Municipal Department
Manchester Water Works
Service area: Manchester and surrounding franchise communities
Population: 123,500
State utility hub
Water utilities serving New Hampshire
Browse the indexed community water systems in this state. Each profile brings the provider’s payment routes and household protection policies into a single, practical guide.
9 systems indexed2026 directory
33
Private Investor-Owned Utility
Aquarion Water Company of New Hampshire
Service area: Aquarion Water Company of New Hampshire service areas
Population: 34,000 people (EPA SDWA queue estimate for NH1051010)
Municipal Department
City of Portsmouth Water and Sewer Division
Service area: Portsmouth
Population: 33,000 people (EPA SDWA queue estimate for NH1951010)
Municipal Department
City of Keene Water Department
Service area: Keene
Population: 30,000 people (EPA SDWA queue estimate for NH1241010)
Public Water Authority
Merrimack Village District
Service area: Merrimack
Population: 25,500 people (EPA SDWIS 2026Q2 estimate for NH1531010)
Municipal Department
City of Rochester Water Department
Service area: Rochester
Population: 25,000 people (EPA SDWIS 2026Q2 estimate for NH2001010)
Municipal Department
Town of Salem Water Department
Service area: Salem
Population: 21,000 people (EPA SDWIS 2026Q2 estimate for NH2051010)
Private Investor-Owned Utility
PENNICHUCK WATER WORKS
Service area: NASHUA
Population: 88853 people (EPA SDWIS 2026Q2 active CWS estimate for NH1621010)
Municipal Department
CONCORD WATER DEPT
Service area: CONCORD
Population: 44215 people (EPA SDWIS 2026Q2 active CWS estimate for NH0501010)
New Hampshire directory notes
How to compare water utilities in New Hampshire
This state hub brings together 9 indexed community water systems, from city departments and public authorities to investor-owned systems and smaller regional providers. A service area may cross municipal boundaries, so use the provider name and service address on your bill when choosing a profile.
The most important distinction is between a directory listing and an official account channel. Water Ledger provides a structured starting point; the utility’s own payment portal, published rate schedule, customer-service office, and mailed notice control your account. Compare the payment route, billing frequency, emergency number, and customer-protection notes before relying on a page for a time-sensitive decision.
If you are helping a household with a high bill, leak, or delinquency notice, open the utility profile and review the payment, shut-off, and leak-adjustment guides together. Keep the bill, account number, confirmation receipts, repair records, and notice dates available when speaking with the provider.