Gerome Clark House · Photo: Dan Breyfogle · CC BY-SA 3.0Living in Arnolds Park, IA: what to set up and who to call
Most mail in Arnolds Park goes to 51331 (95% of residents), one of 2 ZIP codes in town. Almost every address in Arnolds Park can get fiber (98%, by the FCC’s map).
I’m new in town
What to set up in Arnolds Park, 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 Arnolds Park.
Power comes from Interstate Power and Light
Interstate Power and Light (Interstate Power and Light Co), an investor-owned utility, serves all of Arnolds Park. Its homes paid an average of 17.8¢ per kWh in 2025, about $131 a month (its average across Iowa).
Start or move service: alliantenergy.com · (319) 786-4411
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Arnolds Park Water Department
Arnolds Park Water Department supplies Arnolds Park: about 60% of residents live in its service area. West Okoboji serves another 29%. About 12% 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 Central Water System as seller) and serves 1,113 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 2021–Dec 2023, was 2.0 ppb, below the 15 ppb action level that applied. That’s higher than 69% 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. IA3003067.
9 home internet providers serve Arnolds Park
100% of 1,521 addresses can get 100/20 Mbps; 98% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Mediacom Xtream | Cable, Fiber | 100% | 2,000/1,000 |
| Premier Communications | Fiber | 87% | 1,000/1,000 |
| CenturyLink | DSL | 39% | 40/3 |
| GigFire | Fixed wireless | 72% | 150/130 |
| AT&T | Fixed wireless | 50% | 100/20 |
| Nextlink | Fixed wireless | 48% | 500/100 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Arnolds Park’s trash rules yet
Pickup rules, the dump and recycling in Arnolds Park.
Where your child goes to school
Public school districts and the school path by grade.
Arnolds Park is in Okoboji Community School District.
A−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 Nov 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Arnolds Park spans 2 ZIP codes
ZIP codes where Arnolds Park residents live, with the share of the town in each.
| ZIP | Post office name | Share of Arnolds Park | ZIP’s residents in Arnolds Park |
|---|---|---|---|
| 51331 | Arnolds Park, IA | 95% | 96% |
| 51351 | Milford, IA | 5% | 1% |
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 Arnolds Park
Who supplies Arnolds Park’s drinking water, and has it had violations?
Arnolds Park Water Department (EPA ID IA3003067). 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 2021–Dec 2023), against a 15 ppb action level.
Who provides electricity in Arnolds Park?
Interstate Power and Light (Interstate Power and Light Co), an investor-owned utility. Its homes paid about 17.8¢ per kWh in 2025 (EIA).
What internet providers serve Arnolds Park?
Mediacom Xtream, Premier Communications, CenturyLink, GigFire, AT&T, Nextlink (FCC, as of December 2025).
What ZIP codes are in Arnolds Park?
51331 (95%), 51351 (5%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Arnolds Park in?
Okoboji Community School District.
How do I register to vote in Arnolds Park?
In Iowa you can register online until 15 days before Election Day, in person up to and including Election Day, or by mail (postmarked 15 days before). Elections here are run by the Dickinson County Auditor. Check your registration at sos.iowa.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.