What is the air quality trend in Biella?

Over the past 21 days, Biella had an average AQI of 38 based on station measurements. The worst day was 2026-05-28 with AQI 52.

How is Biella air quality measured?

Air quality in Biella is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Biella, Italy

Name: Biella Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Biella, Italy.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

401h

PM2.5 Station

401h · 2 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-06-09	44	10–123	13.5 µg/m³	5h	2
2026-06-08	48	10–304	20.9 µg/m³	21h	1
2026-06-07	34	12–84	8.8 µg/m³	21h	2
2026-06-06	24	5–74	6.1 µg/m³	21h	2
2026-06-05	49	14–493	29.4 µg/m³	21h	2
2026-06-04	25	12–38	6.0 µg/m³	18h	2
2026-06-03	27	8–50	6.4 µg/m³	21h	2
2026-06-02	26	2–52	6.2 µg/m³	22h	1
2026-06-01	32	4–85	8.0 µg/m³	19h	2
2026-05-31	38	8–93	10.0 µg/m³	21h	2
2026-05-30	41	9–102	11.1 µg/m³	23h	2
2026-05-29	43	16–88	10.9 µg/m³	21h	2
2026-05-28	52	4–149	14.6 µg/m³	19h	2
2026-05-27	38	2–79	9.9 µg/m³	23h	2
2026-05-26	51	13–155	14.2 µg/m³	16h	2
2026-05-25	42	10–117	11.4 µg/m³	22h	2
2026-05-24	42	1–137	11.2 µg/m³	21h	2
2026-05-23	37	19–54	8.9 µg/m³	17h	2
2026-05-22	38	12–76	9.4 µg/m³	18h	2
2026-05-21	36	16–63	8.8 µg/m³	19h	2
2026-05-20	35	1–55	8.4 µg/m³	12h	2

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