Climate and hazards: regional anti-smog restrictions, seismic zone 3, limited hydrogeological risk
Biella applies the regional traffic restrictions ("Plain" zone), with the anti-smog traffic light active from 15 September to 15 April. It is in seismic zone 3. According to ISPRA, 240 residents live in areas of medium flood hazard and 107 in areas of high or very high landslide hazard.
Sections: Seasons · Rainfall · Temperatures · Air quality · Environmental hazards
Anti-smog restrictions
Biella is one of the Piedmont municipalities subject to the traffic restrictions of regional resolution DGR 26-3694 of 6 August 2021, in the "Plain" zone. Each municipality concerned applies them through a mayoral ordinance drafted on the regional template, which may also make the rules stricter. From 15 September to 15 April ARPA Piemonte monitors the conditions in which pollutants build up and triggers the orange and red levels of the anti-smog traffic light, which add temporary measures to the structural restrictions; the level in force is shown on the Aria+ Piemonte portal, the local rules in the municipal ordinance.
Seismic and hydrogeological risk
In the seismic classification list updated in May 2025 by the Civil Protection Department, Biella is in zone 3, where strong earthquakes are less likely than in zones 1 and 2. According to the indicators of ISPRA's IdroGEO platform (2024 report on hydrogeological instability), 240 residents live in areas of medium flood hazard and 107 in areas of high or very high landslide hazard: in both cases less than 1% of the population. The municipality's map can be viewed on the same platform.
Missing: temp_jan_avg, temp_jul_avg, rain_days_year
Data
Sources
Updated: 2026-10-22
Updated: 2026-10-22
Updated: 2026-10-22
Updated: 2026-10-22
Updated: 2026-10-22
Reviewed: 10/23/2026 · by piero.avolio · rev. 1 · Period: → 2027-10-31
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