Photo: un bouchervillois · Public domainFlood mapping exists for Boucherville: 1 on record, latest by Gouvernement du Québec
Little of the land around Boucherville has burned: 0.1% within 25 km since 1986, or 0.001% a year. Shaking is a bigger worry than in most places, at $0.20 a year per $1,000 of building value ($0.030 typical). Boucherville’s survey area, 8.2% over the radon guideline, is close to the typical town’s 6.6%. Boucherville grades C− for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Boucherville’s hazards
Four national sources, each read for Boucherville: earthquakes, radon, past fires and flood studies.
What Boucherville faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Boucherville: C−
Earthquake risk and radon make Boucherville’s grade; wildfire can only lower it, never raise it, and flood studies are listed but not scored.
Its place: #372 of 507 in Quebec and #2,347 of 2,589 Canadian towns.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. Small fires and grass fires are largely missing from the national burned-area record.
Little of the land around Boucherville has burned: 0% within 5 km, 0.1% within 25 km since 1986
Fires mapped since 1986 around where Boucherville’s residents live, and the fuel next to their homes.
The yearly burn rate around Boucherville is 0.001%, low beside 0.000% for the typical Canadian town.
The 5 km ring around Boucherville’s homes is clear of burns since 1986, the nearest 7.6 km out.
Around Boucherville the forest is thin or far off: 0.6% of the land within 5 km and 1.5% within 25 km is forest fuel.
Shares of land within 5 and 25 km of populated blocks: burned at least once in 1986–2025 (CWFIS burned-area composite), forest fuel and grass (fire behaviour fuel types, 2026, 250 m grid).
Burn rate a year, towns in Quebec · highest of 513
At 0.001% a year, Boucherville ranks 136th of the 513 towns in Quebec; Mistissini leads at 0.31%.
Each bar: the yearly average share of land within 25 km of a town’s homes that burned, 1986–2025 (CWFIS); the seven highest towns of 2,500 people or more.
7.5% of Canada’s 2,610 towns burn fast enough to rank moderate or above; Boucherville stays low, with 92%.
Bands of the yearly burn rate: low under 0.05%, moderate under 0.25%, high under 1%, very high 1% or more; towns of 2,500 people or more.
Fire danger and active fires (CWFIS)
Canadian Wildland Fire Information System: National Burned Area Composite 1986–2025 and fire behaviour fuel types (2026), Natural Resources Canada. Measured within 25 km and 5 km of each populated dissemination area; past fire, not a forecast.
Gouvernement du Québec has mapped flooding for Boucherville (1 study)
Flood studies whose area touches Boucherville, from NRCan’s inventory, each linked to its owner.
One study on the inventory touches Boucherville, Gouvernement du Québec’s from 1996, and its area can be large, so it says a map exists, not that the town floods.
| Study | By | Year | Status |
|---|---|---|---|
| Varennes-Grondines | Gouvernement du Québec | 1996 | final |
Towns with a flood study on file
Flood maps are thinner in Quebec, 45% of towns against 58% nationally, but Boucherville has one.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
The grade leaves flood out, since a study area says nothing about how many of Boucherville’s homes are at risk.
The inventory’s own caution (NRCan): “The Canada Flood Map (CFM) does not include every flood hazard map in Canada and may be incomplete or contain inaccuracies. It should not be relied upon as the official source of flood mapping information. Furthermore, if a map appears to be missing, this does not necessarily mean that the area has never been mapped. For the official version of a map, updated information, or confirmation of applicable regulations, please contact the local authority responsible for flood mapping.”
Natural Resources Canada, Canada Flood Map Inventory; links go to each study’s owner.
High seismic risk in Boucherville: $0.20 per $1,000 of buildings a year
NRCan’s seismic risk model: the damage shaking is expected to do to buildings each year, on average over many years.
Boucherville’s $0.20 is about 6.7 times the typical town’s $0.030: it sits in one of Canada’s more active seismic zones.
Shaking damage a year per $1,000 of building value
Earthquake risk in Quebec peaks in La Pocatière ($0.48); Boucherville, at $0.20, sits above the median of $0.14.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
In the upper part of Canada’s range: 11% of its 2,611 towns expect more damage than Boucherville.
Each column: the share of Canada’s towns of 2,500 people or more in that range of yearly loss per $1,000 (NRCan, 2022).
Roads, pipes and bridges aren’t in Boucherville’s figure, nor landslides or tsunami: it is buildings and shaking.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
8.2% of homes tested around Boucherville are over the radon guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline. · Shared with the rest of the Monteregie health region: radon tests
Boucherville’s area, at 8.2%, is close to the 6.6% of the typical Canadian town.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Boucherville’s area, at 8.2%, is close to the median in Quebec (8.2%).
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
37% of Canada’s 2,611 towns share Boucherville’s band of 5 to 10%; 26% sit higher.
Each bar: the share of Canada’s towns of 2,500 people or more whose survey area had that share of tests over 200 Bq/m³.
Basements, soil and how a house is sealed decide its radon, so in Boucherville only a test can say.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Boucherville
Environment and Climate Change Canada issues the weather alerts for Boucherville; Alert Ready carries the urgent ones to phones, radio and TV.
| Alert | What it means |
|---|---|
| Warning | Severe weather is happening or about to: act now. |
| Watch | Conditions favour severe weather: be ready. |
| Advisory | Weather that is less severe but could disrupt the day. |
| Special weather statement | Unusual weather worth knowing about. |
| Special air quality statement | Poor air, often wildfire smoke. |
For fires near Boucherville, the national fire information system maps danger and active fires daily; local authorities give any evacuation order.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
How Boucherville’s neighbours compare on hazards
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Boucherville | Low | $0.20 | 8.2% | Yes |
| Fatima 6,213 · 5.1 km | Low | $0.23 | 8.2% | None listed |
| Collectivité Nouvelle 3,587 · 5.7 km | Low | $0.23 | 8.2% | None listed |
| Beaurivage 13,574 · 5.8 km | Low | $0.20 | 6.8% | None listed |
| Montréal-Est 5,112 · 6.1 km | Low | $0.16 | 6.8% | None listed |
| Parcours-du-Cerf - Du Tremblay 21,776 · 6.3 km | Low | $0.23 | 8.2% | None listed |
| Tétreaultville 19,390 · 6.5 km | Low | $0.20 | 6.8% | None listed |
Fatima burns a little more than Boucherville, in the same low band (low here).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Boucherville faces
Practical steps for Boucherville’s hazards, most pressing first.
- Test for three months in winter.
- Over 200 Bq/m³: fix it.
- Kits are cheap; pros test too.
- Never drive through floodwater.
- Move papers and medicines upstairs.
- Ask whether your street is mapped.
- Drop, cover and hold on.
- Strap the water heater down.
- Keep 72 hours of supplies.
- Has it had a radon test?
- Check the address on the flood map.
- Are flood and wildfire insured?
- Is earthquake cover included?
What this data can and can’t tell you
- Earthquakes are modelled. Shaking damage is modelled from the ground, the buildings and the odds of each quake, and published for whole subdivisions such as Boucherville’s.
- Radon is a survey. The radon share comes from about 14,000 long-term home tests in 2009–2011, pooled for now by the 2007 health region Boucherville sits in.
- Wildfire counts one way. The wildfire figure is the share of land within 25 km of Boucherville’s homes burned each year from 1986 to 2025, past fire rather than a forecast, and it can only lower Risk.
- Flood studies aren’t flood zones. A study’s area can be a whole watershed or province, so being on the inventory says a map exists, not that a home in Boucherville floods.
Questions about flooding and hazards in Boucherville
Does Boucherville flood?
Boucherville’s area has been studied for flooding, and the owner’s map shows which streets lie in a zone; the grade leaves flood out.
How is Boucherville’s Hazard risk Grade worked out?
Boucherville grades C− for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
Is Boucherville at risk of wildfire?
Not much by Canadian standards: Boucherville’s band is low, with 0.1% of the land within 25 km burned since 1986 (last in 2024), so wildfire doesn’t change its grade.
How big is the earthquake risk in Boucherville?
Expected earthquake damage in Boucherville comes to $0.20 a year for each $1,000 that buildings are worth.
Is radon a problem in Boucherville?
8.2% of the 110 homes Health Canada tested around Boucherville topped the guideline; your own house needs its own test.
Seismic risk: Natural Resources Canada. Radon: Health Canada. Wildfire: Canadian Wildland Fire Information System. Flood studies: Natural Resources Canada, Canada Flood Map Inventory. Contains information licensed under the Open Government Licence – Canada.
Sources: NRCan, Canada’s Seismic Risk Model 2022 · Health Canada, Cross-Canada Survey of Radon Concentrations in Homes · CWFIS, National Burned Area Composite and FBP fuel types · NRCan, Canada Flood Map Inventory. Under the Statistics Canada Open Licence.
Adapted from Statistics Canada (Census of Population 2021, population estimates 2025, 2021 census boundaries) under the Statistics Canada Open Licence; this does not constitute an endorsement by Statistics Canada. Neighbourhood names in some cities © OpenStreetMap contributors (ODbL).