Hazard risk in Trinity Commons is lower than in 89% of Canadian towns
Fire has left almost no mark near Trinity Commons: 0% of the land within 25 km since 1986, 0.000% a year. NRCan expects $0.030 of shaking damage a year per $1,000 of buildings in Trinity Commons, near the typical $0.030. In Health Canada’s survey, just 0% of homes tested in the area exceeded 200 Bq/m³ (6.6% typical). Hazard risk gives Trinity Commons a grade of A, from earthquakes and radon alone.
What stands out about Trinity Commons’s hazards
Four national sources, each read for Trinity Commons: earthquakes, radon, past fires and flood studies.
What Trinity Commons faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Trinity Commons grades A for hazard risk
Seismic risk and radon set Trinity Commons’ grade, wildfire can drag it down, and flood mapping stays out of it.
Its place: #105 of 866 in Ontario and #417 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 Trinity Commons has burned: 0% within 5 km, 0% within 25 km since 1986
Fires mapped since 1986 around where Trinity Commons’ residents live, and the fuel next to their homes.
The yearly burn rate around Trinity Commons is 0.000%, low beside 0.000% for the typical Canadian town.
Close to Trinity Commons there is little to burn (0.1% forest fuel within 5 km), but 5.2% of the land within 25 km is forest.
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 Ontario · highest of 871
Fire has taken almost none of the land around Trinity Commons, as for 638 of the 871 towns in Ontario; Sioux Lookout tops the list at 0.16%.
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.
Most of the country’s 2,610 towns are low-band (92%, against 7.5% above); around Trinity Commons, burning rounds to zero.
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 Trinity Commons, from Toronto Regional Conservation Authority: 1 on the inventory
Flood studies whose area touches Trinity Commons, from NRCan’s inventory, each linked to its owner.
One study on the inventory touches Trinity Commons, Toronto Regional Conservation Authority’s from 2021, and its area can be large, so it says a map exists, not that the town floods.
| Study | By | Year | Status |
|---|---|---|---|
| Toronto Floodline Consolidation | Toronto Regional Conservation Authority | 2021 | final |
Towns with a flood study on file
Its flood study puts Trinity Commons with 69% of towns in Ontario; Canada’s share is 58%.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Nothing here counts toward Risk; the studies are pointers to the maps their owners keep for Trinity Commons.
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.
Expected shaking damage in Trinity Commons: $0.030 a year per $1,000
NRCan’s seismic risk model: the damage shaking is expected to do to buildings each year, on average over many years.
With $0.030 of shaking damage a year per $1,000, Trinity Commons sits right at the typical $0.030.
Trinity Commons doesn’t get its own earthquake risk figures; the ones here come from the city of Brampton.
Shaking damage a year per $1,000 of building value
The typical town in Ontario expects $0.043 a year in shaking damage; Trinity Commons expects less, $0.030, and Alexandria the most, $0.21.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
Trinity Commons sits mid-range among Canada’s 2,611 towns: 48% expect more shaking damage.
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 Trinity Commons’ 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).
Little radon around Trinity Commons: 0% of area homes over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline. · Measured across the Peel Regional Health Unit: radon tests
Where the typical Canadian town has 6.6% of homes over the guideline, Trinity Commons’ area has fewer, 0%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
The median in Ontario is 4% over 200 Bq/m³; around Trinity Commons it is 0%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Few tests over the guideline: Trinity Commons shares the bottom band with 37% of Canada’s 2,611 towns, below the other 63%.
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 Trinity Commons as anywhere, test to be sure.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Trinity Commons
Environment and Climate Change Canada issues the weather alerts for Trinity Commons; 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. |
In fire season, check CWFIS for danger and active fires around Trinity Commons, and listen to local authorities for orders.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Trinity Commons
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Trinity Commons | Low | $0.030 | 0% | Yes |
| Deerfield 13,090 · 1.1 km | Low | $0.030 | 0% | Yes |
| N-Section (bramalea) 7,513 · 1.5 km | Low | $0.030 | 0% | Yes |
| Rosedale Village 5,764 · 1.7 km | Low | $0.030 | 0% | Yes |
| Springdale 13,221 · 1.8 km | Low | $0.030 | 0% | Yes |
| M-Section (bramalea) 9,901 · 2.0 km | Low | $0.030 | 0% | Yes |
| Lakelands Village 9,636 · 2.2 km | Low | $0.030 | 0% | Yes |
The neighbour with the most fire is Deerfield (low), still no more than Trinity Commons (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Trinity Commons faces
Practical steps for Trinity Commons’ 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.
- Clear needles and wood nearby.
- Keep a grab-and-go bag ready.
- In smoke, stay in; filter air.
- Has it had a radon test?
- Check the address on the flood map.
- Are flood and wildfire insured?
What this data can and can’t tell you
- 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 Trinity Commons floods.
- 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 Trinity Commons sits in.
- Wildfire counts one way. Wildfire is read from the national burned-area record around Trinity Commons’ homes since 1986, a history of fire that may lower Risk but never raises it.
- Earthquakes are modelled. NRCan models what earthquakes would cost buildings each year on average, subdivision by subdivision; Trinity Commons’ figure is its subdivision’s.
Questions about flooding and hazards in Trinity Commons
Is radon a problem in Trinity Commons?
0% of the 90 homes Health Canada tested around Trinity Commons topped the guideline; your own house needs its own test.
Is Trinity Commons at risk of wildfire?
No meaningful wildfire history near Trinity Commons: 0% of nearby land since 1986, band low.
How is Trinity Commons’s Hazard risk Grade worked out?
Trinity Commons grades A for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
Does Trinity Commons flood?
Trinity Commons’ area has been studied for flooding, and the owner’s map shows which streets lie in a zone; the grade leaves flood out.
How big is the earthquake risk in Trinity Commons?
Expected earthquake damage in Trinity Commons comes to $0.030 a year for each $1,000 that buildings are worth.
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).