Photo: Billy Hathorn · CC BY-SA 3.0Living in Thornton, CO: what to set up and who to call
Most mail in Thornton goes to 80229 (26% of residents), one of 5 ZIP codes in town. Thornton has a train station, Eastlake & 124th.
I’m new in town
What to set up in Thornton, 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 Thornton.
Power comes from Xcel Energy
Xcel Energy (Public Service Co. of Colorado), an investor-owned utility, serves 74.7% of Thornton residents. Its homes paid an average of 15.9¢ per kWh in 2025, about $93 a month (its average across Colorado).
Start or move service: xcelenergy.com · (800) 895-4999
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from City of Thornton water system
The City of Thornton water system supplies Thornton: about 97% of residents live in its service area. About 3% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws surface water and serves 226,465 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 86% of the 332 systems serving 100,001–250,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2025, was 2.3 ppb, below the 15 ppb action level that applied. That’s higher than 71% 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. CO0101150.
11 home internet providers serve Thornton
100% of 43,349 addresses can get 100/20 Mbps; 35% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable, Fiber | 100% | 2,000/250 |
| CenturyLink | DSL, Fiber | 68% | 140/20 |
| Quantum Fiber | Fiber | 30% | 8,000/8,000 |
| Intrepid Fiber Networks | Fiber | 13% | 2,000/2,000 |
| Ting | Fiber | 9% | 2,000/2,000 |
| Rise Broadband | Fixed wireless | 82% | 500/100 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
Trash day in Thornton depends on your street
Pickup days, the drop-off and recycling in Thornton, from the town’s own site.
Your pickup week
- TrashEvery week, on your street’s dayLook up your day on thorntonco.gov
- RecyclingEvery other weekCheck which week on thorntonco.gov →
- Bulky itemsCall to book
When a holiday falls on a weekday, pickup slides one day later for the rest of that week.
Infrastructure Maintenance Center (IMC)
12450 Washington Street
- Mon7:30 am–3:30 pm
- Tue7:30 am–3:30 pm
- Wed7:30 am–3:30 pm
- Thu7:30 am–3:30 pm
- Fri7:30 am–3:30 pm
Accepted at the curb
- Flattened cardboard
- Magazines
- Office paper
- Junk mail
- Phone books
- Paper board (cereal boxes, soda boxes, paper towel rolls, etc.)
- Brown paper bags
- Newspapers and inserts
- Glass bottles and jars
- Aluminum cans
- Steel cans
- Empty aerosol cans
- Plastic containers 1-7
Thornton Municipal Service Center
88th Avenue & Colorado Boulevard
Infrastructure Maintenance Center
12450 Washington Street
From thorntonco.gov, the town’s official site, checked Oct 21, 2026; pages dated 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.
Most of Thornton (59%) is in Adams 12 Five Star Schools; parts are in School District 27J (27%) and Mapleton School District 1 (8%) and Adams County School District 14 (6%).
B+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 Sep 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Thornton spans 5 ZIP codes
ZIP codes where Thornton residents live, with the share of the town in each.
| ZIP | Post office name | Share of Thornton | ZIP’s residents in Thornton |
|---|---|---|---|
| 80229 | Denver, CO | 26% | 68% |
| 80602 | Brighton, CO | 23% | 75% |
| 80241 | Thornton, CO | 22% | 95% |
| 80233 | Denver, CO | 16% | 48% |
| 80260 | Denver, CO | 12% | 47% |
A few homes fall in 80023, 80221.
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.
Train: OpenStreetMap (© OpenStreetMap contributors). ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.
Questions about living in Thornton
Who supplies Thornton’s drinking water, and has it had violations?
The City of Thornton water system (EPA ID CO0101150). It reported no health-based violations to EPA in the five years to October 2026; 86% of systems its size had none. Its latest lead 90th percentile was 2.3 ppb (Jan–Dec 2025), against a 15 ppb action level.
Who provides electricity in Thornton?
Xcel Energy (Public Service Co. of Colorado), an investor-owned utility. Its homes paid about 15.9¢ per kWh in 2025 (EIA).
What internet providers serve Thornton?
Xfinity, CenturyLink, Quantum Fiber, Intrepid Fiber Networks, Ting, Rise Broadband (FCC, as of December 2025).
What ZIP codes are in Thornton?
80229 (26%), 80602 (23%), 80241 (22%), 80233 (16%), 80260 (12%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Thornton in?
Adams 12 Five Star Schools. Parts of the city are in School District 27J and Mapleton School District 1 and Adams County School District 14.
How do I register to vote in Thornton?
In Colorado you can register online until 8 days before Election Day, in person up to and including Election Day, or by mail (postmarked 8 days before). Elections here are run by the Adams County Clerk and Recorder. Check your registration at sos.state.co.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: Thornton’s own website (thorntonco.gov), 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.