Photo: Adam Moss · CC BY-SA 2.0Living in Thomson, IL: what to set up and who to call
Every home in Thomson is in ZIP code 61285. York Township Public Library, at 1005 West Main Street, is the library in town.
I’m new in town
What to set up in Thomson, 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 Thomson.
Power comes from Interstate Power and Light
Interstate Power and Light (Interstate Power and Light Co), an investor-owned utility, serves all of Thomson.
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 Thomson water system
The Thomson water system supplies Thomson: about 28% of residents live in its service area. About 72% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws ground water (EPA lists Thomson Maximum Security Center as seller) and serves 580 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 5,327 systems serving 501–1,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2022–Dec 2024, was 0.6 ppb, below the 15 ppb action level that applied. That’s lower than 56% 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. IL0150350.
4 home internet providers serve Thomson
83% of 299 addresses can get 100/20 Mbps; 83% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Jo-Carroll Energy, Inc. (NFP) | Fiber | 100% | 1,000/1,000 |
| Mediacom Xtream | Cable | 99% | 2,000/1,000 |
| Brightspeed | DSL | 75% | 60/5 |
| JCWIFI.com | Fixed wireless | 46% | 200/200 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Thomson’s trash rules yet
Pickup rules, the dump and recycling in Thomson.
Where your child goes to school
Public school districts and the school path by grade.
Thomson is in West Carroll Community Unit School District 314.
C−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 Jun 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 12, 2025.
Thomson is in ZIP code 61285
ZIP codes where Thomson residents live, with the share of the town in each.
| ZIP | Post office name | Share of Thomson | ZIP’s residents in Thomson |
|---|---|---|---|
| 61285 | Thomson, IL | 100% | 60% |
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 Thomson
Who supplies Thomson’s drinking water, and has it had violations?
The Thomson water system (EPA ID IL0150350). 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 0.6 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in Thomson?
Interstate Power and Light (Interstate Power and Light Co), an investor-owned utility.
What internet providers serve Thomson?
Jo-Carroll Energy, Inc. (NFP), Mediacom Xtream, Brightspeed, JCWIFI.com (FCC, as of December 2025).
What ZIP codes are in Thomson?
61285. Census 2020 ZIP Code Tabulation Areas.
What school district is Thomson in?
West Carroll Community Unit School District 314.
How do I register to vote in Thomson?
In Illinois you can register online until 16 days before Election Day, in person up to and including Election Day, or by mail (postmarked 28 days before). Elections here are run by the Carroll County Clerk. Check your registration at ova.elections.il.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 Sep 12, 2025 (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.