Multiple apps vs security filters vs other?

[tcanelli]

We currently have 11 apps - all use the same data set - apps are identical except for the filter. See sample pic. Each evacuation center has a diff app filtered for that location.

My question is - is there a better/easier way to do this? We want the users assigned to a specific location to only see what is filtered for that location but can this be done through app vs 11?

This would increase the number of users in one app significantly as all 11 sites would now be in one. Does that slow performance? All are using the same database so potentially performance would be slow regardless.

Is there a way to have one app that a user can login to , select their location and then have all views filtered for them?

Any expert guidance would be appreciated.