What is the air quality trend in Crystal?

Over the past 7 days, Crystal had an average AQI of 91 based on station measurements. The worst day was 2026-07-16 with AQI 232.

How is Crystal air quality measured?

Air quality in Crystal 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 Crystal, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Crystal, 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 · 6 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	57	33–70	15.5 µg/m³	24h	18
2026-07-20	71	28–109	22.2 µg/m³	24h	17
2026-07-19	89	51–130	30.1 µg/m³	24h	18
2026-07-18	60	25–74	16.8 µg/m³	24h	18
2026-07-17	73	47–118	22.5 µg/m³	24h	20
2026-07-16	232	44–339	177.1 µg/m³	24h	18
2026-07-15	55	38–151	14.8 µg/m³	23h	9

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