Living in Timber Lake, SD: what to set up and who to call
The Timber Lake water system has a clean five-year EPA record, but its latest lead result, 5.0 ppb, was higher than 90% of similar systems’ (the action level is 15). Power in Timber Lake comes from Moreau-Grand Electric Coop, a cooperative utility rather than a private company.
I’m new in town
What to set up in Timber Lake, 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 Timber Lake.
Power comes from Moreau-Grand Electric Coop
Moreau-Grand Electric Coop (Moreau-Grand Electric Coop Inc), a cooperative utility, serves all of Timber Lake.
Start or move service: mge.coop · (605) 865-3511
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Timber Lake water system
The Timber Lake water system supplies almost all of Timber Lake. It draws ground water and serves 499 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 77% of the 15,074 systems serving 101–500 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2024, was 5.0 ppb, below the 15 ppb action level that applied. That’s higher than 90% 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. SD4600411.
2 home internet providers serve Timber Lake
99% of 254 addresses can get 100/20 Mbps; 99% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| CRST Telephone Authority | Fiber | 99% | 250/100 |
| T-Mobile | Fixed wireless | 32% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Timber Lake’s trash rules yet
Pickup rules, the dump and recycling in Timber Lake.
Where your child goes to school
Public school districts and the school path by grade.
Timber Lake is in Timber Lake School District 20-3.
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 Jul 2023; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Timber Lake is in ZIP code 57656
ZIP codes where Timber Lake residents live, with the share of the town in each.
| ZIP | Post office name | Share of Timber Lake | ZIP’s residents in Timber Lake |
|---|---|---|---|
| 57656 | Timber Lake, SD | 100% | 66% |
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 Timber Lake
Who supplies Timber Lake’s drinking water, and has it had violations?
The Timber Lake water system (EPA ID SD4600411). It reported no health-based violations to EPA in the five years to October 2026; 77% of systems its size had none. Its latest lead 90th percentile was 5.0 ppb (Jan–Dec 2024), against a 15 ppb action level.
Who provides electricity in Timber Lake?
Moreau-Grand Electric Coop (Moreau-Grand Electric Coop Inc), a cooperative utility.
What internet providers serve Timber Lake?
CRST Telephone Authority, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Timber Lake?
57656. Census 2020 ZIP Code Tabulation Areas.
What school district is Timber Lake in?
Timber Lake School District 20-3.
How do I register to vote in Timber Lake?
South Dakota has no online registration; you can register in person until 15 days before Election Day or by mail (received 15 days before). Elections here are run by the Dewey County Auditor. Check your registration at vip.sdsos.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.