What is the air quality trend in Arnold?

Over the past 15 days, Arnold had an average AQI of 59 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

334h

PM2.5 Station

334h · 4 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	22	17–28	5.1 µg/m³	6h	26
2026-07-21	53	28–75	14.6 µg/m³	24h	28
2026-07-20	66	41–80	19.5 µg/m³	24h	28
2026-07-19	61	38–93	17.8 µg/m³	24h	29
2026-07-18	130	59–155	49.1 µg/m³	23h	30
2026-07-17	167	76–226	96.5 µg/m³	24h	30
2026-07-16	66	29–107	19.7 µg/m³	24h	28
2026-07-15	49	37–56	12.2 µg/m³	24h	30
2026-07-14	40	32–51	9.5 µg/m³	24h	28
2026-07-13	37	31–45	9.0 µg/m³	24h	29
2026-07-12	41	28–49	9.8 µg/m³	24h	27
2026-07-11	43	30–51	10.2 µg/m³	24h	23
2026-07-10	42	26–63	10.7 µg/m³	24h	27
2026-07-09	38	26–112	9.5 µg/m³	24h	28
2026-07-08	36	25–47	8.6 µg/m³	17h	30

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