Water Service Outages in New Hampshire by City
94% of New Hampshire's 706 community water systems serve 3,300 people or fewer, so many outages and boil water notices affect a single small town or subdivision.
New Hampshire drinking water record
Busiest year: 2023 (102 violations). Counted by the year the violation period began. Source: EPA SDWIS.
- Community water systems: 706 active systems serve about 922,702 people. 663 of them (94%) serve 3,300 people or fewer; 641 draw mainly on groundwater and 65 on surface water.
- Health-based violations since 2015: 801, at 239 systems (34% of all systems). That share is 26th of 50 states (1 = lowest).
- Most common problems: contaminant averages over the limit (522); uncorrected Ground Water Rule deficiencies (70); coliform treatment technique (42). Source: EPA SDWIS
- Largest system: Manchester Water Works, about 123,500 people, with 0 health-based violations since 2015. Source: EPA SDWIS
- Housing age: the median New Hampshire home was built in 1979 (US 1980). Source: US Census Bureau, ACS 2020–2024 (table B25035)
| System | People served | Main source | Health violations since 2015 |
|---|---|---|---|
| Manchester Water Works | 123,500 | Surface water | 0 |
| Pennichuck Water Works | 88,853 | Surface water | 0 |
| Concord Water Dept | 44,215 | Surface water | 0 |
| Aquarion Water/Nh | 34,000 | Groundwater | 0 |
| Portsmouth Water Works | 33,000 | Surface water | 0 |
| Keene Water Dept | 30,000 | Surface water | 0 |
Source: EPA SDWIS.
New Hampshire is 4th of 4 (1 = lowest share). Source: EPA SDWIS.
Checked September 2026.
Who to call in New Hampshire, city by city
4 New Hampshire cities on this site and the water utility for each. What to do while you wait is in our water service outage guide.
- Manchester Manchester Water Works
- Nashua Pennichuck Water Works
- Concord City of Concord Water
- Derry Town of Derry Water
Frequently asked questions
Is there a water service outage in New Hampshire right now?
Not on this site: no reports from New Hampshire in the last 24 hours.
How many public water systems are in New Hampshire?
EPA records list 706 active community water systems in New Hampshire, serving about 922,702 people. 94% serve 3,300 people or fewer.
How common are drinking water violations in New Hampshire?
Since 2015, 239 of 706 community water systems in New Hampshire (34%) have had at least one health-based violation, 801 in total.
What is the largest water system in New Hampshire?
Manchester Water Works, which EPA records list as serving about 123,500 people.
Report counts are user-submitted; other figures name their official source. How our data works
Cities in New Hampshire with Water Service Outages Information
Concord
no reports in the last 24 hours · pop. 43,819
City of Concord Water
Manchester
no reports in the last 24 hours · pop. 115,644
Manchester Water Works
Nashua
no reports in the last 24 hours · pop. 91,026
Pennichuck Water Works