What is the air quality trend in Delta?

Over the past 15 days, Delta had an average AQI of 6 based on station measurements. The worst day was 2026-05-22 with AQI 11.

How is Delta air quality measured?

Air quality in Delta 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 Delta, Canada

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

Historical PM2.5 and AQI trend from monitoring stations near Delta, Canada.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

334h

PM2.5 Station

334h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-29	8	3–13	1.9 µg/m³	0.7	22h	2
2026-05-28	8	3–14	1.8 µg/m³	0.7	24h	2
2026-05-27	7	2–25	1.7 µg/m³	0.6	24h	2
2026-05-26	4	1–11	0.9 µg/m³	0.6	24h	2
2026-05-25	9	6–16	2.1 µg/m³	1.0	24h	2
2026-05-24	11	8–15	2.6 µg/m³	1.2	24h	2
2026-05-23	8	2–25	2.0 µg/m³	1.4	24h	2
2026-05-22	11	6–15	2.6 µg/m³	1.0	22h	2
2026-05-21	7	5–11	1.7 µg/m³	0.7	24h	2
2026-05-20	6	4–11	1.5 µg/m³	0.5	24h	2
2026-05-19	8	5–18	2.0 µg/m³	0.8	24h	2
2026-05-18	6	3–14	1.4 µg/m³	0.7	24h	2
2026-05-17	4	2–11	0.9 µg/m³	0.4	24h	2
2026-05-16	3	1–11	0.6 µg/m³	0.4	24h	1
2026-05-15	3	2–4	0.7 µg/m³	0.4	2h	2

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