Photo: Paltron · CC BY-SA 4.0Living in Mammoth Spring, AR: what to set up and who to call
All of Mammoth Spring gets its mail under one ZIP code, 72554. The nearest emergency room is Baxter Health Fulton County Hospital, 16.8 miles away.
I’m new in town
What to set up in Mammoth Spring, 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 Mammoth Spring.
Power comes from Entergy Arkansas
Entergy Arkansas (Entergy Arkansas LLC), an investor-owned utility, serves all of Mammoth Spring. Its homes paid an average of 13.4¢ per kWh in 2025, about $145 a month (its average across Arkansas).
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Mammoth Spring Waterworks
Mammoth Spring Waterworks supplies almost all of Mammoth Spring. It draws ground water and serves 1,777 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 2000–Dec 2002, was 2.0 ppb, below the 15 ppb action level that applied. It’s from 2002: EPA has no newer result for this system.
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. AR0000206.
7 home internet providers serve Mammoth Spring
98% of 525 addresses can get 100/20 Mbps; 17% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Fidelity | Cable | 93% | 1,000/50 |
| Brightspeed | DSL, Fixed wireless | 56% | 40/3 |
| GigFire | Fiber | 10% | 1,000/1,000 |
| NEXT, Powered by NAEC | Fiber | 6% | 1,000/1,000 |
| Verizon | Fixed wireless | 84% | 300/20 |
| T-Mobile | Fixed wireless | 21% | 25/3 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Mammoth Spring’s trash rules yet
Pickup rules, the dump and recycling in Mammoth Spring.
Where your child goes to school
Public school districts and the school path by grade.
Mammoth Spring is in Mammoth Spring Schools.
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 2021; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Mammoth Spring is in ZIP code 72554
ZIP codes where Mammoth Spring residents live, with the share of the town in each.
| ZIP | Post office name | Share of Mammoth Spring | ZIP’s residents in Mammoth Spring |
|---|---|---|---|
| 72554 | Mammoth Spring, AR | 100% | 34% |
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 Mammoth Spring
Who supplies Mammoth Spring’s drinking water, and has it had violations?
Mammoth Spring Waterworks (EPA ID AR0000206). 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 2.0 ppb (Jan 2000–Dec 2002), against a 15 ppb action level.
Who provides electricity in Mammoth Spring?
Entergy Arkansas (Entergy Arkansas LLC), an investor-owned utility. Its homes paid about 13.4¢ per kWh in 2025 (EIA).
What internet providers serve Mammoth Spring?
Fidelity, Brightspeed, GigFire, NEXT, Powered by NAEC, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Mammoth Spring?
72554. Census 2020 ZIP Code Tabulation Areas.
What school district is Mammoth Spring in?
Mammoth Spring Schools.
How do I register to vote in Mammoth Spring?
Arkansas has no online registration; you can register in person until 30 days before Election Day or by mail (postmarked 30 days before). Elections here are run by the Fulton County Clerk. Check your registration at voterview.ar-nova.org.
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.