Dutrisac’s hazards at a glance: a low wildfire record and 6.8% of area homes over the radon guideline
Burn scars are few around Dutrisac, with 0.1% of the land within 25 km touched by fire since 1986 (0.001% a year). Seismic risk runs high: $0.20 of expected damage per $1,000 of buildings a year, the typical town $0.030. Dutrisac grades C for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Dutrisac’s hazards
Four national sources, each read for Dutrisac: earthquakes, radon, past fires and flood studies.
What Dutrisac faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Dutrisac grades C for hazard risk
Earthquake risk and radon make Dutrisac’s grade; wildfire can only lower it, never raise it, and flood studies are listed but not scored.
Its place: #161 of 507 in Quebec and #2,110 of 2,589 Canadian towns.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. Only 74 homes were tested in the survey area, so the radon share is rough. Small fires and grass fires are largely missing from the national burned-area record.
Little of the land around Dutrisac has burned: 0% within 5 km, 0.1% within 25 km since 1986
Fires mapped since 1986 around where Dutrisac’s residents live, and the fuel next to their homes.
Around Dutrisac fire takes 0.001% of the land in a typical year, the typical Canadian town 0.000%, which is low.
Since 1986 the nearest fire to Dutrisac’s homes came within 14 km, never inside 5 km.
Only 1.3% of the land within 25 km of Dutrisac is forest fuel, and 0.1% close in.
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
Dutrisac sits mid-table in Quebec: 136th of 513 towns, at 0.001% a year, well behind Mistissini (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.
Some fire is mapped around Dutrisac, but not enough to leave the low band, where 92% of Canada’s 2,610 towns are; 7.5% rank higher.
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.
The flood map inventory lists nothing for Dutrisac
Flood studies whose area touches Dutrisac, from NRCan’s inventory, each linked to its owner.
Canada’s Flood Map Inventory lists no study whose area touches Dutrisac, which doesn’t mean it has never been mapped.
Towns with a flood study on file
Flood maps are thinner in Quebec, 45% of towns against 58% nationally, and Dutrisac has none.
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 Dutrisac’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.”
Earthquakes cost buildings in Dutrisac $0.20 per $1,000 a year
NRCan’s seismic risk model: the damage shaking is expected to do to buildings each year, on average over many years.
Dutrisac’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.
Figures for earthquake risk are published for the city of Montréal as a whole, not for Dutrisac alone.
Shaking damage a year per $1,000 of building value
The typical town in Quebec expects $0.14 a year; Dutrisac expects $0.20, and La Pocatière $0.48.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
Dutrisac is in the top tenth of Canada’s 2,611 towns for earthquake risk; 8.5% rank higher.
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 Dutrisac’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).
Some radon around Dutrisac: 6.8% of area homes over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline. · Radon tests for the Montreal health region
At 6.8% over the guideline, the area around Dutrisac is about level with the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Around Dutrisac, 6.8% of tests topped the guideline, about the same as the typical town 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 Dutrisac’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.
The survey sampled homes around Dutrisac; it can’t tell you your basement’s level.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Dutrisac
Environment and Climate Change Canada issues the weather alerts for Dutrisac; 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. |
Smoke and fire warnings for Dutrisac come through Environment Canada and Alert Ready; the fire map is CWFIS’s.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Dutrisac
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Dutrisac | Low | $0.20 | 6.8% | None listed |
| Chameran/Montpellier 21,170 · 0.9 km | Low | $0.20 | 6.8% | None listed |
| Grenet 12,580 · 0.9 km | Low | $0.20 | 6.8% | None listed |
| Nouveau-Bordeaux 30,171 · 1.4 km | Low | $0.20 | 6.8% | None listed |
| Du College/Hodge 22,329 · 1.9 km | Low | $0.20 | 6.8% | None listed |
| Cartierville 24,617 · 2.7 km | Low | $0.20 | 6.8% | None listed |
| Bois-Francs 35,858 · 2.7 km | Low | $0.20 | 6.8% | None listed |
None of the places around has more fire nearby than Dutrisac (low); Chameran/Montpellier comes closest (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Dutrisac faces
Practical steps for Dutrisac’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?
- Ask the municipality for flood maps.
- Are flood and wildfire insured?
- Is earthquake cover included?
What this data can and can’t tell you
- Radon is a survey. Radon figures pool the survey’s home tests by area: postal areas once their boundaries arrive, the 2007 health region around Dutrisac until then.
- Wildfire counts one way. The wildfire figure is the share of land within 25 km of Dutrisac’s homes burned each year from 1986 to 2025, past fire rather than a forecast, and it can only lower Risk.
- 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 Dutrisac’s.
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Dutrisac without grading them.
Questions about flooding and hazards in Dutrisac
How big is the earthquake risk in Dutrisac?
About $0.20 a year per $1,000 of building value, NRCan’s long-run expectation for Dutrisac.
How is Dutrisac’s Hazard risk Grade worked out?
Dutrisac’s Hazard risk grade is C, built on earthquakes and radon with a one-sided wildfire input.
Is Dutrisac at risk of wildfire?
Not much by Canadian standards: Dutrisac’s band is low, with 0.1% of the land within 25 km burned since 1986 (last in 2025), so wildfire doesn’t change its grade.
Is radon a problem in Dutrisac?
6.8% of the 74 homes Health Canada tested around Dutrisac topped the guideline; your own house needs its own test.
Does Dutrisac flood?
No study on Canada’s Flood Map Inventory covers Dutrisac (0), which doesn’t mean it has never been mapped, so ask the municipality.
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).