Saskatchewan Radon Map: Every Home Health Canada Tested, and What It Read

1,365 homes across Saskatchewan were long-term tested for radon in the two federal surveys. Every one is a dot on this map, coloured by what it read, with the number of tested homes printed beside every district figure.

The Map

Every dot is one tested house. Zoom in for street names. Shaded districts had no home tested in either survey.

under 100100 to 147148 to 199200 and aboveno homes tested

1,365 measurements shown. Dot positions inside a district are illustrative, not addresses. The survey records which district a home was in, never where it stood. Tap any dot for its reading, or any district for its count and median. Rural districts here cover thousands of square kilometres, so a dot in one says very little about any particular corner of it.

Built from Health Canada's published measurements under the Open Government Licence. We do not sell radon testing or mitigation.

What the Numbers Say

20%
of tested Saskatchewan homes at or above Canada's 200 Bq/m³ action level
107
median reading, Bq/m³
2,165
highest single reading, in S0L

Saskatchewan sits 9th of the 33 places mapped with a hundred or more tested homes, at 20.0% at or above the action level, between Halifax at 35.2% and Toronto and the GTA at 2.2%. All on the same two surveys and the same method. The spread between places is real, and the spread between houses on one street is bigger still.

The Number Changes Depending on Whose Limit You Use

Canada acts at 200 Bq/m³. The United States EPA acts at about 148. The World Health Organization sets a reference level of 100. Applied to the same 1,365 homes:

20%
at or above Canada's 200
33%
at or above the US EPA's 148
55%
at or above the WHO's 100

Same houses, same measurements. Why the three numbers differ, and which one to use.

By Postal District, with the Sample Sizes Shown

Read the count column before the median column. A district resting on four houses is a hint, not a verdict, and those rows are greyed. The land area column matters too: a district covering ten thousand square kilometres is an average across a region, not a neighbourhood.
DistrictLand km²Homes testedMedianHighestAt or over 200
S4R3219293113315
S4W1622832852
S4T142219876611
S7L28181934628
S4P54591906304
S4S1924189133510
S4Y1061863771
S7T11431751920
S7W1741712131
S7M22141492924
S4N252514559912
S4V25121443822
S4X14161404887
S0N36,9436613797519
S7S351362421
S7K901241292483
S7H14201264246
S0G35,86449124171815
S0H30,93667124106215
S9V1,188121231770
S9H1,763311183985
S0L29,28274116216518
S0A33,99810311558726
S6J1091121800
S3N1,620291062853
S4L22171052301
S7J11191051690
S0E27,3247610245513
S7V4281022701
S4A790141002751
S9X3,886151002071
S0C19,91953984177
S6H1,65951962865
S9A82718962363
S6V2,86439915472
S0K31,70374907557
S7R33871180
S4H82824863934
S0J205,6721308583322
S7N1620812512
S0M107,61784783368
S0P4964744558
S6X23351230

32 districts have ten or more tested homes, which is where these figures start to mean something. The districts with no measurement at all are S2V, S4K, S4Z, S6K, S6W, S7A, S7B, S7C, S7P.

What Actually Settles It

Nothing on this page describes your house. Radon varies enormously between homes on the same street, because it depends on how each building sits on and draws air from the ground beneath it. The highest reading here is 2,165 Bq/m³ and it sits in a district whose median is far below it. A long-term test in your own home is the only measurement that tells you anything about your home.

Also: every C-NRPP certified radon company here, the other city and province maps, and what radon actually is.

Sources and method. Radon measurements: Health Canada, Radon and Thoron Data From Canadian Homes (Regina and Saskatoon CMAs) pooled with the Cross-Canada Survey of Radon Concentrations in Homes 2009-2011, both under the Open Government Licence – Canada. Boundaries: Statistics Canada 2021 cartographic forward sortation area file, same licence. Percentages are calculated from the individual measurements shown, not quoted from a summary. Land areas are from the Statistics Canada boundary file.