SmogRank / Spain / Castille and León / Soria

Soria, month by month

Soria has a measured daily mean on 398 days since 1 January 2025. Its worst month was August 2025, at 61 US AQI (14.2 µg/m³), 423rd of 2,901 cities on that month's world ranking. Its cleanest was January 2026, at 18 US AQI (3.3 µg/m³).

Every month since 2025

2026too few days for a mean (a year needs 200)102 days measured
Jan18#2,560Feb8 daysMarnoneAprnoneMay1 dayJun9 daysJul18 daysAug20 daysSep14 daysOct6 days
202538 for the year296 days measured2,154th of 2,681 in the world
Jan29#2,175Feb17 daysMar17 daysApr39#2,033May30#2,165Jun52#1,326Jul43#1,824Aug61#423Sep31#2,344Oct24#2,312Nov19#2,622Dec27#2,719
Each square is a month's mean PM2.5 in US AQI from Soria'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 Soria 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

11 months
MonthWhy
Oct 20266 of 12 days measured; a month needs 9. The others: 3 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours), 1 with under 18 hours of readings or readings that failed our checks.
Sep 202614 of 30 days measured; a month needs 21. The others: 16 with readings for part of the day (a day needs 18 hours).
Aug 202620 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
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 20261 of 31 days measured; a month needs 22. The others: 30 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.
Mar 202517 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Feb 202517 of 28 days measured; a month needs 20. The others: 11 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.

Soria's worst months

MonthUS AQIDays measuredWorld rankEpisode
August 2025 6114.2 µg/m³31 of 31423rdof 2,901Spain, Portugal and Andorra, August 2025
June 2025 529.9 µg/m³21 of 301,326thof 2,508–
July 2025 437.8 µg/m³31 of 311,824thof 2,889–
April 2025 397.0 µg/m³22 of 302,033rdof 2,951–
September 2025 315.5 µg/m³28 of 302,344thof 3,104–
May 2025 305.4 µg/m³25 of 312,165thof 2,826–

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.

Soria's worst days

DayUS AQIEpisode
17 Aug 2025 9230.9 µg/m³Spain, Portugal and Andorra, August 2025
2 Jul 2025 9130.6 µg/m³–
19 Jul 2026 8929.7 µg/m³–
16 Aug 2025 8326.3 µg/m³Spain, Portugal and Andorra, August 2025
18 Aug 2025 8225.7 µg/m³Spain, Portugal and Andorra, August 2025
27 Aug 2025 7823.5 µg/m³–
1 Jan 2025 7421.4 µg/m³–
29 Aug 2025 7320.7 µg/m³–
17 Jul 2026 7119.8 µg/m³–
15 Aug 2026 6918.9 µg/m³–

Daily means, the highest since 1 Jan 2025; 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, Soria, Spain, 1 Jan 2025 – 8 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/es/soria/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.

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

Updated 2026-10-12 21:07 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).