Photo: Quintin Soloviev · CC BY 4.0Living in Greenwich, CT: what to set up and who to call
Greenwich has its own drop-off, Greenwich Transfer Station, on 99 Holly Hill Lane. Voting is local here: the Greenwich Town Clerk registers voters and runs elections, not the county.
I’m new in town
What to set up in Greenwich, 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 Greenwich.
Power comes from Eversource
Eversource (Connecticut Light & Power Co.), an investor-owned utility, serves all of Greenwich. Its homes paid an average of 28.9¢ per kWh in 2025, about $195 a month (its average across Connecticut, for customers on its standard service). Connecticut lets you buy power from another supplier; 17% of Eversource’s home customers do, and Eversource still delivers it.
Start or move service: cl-p.com · (800) 286-2000
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Aquarion Water
Aquarion Water supplies Greenwich: about 91% of residents live in its service area. About 8% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws surface water (EPA lists Norwalk First Taxing District and Aquarion-Ridgefield and Aquarion-Stamford as sellers) and serves 351,756 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 86% of the 84 systems serving 250,001–500,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2026, was 0.0 ppb, below the 15 ppb action level that applied. The highest in five years was 8.0 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. CT0150011.
5 home internet providers serve Greenwich
97% of 18,936 addresses can get 100/20 Mbps; 92% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Optimum | Cable, Fiber | 95% | 8,000/8,000 |
| Verizon | Fiber, Fixed wireless | 75% | 2,300/2,300 |
| Frontier | Fiber, DSL | 25% | 5,000/5,000 |
| AT&T | Fixed wireless | 35% | 100/20 |
| T-Mobile | Fixed wireless | 32% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
Trash and recycling in Greenwich
Pickup days, the drop-off and recycling in Greenwich, from the town’s own site.
Holly Hill Resource Recovery Facility
4 Holly Hill Lane, Greenwich, CT
- Mon7 am–2:30 pm
- Tue7 am–2:30 pm
- Wed7 am–2:30 pm
- Thu7 am–2:30 pm
- Fri7 am–2:30 pm
- Sat7 am–noon
Cost: $25 per year (July 1 to June 30); replacement tag $25
Single-stream recycling
All your recyclables go in one bin, no sorting.
- Aseptic & Tetra Pak cartons
- Bags (brown, colored, NO plastic/fabric handles)
- Beverage & food cartons (juice containers, milk, egg, frozen food, ice cream)
- Blueprints
- Books (paperback, hardcover, phone books)
- Boxboard (cereal, cracker, gift, shoe)
- Cardboard (not waxed)
- Egg cartons
- Envelopes, file folders & index cards
- Gift wrap (non-metallic, NO glitter)
- Junk mail & greeting cards
- Magazines & brochures
- Newspapers & inserts
- Office paper, kraft paper & sticky notes
- Pizza boxes (NO food or liners, oil stains acceptable)
From greenwichct.gov, the town’s official site, checked Oct 21, 2026. 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.
Greenwich is in Greenwich School District.
A−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 Jul 2021; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 30, 2026.
Greenwich spans 5 ZIP codes
ZIP codes where Greenwich residents live, with the share of the town in each.
| ZIP | Post office name | Share of Greenwich | ZIP’s residents in Greenwich |
|---|---|---|---|
| 06830 | Greenwich, CT | 39% | 100% |
| 06831 | Greenwich, CT | 24% | 98% |
| 06878 | Riverside, CT | 13% | 100% |
| 06870 | Old Greenwich, CT | 12% | 100% |
| 06807 | Cos Cob, CT | 11% | 100% |
A few homes fall in 06902. 06836 is P.O. box or single-organization ZIP with no homes.
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.
Train: OpenStreetMap (© OpenStreetMap contributors). ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.
Questions about living in Greenwich
Who supplies Greenwich’s drinking water, and has it had violations?
Aquarion Water (EPA ID CT0150011). It reported no health-based violations to EPA in the five years to October 2026; 86% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan–Dec 2026), against a 15 ppb action level.
Who provides electricity in Greenwich?
Eversource (Connecticut Light & Power Co.), an investor-owned utility. Its homes paid about 28.9¢ per kWh in 2025 (EIA).
What internet providers serve Greenwich?
Optimum, Verizon, Frontier, AT&T, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Greenwich?
06830 (39%), 06831 (24%), 06878 (13%), 06870 (12%), 06807 (11%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Greenwich in?
Greenwich School District.
How do I register to vote in Greenwich?
In Connecticut you can register online until 18 days before Election Day, in person up to and including Election Day, or by mail (postmarked 18 days before). Elections here are run by the Greenwich Town Clerk. Check your registration at portaldir.ct.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: Greenwich’s own website (greenwichct.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 Sep 30, 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.