Photo: Daniel Case · CC BY-SA 3.0Living in Thompson, NY: what to set up and who to call
Most mail in Thompson goes to 12701 (75% of residents), one of 4 ZIP codes in town. Thompson has its own library, Ethelbert B. Crawford Public Library, at 479 Broadway.
I’m new in town
What to set up in Thompson, 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 Thompson.
Power comes from New York State Elec & Gas
New York State Elec & Gas (New York State Elec & Gas Corp), an investor-owned utility, serves all of Thompson. Its homes paid an average of 22.6¢ per kWh in 2025, about $168 a month (its average across New York, for customers on its standard service). New York lets you buy power from another supplier; 6% of New York State Elec & Gas’ home customers do, and New York State Elec & Gas still delivers it.
Start or move service: nyseg.com · (800) 572-1131
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Monticello Village water system
The Monticello Village water system supplies Thompson: about 45% of residents live in its service area. Kiamesha Artesian Spring Water Company serves another 5%. About 42% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws surface water and serves 8,000 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 80% of the 5,012 systems serving 3,301–10,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2023–Dec 2025, was 0.0 ppb, below the 15 ppb action level that applied. The highest in five years was 1.1 ppb. 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. NY5203337.
3 home internet providers serve Thompson
95% of 8,573 addresses can get 100/20 Mbps; 1% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 96% | 1,000/1,000 |
| T-Mobile | Fixed wireless | 38% | 100/20 |
| Verizon | Fixed wireless | 36% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Thompson’s trash rules yet
Pickup rules, the dump and recycling in Thompson.
Where your child goes to school
Public school districts and the school path by grade.
Most of Thompson (98%) is in Monticello Central School District.
DSchool 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 Aug 3, 2026.
Thompson spans 4 ZIP codes
ZIP codes where Thompson residents live, with the share of the town in each.
| ZIP | Post office name | Share of Thompson | ZIP’s residents in Thompson |
|---|---|---|---|
| 12701 | Monticello, NY | 75% | 100% |
| 12775 | Rock Hill, NY | 15% | 99% |
| 12751 | Kiamesha Lake, NY | 7% | 100% |
| 12742 | Harris, NY | 1% | 100% |
A few homes fall in 12790, 12738, 12734, 12784, 12777.
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 Thompson
Who supplies Thompson’s drinking water, and has it had violations?
The Monticello Village water system (EPA ID NY5203337). It reported no health-based violations to EPA in the five years to October 2026; 80% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Thompson?
New York State Elec & Gas (New York State Elec & Gas Corp), an investor-owned utility. Its homes paid about 22.6¢ per kWh in 2025 (EIA).
What internet providers serve Thompson?
Spectrum, T-Mobile, Verizon (FCC, as of December 2025).
What ZIP codes are in Thompson?
12701 (75%), 12775 (15%), 12751 (7%), 12742 (1%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Thompson in?
Monticello Central School District.
How do I register to vote in Thompson?
In New York you can register online until 10 days before Election Day, in person until 10 days before Election Day, or by mail (postmarked 15 days before and received 10 days before). Elections here are run by the Sullivan County Board of Elections. Check your registration at voterlookup.elections.ny.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.