SmogRank / Spain / Basque Country / Bermeo

Bermeo, month by month

Bermeo has a measured daily mean on 945 days since 11 January 2023. Its worst month was February 2023, at 47 US AQI (8.5 µg/m³), 772nd of 1,129 cities on that month's world ranking. Its cleanest was January 2026, at 13 US AQI (2.4 µg/m³). 2025 averaged 27 US AQI (4.8 µg/m³), against 34 US AQI (6.1 µg/m³) in 2023.

Every month since 2023

2026too few days for a mean (a year needs 200)120 days measured
Jan13#2,599Feb8 daysMarnoneAprnoneMay2 daysJun9 daysJul18 daysAug32#2,570Sep31#2,060Oct7 days
202527 for the year297 days measured2,559th of 2,681 in the world
Jan17#2,442Feb33#2,128Mar20#2,723Apr24#2,713May31#2,135Jun20 daysJul32#2,420Aug34#2,476Sep25#2,806Oct29#1,916Nov17#2,657Dec19#2,907
2024too few days for a mean (a year needs 257)221 days measured
Jan25#2,178Feb28#2,109Mar14 daysApr22#2,259May22#2,440Jun9 daysJul13 daysAug7 daysSepnoneOct12 daysNov28#2,271Dec22#2,454
202334 for the year307 days measured1,167th of 1,355 in the world
Jan7 daysFeb47#772Mar36#675Apr29#1,315May39#1,122Jun45#1,095Jul43#881Aug21 daysSep37#1,597Oct26#1,841Nov15#2,220Dec18#2,195
Each square is a month's mean PM2.5 in US AQI from Bermeo'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 Bermeo 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

16 months
MonthWhy
Oct 20267 of 12 days measured; a month needs 9. The others: 2 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours).
Jul 202618 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Jun 20269 of 30 days measured; a month needs 21. The others: 21 with under 18 hours of readings or readings that failed our checks.
May 20262 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Apr 2026No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Feb 20268 of 28 days measured; a month needs 20. The others: 20 with under 18 hours of readings or readings that failed our checks.
Jun 202520 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks.
Oct 202412 of 31 days measured; a month needs 22. The others: 19 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 20247 of 31 days measured; a month needs 22. The others: 24 with under 18 hours of readings or readings that failed our checks.
Jul 202413 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks.
Jun 20249 of 30 days measured; a month needs 21. The others: 21 with under 18 hours of readings or readings that failed our checks.
Mar 202414 of 31 days measured; a month needs 22. The others: 17 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.
Jan 20237 of 31 days measured; a month needs 22. The others: 14 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.

Bermeo's worst months

MonthUS AQIDays measuredWorld rank
February 2023 478.5 µg/m³26 of 28772ndof 1,129
June 2023 458.1 µg/m³27 of 301,095thof 1,603
July 2023 437.8 µg/m³28 of 31881stof 1,432
May 2023 397.1 µg/m³31 of 311,122ndof 1,600
September 2023 376.7 µg/m³24 of 301,597thof 2,176
March 2023 366.5 µg/m³31 of 31675thof 911

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.

Bermeo's worst days

DayUS AQI
5 Sept 2023 7521.9 µg/m³
30 May 2023 7120.0 µg/m³
24 Jun 2026 7119.6 µg/m³
19 Feb 2023 7019.3 µg/m³
25 Jun 2026 7019.2 µg/m³
22 Feb 2023 6919.0 µg/m³
10 Jun 2025 6919.0 µg/m³
5 Mar 2023 6918.9 µg/m³
23 Jun 2026 6918.7 µg/m³
21 Feb 2023 6818.2 µg/m³

Daily means, the highest since 11 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, Bermeo, Spain, 11 Jan 2023 – 9 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/es/bermeo/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.

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

Updated 2026-10-12 23:07 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).