What is the air quality trend in Fort St. John?

Over the past 17 days, Fort St. John had an average AQI of 48 based on station measurements. The worst day was 2026-07-21 with AQI 259.

How is Fort St. John air quality measured?

Air quality in Fort St. John 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 Fort St. John, Canada

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

Historical PM2.5 and AQI trend from monitoring stations near Fort St. John, Canada.

241

Current AQI
Very unhealthy Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

237h

PM2.5 Station

237h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-21	259	229–294	209.1 µg/m³	241.3	16h	1
2026-07-20	157	97–226	81.2 µg/m³	94.2	23h	1
2026-07-19	98	27–282	51.8 µg/m³	59.2	24h	1
2026-07-18	56	31–72	15.3 µg/m³	16.8	24h	1
2026-07-17	47	15–68	12.6 µg/m³	14.8	24h	1
2026-07-16	68	45–85	20.4 µg/m³	23.0	24h	1
2026-07-15	29	4–78	8.0 µg/m³	9.2	21h	1
2026-07-14	20	6–38	4.9 µg/m³	5.8	20h	1
2026-07-13	4	4–4	1.0 µg/m³	1.0	1h	1
2026-07-12	5	2–8	1.1 µg/m³	1.6	6h	1
2026-07-11	5	4–6	1.2 µg/m³	1.3	2h	1
2026-07-08	13	3–23	3.1 µg/m³	3.8	3h	1
2026-07-07	8	1–24	1.9 µg/m³	2.2	18h	1
2026-07-06	5	4–10	1.3 µg/m³	1.2	6h	2
2026-07-05	18	1–92	5.0 µg/m³	6.1	14h	1
2026-07-02	17	4–32	4.0 µg/m³	4.4	4h	2
2026-07-01	13	2–43	3.1 µg/m³	4.0	7h	1

Back to Fort St. John Air Quality