Photo: Quintin Soloviev · CC BY 4.0Living in Darien, CT: what to set up and who to call
Elections in Darien are run by Darien itself; register with the Darien Town Clerk. The closest public drop-off to Darien is Yard Waste Site, 4 miles out; the town decides whether residents may use it.
I’m new in town
What to set up in Darien, 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 Darien.
Power comes from Eversource
Eversource (Connecticut Light & Power Co.), an investor-owned utility, serves all of Darien. 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 almost all of Darien. 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 Darien
97% of 6,816 addresses can get 100/20 Mbps; 94% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Optimum | Cable, Fiber | 96% | 8,000/8,000 |
| Frontier | Fiber, DSL | 87% | 7,000/7,000 |
| Verizon | Fixed wireless | 56% | 300/20 |
| T-Mobile | Fixed wireless | 48% | 100/20 |
| AT&T | Fixed wireless | 46% | 25/3 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
Trash and recycling in Darien
Pickup days, the drop-off and recycling in Darien, from the town’s own site.
Darien Recycling & Refuse Center
126 Ledge Road, Darien, CT 06820
We couldn’t find its opening hours.
Cost: $50 per residential permit for residents with garbage collection (two permits included; third permit $50); $150 for residents without garbage collection; valid July 1 to June 30
Single-stream recycling
All your recyclables go in one bin, no sorting.
From darienct.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.
Darien is in Darien 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.
Darien is in ZIP code 06820
ZIP codes where Darien residents live, with the share of the town in each.
| ZIP | Post office name | Share of Darien | ZIP’s residents in Darien |
|---|---|---|---|
| 06820 | Darien, CT | 100% | 100% |
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 Darien
Who supplies Darien’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 Darien?
Eversource (Connecticut Light & Power Co.), an investor-owned utility. Its homes paid about 28.9¢ per kWh in 2025 (EIA).
What internet providers serve Darien?
Optimum, Frontier, Verizon, T-Mobile, AT&T (FCC, as of December 2025).
What ZIP codes are in Darien?
06820. Census 2020 ZIP Code Tabulation Areas.
What school district is Darien in?
Darien School District.
How do I register to vote in Darien?
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 Darien 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: Darien’s own website (darienct.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.