SmogRank / Latvia / Liepaja / Liepāja

Liepāja, month by month

Liepāja has a measured daily mean on 792 days since 11 January 2023. Its worst month was February 2026, at 80 US AQI (24.6 µg/m³), 393rd of 2,866 cities on that month's world ranking. Its cleanest was April 2026, at 37 US AQI (6.6 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 200)180 days measured
Jan70#471Feb80#393Mar78#482Apr37#2,009May20 daysJun12 daysJul13 daysAug10 daysSep11 daysOct24#2,386
202558 for the year322 days measured552nd of 2,681 in the world
Jan61#533Feb78#329Mar78#457Apr60#606May54#778Jun52#1,419Jul48#1,614Aug39#2,174Sep44#1,295Oct53#554Nov59#662Dec61#767
2024too few days for a mean (a year needs 257)234 days measured
Jan3 daysFeb20 daysMar14 daysApr58#605May53#720Jun47#1,125Jul38#1,765Aug15 daysSepnoneOct14 daysNov54#714Dec55#720
2023too few days for a mean (a year needs 256)56 days measured
Jan7 daysFeb62#334Mar20 daysApr3 daysMaynoneJunnoneJul1 dayAugnoneSepnoneOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Liepāja'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 Liepāja 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

22 months
MonthWhy
Sep 202611 of 30 days measured; a month needs 21. The others: 19 with readings for part of the day (a day needs 18 hours).
Aug 202610 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Jul 202613 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks.
Jun 202612 of 30 days measured; a month needs 21. The others: 18 with under 18 hours of readings or readings that failed our checks.
May 202620 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Oct 202414 of 31 days measured; a month needs 22. The others: 17 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 202415 of 31 days measured; a month needs 22. The others: 16 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.
Feb 202420 of 29 days measured; a month needs 21. The others: 9 with under 18 hours of readings or readings that failed our checks.
Jan 20243 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Dec 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 20231 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Jun 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 20233 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Mar 202320 of 31 days measured; a month needs 22. The others: 11 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.

Liepāja's worst months

MonthUS AQIDays measuredWorld rankEpisode
February 2026 8024.6 µg/m³27 of 28393rdof 2,866Poland and Latvia, February 2026
Europe, January and February 2026
February 2025 7823.5 µg/m³24 of 28329thof 2,633Europe, 14 February to 1 March 2025
March 2025 7823.4 µg/m³26 of 31457thof 2,862Europe, March 2025
Germany, Poland and 25 more countries, March 2025and 1 more
March 2026 7823.4 µg/m³25 of 31482ndof 2,971Europe, 18 to 25 March 2026
Europe, 1 to 12 March 2026
January 2026 7019.4 µg/m³26 of 31471stof 2,617Europe, January and February 2026
February 2023 6215.1 µg/m³25 of 28334thof 1,129Europe, 6 to 25 February 2023

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.

Liepāja's worst days

DayUS AQIEpisode
8 Mar 2025 15764.5 µg/m³Germany, Poland and 25 more countries, March 2025
24 Feb 2025 15560.9 µg/m³Europe, 14 February to 1 March 2025
21 Jan 2026 15156.0 µg/m³Europe, January and February 2026
20 Jan 2026 14252.3 µg/m³Europe, January and February 2026
9 Mar 2025 13951.1 µg/m³Germany, Poland and 25 more countries, March 2025
7 Mar 2025 13850.7 µg/m³Germany, Poland and 25 more countries, March 2025
11 Mar 2026 12946.7 µg/m³Europe, 1 to 12 March 2026
20 Mar 2023 12243.9 µg/m³Europe, 17 to 22 March 2023
28 Feb 2026 12143.5 µg/m³Poland and Latvia, February 2026
8 Mar 2026 11943.0 µg/m³Europe, 1 to 12 March 2026

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, Liepāja, Latvia, 11 Jan 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/lv/liepaja/history (accessed 12 Oct 2026).

Download chart (PNG)

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.

Liepāja 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).