2.5 |
| 2019 | 43 | 261 | — | 72 | PM2.5 |
| 2018 | 42 | 245 | 1 | 143 | PM2.5 |
| 2017 | 50 | 182 | — | 93 | PM2.5 |
| 2016 | 53 | 157 | 5 | 119 | 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 Leechburg Air Quality
What is the air quality in Leechburg today?
The current AQI in Leechburg 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 Leechburg getting better or worse?
Air quality in Leechburg has been improving. The median AQI has dropped 11 points (from 53 in 2016 to 42 in 2025), a positive trend for residents.
What is the most common air pollutant in Leechburg?
PM2.5 is the primary air pollutant in Leechburg, responsible for 111 days (53% of monitored days) in 2025. Particulate matter originates from vehicle exhaust, wildfires, construction, and industrial activity.
How many unhealthy air days does Leechburg have per year?
In 2025, Leechburg recorded 68% good air quality days (143 days) out of 210 monitored days. There were 0 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 93.
What air quality grade does Leechburg receive?
Leechburg receives an air quality grade of A-, placing it better than 44% of US cities. This is based on a median AQI of 42 in 2025, with 143 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 44% of US cities
Nearby Cities
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National Rankings
See how Leechburg compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Leechburg
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