What is the air quality trend in Highland?

Over the past 8 days, Highland had an average AQI of 104 based on station measurements. The worst day was 2026-07-17 with AQI 234.

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

167h

PM2.5 Station

167h · 4 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	65	32–98	19.5 µg/m³	21h	243
2026-07-20	100	62–107	34.9 µg/m³	24h	247
2026-07-19	111	59–160	40.8 µg/m³	24h	258
2026-07-18	50	33–88	12.8 µg/m³	24h	258
2026-07-17	234	69–362	180.3 µg/m³	24h	272
2026-07-16	158	51–329	103.1 µg/m³	24h	251
2026-07-15	59	51–190	18.3 µg/m³	24h	262
2026-07-14	60	59–60	16.2 µg/m³	2h	274

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