Mississauga sits at City Score rank #115 with a standing of 53%, from 7 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 27 places versus 2022 (#88 → #115).
Latest owned placements: building permit value rank #13 of 25 (2025); indoor radon rank #271 of 327 at 60 Bq/m³ survey mean; residential mill rate rank #46 of 57 (10.34 mill rate). Full tables and method notes live on each study edition; atlas readings for the same slug open from the topic buttons.
Against the national corpus, Mississauga carries a City Score standing of 53% (rank #115 of 343) with 7 of 8 pillars observed. That sits 1 points above the Ontario peer average across 123 ranked cities. Within Ontario, Mississauga ranks #59 of 123 on City Score.
The strongest signal in the current chart is broadband download (ISED seed tier) (standing 87%, rank #44 of 343, raw score 1000). The weakest observed pillar is population growth (standing 1%, rank #342 of 343).
Drinking-water hardness on the water atlas reads 125 mg/L as CaCO₃ for Mississauga. Compare that figure to the hardness pillar on the chart and to the national hardness guide on the hub.