Poly B in Nanaimo, neighbourhood by neighbourhood
Poly B risk in Nanaimo is mostly a question of when each neighbourhood was built. These profiles read every Nanaimo neighbourhood's census construction periods against the 1978 to 1998 installation window, the same scoring the address checker uses.
The Nanaimo picture
Of the 21 Nanaimo neighbourhoods we profiled, 4 sit in the high likelihood band (largely built 1976 to 1998), 15 are moderate (edge of the era), and 2 are lower likelihood. Find yours below, or use the address checker for a street-level answer.
High likelihood 4
Moderate likelihood 15
- Chase River / Duke pt / South Endmostly 1961 to 1980
- Chase River / Duke pt / South Endmostly 1961 to 1980
- City Center / Protection Islandmostly 2016 to 2021
- Departure Baymostly 1961 to 1980
- Dovermostly 2006 to 2010
- Hammond Baymostly 2016 to 2021
- Harewoodmostly 2016 to 2021
- Linley Valleymostly 1961 to 1980
- Long Lakemostly 2016 to 2021
- Newcastlemostly 1961 to 1980
- Northfieldmostly 1961 to 1980
- Oceanviewmostly 1961 to 1980
- Pleasant Valley / Rutherfordmostly 1991 to 2000
- Vancouver Island Universitymostly 1961 to 1980
- Westwoodmostly 1991 to 2000
Lower likelihood 2
Sources for these profiles
- Municipal open data: Nanaimo neighbourhood boundaries and predominant construction eras
- Statistics Canada, 2021 Census of Population, period of construction by dissemination area
- Alberta Municipal Affairs, Safety Tips: Polybutylene (Poly-B) Pressure Water Piping
Profiles describe areas, never individual homes. Only a look at the pipe confirms anything; the identification guide shows where to look.

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