Boil water advisories in New Hampshire
We do not read this state's advisories
We read New Hampshire DES's page and did not find a list of active advisories on it; the dated record of what we found is below. That is one page on one day, not a statement about what New Hampshire DES publishes. Advisories may still be issued by your utility or your county directly.
We read New Hampshire DES's advisories page on 24 August 2026 and found no advisories on it: it is a hub with three tabs, carrying no table and no dates. Its drinking-water tab offers one button, "View All Current Advisories", pointing at www4.des.state.nh.us — which answered our request the same day with HTTP 403. We have never seen that page, so we do not link it here as a list. A browser may well open it where ours was refused.
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 167 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
- DOVER WATER DEPT
- MERRIMACK VILLAGE DIST
- ROCHESTER WATER DEPT
- LACONIA WATER WORKS
- HUDSON WATER DEPT
- UNH/DURHAM WATER SYS
- SEABROOK WATER DEPT
- EXETER 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 is the agency this page links to. We read its page and did not find a list of active advisories on it. That is one page on one day, not a statement about what New Hampshire DES publishes, and a utility or a county may issue a notice directly. We read New Hampshire DES's advisories page on 24 August 2026 and found no advisories on it: it is a hub with three tabs, carrying no table and no dates. Its drinking-water tab offers one button, "View All Current Advisories", pointing at www4.des.state.nh.us — which answered our request the same day with HTTP 403. We have never seen that page, so we do not link it here as a list. A browser may well open it where ours was refused.
- How many water systems does this page cover?
- Our database holds 167 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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