Living in Underhill Flats, VT: what to set up and who to call
Underhill Flats has no town government of its own, so Chittenden County runs its elections and most services, and its children attend Mount Mansfield Unified Union School District 401. Tap water in Underhill Flats comes from Jericho Underhill Water, which has a clean five-year EPA record (about 22% of systems its size had a health-based violation) and a latest lead result below detection.
I’m new in town
What to set up in Underhill Flats, 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 Underhill Flats.
Power comes from Green Mountain Power
Green Mountain Power (Green Mountain Power Corp), an investor-owned utility, serves all of Underhill Flats. Its homes paid an average of 23.3¢ per kWh in 2025, about $140 a month (its average across Vermont).
Start or move service: greenmountainpower.com · (888) 836-4672
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Jericho Underhill Water
Jericho Underhill Water supplies almost all of Underhill Flats. It draws ground water and serves 825 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 5,327 systems serving 501–1,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2022–Dec 2024, was 0.0 ppb, below the 15 ppb action level that applied. Results below detection are reported as 0, so 0 doesn’t mean no lead at any tap.
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. VT0005096.
4 home internet providers serve Underhill Flats
100% of 238 addresses can get 100/20 Mbps; 0% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 100% | 1,200/35 |
| Consolidated Communications | DSL | 88% | 80/20 |
| VTel Wireless | Fixed wireless | 49% | 25/3 |
| T-Mobile | Fixed wireless | 8% | 25/3 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Underhill Flats’ trash rules yet
Pickup rules, the dump and recycling in Underhill Flats.
Where your child goes to school
Public school districts and the school path by grade.
Underhill Flats is in two districts that split the grades: Mount Mansfield Unified Union School District 401 and Mount Mansfield Unified Union School District (Supervisory).
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.
No town hall: the county runs things
Underhill Flats is unincorporated, so Chittenden County is the local government.
Election office: FVAP local election office directory, updated Nov 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Underhill Flats spans 2 ZIP codes
ZIP codes where Underhill Flats residents live, with the share of the town in each.
| ZIP | Post office name | Share of Underhill Flats | ZIP’s residents in Underhill Flats |
|---|---|---|---|
| 05465 | Jericho, VT | 58% | 7% |
| 05489 | Underhill, VT | 42% | 8% |
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 Underhill Flats
Who supplies Underhill Flats’ drinking water, and has it had violations?
Jericho Underhill Water (EPA ID VT0005096). 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 0.0 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in Underhill Flats?
Green Mountain Power (Green Mountain Power Corp), an investor-owned utility. Its homes paid about 23.3¢ per kWh in 2025 (EIA).
What internet providers serve Underhill Flats?
Xfinity, Consolidated Communications, VTel Wireless, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Underhill Flats?
05465 (58%), 05489 (42%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Underhill Flats in?
Mount Mansfield Unified Union School District 401 and Mount Mansfield Unified Union School District (Supervisory).
How do I register to vote in Underhill Flats?
In Vermont you can register online up to and including Election Day, in person up to and including Election Day, or by mail (received by Election Day). Elections here are run by the Jericho Town Clerk. Check your registration at mvp.vermont.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 Aug 3, 2026 (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.