SmogRank / Italy / Piedmont / Bra

Bra, month by month

Bra has a measured daily mean on 359 days since 29 January 2024. Its worst month was February 2024, at 81 US AQI (25.0 µg/m³), 138th of 2,486 cities on that month's world ranking. Its cleanest was May 2024, at 38 US AQI (6.8 µg/m³).

Every month since 2024

2026too few days for a mean (a year needs 199)145 days measured
Jan3 daysFebnoneMar2 daysApr59#651May17 daysJun19 daysJul60#596Aug61#417Sep20 daysOct62#219
2025too few days for a mean (a year needs 256)116 days measured
JannoneFebnoneMar1 dayApr17 daysMay14 daysJun12 daysJul52#1,283Aug20 daysSep54#571Oct5 daysNovnoneDecnone
2024too few days for a mean (a year needs 257)98 days measured
Jan3 daysFeb81#138Mar11 daysApr47#1,248May38#1,763Jun1 dayJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Bra'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 Bra marked; each year, the year's. A dashed square is the running month, so far.
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

25 months
MonthWhy
Sep 202620 of 30 days measured; a month needs 21. The others: 10 with readings for part of the day (a day needs 18 hours).
Jun 202619 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks.
May 202617 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Mar 20262 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Feb 2026No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 20263 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Dec 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 20255 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks.
Aug 202520 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jun 202512 of 30 days measured; a month needs 21. The others: 18 with under 18 hours of readings or readings that failed our checks.
May 202514 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Apr 202517 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks.
Mar 20251 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Feb 2025No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
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 20241 of 30 days measured; a month needs 21. The others: 29 with under 18 hours of readings or readings that failed our checks.
Mar 202411 of 31 days measured; a month needs 22. The others: 20 with under 18 hours of readings or readings that failed our checks.
Jan 20243 of 31 days measured; a month needs 22.

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

Bra's worst months

MonthUS AQIDays measuredWorld rankEpisode
February 2024 8125.0 µg/m³26 of 29138thof 2,486Italy, Switzerland and France, February 2024
August 2026 6114.2 µg/m³23 of 31417thof 2,896–
July 2026 6014.0 µg/m³27 of 31596thof 2,784–
April 2026 5913.3 µg/m³25 of 30651stof 2,941–
September 2025 5410.9 µg/m³23 of 30571stof 3,104–
July 2025 529.9 µg/m³24 of 311,283rdof 2,889–

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.

Bra's worst days

DayUS AQIEpisode
22 Feb 2024 15459.5 µg/m³Italy, Switzerland and France, February 2024
19 Feb 2024 14151.7 µg/m³Italy, Switzerland and France, February 2024
18 Feb 2024 13449.0 µg/m³Italy, Switzerland and France, February 2024
30 Jan 2024 12444.9 µg/m³–
31 Jan 2024 12444.8 µg/m³–
17 Feb 2024 12344.5 µg/m³Italy, Switzerland and France, February 2024
16 Feb 2024 11942.8 µg/m³Italy, Switzerland and France, February 2024
14 Oct 2025 11942.8 µg/m³Italy and Switzerland, October 2025
29 Jan 2024 11842.5 µg/m³–
22 Jan 2026 10436.9 µg/m³–

Daily means, the highest since 29 Jan 2024; 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, Bra, Italy, 29 Jan 2024 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/it/bra/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.

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

Updated 2026-10-12 17:07 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).