What is the air quality trend in Highland?

Over the past 7 days, Highland had an average AQI of 28 based on station measurements. The worst day was 2026-10-20 with AQI 52.

How is Highland air quality measured?

Air quality in Highland 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 Highland, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 270 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-20	52	28–71	13.7 µg/m³	1.1	24h	240
2026-10-19	28	22–41	6.7 µg/m³	3.4	24h	273
2026-10-18	23	17–35	5.4 µg/m³	—	24h	251
2026-10-17	16	13–23	3.9 µg/m³	4.5	24h	273
2026-10-16	19	10–40	4.6 µg/m³	1.1	24h	261
2026-10-15	24	13–42	5.7 µg/m³	1.6	24h	273
2026-10-14	37	18–52	9.0 µg/m³	1.5	21h	272

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