Photo: Roastedbeanz1 · CC BY 4.0Living in Holts Summit, MO: what to set up and who to call
Every home in Holts Summit is in ZIP code 65043. For emergencies, Holts Summit is closest to SSM Health St. Mary's Hospital - Jefferson City, 10.3 miles away.
I’m new in town
What to set up in Holts Summit, 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 Holts Summit.
Power comes from Union Electric
Union Electric (Union Electric Co - (MO)), an investor-owned utility, serves all of Holts Summit. 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 Callaway County Pwsd 1
Callaway County Pwsd 1 supplies almost all of Holts Summit. It draws ground water and serves 9,840 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 80% of the 5,012 systems serving 3,301–10,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2022–Dec 2024, was 4.1 ppb, below the 15 ppb action level that applied. That’s higher than 89% 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. MO3024084.
9 home internet providers serve Holts Summit
100% of 1,827 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Callabyte | Fiber | 100% | 1,000/1,000 |
| Mediacom Xtream | Cable, Fiber | 91% | 1,000/50 |
| Brightspeed | DSL, Fiber, Fixed wireless | 30% | 100/10 |
| Stimulus Technologies | Fixed wireless | 100% | 100/50 |
| Verizon | Fixed wireless | 41% | 300/20 |
| T-Mobile | Fixed wireless | 15% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Holts Summit’s trash rules yet
Pickup rules, the dump and recycling in Holts Summit.
Where your child goes to school
Public school districts and the school path by grade.
Most of Holts Summit (95%) is in Jefferson City Public Schools; parts are in New Bloomfield R-III School District (5%).
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 Aug 2019; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Holts Summit is in ZIP code 65043
ZIP codes where Holts Summit residents live, with the share of the town in each.
| ZIP | Post office name | Share of Holts Summit | ZIP’s residents in Holts Summit |
|---|---|---|---|
| 65043 | Holts Summit, MO | 100% | 44% |
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 Holts Summit
Who supplies Holts Summit’s drinking water, and has it had violations?
Callaway County Pwsd 1 (EPA ID MO3024084). It reported no health-based violations to EPA in the five years to October 2026; 80% of systems its size had none. Its latest lead 90th percentile was 4.1 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in Holts Summit?
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 Holts Summit?
Callabyte, Mediacom Xtream, Brightspeed, Stimulus Technologies, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Holts Summit?
65043. Census 2020 ZIP Code Tabulation Areas.
What school district is Holts Summit in?
Jefferson City Public Schools. Parts of the city are in New Bloomfield R-III School District.
How do I register to vote in Holts Summit?
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 Callaway. 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.