What is the air quality trend in State College?

Over the past 8 days, State College had an average AQI of 91 based on station measurements. The worst day was 2026-07-17 with AQI 187.

How is State College air quality measured?

Air quality in State College is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for State College, United States

Name: State College Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near State College, United States.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-22	31	28–36	7.3 µg/m³	8.1	4h	2
2026-07-21	71	37–103	21.8 µg/m³	31.2	24h	2
2026-07-20	72	50–90	22.0 µg/m³	30.0	24h	2
2026-07-19	63	1–111	18.1 µg/m³	21.6	23h	1
2026-07-18	137	12–183	69.8 µg/m³	100.5	24h	2
2026-07-17	187	136–246	119.8 µg/m³	172.5	24h	2
2026-07-16	112	32–500	64.4 µg/m³	56.7	24h	2
2026-07-15	56	23–169	17.2 µg/m³	15.0	20h	1

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