Photo: Daniel Case · CC BY-SA 3.0Living in Denning, NY: what to set up and who to call
There is no curbside pickup in Denning: residents take trash to Denning Transfer Station. The ER is a drive from Denning: the closest is Margaretville Memorial Hospital, 15.7 miles away.
I’m new in town
What to set up in Denning, 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 Denning.
Power comes from Central Hudson Gas & Elec
Central Hudson Gas & Elec (Central Hudson Gas & Elec Corp), an investor-owned utility, serves all of Denning. Its homes paid an average of 27.7¢ per kWh in 2025, about $193 a month (its average across New York, for customers on its standard service). New York lets you buy power from another supplier; 9% of Central Hudson Gas & Elec’s home customers do, and Central Hudson Gas & Elec still delivers it.
Start or move service: centralhudson.com · (845) 452-2700
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Frost Valley Ymca water system
The Frost Valley Ymca water system supplies Denning: about 0% of residents live in its service area. About 100% 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 688 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–Dec 2025, was 1.1 ppb, below the 15 ppb action level that applied. The highest in five years was 93.5 ppb. That’s higher than 55% 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. NY5507411.
1 home internet providers serve Denning
65% of 513 addresses can get 100/20 Mbps; 0% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable | 64% | 1,000/1,000 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
No curbside pickup in Denning: trash goes to the transfer station
Pickup days, the drop-off and recycling in Denning, from the town’s own site.
Denning Transfer Station
We couldn’t find its opening hours.
Cost: $25 per year (valid Jan 1 – Dec 31, 2026)
Accepted at the curb
- Clean glass bottles
- Cans
- Plastic containers
- Aluminum items
- Magazines
- Clean unsoiled paper
From denningny.gov, the town’s official site, checked Oct 21, 2026; pages dated 2024-03-05T18:14:26+00:00, 2026-05-07T14:49:35+00:00. Rules change: the town’s page is the last word. .
Where your child goes to school
Public school districts and the school path by grade.
Most of Denning (97%) is in Tri-Valley Central School District; parts are in Livingston Manor Central School District (2%).
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 Aug 3, 2026.
Denning spans 4 ZIP codes
ZIP codes where Denning residents live, with the share of the town in each.
| ZIP | Post office name | Share of Denning | ZIP’s residents in Denning |
|---|---|---|---|
| 12740 | Grahamsville, NY | 49% | 14% |
| 12725 | Claryville, NY | 38% | 64% |
| 12410 | Big Indian, NY | 7% | 9% |
| 12458 | Napanoch, NY | 6% | 1% |
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 Denning
Who supplies Denning’s drinking water, and has it had violations?
The Frost Valley Ymca water system (EPA ID NY5507411). 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 1.1 ppb (Jan–Dec 2025), against a 15 ppb action level.
Who provides electricity in Denning?
Central Hudson Gas & Elec (Central Hudson Gas & Elec Corp), an investor-owned utility. Its homes paid about 27.7¢ per kWh in 2025 (EIA).
What internet providers serve Denning?
Spectrum (FCC, as of December 2025).
What ZIP codes are in Denning?
12740 (49%), 12725 (38%), 12410 (7%), 12458 (6%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Denning in?
Tri-Valley Central School District. Parts of the city are in Livingston Manor Central School District.
How do I register to vote in Denning?
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 Ulster 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: Denning’s own website (denningny.gov), read Oct 21, 2026, pickup and drop-off facts extracted and checked against the page they came from.
- 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.