What is the air quality trend in Four Corners?

Over the past 8 days, Four Corners had an average AQI of 16 based on station measurements. The worst day was 2026-05-22 with AQI 20.

How is Four Corners air quality measured?

Air quality in Four Corners 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 Four Corners, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 14 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-28	19	15–23	4.6 µg/m³	20h	15
2026-05-27	15	11–25	3.6 µg/m³	24h	13
2026-05-26	12	9–23	2.9 µg/m³	24h	14
2026-05-25	18	13–25	4.2 µg/m³	24h	14
2026-05-24	18	12–30	4.4 µg/m³	24h	13
2026-05-23	14	10–18	3.4 µg/m³	24h	13
2026-05-22	20	13–25	4.9 µg/m³	24h	14
2026-05-21	18	15–20	4.1 µg/m³	2h	12

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