Living in Hannawa Falls, NY: what to set up and who to call
Hannawa Falls has no town government of its own, so St. Lawrence County runs its elections and most services, and its children attend Potsdam Central School District. For a library card, the closest branch is Hepburn Library, 3.7 miles out.
I’m new in town
What to set up in Hannawa Falls, 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 Hannawa Falls.
Power comes from National Grid
National Grid (Niagara Mohawk Power Corp.), an investor-owned utility, serves all of Hannawa Falls. Its homes paid an average of 19.9¢ per kWh in 2025, about $130 a month (its average across New York, for customers on its standard service). New York lets you buy power from another supplier; 6% of National Grid’s home customers do, and National Grid still delivers it.
Start or move service: www1.nationalgridus.com · (315) 474-1511
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Hannawa Building Corp.
Hannawa Building Corp. supplies Hannawa Falls: about 5% of residents live in its service area. About 90% 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 70 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 11,392 systems serving <=100 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2024, was 3.4 ppb, below the 15 ppb action level that applied. That’s higher than 83% 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 (EPA’s estimate). Violations are counted by the start of their compliance period. NY4404402.
4 home internet providers serve Hannawa Falls
97% of 534 addresses can get 100/20 Mbps; 32% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable | 98% | 1,000/1,000 |
| SLICFiber | Fiber | 30% | 1,000/1,000 |
| Verizon | Fixed wireless | 41% | 300/20 |
| T-Mobile | Fixed wireless | 23% | 25/3 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Hannawa Falls’ trash rules yet
Pickup rules, the dump and recycling in Hannawa Falls.
Where your child goes to school
Public school districts and the school path by grade.
Most of Hannawa Falls (71%) is in Potsdam Central School District; parts are in Colton-Pierrepont Central School District (20%) and Parishville-Hopkinton Central School District (10%).
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.
No town hall: the county runs things
Hannawa Falls is unincorporated, so St. Lawrence County is the local government.
Election office: FVAP local election office directory, updated Sep 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Hannawa Falls spans 3 ZIP codes
ZIP codes where Hannawa Falls residents live, with the share of the town in each.
| ZIP | Post office name | Share of Hannawa Falls | ZIP’s residents in Hannawa Falls |
|---|---|---|---|
| 13676 | Potsdam, NY | 83% | 6% |
| 13647 | Hannawa Falls, NY | 12% | 100% |
| 13625 | Colton, NY | 5% | 3% |
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 Hannawa Falls
Who supplies Hannawa Falls’ drinking water, and has it had violations?
Hannawa Building Corp. (EPA ID NY4404402). 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 3.4 ppb (Jan–Dec 2024), against a 15 ppb action level.
Who provides electricity in Hannawa Falls?
National Grid (Niagara Mohawk Power Corp.), an investor-owned utility. Its homes paid about 19.9¢ per kWh in 2025 (EIA).
What internet providers serve Hannawa Falls?
Spectrum, SLICFiber, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Hannawa Falls?
13676 (83%), 13647 (12%), 13625 (5%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Hannawa Falls in?
Potsdam Central School District. Parts of the city are in Colton-Pierrepont Central School District and Parishville-Hopkinton Central School District.
How do I register to vote in Hannawa Falls?
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 St. Lawrence 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.