Air quality in Chilliwack, British Columbia, Canada today

Mr. Duck’s Air Quality Score

Good air today for Chilliwack, British Columbia, Canada

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Chilliwack today is classified as Good. The primary pollutant measured is PM2.5 (fine particles). Twelve valid measurements were recorded, showing a PM2.5 reference value of 1.2 and a PM10 reference value of 3.0.

Overall conditions meet the Good category criteria based on the available data. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.

Latest sensor values

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

What the data includes

The dataset for Chilliwack pulls from two monitoring sites and contains twelve recent rows of observations across a suite of pollutants. All measurements were recorded at the same moment – 2026‑02‑10 22:00 UTC – so the data are uniformly fresh, falling well within the three‑day update window that OpenAQ uses for “recent” records.

The available parameters include carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), ozone (O₃), sulfur dioxide (SO₂), particulate matter of three size fractions (PM1, PM2.5 and PM10), as well as relative humidity and temperature, although the latter two are not listed in the numeric summary. For each pollutant a single value is reported because every row shares the same timestamp. CO is measured at 0.1 ppm, NO at 0.0013 ppm, NO₂ at 0.0015 ppm, O₃ at 0.02 ppm and SO₂ at 0.0003 ppm – all identical across the twelve rows. Particulate matter shows a broader spread: PM2.5 ranges from 0.0 to 1.2 µg/m³ with a median of 0.6 µg/m³, while PM10 is constant at 3.0 µg/m³ and PM1 registers only zeroes at the Vedder Crossing location.

Because each pollutant appears in exactly one row per station, the coverage is uneven: the gaseous species are represented by a single reading per site, whereas PM2.5 provides a modest range that hints at variability even within this limited snapshot. The uniform timestamp means there are no older or unknown‑age records in the current set, but the small number of stations (two) and rows (twelve) suggests that city‑wide conditions could differ elsewhere or at other times. Users should keep in mind that these figures capture a specific moment rather than a continuous trend.

Learn more about sources and filtering: About the data.

Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)

Latest sensor values (bars)

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

Data notes

The data shown for Chilliwack reflects twelve valid measurements and is updated within three days, with the most recent update recorded at 2026‑02‑10 22:00 UTC. This snapshot provides a current view of ambient conditions but air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows