Coulter, Pennsylvania Air Quality
Coulter has a median AQI of 49, earning an air quality grade of B+ — good air quality that ranks better than 14% 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, Coulter recorded 94 good air quality days (52% of monitored days) and 2 unhealthy days.
Population: 236 • County: Allegheny
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Quick Facts
| Current AQI | 11 — Good |
| Air Quality Grade | B+ |
| Median AQI (2025) | 49 |
| vs. U.S. Cities | Better than 14% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 2 |
| 10-Year Trend | ↑ Improving |
| Data Source | EPA AirNow |
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 30 Days
Current Pollutant Levels
Real-time data from EPA AirNow
AQI Trend (10 Years)
Air Quality Days by Year
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 Coulter Air Quality
What is the air quality in Coulter today?
The current AQI in Coulter is 11, which is rated "Good". Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Coulter getting better or worse?
Air quality in Coulter has been improving over the past decade. The median AQI dropped from 56 in 2016 to 49 in 2025.
What is the most common air pollutant in Coulter?
PM2.5 is the primary air pollutant in Coulter, responsible for the most air quality-impacted days in 2025. Particulate matter can originate from vehicle exhaust, wildfires, and industrial emissions.
How many unhealthy air days does Coulter have per year?
In 2025, Coulter had 2 days when air quality was unhealthy or unhealthy for sensitive groups (AQI above 100). There were 94 good days and 86 moderate days out of 182 days monitored.
What air quality grade does Coulter receive?
Coulter receives an air quality grade of B+, placing it better than 14% of US cities. This grade is based on a median AQI of 49 for 2025, derived from EPA monitoring data.
Air Quality Grade
Better than 14% of US cities
Nearby Cities
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National Rankings
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Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Coulter
Based on your area's air quality (median AQI: 49), we recommend these air purifiers to help protect your health indoors.
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Molekule Air Pro
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Dyson Pure Cool TP04
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