Photo: John Phelan · CC BY 4.0Living in Windsor, NH: what to set up and who to call
The latest lead test reported by the Wediko School water system, which supplies Windsor, came in at 46.0 ppb (Jul–Dec 2024), above the 15 ppb action level. New voters sign up with the town clerk of Windsor, which runs Windsor’s elections.
I’m new in town
What to set up in Windsor, 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 Windsor.
Power comes from Eversource
Eversource (Public Service Co. of New Hampshire), an investor-owned utility, serves all of Windsor. 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 Wediko School water system
The Wediko School water system supplies Windsor: about 44% of residents live in its service area. About 56% 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 280 people in all.
4 health-based violations reported to EPA in the five years to October 2026: a lead and copper treatment requirement (Lead and Copper Rule) ×3, a bacteria testing requirement (Revised Total Coliform Rule), the latest beginning Jun 2025. 77% of the 15,074 systems serving 101–500 people had none. 1 older violation is still open, since 2023: a lead and copper treatment requirement (Lead and Copper Rule), per EPA’s records.
The latest lead result on file, the 90th percentile of homes sampled in Jul–Dec 2024, was 46.0 ppb, above the 15 ppb action level that applied. The highest in five years was 160.0 ppb. That’s higher than 100% of similar systems’ latest results.
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. NH2552010.
3 home internet providers serve Windsor
100% of 157 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Granite State Communications | Fiber | 100% | 1,000/1,000 |
| Xfinity | Cable | 3% | 2,000/250 |
| T-Mobile | Fixed wireless | 20% | 25/3 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
The nearest public drop-off is 4 miles away
Pickup rules, the dump and recycling in Windsor.
Washington Recycling/Transfer Station
961 South Main Street, Washington, NH, 03280
This isn’t Windsor’s own facility. Whether Windsor residents may use it is the town’s rule: check windsornh.org.
OpenStreetMap, as of Oct 9, 2026. © OpenStreetMap contributors.
Where your child goes to school
Public school districts and the school path by grade.
Windsor is in Windsor School District.
Test scores and every school: see 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.
Windsor is in ZIP code 03244
ZIP codes where Windsor residents live, with the share of the town in each.
| ZIP | Post office name | Share of Windsor | ZIP’s residents in Windsor |
|---|---|---|---|
| 03244 | Hillsborough, NH | 100% | 3% |
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 Windsor
Who supplies Windsor’s drinking water, and has it had violations?
The Wediko School water system (EPA ID NH2552010). It reported 4 health-based violations to EPA in the five years to October 2026: a lead and copper treatment requirement (Lead and Copper Rule) ×3, a bacteria testing requirement (Revised Total Coliform Rule). 77% of systems its size had none. Its latest lead 90th percentile was 46.0 ppb (Jul–Dec 2024), against a 15 ppb action level.
Who provides electricity in Windsor?
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 Windsor?
Granite State Communications, Xfinity, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Windsor?
03244. Census 2020 ZIP Code Tabulation Areas.
What school district is Windsor in?
Windsor School District.
How do I register to vote in Windsor?
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 Windsor. 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.