Wester Ogle · Photo: Pubdog at en.wikipedia · Public domainLiving in Garrison, MD: what to set up and who to call
The City of Baltimore water system reported 3 health-based violations to EPA in the last five years: disinfection byproducts (TTHM) ×2, a bacteria testing requirement (Revised Total Coliform Rule). 82% of systems its size reported none. Garrison has no town government of its own, so Baltimore County runs its elections and most services, and its children attend Baltimore County Public Schools.
I’m new in town
What to set up in Garrison, 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 Garrison.
Power comes from Baltimore Gas & Electric
Baltimore Gas & Electric (Baltimore Gas & Electric Co), an investor-owned utility, serves all of Garrison. 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 City of Baltimore water system
The City of Baltimore water system supplies almost all of Garrison. It draws surface water and serves 1,600,000 people in all.
3 health-based violations reported to EPA in the five years to October 2026: disinfection byproducts (TTHM) ×2, a bacteria testing requirement (Revised Total Coliform Rule), the latest beginning Apr 2026. 82% of the 27 systems serving more than 1,000,000 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2022–Dec 2024, was 2.7 ppb, below the 15 ppb action level that applied. The highest in five years was 3.5 ppb. That’s higher than 64% 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. MD0300002.
6 home internet providers serve Garrison
100% of 1,696 addresses can get 100/20 Mbps; 89% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 99% | 2,000/250 |
| Verizon | Fiber, Fixed wireless | 98% | 980/880 |
| Believe Broadband | Fixed wireless | 99% | 10/1 |
| T-Mobile | Fixed wireless | 81% | 100/20 |
| AT&T | Fixed wireless | 72% | 100/20 |
| BridgeMAXX Suncoast Broadband | Fixed wireless | 31% | 50/10 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Garrison’s trash rules yet
Pickup rules, the dump and recycling in Garrison.
Where your child goes to school
Public school districts and the school path by grade.
Garrison is in Baltimore County Public Schools.
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
Garrison is unincorporated, so Baltimore County is the local government.
Election office: FVAP local election office directory, updated Jul 2023; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Mar 11, 2026.
Garrison spans 2 ZIP codes
ZIP codes where Garrison residents live, with the share of the town in each.
| ZIP | Post office name | Share of Garrison | ZIP’s residents in Garrison |
|---|---|---|---|
| 21117 | Owings Mills, MD | 62% | 10% |
| 21208 | Pikesville, MD | 38% | 10% |
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 Garrison
Who supplies Garrison’s drinking water, and has it had violations?
The City of Baltimore water system (EPA ID MD0300002). It reported 3 health-based violations to EPA in the five years to October 2026: disinfection byproducts (TTHM) ×2, a bacteria testing requirement (Revised Total Coliform Rule). 82% of systems its size had none. Its latest lead 90th percentile was 2.7 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in Garrison?
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 Garrison?
Xfinity, Verizon, Believe Broadband, T-Mobile, AT&T, BridgeMAXX Suncoast Broadband (FCC, as of December 2025).
What ZIP codes are in Garrison?
21117 (62%), 21208 (38%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Garrison in?
Baltimore County Public Schools.
How do I register to vote in Garrison?
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 Baltimore 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.