SmogRank / Canada / British Columbia / Harewood

Harewood, month by month

Harewood has a measured daily mean on 1,145 days since 1 January 2023. Its worst month was January 2023, at 49 US AQI (8.8 µg/m³), 596th of 1,261 cities on that month's world ranking. Its cleanest was June 2025, at 21 US AQI (3.7 µg/m³). 2025 averaged 26 US AQI (4.7 µg/m³), against 31 US AQI (5.5 µg/m³) in 2024.

Every month since 2023

202632 so far256 days measured2,543rd of 2,791 in the world
Jan49#1,289Feb30#2,540Mar22#2,809Apr37#1,984May27#2,385Jun22#2,317Jul27#2,617Aug37#2,212Sep34#1,641Oct4 days
202526 for the year281 days measured2,574th of 2,681 in the world
Jan2 daysFeb27#2,415Mar23#2,643Apr33#2,309May22#2,600Jun21#2,435Jul22#2,771Aug28#2,697Sep28#2,600Oct13 daysNov38#1,879Dec22#2,855
202431 for the year330 days measured1,883rd of 2,097 in the world
Jan26#2,133Feb43#1,168Mar33#1,175Apr23#2,189May22#2,455Jun23#2,366Jul32#2,033Aug29#1,850Sep25#1,862Oct37#1,236Nov36#1,874Dec9 days
202337 for the year278 days measured1,102nd of 1,355 in the world
Jan49#596Feb1 dayMar8 daysApr32#1,241May46#885Jun26#1,443Jul24#1,304Aug21 daysSep26#2,025Oct37#1,230Nov47#1,028Dec28#2,019
Each square is a month's mean PM2.5 in US AQI from Harewood's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Harewood marked; each year, the year's.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Months without a mean, and why

7 months
MonthWhy
Oct 20264 of 11 days measured; a month needs 8. The others: 6 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours).
Oct 202513 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks.
Jan 20252 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Dec 20249 of 31 days measured; a month needs 22. The others: 22 with under 18 hours of readings or readings that failed our checks.
Aug 202321 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Mar 20238 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive, 3 with under 18 hours of readings or readings that failed our checks.
Feb 20231 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 2 with under 18 hours of readings or readings that failed our checks.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Harewood's worst months

MonthUS AQIDays measuredWorld rank
January 2023 498.8 µg/m³23 of 31596thof 1,261
January 2026 498.8 µg/m³26 of 311,289thof 2,617
November 2023 478.4 µg/m³30 of 301,028thof 2,243
May 2023 468.2 µg/m³31 of 31885thof 1,600
February 2024 437.8 µg/m³28 of 291,168thof 2,486
November 2025 386.9 µg/m³21 of 301,879thof 2,715

Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.

Harewood's worst days

DayUS AQIEpisode
27 Aug 2023 8929.6 µg/m³North-western United States and Canada, August 2023
29 Jan 2023 8326.5 µg/m³–
26 Aug 2023 8225.6 µg/m³North-western United States and Canada, August 2023
16 Feb 2024 7924.1 µg/m³–
30 May 2023 7522.1 µg/m³–
18 Jan 2026 7421.6 µg/m³–
22 Jul 2026 7421.3 µg/m³–
31 Oct 2024 7321.0 µg/m³–
8 May 2023 7119.9 µg/m³–
28 Aug 2023 6918.8 µg/m³North-western United States and Canada, August 2023

Daily means, the highest since 1 Jan 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Harewood, Canada, 1 Jan 2023 – 4 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/ca/harewood/history (accessed 12 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Harewood now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 18:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).