SmogRank / France / Hauts-de-France / Harnes

Harnes, month by month

Harnes has a measured daily mean on 96 days since 1 December 2023. Its worst month was January 2024, at 54 US AQI (10.8 µg/m³), 804th of 2,385 cities on that month's world ranking. Its cleanest was February 2024, at 28 US AQI (5.1 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 200)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnone
2025too few days for a mean (a year needs 256)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
2024too few days for a mean (a year needs 257)65 days measured
Jan54#804Feb28#2,109Mar10 daysApr2 daysMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
2023too few days for a mean (a year needs 256)31 days measured
JanFebMarAprMayJunJulAugSepOctNovDec43#1,346
Each square is a month's mean PM2.5 in US AQI from Harnes'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 Harnes 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

32 months
MonthWhy
Oct 2026No day measured.
Sep 2026No day measured.
Aug 2026No day measured.
Jul 2026No day measured.
Jun 2026No day measured.
May 2026No day measured.
Apr 2026No day measured.
Mar 2026No day measured.
Feb 2026No day measured.
Jan 2026No day measured.
Dec 2025No day measured.
Nov 2025No day measured.
Oct 2025No day measured.
Sep 2025No day measured.
Aug 2025No day measured.
Jul 2025No day measured.
Jun 2025No day measured.
May 2025No day measured.
Apr 2025No day measured.
Mar 2025No day measured.
Feb 2025No day measured.
Jan 2025No day measured.
Dec 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 20242 of 30 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks.
Mar 202410 of 31 days measured; a month needs 22. The others: 21 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.

Harnes's worst months

MonthUS AQIDays measuredWorld rankEpisode
January 2024 5410.8 µg/m³29 of 31804thof 2,385Europe, 8 to 27 January 2024
December 2023 437.7 µg/m³31 of 311,346thof 2,247–
February 2024 285.1 µg/m³24 of 292,109thof 2,486–

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.

Harnes's worst days

DayUS AQIEpisode
11 Jan 2024 9331.7 µg/m³Europe, 8 to 27 January 2024
7 Mar 2024 7923.9 µg/m³–
2 Dec 2023 7823.4 µg/m³–
1 Dec 2023 7421.7 µg/m³–
18 Jan 2024 7421.6 µg/m³Europe, 8 to 27 January 2024
14 Jan 2024 7019.2 µg/m³Europe, 8 to 27 January 2024
12 Jan 2024 6818.3 µg/m³Europe, 8 to 27 January 2024
10 Jan 2024 6617.0 µg/m³Europe, 8 to 27 January 2024
17 Jan 2024 6516.6 µg/m³Europe, 8 to 27 January 2024
13 Jan 2024 6416.1 µg/m³Europe, 8 to 27 January 2024

Daily means, the highest since 1 Dec 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, Harnes, France, 1 Dec 2023 – 12 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/fr/harnes/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.

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

Updated 2026-10-12 22:07 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).