Living in Mercer, MO: what to set up and who to call
Mercer PWS reported 7 health-based violations to EPA in the last five years: disinfection byproducts (TTHM) ×7. 77% of systems its size reported none. Power in Mercer comes from Grundy Electric Coop, a cooperative utility rather than a private company.
I’m new in town
What to set up in Mercer, 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 Mercer.
Power comes from Grundy Electric Coop
Grundy Electric Coop (Grundy Electric Coop, Inc), a cooperative utility, serves all of Mercer.
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Mercer PWS
Mercer PWS supplies almost all of Mercer. It buys treated ground water (EPA lists Princeton PWS and Mercer County Pwsd 1 as sellers) and serves 318 people in all.
7 health-based violations reported to EPA in the five years to October 2026: disinfection byproducts (TTHM) ×7, the latest beginning Jan 2026. 77% of the 15,074 systems serving 101–500 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2023–Dec 2025, was 13.7 ppb, below the 15 ppb action level that applied. That’s higher than 98% 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. MO2010515.
5 home internet providers serve Mercer
100% of 160 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Grand River Mutual Telephone | Fiber | 100% | 1,000/1,000 |
| Verizon | Fixed wireless | 93% | 300/20 |
| Lockridge Networks | Fixed wireless | 71% | 25/3 |
| T-Mobile | Fixed wireless | 16% | 25/3 |
| Mid-States Services | Fixed wireless | 4% | 25/5 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Mercer’s trash rules yet
Pickup rules, the dump and recycling in Mercer.
Where your child goes to school
Public school districts and the school path by grade.
Mercer is in North Mercer County R-III 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 Aug 2019; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Mercer is in ZIP code 64661
ZIP codes where Mercer residents live, with the share of the town in each.
| ZIP | Post office name | Share of Mercer | ZIP’s residents in Mercer |
|---|---|---|---|
| 64661 | Mercer, MO | 100% | 38% |
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 Mercer
Who supplies Mercer’s drinking water, and has it had violations?
Mercer PWS (EPA ID MO2010515). It reported 7 health-based violations to EPA in the five years to October 2026: disinfection byproducts (TTHM) ×7. 77% of systems its size had none. Its latest lead 90th percentile was 13.7 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Mercer?
Grundy Electric Coop (Grundy Electric Coop, Inc), a cooperative utility.
What internet providers serve Mercer?
Grand River Mutual Telephone, Verizon, Lockridge Networks, T-Mobile, Mid-States Services (FCC, as of December 2025).
What ZIP codes are in Mercer?
64661. Census 2020 ZIP Code Tabulation Areas.
What school district is Mercer in?
North Mercer County R-III School District.
How do I register to vote in Mercer?
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 Mercer. 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.