Markham sits at City Score rank #3 with a standing of 68%, 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. Rising 46 places versus 2022 (#49 → #3).
Latest owned placements: building permit value rank #2 of 25 (2025); indoor radon rank #269 of 327 at 60 Bq/m³ survey mean; residential mill rate rank #57 of 57 (7.00 mill rate). 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, Markham carries a City Score standing of 68% (rank #3 of 343) with 7 of 8 pillars observed. That sits 15 points above the Ontario peer average across 123 ranked cities. Within Ontario, Markham ranks #3 of 123 on City Score.
The strongest signal in the current chart is property tax (standing 100%, rank #57 of 57, raw score 7). The weakest observed pillar is seismic hazard (standing 36%, rank #125 of 343).
Drinking-water hardness on the water atlas reads 126 mg/L as CaCO₃ for Markham. Compare that figure to the hardness pillar on the chart and to the national hardness guide on the hub.