Warfield Complex, Hubner, and T Buildings · Photo: Acroterion · CC BY-SA 3.0Living in Eldersburg, MD: what to set up and who to call
Eldersburg has no town government of its own, so Carroll County runs its elections and most services, and its children attend Carroll County Public Schools. Eldersburg has its own library, Eldersburg Branch, at 6400 W. Hemlock Dr.
I’m new in town
What to set up in Eldersburg, 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 Eldersburg.
Power comes from Baltimore Gas & Electric
Baltimore Gas & Electric (Baltimore Gas & Electric Co), an investor-owned utility, serves all of Eldersburg. Its homes paid an average of 20.2¢ per kWh in 2025, about $177 a month (its average across Maryland, for customers on its standard service). Maryland lets you buy power from another supplier; 6% of Baltimore Gas & Electric’s home customers do, and Baltimore Gas & Electric still delivers it.
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Freedom District
Freedom District supplies Eldersburg: about 78% of residents live in its service area. About 21% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws surface water (EPA lists Springfield Hospital Distribution as seller) and serves 24,867 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 2018–Dec 2020, was 0.0 ppb, below the 15 ppb action level that applied. It’s from 2020: EPA has no newer result for this system. 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. MD0060002.
5 home internet providers serve Eldersburg
98% of 10,564 addresses can get 100/20 Mbps; 70% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 98% | 2,000/250 |
| Antietam Cable | Fiber | 72% | 5,000/5,000 |
| T-Mobile | Fixed wireless | 45% | 100/20 |
| Verizon | Fixed wireless | 44% | 300/20 |
| AT&T | Fixed wireless | 42% | 25/3 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Eldersburg’s trash rules yet
Pickup rules, the dump and recycling in Eldersburg.
Where your child goes to school
Public school districts and the school path by grade.
Eldersburg is in Carroll County Public Schools.
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
Eldersburg is unincorporated, so Carroll County is the local government.
Election office: FVAP local election office directory, updated Aug 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Mar 11, 2026.
Eldersburg spans 2 ZIP codes
ZIP codes where Eldersburg residents live, with the share of the town in each.
| ZIP | Post office name | Share of Eldersburg | ZIP’s residents in Eldersburg |
|---|---|---|---|
| 21784 | Sykesville, MD | 92% | 75% |
| 21104 | Marriottsville, MD | 8% | 43% |
A few homes fall in 21797, 21048.
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 Eldersburg
Who supplies Eldersburg’s drinking water, and has it had violations?
Freedom District (EPA ID MD0060002). 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 2018–Dec 2020), against a 15 ppb action level.
Who provides electricity in Eldersburg?
Baltimore Gas & Electric (Baltimore Gas & Electric Co), an investor-owned utility. Its homes paid about 20.2¢ per kWh in 2025 (EIA).
What internet providers serve Eldersburg?
Xfinity, Antietam Cable, T-Mobile, Verizon, AT&T (FCC, as of December 2025).
What ZIP codes are in Eldersburg?
21784 (92%), 21104 (8%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Eldersburg in?
Carroll County Public Schools.
How do I register to vote in Eldersburg?
In Maryland you can register online until 21 days before Election Day, in person up to and including Election Day, or by mail (postmarked 21 days before). Elections here are run by the Carroll County Board of Elections. Check your registration at voterservices.elections.maryland.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 Mar 11, 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.