N7S vs N7W

Ontario

This page does not pick a winner. Every row shows two measurements and the gap between them. There is no score, no tally of which area “wins” more categories, and no overall result — those would be a rating of two places and the people who live in them, assembled by the layout.

Both areas are forward sortation areas, and every figure describes the whole of one. Crime is not shown here: it is reported at the metropolitan level, so for two areas in the same city it is usually the same number twice. It is on each area’s own page, with the geography it describes.

Selected 2021 Census figures for N7S and N7W, with the national figure for scale. The last column states the gap between the two areas as a direction and a size, never as a preference.
Measure	N7S	N7W	Canada	Difference
Median household income	$93,000	$81,000	$84,000	N7S is 15% higher than N7W
Median after-tax income	$81,000	$71,500	$73,000	N7S is 13% higher than N7W
Median age	42.4	66.5	41.6	N7S is 36% lower than N7W
Unemployment rate	12.2%	9.6%	10.3%	N7S is 27% higher than N7W
Low income (LIM-AT)	8.1%	5.7%	11.1%	N7S is 42% higher than N7W
Average household size	2.5	2	2.4	N7S is 25% higher than N7W

How each area sits against the city or province around it — a different geography on each side, named in every cell. Read down a column, not across: the two columns are measured against different places and a bigger gap in one says nothing about the other.
Measure	N7S	N7W
Median household income	12% higher than Sarnia	about the same as Sarnia
Median after-tax income	11% higher than Sarnia	about the same as Sarnia
Median age	8% lower than Sarnia	45% higher than Sarnia
Unemployment rate	about the same as Sarnia	19% lower than Sarnia
Low income (LIM-AT)	18% lower than Sarnia	42% lower than Sarnia
Average household size	9% higher than Sarnia	13% lower than Sarnia

N7S is measured against Sarnia, the metropolitan area holding 100% of its residents.
N7W is measured against Sarnia, the metropolitan area holding 100% of its residents.

Counts for each area. These describe the place and are not compared as ratios.
Measure	N7S	N7W
Province	Ontario	Ontario
Population	28,410	2,578
Private dwellings	11,643	1,316
Land area	16 km²	36 km²

Share of each area’s residents with an amenity within reach, weighted by where people live. A blank is a coverage fact, not a zero.
Amenity	Within	N7S	N7W
Grocery store	1 km walk	76%	82%
Public transit	1 km walk	0%	0%
Park	1 km walk	78%	42%
Pharmacy	1 km walk	32%	0%
Child care	1.5 km walk	97%	41%
Primary school	1.5 km walk	74%	39%
Secondary school	1.5 km walk	74%	39%
Library	1.5 km walk	14%	0%
Health care	3 km drive	100%	100%
Employment	10 km drive	100%	100%

These measure how close an amenity is, never its quality. A school 500 m away is a school 500 m away — nothing here says anything about the school itself.
The proximity index is scaled against all of Canada, where 1 is the single most well-served block in the country and the national average is close to zero. It is useful for comparing places and misleading as a score.

CMHC does not survey a rental zone covering either N7S or N7W. The survey covers centres of 10,000 people and up, so there is nothing published for either area.

The air quality index is a reading at the nearest station, which may be far away — the distance is shown because it decides whether the reading describes the area at all. Facility counts are reported releases within 10 km.
Measure	N7S	N7W
Nearest AQHI station	Sarnia · 3.5 km	Sarnia · 1.1 km
Current reading	2.12 — Low risk	2.12 — Low risk
Reporting facilities within 10 km	31	36
Reported releases to air	51,225 t	52,805 t

N7S: Measured at Sarnia, 3.5 km from N7S. The index runs from 1 upward and combines ozone, fine particulate matter and nitrogen dioxide into one health-risk scale.
N7W: Measured at Sarnia, 1.1 km from N7W. The index runs from 1 upward and combines ozone, fine particulate matter and nitrogen dioxide into one health-risk scale.

This page carries the figures the two areas can be set against each other on. Each area’s own page has the rest — including crime, the boundary map, and every source note and caveat in full.

N7S in full · N7W in full

Source: Census Profile, 2021 Census (98-401-X). Data current as of 2026-08-12. Statistics Canada Open Licence. Each figure describes a whole forward sortation area. Amenity, rent and air figures carry their own sources and vintages on the area pages.