What is the air quality trend in Arnold?

Over the past 8 days, Arnold had an average AQI of 76 based on station measurements. The worst day was 2026-07-17 with AQI 167.

How is Arnold air quality measured?

Air quality in Arnold 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 Arnold, United States

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

162h

PM2.5 Station

162h · 26 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	24	23–26	5.9 µg/m³	2h	26
2026-07-21	53	28–76	14.7 µg/m³	23h	26
2026-07-20	67	21–85	20.2 µg/m³	24h	24
2026-07-19	62	36–91	18.2 µg/m³	23h	27
2026-07-18	133	59–157	52.3 µg/m³	23h	27
2026-07-17	167	59–230	100.8 µg/m³	24h	27
2026-07-16	58	56–61	15.6 µg/m³	23h	26
2026-07-15	51	45–59	12.8 µg/m³	20h	27

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