Allegheny, Pennsylvania Air Quality

Allegheny County, Pennsylvania (PA)

→ Stableover 10 years

Air Quality Grade

54/100

Current Median AQI

Moderate

5-Year Avg AQI

-2

10-Year Change

Better

Unhealthy Days/yr

5-year average

PM2.5

Primary Pollutant

Fine Particulate Matter (PM2.5)

10-Year AQI Trend

The solid line shows the median AQI each year. The dashed line shows the 90th percentile (worst 10% of days).

Air Quality Day Breakdown

Number of days per year in each EPA AQI category. Green = Good (AQI 0-50), Yellow = Moderate (51-100), Orange = Unhealthy for Sensitive Groups (101-150), Red = Unhealthy or worse (151+).

Year-by-Year Data

Year	Median AQI	90th Pct	Max AQI	Good Days	Moderate	Unhealthy+	Pollutant
2023	56	84	237	121	227	17	PM2.5
2022	56	84	151	129	225	11	PM2.5
2021	57	84	154	118	240	7	PM2.5
2020	54	77	128	138	218	10	PM2.5
2019	59	80	165	67	287	11	PM2.5
2018	58	84	154	92	260	13	PM2.5
2017	58	87	168	111	235	19	PM2.5
2016	56	84	152	103	243	20	PM2.5
2015	58	90	157	105	241	19	PM2.5
2014	58	80	157	99	256	10	PM2.5

What This Means for Allegheny County Residents

Allegheny, Pennsylvania has received an Air Quality Grade of C (54/100) based on a decade of EPA monitoring data. The current median AQI of 56 falls in the "Moderate" range.

The primary pollutant affecting this area is Fine Particulate Matter (PM2.5). Over the past 5 years, this area has averaged 11 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.