Photo: Quintin Soloviev · CC BY 4.0Living in Riverhead, NY: what to set up and who to call
Riverhead Water District reported one health-based violation to EPA in the last five years: nitrite, beginning Jul 2023. Power in Riverhead comes from PSEG Long Island, a state utility rather than a private company.
I’m new in town
What to set up in Riverhead, 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 Riverhead.
Power comes from PSEG Long Island
PSEG Long Island (Long Island Power Authority), a state utility, serves all of Riverhead. Its homes paid an average of 26.2¢ per kWh in 2025, about $195 a month (its average across New York, for customers on its standard service). New York lets you buy power from another supplier; 0% of PSEG Long Island’s home customers do, and PSEG Long Island still delivers it.
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Riverhead Water District
Riverhead Water District supplies almost all of Riverhead. It draws ground water and serves 35,000 people in all.
1 health-based violation reported to EPA in the five years to October 2026: nitrite, beginning Jul 2023. 83% of the 3,525 systems serving 10,001–50,000 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2025–Dec 2027, was 2.0 ppb, below the 15 ppb action level that applied. The highest in five years was 2.1 ppb. That’s higher than 65% 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. NY5103705.
3 home internet providers serve Riverhead
90% of 14,595 addresses can get 100/20 Mbps; 56% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Optimum | Cable, Fiber | 89% | 8,000/8,000 |
| Verizon | Fixed wireless, Fiber | 34% | 980/880 |
| T-Mobile | Fixed wireless | 38% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Riverhead’s trash rules yet
Pickup rules, the dump and recycling in Riverhead.
Where your child goes to school
Public school districts and the school path by grade.
Most of Riverhead (91%) is in Riverhead Central School District; parts are in Shoreham-Wading River Central School District (8%).
C−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 Sep 2024; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Riverhead spans 4 ZIP codes
ZIP codes where Riverhead residents live, with the share of the town in each.
| ZIP | Post office name | Share of Riverhead | ZIP’s residents in Riverhead |
|---|---|---|---|
| 11901 | Riverhead, NY | 62% | 72% |
| 11792 | Wading River, NY | 20% | 84% |
| 11933 | Calverton, NY | 16% | 81% |
| 11970 | South Jamesport, NY | 1% | 100% |
A few homes fall in 11949, 11948, 11947, 11931.
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 Riverhead
Who supplies Riverhead’s drinking water, and has it had violations?
Riverhead Water District (EPA ID NY5103705). It reported 1 health-based violation to EPA in the five years to October 2026: nitrite. 83% of systems its size had none. Its latest lead 90th percentile was 2.0 ppb (Jan 2025–Dec 2027), against a 15 ppb action level.
Who provides electricity in Riverhead?
PSEG Long Island (Long Island Power Authority), a state utility. Its homes paid about 26.2¢ per kWh in 2025 (EIA).
What internet providers serve Riverhead?
Optimum, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Riverhead?
11901 (62%), 11792 (20%), 11933 (16%), 11970 (1%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Riverhead in?
Riverhead Central School District. Parts of the city are in Shoreham-Wading River Central School District.
How do I register to vote in Riverhead?
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 Suffolk 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.