Poland · The summary is refreshed every 15 minutes.
October 26
The air is clean now
Bielsko-Biała
9°C
Cloudy
31AQI
1018hPa
Atmospheric
pressure
77%
Humidity
Bielsko-Biała, October 25, 2026: daily mean PM2.5 4 µg/m³ (16 sensors), level “Low” — as in the Atmy Data Hub. Now (11:00 local time): 5.6 µg/m³. Open methodology and data in JSON: Methodology and data sources · JSON
Right now in Bielsko-Biała, PM2.5 averages 5.6 µg/m³ — “good” on the US EPA scale (approximate, from hourly readings). Mean of 16 sensors from Sensor.Community, readings from 10:55–10:58 local time (09:55–09:58 UTC), summary prepared at 11:00 local time. Median: 2.6 µg/m³; range across sensors: 0.5–36.5 µg/m³.
In Bielsko-Biała the air is good right now (approximate, US EPA scale). From 22:00 to 11:00 local time the city mean PM2.5 rose from 1.6 to 5.6 µg/m³.
The weather data do not point to a clear reason for this level.
Weather now: cloudy, 9°C, wind 4 m/s, humidity 77%. By 15:00 the wind is expected to drop to 2 m/s, and particles may build up.
Written automatically at 11:00 local time (10:00 UTC) from sensor measurements and the weather forecast. Values are approximate; hypotheses are marked.
4 m/s
Wind, W
0.2 mm
Precipitation today
4 µg/m³ Low
Daily mean PM2.5 on October 25, 2026 (00:00–24:00 UTC = 02:00–02:00 UTC+2): 4 µg/m³ from 16 sensors that passed the quality check — the same value as in the Atmy Data Hub.
Monthly means of quality-checked sensors, as in the Data Hub trend; the current month is still incomplete, “-” means no data.
22/100Low · An estimate of weather conditions · not a PM2.5 forecast
10°/6°
Index by time of day
28/100Low
Night
Morning
Day
Evening12°/5°
Index by time of day
53/100Moderate
NightMorningDayEvening14°/4°
Index by time of day
51/100Moderate
NightMorningDayEvening8°/5°
Index by time of day
50/100Moderate
NightMorningDayEvening8°/5°
Index by time of day
56/100Moderate
NightMorningDayEvening6°/5°
Index by time of day
36/100Moderate
NightMorningDayEveningForecast of conditions that trap pollution near the surface
9°
Cloudy. Feels like 5°C
8°C82%
10°C69%
8°C76%4m/sWind from the W
8m/sWind gusts
Wind force: 3
Gusts up to 8 m/s are expected.
Poland
10°C6°C12°C5°C14°C4°C8°C5°C8°C5°C6°C5°C6°C3°C7°C3°C6°C3°C5°C3°C
Highest current reading: 36.5 µg/m³ (SC #93790). Lowest: 0.5 µg/m³ (SC #90532). The list shows every sensor, highest first.
Source: atmy.ai monitoring network
Sensors in the summary by network: Sensor.Community — 16 sensors.
Atmy shows the networks’ readings after the Data Hub’s quality check: test devices and sensors that fail it are left out.
549
WarsawPoland
98WrocławPoland
68PoznanPoland
48Cities with the most sensors
All sensors on the map, by city as the map assigns them; the city’s values count only the sensors that pass the Data Hub’s quality check.
Daily mean PM2.5 of the city sensors, µg/m³
Click a day to see its date and value.
A card with the current PM2.5 in Bielsko-Biała: it is refreshed every 15 minutes and links to this page. Paste the code into your site.
Poland · City ranking · All pilot cities
Daily mean PM2.5 on October 25, 2026 (00:00–24:00 UTC = 02:00–02:00 UTC+2): 4 µg/m³ from 16 sensors that passed the quality check — the same value as in the Atmy Data Hub. No. 23 of 31 cities in Poland and No. 144 of 284 worldwide, from the most polluted.
Right now in Bielsko-Biała, PM2.5 averages 5.6 µg/m³ — “good” on the US EPA scale (approximate, from hourly readings). Mean of 16 sensors from Sensor.Community, readings from 10:55–10:58 local time (09:55–09:58 UTC), summary prepared at 11:00 local time. Median: 2.6 µg/m³; range across sensors: 0.5–36.5 µg/m³.
The current level is “good” (US EPA scale, approximate). Air quality is satisfactory; no restrictions are recommended. This is the standard guidance of the scale, not medical advice.
Highest current reading: 36.5 µg/m³ (SC #93790). Lowest: 0.5 µg/m³ (SC #90532). The list shows every sensor, highest first.
From Atmy sensors and connected public networks (citizen, experimental and government monitors), aggregated by Atmy. Values are approximate; see the methodology.
The summary is rebuilt every 15 minutes from the latest reading of each sensor, each no older than one hour.
Over the last 365 days with data, the mean daily PM2.5 in Bielsko-Biała was 11.0 µg/m³ — 2.2 times the WHO annual guideline (5 µg/m³). Over the last 30 days: 8.2 µg/m³. From Atmy's archive of daily city means.
In Atmy's daily archive, the cleanest month of the last year was September 2026: 4.2 µg/m³ on average.
The most polluted month of the last year was January 2026: 24.8 µg/m³ on average.
From November to March the mean daily PM2.5 was 18.6 µg/m³, from June to August 4.5 µg/m³ (last 365 days).
The daily value is the Data Hub’s: the mean of the city’s sensors that passed the nightly quality check, each with at least 12 valid hours, and only with sensors at four places 500 m apart; days are UTC.
“Now” uses the same sensors and rule: the mean of their latest readings, each at most 60 minutes old, shown only with sensors at four places 500 m apart reporting.
Source: public Atmy monitoring data. Methodology and data sources · Data terms
