Living in Clarence, MO: what to set up and who to call
Every home in Clarence is in ZIP code 63437. For home internet, most of Clarence can choose between Mark Twain Communications Company and Brightspeed.
I’m new in town
What to set up in Clarence, 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 Clarence.
Power comes from Union Electric
Union Electric (Union Electric Co - (MO)), an investor-owned utility, serves all of Clarence. 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 Clarence PWS
Clarence PWS supplies Clarence: about 64% of residents live in its service area. Macon Co Pwsd 1 serves another 16%. About 23% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It buys treated surface water (EPA lists Macon Co Pwsd 1 as seller) and serves 800 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 5,327 systems serving 501–1,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2022–Dec 2024, was 3.1 ppb, below the 15 ppb action level that applied. The highest in five years was 3.6 ppb. That’s higher than 84% 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. MO2010165.
5 home internet providers serve Clarence
100% of 433 addresses can get 100/20 Mbps; 86% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Mark Twain Communications Company | Fixed wireless, Fiber | 100% | 300/20 |
| Brightspeed | DSL | 84% | 100/10 |
| Chariton Valley Communication | Fiber | 83% | 1,000/1,000 |
| T-Mobile | Fixed wireless | 80% | 100/20 |
| Verizon | Fixed wireless | 3% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Clarence’s trash rules yet
Pickup rules, the dump and recycling in Clarence.
Where your child goes to school
Public school districts and the school path by grade.
Clarence is in Shelby County R-IV School District.
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 Sep 2015; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Clarence is in ZIP code 63437
ZIP codes where Clarence residents live, with the share of the town in each.
| ZIP | Post office name | Share of Clarence | ZIP’s residents in Clarence |
|---|---|---|---|
| 63437 | Clarence, MO | 100% | 50% |
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 Clarence
Who supplies Clarence’s drinking water, and has it had violations?
Clarence PWS (EPA ID MO2010165). 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 3.1 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in Clarence?
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 Clarence?
Mark Twain Communications Company, Brightspeed, Chariton Valley Communication, T-Mobile, Verizon (FCC, as of December 2025).
What ZIP codes are in Clarence?
63437. Census 2020 ZIP Code Tabulation Areas.
What school district is Clarence in?
Shelby County R-IV School District.
How do I register to vote in Clarence?
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 Shelby. 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.