What is the air quality trend in Hays?

Over the past 8 days, Hays had an average AQI of 52 based on station measurements. The worst day was 2026-07-16 with AQI 66.

How is Hays air quality measured?

Air quality in Hays 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 Hays, United States

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

94h

PM2.5 Station

94h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	49	13–72	13.0 µg/m³	12h	1
2026-07-20	54	21–114	16.0 µg/m³	14h	2
2026-07-19	61	19–148	19.3 µg/m³	11h	2
2026-07-18	65	14–173	22.8 µg/m³	15h	1
2026-07-17	41	13–108	12.4 µg/m³	12h	1
2026-07-16	66	8–244	32.4 µg/m³	14h	1
2026-07-15	28	11–50	6.6 µg/m³	15h	1
2026-07-14	55	55–55	14.0 µg/m³	1h	1

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