From Sanford utility:
Customers, if you are ever in doubt that you are in the Boil Water Notice area – the City offers an interactive digital map. All you need to do is enter your address and you will see if you are in the affected area. Please share this information with your friends and neighbors especially. Here’s a link to the webpage and the image here demonstrates what it looks like on the City’s website. Thank you.
https://sanfordfl.gov/alerts-and-notifications/