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Sarnia, Ontario
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Sarnia

The Rapids renamed for Guernsey

Sarnia in brief

Sarnia sits where Lake Huron empties into the St. Clair River across from Port Huron, Michigan, the largest Canadian city on Lake Huron. La Salle called the harbour The Rapids; villagers later took Sarnia, Latin for Guernsey, after Lieutenant-Governor Sir John Colborne's Channel Island home.

More than 60 chemical plants and oil refineries cluster in the riverside stretch known as Chemical Valley. That industrial shoreline still defines Canada's side of the bluewater border.

Drawn from Wikipedia, Atlas Obscura.

Permits, tax, radon & more for Sarnia

Open the live numbers for Sarnia. Each link goes to the original topic page for this city.

PermitsBrowseBuilding permits overviewTaxProperty tax for SarniaInternetInternet for SarniaRadonRadon for SarniaHazardsHazards for SarniaWaterWater quality for Sarnia

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#106
City Score rank
22%
City Score
2
Owned lists in score

City Score over time

The green line averages OpenStats-owned rankings (radon, permit value, mill rates). Grey dots mark every published placement across all studies below.

0%25%50%75%100%201420152017201820242026
OpenStats City ScoreIndividual published rankings

Rankings for Sarnia

Each study below is its own ranking. Where a study has more than one edition for this city, the chart shows standing across those years only.

Composite · OpenStats

OpenStats City Score

OpenStats

Average standing across OpenStats-owned rankings built from public data (currently radon, building permit value, and residential mill rates). Each placement is scored from 0–1 within its edition, then averaged. External livability lists stay on hometown pages as separate published appearances.

Single edition · 2026

#106
Published · 2026 · of 125
Score 0.221

Only one published edition places Sarnia in this study so far. Open the edition for method notes and the full table.

Original source · Full edition

Health · OpenStats

OpenStats Highest Indoor Radon

OpenStats

Communities ranked by Health Canada survey mean indoor radon (Bq/m³). Rank 1 is the highest mean.

Single edition · 2026

#19
Published · 2026 · of 117
Score 156.4

Only one published edition places Sarnia in this study so far. Open the edition for method notes and the full table.

Original source · Full edition

Property tax · OpenStats

OpenStats Residential Mill Rates

OpenStats

Municipalities ranked by residential mill rate. Rank 1 is the highest published rate (higher tax burden).

Single edition · 2024

#12
Published · 2024 · of 43
Score 16.07

Only one published edition places Sarnia in this study so far. Open the edition for method notes and the full table.

Original source · Full edition

Worth knowing in Sarnia

Distinctive local notes and places, each linked to its source.

  • Sarnia is a city in Lambton County, Ontario, Canada.

    Wikipedia

  • Sarnia is located on the eastern bank of the junction between the Upper and Lower Great Lakes, where Lake Huron flows into the St.

    Wikipedia

  • Clair River in the Southwestern Ontario region, which forms the Canada–United States border, directly across from Port Huron, Michigan.

    Wikipedia

  • More than 60 chemical plants and oil refineries cluster in a 15-mile stretch outside Sarnia known as Chemical Valley.

    Atlas Obscura

Places to see

Chemical Valley

A dense petrochemical corridor of dozens of plants and refineries along the St. Clair River.

Related guides

Indoor radonBuilding permitsMill ratesNatural hazardsBroadbandWater hardnessConstruction PulseStudies

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