How Do I Allow Select Notifications To Come Through When Do Not Disturb Is On?

I have the Do Not Disturb feature set when I go to bed. However I have configured it to allow calls from people in my favorites to go through. Can this be done with Notifications? There are a few apps that alert me to things like water leaks or emergencies that I would like to receive even when the Do Not Disturb is activated.
How can I do this without turning all notifications off except for the ones I want to come through at night?
Thanks in advance for your time answering my questons!
Cheers,
—–
Ed Weaver