Photo: P199 · CC BY-SA 4.0A flood study covers Saint-Stanislas-de-Kostka: 1 on the national inventory, the newest from Gouvernement du Québec
Wildfire is rare near Saint-Stanislas-de-Kostka: 0.1% of the land within 25 km has burned since 1986, a burn rate of 0.002% a year. Shaking is a bigger worry than in most places, at $0.19 a year per $1,000 of building value ($0.030 typical). In Health Canada’s survey, 8.2% of homes tested in Saint-Stanislas-de-Kostka’s area exceeded 200 Bq/m³, close to the typical 6.6%. Hazard risk gives Saint-Stanislas-de-Kostka a grade of C−, from earthquakes and radon alone.
What stands out about Saint-Stanislas-de-Kostka’s hazards
Four national sources, each read for Saint-Stanislas-de-Kostka: earthquakes, radon, past fires and flood studies.
What Saint-Stanislas-de-Kostka faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Saint-Stanislas-de-Kostka grades C− for hazard risk
Seismic risk and radon set Saint-Stanislas-de-Kostka’s grade, wildfire can drag it down, and flood mapping stays out of it.
How sure: Earthquake losses are a model’s expectation over many years, not a forecast for any one. Small fires and grass fires are largely missing from the national burned-area record.
Few fires near Saint-Stanislas-de-Kostka: 0.3% within 5 km, 0.1% within 25 km
Fires mapped since 1986 around where Saint-Stanislas-de-Kostka’s residents live, and the fuel next to their homes.
The yearly burn rate around Saint-Stanislas-de-Kostka is 0.002%, low beside 0.000% for the typical Canadian town.
Forest makes up 2.1% of the land within 5 km of Saint-Stanislas-de-Kostka and 2.9% within 25 km, little for a forest fire to run through.
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 514
The land around Saint-Stanislas-de-Kostka burns at 0.002% a year, the 35th highest rate of 514 towns in Quebec; Mistissini tops it 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.
The low band takes in 92% of Canada’s 2,610 towns, Saint-Stanislas-de-Kostka among them, though its rate is above zero; 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.
A flood study covers Saint-Stanislas-de-Kostka, from Gouvernement du Québec: 1 on the inventory
Flood studies whose area touches Saint-Stanislas-de-Kostka, from NRCan’s inventory, each linked to its owner.
Gouvernement du Québec studied flooding in an area that includes Saint-Stanislas-de-Kostka (2005); open its map to see which streets lie in a flood zone.
| Study | By | Year | Status |
|---|---|---|---|
| St-Louis-de-Gonzague | Gouvernement du Québec | 2005 | final |
Towns with a flood study on file
Flood maps are thinner in Quebec, 45% of towns against 58% nationally, but Saint-Stanislas-de-Kostka has one.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Flood studies don’t enter the grade; they are listed so you can open the official map for Saint-Stanislas-de-Kostka.
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.
Earthquakes cost buildings in Saint-Stanislas-de-Kostka $0.19 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.
Saint-Stanislas-de-Kostka’s $0.19 is about 6.5 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
Above the middle in Quebec: Saint-Stanislas-de-Kostka’s $0.19 against a median of $0.14, with La Pocatière highest 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.
Saint-Stanislas-de-Kostka sits above most of Canada’s 2,611 towns on earthquake risk; 12% are 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).
The loss is to Saint-Stanislas-de-Kostka’s buildings alone, from ground shaking; infrastructure and secondary hazards are left out.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
Radon about average around Saint-Stanislas-de-Kostka: 8.2% over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline.
The survey area of Saint-Stanislas-de-Kostka reads 8.2%, a shade from the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
The typical town in Quebec has 8.2% over 200 Bq/m³; Saint-Stanislas-de-Kostka’s area has 8.2%, much the same.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Between 5% and 10% of tests over the guideline: Saint-Stanislas-de-Kostka, and 37% of Canada’s 2,611 towns; 26% 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.
The share describes the area, not a house: in Saint-Stanislas-de-Kostka as anywhere, test to be sure.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Data for radon tests covers the Monteregie health region
Weather and fire alerts for Saint-Stanislas-de-Kostka
Alerts for Saint-Stanislas-de-Kostka come from Environment and Climate Change Canada and, for emergencies, Alert Ready.
| 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. |
Alert Ready carries evacuation orders for Saint-Stanislas-de-Kostka to phones; CWFIS shows the day’s fire danger.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
How Saint-Stanislas-de-Kostka’s neighbours compare on hazards
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Saint-Stanislas-de-Kostka | Low | $0.19 | 8.2% | Yes |
| Saint-Louis-de-Gonzague 2,536 · 7.7 km | Low | $0.19 | 8.2% | Yes |
| Salaberry-de-Valleyfield 47,002 · 7.7 km | Low | $0.19 | 8.2% | None listed |
| Sainte-Barbe 1,993 · 8.5 km | Low | $0.17 | 8.2% | None listed |
| Les Coteaux 6,294 · 10 km | Low | $0.16 | 8.2% | None listed |
| Godmanchester 1,590 · 12 km | Low | $0.20 | 8.2% | Yes |
| Saint-Zotique 10,445 · 12 km | Low | $0.11 | 8.2% | None listed |
Saint-Stanislas-de-Kostka’s low band tops its neighbours; Saint-Louis-de-Gonzague is next (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Saint-Stanislas-de-Kostka faces
Practical steps for Saint-Stanislas-de-Kostka’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 Saint-Stanislas-de-Kostka’s.
- Wildfire counts one way. The wildfire figure is the share of land within 25 km of Saint-Stanislas-de-Kostka’s homes burned each year from 1986 to 2025, past fire rather than a forecast, and it can only lower Risk.
- Radon is a survey. About 14,000 homes were tested across Canada in 2009–2011, and the share over the guideline for Saint-Stanislas-de-Kostka is its health region’s, the survey’s design unit.
- Flood studies aren’t flood zones. NRCan’s inventory says where flood mapping exists, not where water goes; the map’s owner is the authority for Saint-Stanislas-de-Kostka.
Questions about flooding and hazards in Saint-Stanislas-de-Kostka
Does Saint-Stanislas-de-Kostka flood?
There is flood mapping for Saint-Stanislas-de-Kostka on the national inventory, each study linked to its owner’s map, none of them graded.
Is radon a problem in Saint-Stanislas-de-Kostka?
8.2% of the 110 homes Health Canada tested around Saint-Stanislas-de-Kostka topped the guideline; your own house needs its own test.
How big is the earthquake risk in Saint-Stanislas-de-Kostka?
Expected earthquake damage in Saint-Stanislas-de-Kostka comes to $0.19 a year for each $1,000 that buildings are worth.
Is Saint-Stanislas-de-Kostka at risk of wildfire?
Not much by Canadian standards: Saint-Stanislas-de-Kostka’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 is Saint-Stanislas-de-Kostka’s Hazard risk Grade worked out?
Saint-Stanislas-de-Kostka grades C− for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers 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).