Completely remove postgres after brew uninstall OSX

Question

I would like to know how to completely remove PostgreSQL on macOS Sierra (10.13.6). I've used this command line:

brew uninstall postgres

But when I reinstall with brew install postgres I have the old config & content. I would like to make fresh install.

Answer 1

for completely reinstalling postgresql initially run brew doctor and brew update

now uninstall postgresql by running

brew uninstall postgresql
rm -rf /usr/local/var/postgres
rm -rf .psql_history .psqlrc .psql.local .pgpass .psqlrc.local

now reinstalling postgresql will not bring back the previous configs and content