SmogRank / Italy / Piedmont

Air quality in Bra

Piedmont, Italy. PM2.5 from 1 reference monitor, updated hourly.

31.0 µg/m³
Moderate

Latest hour (03:00 UTC), 2.1× the WHO 24-hour guideline.

Rank

24 h
–
not enough data
7 days
#216
of 2,330 · 16.1 µg/m³
30 days
–
not enough data
Year
–
not enough data

Why it ranks here

Likely fire smoke. On Sep 26, when Bra averaged 18.1 µg/m³ (its typical day: 13.1), NASA satellites detected 53 fires within 300 km (5 within 100 km). Smoke from those fires is a likely contributor; we don't check which way the wind blew, and mapped smoke can be high above the ground.

Based on Bra's own measurements, with fire detections from NASA FIRMS and smoke maps from NOAA HMS; causes are the usual kinds for a pattern like this, not a confirmed source.

Last 4 days, hour by hour

15312026-09-30 21:00 UTC: 12.0 µg/m³2026-09-30 23:00 UTC: 6.0 µg/m³2026-10-01 00:00 UTC: 27.0 µg/m³2026-10-01 02:00 UTC: 25.0 µg/m³2026-10-01 03:00 UTC: 31.0 µg/m³Sep 28Sep 29Sep 30Oct 1

Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Every day for a year

SepNovDecJanFebMarAprMayJunJulAugSepMonWedFri2025-09-29: 6.1 µg/m³2025-09-30: 16.1 µg/m³2025-10-01: no data2025-10-02: no data2025-10-03: no data2025-10-04: no data2025-10-05: no data2025-10-06: no data2025-10-07: no data2025-10-08: no data2025-10-09: no data2025-10-10: no data2025-10-11: no data2025-10-12: no data2025-10-13: no data2025-10-14: 42.8 µg/m³2025-10-15: no data2025-10-16: no data2025-10-17: no data2025-10-18: no data2025-10-19: no data2025-10-20: no data2025-10-21: 25.0 µg/m³2025-10-22: 20.7 µg/m³2025-10-23: 17.9 µg/m³2025-10-24: 4.9 µg/m³2025-10-25: no data2025-10-26: no data2025-10-27: no data2025-10-28: no data2025-10-29: no data2025-10-30: no data2025-10-31: no data2025-11-01: no data2025-11-02: no data2025-11-03: no data2025-11-04: no data2025-11-05: no data2025-11-06: no data2025-11-07: no data2025-11-08: no data2025-11-09: no data2025-11-10: no data2025-11-11: no data2025-11-12: no data2025-11-13: no data2025-11-14: no data2025-11-15: no data2025-11-16: no data2025-11-17: no data2025-11-18: no data2025-11-19: no data2025-11-20: no data2025-11-21: no data2025-11-22: no data2025-11-23: no data2025-11-24: no data2025-11-25: no data2025-11-26: no data2025-11-27: no data2025-11-28: no data2025-11-29: no data2025-11-30: no data2025-12-01: no data2025-12-02: no data2025-12-03: no data2025-12-04: no data2025-12-05: no data2025-12-06: no data2025-12-07: no data2025-12-08: no data2025-12-09: no data2025-12-10: no data2025-12-11: no data2025-12-12: no data2025-12-13: no data2025-12-14: no data2025-12-15: no data2025-12-16: no data2025-12-17: no data2025-12-18: no data2025-12-19: no data2025-12-20: no data2025-12-21: no data2025-12-22: no data2025-12-23: no data2025-12-24: no data2025-12-25: no data2025-12-26: no data2025-12-27: no data2025-12-28: no data2025-12-29: no data2025-12-30: no data2025-12-31: no data2026-01-01: no data2026-01-02: no data2026-01-03: no data2026-01-04: no data2026-01-05: no data2026-01-06: no data2026-01-07: no data2026-01-08: no data2026-01-09: no data2026-01-10: no data2026-01-11: no data2026-01-12: no data2026-01-13: no data2026-01-14: no data2026-01-15: no data2026-01-16: no data2026-01-17: no data2026-01-18: no data2026-01-19: no data2026-01-20: no data2026-01-21: 31.4 µg/m³2026-01-22: 36.9 µg/m³2026-01-23: 29.6 µg/m³2026-01-24: no data2026-01-25: no data2026-01-26: no data2026-01-27: no data2026-01-28: no data2026-01-29: no data2026-01-30: no data2026-01-31: no data2026-02-01: no data2026-02-02: no data2026-02-03: no data2026-02-04: no data2026-02-05: no data2026-02-06: no data2026-02-07: no data2026-02-08: no data2026-02-09: no data2026-02-10: no data2026-02-11: no data2026-02-12: no data2026-02-13: no data2026-02-14: no data2026-02-15: no data2026-02-16: no data2026-02-17: no data2026-02-18: no data2026-02-19: no data2026-02-20: no data2026-02-21: no data2026-02-22: no data2026-02-23: no data2026-02-24: no data2026-02-25: no data2026-02-26: no data2026-02-27: no data2026-02-28: no data2026-03-01: no data2026-03-02: no data2026-03-03: no data2026-03-04: no data2026-03-05: no data2026-03-06: no data2026-03-07: no data2026-03-08: no data2026-03-09: no data2026-03-10: no data2026-03-11: no data2026-03-12: no data2026-03-13: no data2026-03-14: no data2026-03-15: no data2026-03-16: no data2026-03-17: no data2026-03-18: no data2026-03-19: no data2026-03-20: no data2026-03-21: no data2026-03-22: no data2026-03-23: no data2026-03-24: no data2026-03-25: no data2026-03-26: no data2026-03-27: no data2026-03-28: no data2026-03-29: no data2026-03-30: 8.1 µg/m³2026-03-31: 7.3 µg/m³2026-04-01: 7.5 µg/m³2026-04-02: 9.1 µg/m³2026-04-03: 9.7 µg/m³2026-04-04: 7.8 µg/m³2026-04-05: 14.3 µg/m³2026-04-06: 8.2 µg/m³2026-04-07: 8.6 µg/m³2026-04-08: 10.8 µg/m³2026-04-09: 15.6 µg/m³2026-04-10: 26.4 µg/m³2026-04-11: 19.2 µg/m³2026-04-12: 25.1 µg/m³2026-04-13: 11.9 µg/m³2026-04-14: 7.1 µg/m³2026-04-15: 10.6 µg/m³2026-04-16: 11.9 µg/m³2026-04-17: 17.9 µg/m³2026-04-18: 20.5 µg/m³2026-04-19: 18.8 µg/m³2026-04-20: 12.1 µg/m³2026-04-21: no data2026-04-22: no data2026-04-23: no data2026-04-24: no data2026-04-25: 10.5 µg/m³2026-04-26: 10.1 µg/m³2026-04-27: 13.0 µg/m³2026-04-28: no data2026-04-29: 14.8 µg/m³2026-04-30: 10.8 µg/m³2026-05-01: 11.2 µg/m³2026-05-02: 11.5 µg/m³2026-05-03: 10.7 µg/m³2026-05-04: no data2026-05-05: no data2026-05-06: 7.2 µg/m³2026-05-07: 5.4 µg/m³2026-05-08: no data2026-05-09: no data2026-05-10: no data2026-05-11: no data2026-05-12: no data2026-05-13: no data2026-05-14: 9.5 µg/m³2026-05-15: no data2026-05-16: no data2026-05-17: 4.8 µg/m³2026-05-18: no data2026-05-19: 7.8 µg/m³2026-05-20: 8.0 µg/m³2026-05-21: 9.8 µg/m³2026-05-22: no data2026-05-23: 14.6 µg/m³2026-05-24: 17.8 µg/m³2026-05-25: no data2026-05-26: no data2026-05-27: 14.7 µg/m³2026-05-28: 17.5 µg/m³2026-05-29: 14.0 µg/m³2026-05-30: 15.7 µg/m³2026-05-31: 13.2 µg/m³2026-06-01: 11.7 µg/m³2026-06-02: 10.5 µg/m³2026-06-03: 5.4 µg/m³2026-06-04: 10.4 µg/m³2026-06-05: no data2026-06-06: 7.7 µg/m³2026-06-07: 9.0 µg/m³2026-06-08: no data2026-06-09: no data2026-06-10: no data2026-06-11: 6.3 µg/m³2026-06-12: no data2026-06-13: no data2026-06-14: 9.5 µg/m³2026-06-15: 10.9 µg/m³2026-06-16: no data2026-06-17: no data2026-06-18: 15.0 µg/m³2026-06-19: 15.0 µg/m³2026-06-20: 15.0 µg/m³2026-06-21: 20.1 µg/m³2026-06-22: 18.7 µg/m³2026-06-23: 18.3 µg/m³2026-06-24: 17.2 µg/m³2026-06-25: 14.7 µg/m³2026-06-26: 17.2 µg/m³2026-06-27: no data2026-06-28: no data2026-06-29: no data2026-06-30: 11.6 µg/m³2026-07-01: 9.7 µg/m³2026-07-02: no data2026-07-03: 9.0 µg/m³2026-07-04: 12.9 µg/m³2026-07-05: 14.9 µg/m³2026-07-06: 10.6 µg/m³2026-07-07: 14.7 µg/m³2026-07-08: 11.6 µg/m³2026-07-09: 13.1 µg/m³2026-07-10: 14.1 µg/m³2026-07-11: 10.7 µg/m³2026-07-12: 9.3 µg/m³2026-07-13: 14.8 µg/m³2026-07-14: 15.7 µg/m³2026-07-15: 15.9 µg/m³2026-07-16: 14.3 µg/m³2026-07-17: 14.1 µg/m³2026-07-18: 16.3 µg/m³2026-07-19: 15.7 µg/m³2026-07-20: no data2026-07-21: no data2026-07-22: 13.3 µg/m³2026-07-23: 14.6 µg/m³2026-07-24: 14.6 µg/m³2026-07-25: 13.1 µg/m³2026-07-26: 12.0 µg/m³2026-07-27: 20.2 µg/m³2026-07-28: 15.9 µg/m³2026-07-29: 18.1 µg/m³2026-07-30: no data2026-07-31: 19.1 µg/m³2026-08-01: no data2026-08-02: 21.3 µg/m³2026-08-03: 17.1 µg/m³2026-08-04: 13.5 µg/m³2026-08-05: 16.4 µg/m³2026-08-06: 14.2 µg/m³2026-08-07: 15.6 µg/m³2026-08-08: 15.7 µg/m³2026-08-09: 15.1 µg/m³2026-08-10: 11.4 µg/m³2026-08-11: 16.0 µg/m³2026-08-12: 17.7 µg/m³2026-08-13: 17.4 µg/m³2026-08-14: 16.5 µg/m³2026-08-15: no data2026-08-16: no data2026-08-17: no data2026-08-18: no data2026-08-19: 10.9 µg/m³2026-08-20: 13.5 µg/m³2026-08-21: no data2026-08-22: 6.9 µg/m³2026-08-23: 11.1 µg/m³2026-08-24: 11.1 µg/m³2026-08-25: 18.1 µg/m³2026-08-26: 12.3 µg/m³2026-08-27: no data2026-08-28: 16.0 µg/m³2026-08-29: 9.5 µg/m³2026-08-30: 9.8 µg/m³2026-08-31: no data2026-09-01: 8.2 µg/m³2026-09-02: 10.2 µg/m³2026-09-03: 13.7 µg/m³2026-09-04: no data2026-09-05: 12.2 µg/m³2026-09-06: 12.3 µg/m³2026-09-07: no data2026-09-08: no data2026-09-09: no data2026-09-10: no data2026-09-11: no data2026-09-12: no data2026-09-13: 10.1 µg/m³2026-09-14: no data2026-09-15: no data2026-09-16: 16.8 µg/m³2026-09-17: 15.9 µg/m³2026-09-18: 9.2 µg/m³2026-09-19: 9.9 µg/m³2026-09-20: 8.9 µg/m³2026-09-21: 9.7 µg/m³2026-09-22: no data2026-09-23: 8.6 µg/m³2026-09-24: 11.5 µg/m³2026-09-25: 17.5 µg/m³2026-09-26: 18.1 µg/m³2026-09-27: 14.3 µg/m³2026-09-28: no data2026-09-29: 18.7 µg/m³2026-09-30: 16.4 µg/m³
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

48 of 140 measured days were over the WHO 24-hour guideline.

Daily world rank

#1#1550NovDecJanFebMarAprMayJunJulAugSep

Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15JanFebMarApr 2025: 9.4 µg/m³Apr 2026: 13.3 µg/m³AprMay 2025: 8.1 µg/m³May 2026: 11.4 µg/m³MayJun 2025: 18.4 µg/m³Jun 2026: 12.9 µg/m³JunJul 2025: 9.9 µg/m³Jul 2026: 14.0 µg/m³JulAug 2025: 13.9 µg/m³Aug 2026: 14.2 µg/m³AugSep 2025: 10.9 µg/m³Sep 2026: 12.7 µg/m³SepOctNovDec

Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 16.1 µg/m³16.120252025: 8.0 µg/m³8.0

Mean PM2.5 for 24 Sept to 30 Sept in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
Bra - Madonna FioriODC-BYEEAReference

The city's value is the median of its reference monitors each hour; low-cost sensors are listed but not counted when reference monitors exist. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Other cities in Italy

Milan 13.8Nichelino 12.9Alessandria 12.1Turin 11.7Benevento 10.6Rovereto 10.2Trento 10.0Aosta 10.0Caserta 9.6Naples 9.1Salerno 8.7Bolzano 7.5

30-day averages, µg/m³. All of Italy →

Updated 2026-10-01 05:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.