What is the air quality trend in Johnstone?

Over the past 8 days, Johnstone had an average AQI of 49 based on station measurements. The worst day was 2026-07-17 with AQI 60.

How is Johnstone air quality measured?

Air quality in Johnstone 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 Johnstone, United Kingdom

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

Historical PM2.5 and AQI trend from monitoring stations near Johnstone, United Kingdom.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	37	18–56	9.1 µg/m³	4h	12
2026-07-21	44	24–97	11.3 µg/m³	24h	28
2026-07-20	46	21–133	12.4 µg/m³	24h	24
2026-07-19	42	26–58	10.2 µg/m³	24h	25
2026-07-18	56	33–151	15.8 µg/m³	24h	23
2026-07-17	60	20–162	17.7 µg/m³	24h	23
2026-07-16	53	31–81	14.0 µg/m³	24h	23
2026-07-15	58	39–118	15.6 µg/m³	19h	20

Back to Johnstone Air Quality