Bennett Farm · Photo: User:Magicpiano · CC BY-SA 4.0Living in Henniker, NH: what to set up and who to call
Voting is local here: the town clerk of Henniker registers voters and runs elections, not the county. Two school districts split the grades in Henniker: John Stark Region School District and Henniker School District.
I’m new in town
What to set up in Henniker, and who provides it. Tap an answer for the details and where they come from.
Power, water and internet
Who to call to start service at a new address in Henniker.
Power comes from Eversource
Eversource (Public Service Co. of New Hampshire), an investor-owned utility, serves all of Henniker. Its homes paid an average of 24.2¢ per kWh in 2025, about $150 a month (its average across New Hampshire, for customers on its standard service). New Hampshire lets you buy power from another supplier; 43% of Eversource’s home customers do, and Eversource still delivers it.
Start or move service: eversource.com · (800) 662-7764
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Cogswell Springs Water Works
Cogswell Springs Water Works supplies Henniker: about 65% of residents live in its service area. About 34% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws ground water and serves 3,000 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 7,966 systems serving 1,001–3,300 people.
The latest lead result on file, the 90th percentile of homes sampled in Jul–Dec 1993, was 19.0 ppb, above the 15 ppb action level that applied. It’s from 1993: EPA has no newer result for this system.
The system’s full record: EPA ECHO report
EPA SDWIS via Envirofacts (violations pulled Oct 9, 2026) and ECHO (lead samples, 2026Q3); service area: EPA Community Water System Service Area Boundaries v3.0. Violations are counted by the start of their compliance period. NH1121010.
5 home internet providers serve Henniker
97% of 1,675 addresses can get 100/20 Mbps; 90% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| TDS Telecom | Fiber, DSL | 97% | 1,000/1,000 |
| Xfinity | Cable | 78% | 2,000/250 |
| T-Mobile | Fixed wireless | 51% | 100/20 |
| AT&T | Fixed wireless | 18% | 25/3 |
| Verizon | Fixed wireless | 3% | 25/6 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Henniker’s trash rules yet
Pickup rules, the dump and recycling in Henniker.
Where your child goes to school
Public school districts and the school path by grade.
Henniker is in two districts that split the grades: John Stark Region School District and Henniker School District.
B−School gradeSee Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
Town hall and registering to vote
Who to call, and how to register.
Election office: FVAP local election office directory, updated Sep 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 19, 2024.
Henniker is in ZIP code 03242
ZIP codes where Henniker residents live, with the share of the town in each.
| ZIP | Post office name | Share of Henniker | ZIP’s residents in Henniker |
|---|---|---|---|
| 03242 | Henniker, NH | 100% | 100% |
Census 2020 ZIP Code Tabulation Areas, by census block; post office names: GeoNames (CC BY 4.0). ZIPs created since 2020 are missing.
Getting around, the ER and the library
One line each; the subject pages have the rest.
ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.
Questions about living in Henniker
Who supplies Henniker’s drinking water, and has it had violations?
Cogswell Springs Water Works (EPA ID NH1121010). It reported no health-based violations to EPA in the five years to October 2026; 78% of systems its size had none. Its latest lead 90th percentile was 19.0 ppb (Jul–Dec 1993), against a 15 ppb action level.
Who provides electricity in Henniker?
Eversource (Public Service Co. of New Hampshire), an investor-owned utility. Its homes paid about 24.2¢ per kWh in 2025 (EIA).
What internet providers serve Henniker?
TDS Telecom, Xfinity, T-Mobile, AT&T, Verizon (FCC, as of December 2025).
What ZIP codes are in Henniker?
03242. Census 2020 ZIP Code Tabulation Areas.
What school district is Henniker in?
John Stark Region School District and Henniker School District.
How do I register to vote in Henniker?
New Hampshire has no online registration; you can register in person up to and including Election Day or by mail only in special circumstances (received 13 days before). Elections here are run by the Town Clerk of Henniker. Check your registration at app.sos.nh.gov.
Sources & dates
Every answer above names its source. Here they are with their dates.
- Water: EPA SDWIS (Envirofacts, pulled Oct 9, 2026), ECHO SDWA 2026Q3, EPA CWS Service Area Boundaries v3.0.
- Power: HIFLD Electric Retail Service Territories (map Aug 2023); EIA-861 final 2025.
- Trash: OpenStreetMap, Geofabrik extract of Oct 9, 2026. © OpenStreetMap contributors (ODbL).
- ZIP codes: Census 2020 ZCTA relationship files; GeoNames postal codes (CC BY 4.0).
- Schools: NCES Common Core of Data, 2024–25.
- Registration: vote.gov, updated Nov 19, 2024 (read Oct 10, 2026). Official sites and area codes: Wikidata.
- Election office: FVAP local election office directory (fetched Oct 10, 2026; each record dated), EAC EAVS 2024 jurisdictions; registration and lookup links from vote.gov’s state data, checked Oct 10, 2026.
- Internet: FCC National Broadband Map, as of December 2025.