Living in Sierra Ridge, CO: what to set up and who to call
Sierra Ridge has no town government of its own, so Douglas County runs its elections and most services, and its children attend Douglas County School District RE-1. Power in Sierra Ridge comes from CORE Electric Cooperative, a cooperative utility rather than a private company.
I’m new in town
What to set up in Sierra Ridge, 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 Sierra Ridge.
Power comes from CORE Electric Cooperative
CORE Electric Cooperative (CORE Electric Cooperative), a cooperative utility, serves all of Sierra Ridge. Its homes paid an average of 15.6¢ per kWh in 2025, about $132 a month (its average across Colorado).
Start or move service: irea.coop · (303) 688-3100
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Parker WSD
Parker WSD supplies almost all of Sierra Ridge. It draws surface water (EPA lists Wise Project as seller) and serves 75,949 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 90% of the 597 systems serving 50,001–100,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Jun 2026, was 2.6 ppb, below the 15 ppb action level that applied. The highest in five years was 3.9 ppb. That’s higher than 77% 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. CO0118040.
10 home internet providers serve Sierra Ridge
100% of 927 addresses can get 100/20 Mbps; 92% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable, Fiber | 100% | 2,000/2,000 |
| Quantum Fiber | Fiber | 98% | 2,000/1,000 |
| CenturyLink | Fiber, DSL | 13% | 1,000/1,000 |
| BAM Broadband | Fixed wireless | 96% | 1,000/100 |
| Kellin Communications | Fixed wireless | 79% | 1,000/220 |
| Verizon | Fixed wireless | 66% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
The nearest public drop-off is 4 miles away
Pickup rules, the dump and recycling in Sierra Ridge.
Waste Connections Denver South Jordan Road Transfer Station
7120 South Jordan Road, Centennial, CO, 80112
This isn’t Sierra Ridge’s own facility. Whether Sierra Ridge residents may use it is the town’s rule: check the town’s office.
OpenStreetMap, as of Oct 9, 2026. © OpenStreetMap contributors.
Where your child goes to school
Public school districts and the school path by grade.
Sierra Ridge is in Douglas County School District RE-1.
ASchool gradeSee Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
No town hall: the county runs things
Sierra Ridge is unincorporated, so Douglas County is the local government.
Election office: FVAP local election office directory, updated Jul 2026; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Sierra Ridge is in ZIP code 80134
ZIP codes where Sierra Ridge residents live, with the share of the town in each.
| ZIP | Post office name | Share of Sierra Ridge | ZIP’s residents in Sierra Ridge |
|---|---|---|---|
| 80134 | Parker, CO | 100% | 5% |
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 Sierra Ridge
Who supplies Sierra Ridge’s drinking water, and has it had violations?
Parker WSD (EPA ID CO0118040). It reported no health-based violations to EPA in the five years to October 2026; 90% of systems its size had none. Its latest lead 90th percentile was 2.6 ppb (Jan–Jun 2026), against a 15 ppb action level.
Who provides electricity in Sierra Ridge?
CORE Electric Cooperative (CORE Electric Cooperative), a cooperative utility. Its homes paid about 15.6¢ per kWh in 2025 (EIA).
What internet providers serve Sierra Ridge?
Xfinity, Quantum Fiber, CenturyLink, BAM Broadband, Kellin Communications, Verizon (FCC, as of December 2025).
What ZIP codes are in Sierra Ridge?
80134. Census 2020 ZIP Code Tabulation Areas.
What school district is Sierra Ridge in?
Douglas County School District RE-1.
How do I register to vote in Sierra Ridge?
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 Douglas 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: 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.