The phrase "citywide level" means something that applies to or affects the entire city, rather than just a specific area or neighborhood within the city. Full definition
Although I didn't have any children, you couldn't help but be caught up in the mobilization and debates on a local and citywide level about the perils and benefits of school closures and charter take overs. (gse.harvard.edu)
In her latest campaign finance filing, however, she began receiving contributions at the citywide level of $ 4,950. (politico.com)
For assessment purposes, a tracking tool can provide incisive data about student attendance, program popularity, and student participation — from a programwide to citywide level. (edutopia.org)