A boil water notice is one of the most common emergencies a small city faces, and one of the most time-sensitive. Your water system’s operator and your state drinking water program decide whether a notice is needed and what it must say. This post is about the communications side: getting the message to residents fast, in a form everyone can use.
Federal rules set the outer limit. Under the EPA’s Public Notification Rule, the most urgent (“Tier 1”) notices must reach customers as soon as practical and within 24 hours. Your state may require more.
Before: set it up on a calm day
- Write the template now, with your operator and state program: the boil instructions, affected area, where to get bottled water, and who to call.
- Translate it into the languages your community speaks.
- Decide who can publish at 2 a.m. without waiting for approval.
- Collect contacts: residents who signed up for texts and emails, local media, schools, the health department, nursing homes, restaurants.
- Run a drill once a year.
The first hour
- Confirm the facts with your operator: affected area (streets or a map), start time, what to do, and when you’ll update next.
- Switch the website. Put the notice at the top of the homepage — not a news post three clicks down. Keep the emergency page light so it loads on a weak phone signal.
- Send texts and emails to subscribers in the affected area, with a link to the full notice.
- Post the same words everywhere: social media, the 311 app, your phone message. Consistency prevents confusion.
- Notify critical customers directly: schools, care homes, medical offices, restaurants.
- Set a time for the next update and say it in the notice.
What the notice should say
Follow your state’s required wording. The EPA’s emergency disinfection guidance gives the instruction most notices use: bring water to a rolling boil for at least one minute, then let it cool. Also include:
- Which addresses are affected — a map and a list of streets, so it works for everyone
- What the water is safe for and not safe for
- Where to get bottled water, with hours
- A phone number answered around the clock
Lifting the notice
When the operator confirms it’s safe, say so the same way you announced it: homepage, texts, emails and social media — plus any flushing instructions.
How Sentra CMS helps
Emergency mode in Sentra CMS switches the homepage to a pre-reviewed emergency page with one action, sends the alert by banner, email, text and app notice, and keeps a log of every step. Templates for boil water, severe weather, floods and outages are ready in English and Spanish. See emergency mode