Living in Dennison, MN: what to set up and who to call
The Dennison water system reported 4 health-based violations to EPA in the last five years: radioactivity (gross alpha, excluding radon and uranium) ×4. 77% of systems its size reported none. For a library card, the closest branch is Northfield Public Library, 7.2 miles out.
I’m new in town
What to set up in Dennison, 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 Dennison.
Power comes from Xcel Energy
Xcel Energy (Northern States Power Co. (Minnesota)), an investor-owned utility, serves all of Dennison. Its homes paid an average of 17.1¢ per kWh in 2025, about $105 a month (its average across Minnesota).
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Dennison water system
The Dennison water system supplies Dennison: about 96% of residents live in its service area. About 4% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws ground water and serves 220 people in all.
4 health-based violations reported to EPA in the five years to October 2026: radioactivity (gross alpha, excluding radon and uranium) ×4, the latest beginning Apr 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 2021–Dec 2023, was 2.0 ppb, below the 15 ppb action level that applied. That’s higher than 70% 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. Violations are counted by the start of their compliance period. MN1250021.
7 home internet providers serve Dennison
100% of 109 addresses can get 100/20 Mbps; 75% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| CenturyLink | DSL | 83% | 60/5 |
| Metronet | Fiber | 71% | 5,120/5,120 |
| GigFire | Fixed wireless | 100% | 150/130 |
| Midco | Fixed wireless | 100% | 100/20 |
| Verizon | Fixed wireless | 83% | 300/20 |
| T-Mobile | Fixed wireless | 67% | 25/3 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Dennison’s trash rules yet
Pickup rules, the dump and recycling in Dennison.
Where your child goes to school
Public school districts and the school path by grade.
Most of Dennison (51%) is in Northfield Public School District; parts are in Kenyon-Wanamingo School District (49%).
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 Jun 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Dennison is in ZIP code 55018
ZIP codes where Dennison residents live, with the share of the town in each.
| ZIP | Post office name | Share of Dennison | ZIP’s residents in Dennison |
|---|---|---|---|
| 55018 | Dennison, MN | 100% | 23% |
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 Dennison
Who supplies Dennison’s drinking water, and has it had violations?
The Dennison water system (EPA ID MN1250021). It reported 4 health-based violations to EPA in the five years to October 2026: radioactivity (gross alpha, excluding radon and uranium) ×4. 77% 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 Dennison?
Xcel Energy (Northern States Power Co. (Minnesota)), an investor-owned utility. Its homes paid about 17.1¢ per kWh in 2025 (EIA).
What internet providers serve Dennison?
CenturyLink, Metronet, GigFire, Midco, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Dennison?
55018. Census 2020 ZIP Code Tabulation Areas.
What school district is Dennison in?
Northfield Public School District. Parts of the city are in Kenyon-Wanamingo School District.
How do I register to vote in Dennison?
In Minnesota you can register online until 21 days before Election Day, in person up to and including Election Day, or by mail (received 21 days before). Elections here are run by the Goodhue County Government Center. Check your registration at mnvotes.sos.state.mn.us.
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.