Living in Terre du Lac, MO: what to set up and who to call
Terre du Lac has no town government of its own, so St. Francois County runs its elections and most services, and its children attend West St. Francois County R-IV School District. Bonne Terre Memorial Library, 3.9 miles away, is the closest library to Terre du Lac.
I’m new in town
What to set up in Terre du Lac, 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 Terre du Lac.
Power comes from Union Electric
Union Electric (Union Electric Co - (MO)), an investor-owned utility, serves all of Terre du Lac. Its homes paid an average of 13.3¢ per kWh in 2025, about $137 a month (its average across Missouri).
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Terre Du Lac water system
The Terre Du Lac water system supplies Terre du Lac: about 82% of residents live in its service area. About 18% 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 3,200 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 2023–Dec 2025, was 3.9 ppb, below the 15 ppb action level that applied. That’s higher than 88% 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. MO4036059.
5 home internet providers serve Terre du Lac
99% of 1,351 addresses can get 100/20 Mbps; 0% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 94% | 1,000/1,000 |
| Wisper | Fixed wireless | 92% | 400/30 |
| Verizon | Fixed wireless | 27% | 300/20 |
| T-Mobile | Fixed wireless | 10% | 25/3 |
| Wave Internet Technologies | Fixed wireless | 4% | 100/100 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Terre du Lac’s trash rules yet
Pickup rules, the dump and recycling in Terre du Lac.
Where your child goes to school
Public school districts and the school path by grade.
Most of Terre du Lac (83%) is in West St. Francois County R-IV School District; parts are in North St. Francis County R-I School District (14%) and Potosi R-III School District (2%).
B+School gradeSee 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
Terre du Lac is unincorporated, so St. Francois County is the local government.
Election office: FVAP local election office directory, updated Aug 2021; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Terre du Lac is in ZIP code 63628
ZIP codes where Terre du Lac residents live, with the share of the town in each.
| ZIP | Post office name | Share of Terre du Lac | ZIP’s residents in Terre du Lac |
|---|---|---|---|
| 63628 | Bonne Terre, MO | 100% | 15% |
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 Terre du Lac
Who supplies Terre du Lac’s drinking water, and has it had violations?
The Terre Du Lac water system (EPA ID MO4036059). 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 3.9 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Terre du Lac?
Union Electric (Union Electric Co - (MO)), an investor-owned utility. Its homes paid about 13.3¢ per kWh in 2025 (EIA).
What internet providers serve Terre du Lac?
Spectrum, Wisper, Verizon, T-Mobile, Wave Internet Technologies (FCC, as of December 2025).
What ZIP codes are in Terre du Lac?
63628. Census 2020 ZIP Code Tabulation Areas.
What school district is Terre du Lac in?
West St. Francois County R-IV School District. Parts of the city are in North St. Francis County R-I School District and Potosi R-III School District.
How do I register to vote in Terre du Lac?
In Missouri you can register online until 27 days before Election Day, in person until 27 days before Election Day, or by mail (postmarked 27 days before). Elections here are run by the St. Francois. Check your registration at voteroutreach.sos.mo.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 Nov 18, 2024 (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.