What is the air quality trend in Highland?

Over the past 3 days, Highland had an average AQI of 45 based on station measurements. The worst day was 2026-10-21 with AQI 55.

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
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

45h

PM2.5 Station

45h · 273 stations

Temperature GFS model

7pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-21	55	52–58	14.0 µg/m³	7.1	4h	275
2026-10-20	52	29–71	13.5 µg/m³	1.1	24h	241
2026-10-19	30	22–41	7.2 µg/m³	3.4	17h	275

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