What is the air quality trend in Johnstone?

Over the past 15 days, Johnstone had an average AQI of 73 based on station measurements. The worst day was 2026-05-20 with AQI 105.

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

333h

PM2.5 Station

333h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	64	14–162	20.0 µg/m³	22h	6
2026-05-28	57	26–104	16.1 µg/m³	24h	6
2026-05-27	64	29–155	19.5 µg/m³	24h	6
2026-05-26	83	40–172	29.0 µg/m³	24h	8
2026-05-25	72	31–170	23.8 µg/m³	24h	8
2026-05-24	72	28–170	24.6 µg/m³	24h	7
2026-05-23	77	25–406	33.5 µg/m³	24h	7
2026-05-22	62	14–140	18.4 µg/m³	24h	8
2026-05-21	70	20–197	28.6 µg/m³	24h	6
2026-05-20	105	20–254	48.9 µg/m³	24h	7
2026-05-19	92	35–160	32.0 µg/m³	24h	8
2026-05-18	73	29–181	24.5 µg/m³	24h	7
2026-05-17	74	40–124	23.4 µg/m³	23h	9
2026-05-16	64	8–127	19.3 µg/m³	22h	9
2026-05-15	69	52–86	20.5 µg/m³	2h	8

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