ZIP code 21503 is located in Maryland. This area is served by 19 utility providers across 3 categories. The average residential electricity rate here is 7.7¢/kWh.
Estimated monthly utility costs
Cost data not available for this ZIP code.
Electric
Water
Sewer
Frequently asked questions
How do I set up utilities when moving to 21503?
Contact each provider separately before your move-in date. Start with electric (The Potomac Edison Company) since those typically need a few business days to activate. Water and sewer are often handled with one call to your local utility. Set up internet last since it may require an installation visit.
Is electricity expensive in 21503?
No — electricity in ZIP code 21503 costs about 49% less than the national average. Compared to Maryland overall, rates here are about 34% lower. Based on 2023 NREL residential electricity rate data.
Disclaimer: Provider information is sourced from federal databases including HIFLD, EPA SDWIS, FCC Broadband Data, and EIA-861. Utility cost estimates are from the U.S. Census Bureau American Community Survey 5-Year Estimates. Electric rates are based on 2023 NREL data. Coverage areas are approximate and may not reflect recent changes. Please verify directly with your provider.
Data sources: U.S. Census Bureau, NREL, EIA-861, HIFLD, EPA, FCC. Last updated: April 2026.