Living in Bryn Mawr-Skyway, WA: what to set up and who to call
Bryn Mawr-Skyway has no town government of its own, so King County runs its elections and most services, and its children attend Renton School District. Power in Bryn Mawr-Skyway comes from City of Milton, a municipal utility rather than a private company.
I’m new in town
What to set up in Bryn Mawr-Skyway, 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 Bryn Mawr-Skyway.
Power comes from City of Milton
City of Milton (City of Milton - (WA)), a municipal utility, serves all of Bryn Mawr-Skyway.
Start or move service: cityofmilton.net · (253) 922-8733
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Skyway Water & Sewer
Skyway Water & Sewer supplies Bryn Mawr-Skyway: about 64% of residents live in its service area. City of Renton serves another 19%. Seattle Public Utilities serves another 15%. About 8% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It buys treated surface water (EPA lists City of Renton and Seattle Public Utilities as sellers) and serves 12,036 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 2023–Dec 2025, was 0.0 ppb, below the 15 ppb action level that applied. The highest in five years was 1.0 ppb. Results below detection are reported as 0, so 0 doesn’t mean no lead at any tap.
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. WA5338800.
6 home internet providers serve Bryn Mawr-Skyway
100% of 4,792 addresses can get 100/20 Mbps; 57% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 99% | 2,000/250 |
| Quantum Fiber | Fiber | 65% | 8,000/8,000 |
| CenturyLink | DSL, Fiber | 33% | 940/200 |
| T-Mobile | Fixed wireless | 82% | 100/20 |
| AT&T | Fixed wireless | 34% | 100/20 |
| Verizon | Fixed wireless | 20% | 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 1 miles away
Pickup rules, the dump and recycling in Bryn Mawr-Skyway.
Republic Services
This isn’t Bryn Mawr-Skyway’s own facility. Whether Bryn Mawr-Skyway 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.
Bryn Mawr-Skyway is in Renton School District.
C+School 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
Bryn Mawr-Skyway is unincorporated, so King County is the local government.
Election office: FVAP local election office directory, updated Sep 2021; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 30, 2026.
Bryn Mawr-Skyway is in ZIP code 98178
ZIP codes where Bryn Mawr-Skyway residents live, with the share of the town in each.
| ZIP | Post office name | Share of Bryn Mawr-Skyway | ZIP’s residents in Bryn Mawr-Skyway |
|---|---|---|---|
| 98178 | Seattle, WA | 100% | 67% |
A few homes fall in 98057.
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 Bryn Mawr-Skyway
Who supplies Bryn Mawr-Skyway’s drinking water, and has it had violations?
Skyway Water & Sewer (EPA ID WA5338800). 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 0.0 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Bryn Mawr-Skyway?
City of Milton (City of Milton - (WA)), a municipal utility.
What internet providers serve Bryn Mawr-Skyway?
Xfinity, Quantum Fiber, CenturyLink, T-Mobile, AT&T, Verizon (FCC, as of December 2025).
What ZIP codes are in Bryn Mawr-Skyway?
98178. Census 2020 ZIP Code Tabulation Areas.
What school district is Bryn Mawr-Skyway in?
Renton School District.
How do I register to vote in Bryn Mawr-Skyway?
In Washington you can register online until 8 days before Election Day, in person up to and including Election Day, or by mail (received 8 days before). Elections here are run by the King County Elections. Check your registration at voter.votewa.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 30, 2026 (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.