Photo: Gargiulo · Public domainLiving in Three Oaks, MI: what to set up and who to call
The Three Oaks water system has a clean five-year EPA record, but its latest lead result, 7.8 ppb, was higher than 96% of similar systems’ (the action level is 15). Power in Three Oaks comes from Midwest Energy Cooperative, a cooperative utility rather than a private company.
I’m new in town
What to set up in Three Oaks, 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 Three Oaks.
Power comes from Midwest Energy Cooperative
Midwest Energy Cooperative (Midwest Energy Cooperative - (MI)), a cooperative utility, serves all of Three Oaks. Its homes paid an average of 19.5¢ per kWh in 2025, about $189 a month (its average across Michigan).
Start or move service: www.teammidwest.com · (800) 492-5989
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Three Oaks water system
The Three Oaks water system supplies almost all of Three Oaks. It draws ground water and serves 1,622 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 7,966 systems serving 1,001–3,300 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2022–Dec 2024, was 7.8 ppb, below the 15 ppb action level that applied. That’s higher than 96% 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. MI0006600.
6 home internet providers serve Three Oaks
99% of 792 addresses can get 100/20 Mbps; 78% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 97% | 1,200/35 |
| Surf Internet | Fiber, Fixed wireless | 80% | 8,000/8,000 |
| AT&T | DSL, Fixed wireless | 18% | 10/1 |
| Mercury Fiber | Fixed wireless | 80% | 150/20 |
| T-Mobile | Fixed wireless | 80% | 100/20 |
| Verizon | Fixed wireless | 80% | 25/6 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Three Oaks’ trash rules yet
Pickup rules, the dump and recycling in Three Oaks.
Where your child goes to school
Public school districts and the school path by grade.
Three Oaks is in River Valley School District.
B+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 Nov 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 12, 2025.
Three Oaks is in ZIP code 49128
ZIP codes where Three Oaks residents live, with the share of the town in each.
| ZIP | Post office name | Share of Three Oaks | ZIP’s residents in Three Oaks |
|---|---|---|---|
| 49128 | Three Oaks, MI | 100% | 40% |
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 Three Oaks
Who supplies Three Oaks’ drinking water, and has it had violations?
The Three Oaks water system (EPA ID MI0006600). 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 7.8 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in Three Oaks?
Midwest Energy Cooperative (Midwest Energy Cooperative - (MI)), a cooperative utility. Its homes paid about 19.5¢ per kWh in 2025 (EIA).
What internet providers serve Three Oaks?
Xfinity, Surf Internet, AT&T, Mercury Fiber, T-Mobile, Verizon (FCC, as of December 2025).
What ZIP codes are in Three Oaks?
49128. Census 2020 ZIP Code Tabulation Areas.
What school district is Three Oaks in?
River Valley School District.
How do I register to vote in Three Oaks?
In Michigan you can register online until 15 days before Election Day, in person up to and including Election Day, or by mail (postmarked 15 days before). Elections here are run by the Three Oaks Township Clerk. Check your registration at mvic.sos.state.mi.us.
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 Sep 12, 2025 (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.