Photo: dwhartwig · CC BY 2.0Living in Mason City, IA: what to set up and who to call
Every home in Mason City is in ZIP code 50401. Children in Mason City attend Mason City Community School District.
I’m new in town
What to set up in Mason City, 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 Mason City.
Power comes from Interstate Power and Light
Interstate Power and Light (Interstate Power and Light Co), an investor-owned utility, serves all of Mason City. 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 Mason City Water Department
Mason City Water Department supplies almost all of Mason City. It draws ground water and serves 27,338 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 83% of the 3,525 systems serving 10,001–50,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2021–Dec 2023, was 2.9 ppb, below the 15 ppb action level that applied. That’s higher than 78% 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. IA1750048.
10 home internet providers serve Mason City
100% of 11,663 addresses can get 100/20 Mbps; 92% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Mediacom Xtream | Cable, Fiber | 99% | 1,000/50 |
| Metronet | Fiber | 91% | 5,120/5,120 |
| Router12 Networks | Fixed wireless, Fiber | 71% | 100/20 |
| CenturyLink | DSL, Fiber | 11% | 10/1 |
| Clear Lake Independent Telephone Company | Fiber | 5% | 1,000/1,000 |
| GigFire | Fixed wireless | 86% | 150/130 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
Trash day in Mason City depends on your street
Pickup days, the drop-off and recycling in Mason City, from the town’s own site.
Your pickup week
- TrashEvery week, on your street’s dayLook up your day on masoncity.net
From masoncity.net, the town’s official site, checked Oct 21, 2026. Rules change: the town’s page is the last word. .
Where your child goes to school
Public school districts and the school path by grade.
Mason City is in Mason City Community School District.
DSchool 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.
Mason City is in ZIP code 50401
ZIP codes where Mason City residents live, with the share of the town in each.
| ZIP | Post office name | Share of Mason City | ZIP’s residents in Mason City |
|---|---|---|---|
| 50401 | Mason City, IA | 100% | 94% |
50402 is P.O. box or single-organization ZIP with no homes.
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 Mason City
Who supplies Mason City’s drinking water, and has it had violations?
Mason City Water Department (EPA ID IA1750048). It reported no health-based violations to EPA in the five years to October 2026; 83% of systems its size had none. Its latest lead 90th percentile was 2.9 ppb (Jan 2021–Dec 2023), against a 15 ppb action level.
Who provides electricity in Mason City?
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 Mason City?
Mediacom Xtream, Metronet, Router12 Networks, CenturyLink, Clear Lake Independent Telephone Company, GigFire (FCC, as of December 2025).
What ZIP codes are in Mason City?
50401. Census 2020 ZIP Code Tabulation Areas.
What school district is Mason City in?
Mason City Community School District.
How do I register to vote in Mason City?
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 Cerro Gordo 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: Mason City’s own website (masoncity.net), read Oct 21, 2026, pickup and drop-off facts extracted and checked against the page they came from.
- 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.