Maryland now has a good database of testing locations, public and private,
with details. It loads slowly (maybe a minute after you enter a zip code),
but it's good. It includes places with same day (rapid) testing. By
contrast, I did a county test Sunday, and still haven't heard anything
(four days later).
https://maryland.maps.arcgis.com/apps/instant/nearby/index.html?appid=0a52c4f1510445218fcc06a4ae9a4163
