Boil water advisories in New Hampshire
We do not read this state's advisories
We checked New Hampshire DES's site on 4 October 2026, and it publishes its own list of active boil water advisories. We do not read that list into this page, so open it directly for what it shows now.
New Hampshire DES's list of active advisories
New Hampshire's advisory list refused our automated request with HTTP 403 on 24 August 2026. On 4 October 2026 it opened in a browser, headed Active Advisories, with each entry naming its water system's PWS ID and the date the advisory was issued. Open it in a browser for the current list.
This is not a statement that your water is safe. We do not read this state's advisories, so this page cannot tell you whether one is in force. Your utility is the authority for your own water.
Where to check instead
Our database holds 187 public water systems in New Hampshire. That is a count of what is in our database, not a count of every public water system in the state.
The largest systems we hold data on here, by the population each one reports serving:
- MANCHESTER WATER WORKS
- PENNICHUCK WATER WORKS
- CONCORD WATER DEPT
- AQUARION WATER/NH
- PORTSMOUTH WATER WORKS
- KEENE WATER DEPT
- DOVER WATER DEPT
- MERRIMACK VILLAGE DIST
- ROCHESTER WATER DEPT
- DERRY WATER DEPT
Or start from a ZIP code:
Check a ZIP code
Enter a ZIP code and we will show you the water systems we hold for it, and what the state agency's list said about each one when we last read it.
Questions about this page
- Does this page list every boil water advisory in New Hampshire?
- No. We do not read New Hampshire DES's advisories into this page, so nothing on it is a list of what is in force. What this page carries instead is where those advisories are published and which water systems our own database holds.
- Where are boil water advisories for New Hampshire published?
- New Hampshire DES publishes its own list of active advisories, and this page links to it. We checked it on 4 October 2026. New Hampshire's advisory list refused our automated request with HTTP 403 on 24 August 2026. On 4 October 2026 it opened in a browser, headed Active Advisories, with each entry naming its water system's PWS ID and the date the advisory was issued. Open it in a browser for the current list.
- How many water systems does this page cover?
- Our database holds 187 public water systems in New Hampshire. That is a count of what is in our database, not a count of every public water system in the state. Advisories are counted by water system, keyed on the system's federal identifier, and never by the number of separate notices one system has been given.
- Is anything on this page a verdict about whether the water is safe?
- This is not a statement that your water is safe. We do not read this state's advisories, so this page cannot tell you whether one is in force. Your utility is the authority for your own water.
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