Longueuil sits at City Score rank #305 with a standing of 41%, from 5 of 8 open-data pillars (tax, construction, connectivity, indoor air, water, seismic hazard, growth, safety). Missing pillars score at median standing so thin coverage cannot inflate the rank. Dropping 26 places versus 2022 (#279 → #305).
Latest owned placements: indoor radon rank #72 of 327 at 126 Bq/m³ survey mean. Full tables and method notes live on each study edition; atlas readings for the same slug open from the topic buttons.
On the latest OpenStats pass, Longueuil carries a City Score standing of 41% (rank #305 of 343) with 5 of 8 pillars observed. That sits 6 points below the Quebec peer average across 34 ranked cities. Within Quebec, Longueuil ranks #30 of 34 on City Score.
The strongest signal in the current chart is broadband download (ISED seed tier) (standing 81%, rank #66 of 343, raw score 1000). The weakest observed pillar is seismic hazard (standing 10%, rank #35 of 343).
Drinking-water hardness on the water atlas reads 181 mg/L as CaCO₃ for Longueuil. Compare that figure to the hardness pillar on the chart and to the national hardness guide on the hub.