Photo: BAnQ · Public domainSaint-André-d'Argenteuil is on Canada’s flood inventory: 1 listed, led by Communauté métropolitaine de Montréal
Since 1986 almost nothing has burned near Saint-André-d'Argenteuil: 0% of the land within 25 km, or 0.001% a year. Shaking is a bigger worry than in most places, at $0.14 a year per $1,000 of building value ($0.030 typical). Radon is higher than usual: 10% of tested homes in the survey area topped the guideline, against 6.6% for the typical town. Hazard risk gives Saint-André-d'Argenteuil a grade of C−, from earthquakes and radon alone.
What stands out about Saint-André-d'Argenteuil’s hazards
Four national sources, each read for Saint-André-d'Argenteuil: earthquakes, radon, past fires and flood studies.
What Saint-André-d'Argenteuil faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Saint-André-d'Argenteuil: C−
For Saint-André-d'Argenteuil, Risk will be the average of earthquakes and radon, with wildfire added only if it makes the average worse.
Its place: #417 of 507 in Quebec and #2,403 of 2,589 Canadian towns.
How sure: Earthquake losses are a model’s expectation over many years, not a forecast for any one. Only 78 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.
Wildfire is rare near Saint-André-d'Argenteuil: 0% of the land within 25 km burned since 1986, 0% within 5 km
Fires mapped since 1986 around where Saint-André-d'Argenteuil’s residents live, and the fuel next to their homes.
The yearly burn rate around Saint-André-d'Argenteuil is 0.001%, low beside 0.000% for the typical Canadian town.
Saint-André-d'Argenteuil’s homes have had no fire within 5 km since 1986; the closest was 12 km away.
Near or far, forest fuel covers a similar share around Saint-André-d'Argenteuil: 7.3% within 5 km and 8.3% within 25 km.
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, Saint-André-d'Argenteuil 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.
Beside 2,610 Canadian towns, Saint-André-d'Argenteuil reads low, with 92% of them; only 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.
Communauté métropolitaine de Montréal has mapped flooding for Saint-André-d'Argenteuil (1 study)
Flood studies whose area touches Saint-André-d'Argenteuil, from NRCan’s inventory, each linked to its owner.
The flood study touching Saint-André-d'Argenteuil is Communauté métropolitaine de Montréal’s, dated 2008; its own map shows the zones street by street.
| Study | By | Year | Status |
|---|---|---|---|
| Montréal-Argenteuil-Deux-Montagnes-Vaudreuil-Soulanges | Communauté métropolitaine de Montréal | 2008 | final |
Towns with a flood study on file
Saint-André-d'Argenteuil is one of the 45% of towns in Quebec with a flood study on file, fewer than Canada’s 58%.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Flood is shown here, never graded: a study says where a map exists, not how many of Saint-André-d'Argenteuil’s homes stand in a flood zone.
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 Saint-André-d'Argenteuil: $0.14 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.
Saint-André-d'Argenteuil’s $0.14 is about 4.6 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
The median in Quebec is $0.14; Saint-André-d'Argenteuil, at $0.14, is right beside it, and La Pocatière tops the list at $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.
More earthquake risk than most: only 20% of Canada’s 2,611 towns are above Saint-André-d'Argenteuil.
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 Saint-André-d'Argenteuil’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).
Test for radon in Saint-André-d'Argenteuil: 10% of area homes were over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline.
Saint-André-d'Argenteuil’s area, at 10%, is above the 6.6% of the typical Canadian town, so testing is worth more here than most places. Saint-André-d'Argenteuil doesn’t get its own radon tests figures; the ones here come from the Laurentides health region.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Around Saint-André-d'Argenteuil, 10% of tests were over 200 Bq/m³ and 1.3% over 600, against a median of 8.2% in Quebec.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Saint-André-d'Argenteuil is in the 10–20% band, with 22% of Canada’s 2,611 towns; only 4.6% are 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 Saint-André-d'Argenteuil only a test can say.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Saint-André-d'Argenteuil
Environment and Climate Change Canada issues the weather alerts for Saint-André-d'Argenteuil; 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 Saint-André-d'Argenteuil, 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)
Hazards in the places around Saint-André-d'Argenteuil
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Saint-André-d'Argenteuil | Low | $0.14 | 10% | Yes |
| Lachute 15,469 · 9.8 km | Low | $0.13 | 10% | Yes |
| East Hawkesbury 3,787 · 9.8 km | Low | $0.20 | 6.1% | None listed |
| Rigaud 8,187 · 11 km | Low | $0.14 | 8.2% | Yes |
| Saint-Placide 1,751 · 12 km | Low | $0.17 | 10% | Yes |
| Brownsburg-Chatham 8,466 · 13 km | Low | $0.12 | 10% | None listed |
| Très-Saint-Rédempteur 1,163 · 15 km | Low | $0.18 | 8.2% | None listed |
Among its neighbours Saint-André-d'Argenteuil has the most fire on record (low); Lachute follows (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Saint-André-d'Argenteuil faces
Practical steps for Saint-André-d'Argenteuil’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
- Flood studies aren’t flood zones. The flood inventory points to maps; it is incomplete and not the official source, so ask the municipality about any street in Saint-André-d'Argenteuil.
- Earthquakes are modelled. NRCan models what earthquakes would cost buildings each year on average, subdivision by subdivision; Saint-André-d'Argenteuil’s figure is its subdivision’s.
- Wildfire counts one way. Wildfire is read from the national burned-area record around Saint-André-d'Argenteuil’s homes since 1986, a history of fire that may lower Risk but never raises it.
- Radon is a survey. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Saint-André-d'Argenteuil takes its 2007 health region’s share.
Questions about flooding and hazards in Saint-André-d'Argenteuil
How big is the earthquake risk in Saint-André-d'Argenteuil?
Expected earthquake damage in Saint-André-d'Argenteuil comes to $0.14 a year for each $1,000 that buildings are worth.
Is Saint-André-d'Argenteuil at risk of wildfire?
Not much by Canadian standards: Saint-André-d'Argenteuil’s band is low, with 0% of the land within 25 km burned since 1986 (last in 2022), so wildfire doesn’t change its grade.
How is Saint-André-d'Argenteuil’s Hazard risk Grade worked out?
Saint-André-d'Argenteuil’s Hazard risk grade is C−, built on earthquakes and radon with a one-sided wildfire input.
Is radon a problem in Saint-André-d'Argenteuil?
10% of the 78 homes Health Canada tested around Saint-André-d'Argenteuil topped the guideline; your own house needs its own test.
Does Saint-André-d'Argenteuil flood?
The inventory lists a study touching Saint-André-d'Argenteuil; whether a given street floods is on that map, not in the grade.
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).