Bristol air quality now

Great Britain · The summary is refreshed every 15 minutes.

October 22

The air is moderate now

Bristol

15°C

Cloudy

61AQI

1006hPa

Atmospheric
pressure

58%

Humidity

Bristol, October 21, 2026: daily mean PM2.5 9 µg/m³ (5 sensors), level “Low” — as in the Atmy Data Hub. Now (19:00 local time): 14.7 µg/m³. Open methodology and data in JSON: Methodology and data sources · JSON

Right now in Bristol, PM2.5 averages 14.7 µg/m³ — “moderate” on the US EPA scale (approximate, from hourly readings). Mean of 5 sensors on the Atmy network, readings from 18:47–18:57 local time (17:47–17:57 UTC), summary prepared at 19:00 local time. Median: 1.4 µg/m³; range across sensors: 1.0–67.0 µg/m³.

In Bristol the air is moderate right now (approximate, US EPA scale). From 06:00 to 19:00 local time the city mean PM2.5 rose from 9.2 to 14.7 µg/m³.

The weather data do not point to a clear reason for this level.

Weather now: cloudy, 15°C, wind 4 m/s, humidity 58%. By 00:00 the wind is expected to pick up to 7 m/s, which may clear the air. Precipitation is expected around 20:00; it may wash particles out. By 06:00 the temperature will be about 11°C.

Written automatically at 19:00 local time (18:00 UTC) from sensor measurements and the weather forecast. Values are approximate; hypotheses are marked.

14 km/h

Wind, SSE

1.2 mm

Precipitation today

Bristol: air quality for the completed day

Metric: PM2.5, µg/m³ · Color scale: EPA AQI · October 21, 2026 · 00:00–24:00 UTC

9 µg/m³ Low

Daily mean PM2.5 on October 21, 2026 (00:00–24:00 UTC): 9 µg/m³ from 5 sensors that passed the quality check — the same value as in the Atmy Data Hub.

No. 2 of 4 cities in Great Britain and No. 140 of 297 worldwide, from the most polluted.

LowModerateElevatedHighVery highExtremely high

Bristol: PM2.5 by month

Metric: PM2.5, µg/m³ · Color scale: EPA AQI

Mean
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
This month
15
13
11
15
11
11
23
9
11
7
7
36
28
27

Monthly means of quality-checked sensors, as in the Data Hub trend; the current month is still incomplete, “-” means no data.

Pollution accumulation index now

12%An estimate of weather conditions · not a PM2.5 forecast

Now1212
19.0003.0010.0018.00

Pollution accumulation forecast

Today — October 22

15°/9°

Index by time of day

39/100Moderate

  1. 39/100Night
  2. 31/100Morning
  3. 9/100Day
  4. 14/100Evening

Friday — October 23

13°/9°

Index by time of day

29/100Low

  1. 29/100Night
  2. 23/100Morning
  3. 7/100Day
  4. 18/100Evening

Saturday — October 24

17°/9°

Index by time of day

38/100Moderate

  1. 38/100Night
  2. 34/100Morning
  3. 6/100Day
  4. 14/100Evening

Sunday — October 25

12°/10°

Index by time of day

32/100Low

  1. 32/100Night
  2. 25/100Morning
  3. 5/100Day
  4. 21/100Evening

Monday — October 26

17°/9°

Index by time of day

47/100Moderate

  1. 47/100Night
  2. 30/100Morning
  3. 5/100Day
  4. 11/100Evening

Tuesday — October 27

16°/10°

Index by time of day

26/100Low

  1. 26/100Night
  2. 23/100Morning
  3. 7/100Day
  4. 20/100Evening

Forecast of conditions that trap pollution near the surface

Weather

15°

Cloudy. Feels like 12°C

  1. MorningPartly cloudy10°C78%
  2. DayPartly cloudy14°C62%
  3. EveningRain12°C95%

Wind

14km/hWind from the SSE

29km/hWind gusts

Wind force: 3

Gusts up to 49 km/h are expected.

10-day weather forecast for Bristol

Great Britain

  1. TodayOct 22Rain15°C9°C
  2. FriOct 23Rain13°C9°C
  3. SatOct 24Rain17°C9°C
  4. SunOct 25Cloudy12°C10°C
  5. MonOct 26Rain17°C9°C
  6. TueOct 27Rain16°C10°C
  7. WedOct 28Rain13°C9°C
  8. ThuOct 29Cloudy13°C7°C
  9. FriOct 30Partly cloudy15°C9°C
  10. SatOct 31Cloudy16°C11°C

Where in Bristol is the air worse?

See all sensors

Highest current reading: 67.0 µg/m³ (Northcote Street, Bristol). Lowest: 1.0 µg/m³ (SC #48987). The list shows every sensor, highest first.

  1. Northcote Street, Bristol →67 µg/m³
  2. SC #33862 →3 µg/m³
  3. SC #97614 →1 µg/m³
  4. SC #90501 →1 µg/m³
  5. SC #48987 →1 µg/m³

Source: atmy.ai monitoring network

Who provides the data

Sensors in the summary by network: Sensor.Community — 4 sensors, AirGradient — 1 sensor.

Atmy shows the networks’ readings after the Data Hub’s quality check: test devices and sensors that fail it are left out.

Great Britain: sensors in total

51

  1. City of LondonGreat Britain

    19

  2. AberdeenGreat Britain

    8

  3. DundeeGreat Britain

    6

Cities 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.

Air quality calendar: Bristol

Daily mean PM2.5 of the city sensors, µg/m³

Click a day to see its date and value.

LowModerateElevatedHighVery highExtremely high

Widget for your site

A card with the current PM2.5 in Bristol: it is refreshed every 15 minutes and links to this page. Paste the code into your site.

Air quality in Bristol now — Atmy

Great Britain · City ranking · All pilot cities

Questions

What was the air quality in Bristol over the last completed day?

Daily mean PM2.5 on October 21, 2026 (00:00–24:00 UTC): 9 µg/m³ from 5 sensors that passed the quality check — the same value as in the Atmy Data Hub. No. 2 of 4 cities in Great Britain and No. 140 of 297 worldwide, from the most polluted.

What is the air quality in Bristol right now?

Right now in Bristol, PM2.5 averages 14.7 µg/m³ — “moderate” on the US EPA scale (approximate, from hourly readings). Mean of 5 sensors on the Atmy network, readings from 18:47–18:57 local time (17:47–17:57 UTC), summary prepared at 19:00 local time. Median: 1.4 µg/m³; range across sensors: 1.0–67.0 µg/m³.

Is it safe to be outdoors in Bristol now?

The current level is “moderate” (US EPA scale, approximate). Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors. This is the standard guidance of the scale, not medical advice.

Where in Bristol is the air worse?

Highest current reading: 67.0 µg/m³ (Northcote Street, Bristol). Lowest: 1.0 µg/m³ (SC #48987). The list shows every sensor, highest first.

Where do these data come from?

From Atmy sensors and connected public networks (citizen, experimental and government monitors), aggregated by Atmy. Values are approximate; see the methodology.

How often is this page updated?

The summary is rebuilt every 15 minutes from the latest reading of each sensor, each no older than one hour.

Is the air in Bristol polluted?

Over the last 362 days with data, the mean daily PM2.5 in Bristol was 14.2 µg/m³ — 2.8 times the WHO annual guideline (5 µg/m³). Over the last 30 days: 26.6 µg/m³. From Atmy's archive of daily city means.

When is the air in Bristol cleanest?

In Atmy's daily archive, the cleanest month of the last year was July 2026: 7.4 µg/m³ on average.

When is the air in Bristol most polluted?

The most polluted month of the last year was March 2026: 24.1 µg/m³ on average.

Is the air in Bristol worse in the heating season?

From November to March the mean daily PM2.5 was 15.9 µg/m³, from June to August 10.4 µg/m³ (last 365 days).

Data

Where do these data come from?

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