Carroll County, Maryland Home Safety Rankings - 22 ZIPs

Carroll County, Maryland (Maryland) includes 22 tracked ZIP codes and 15 mapped community water systems; confirm service for a specific address. Below are the water quality rankings for metro ZIPs with all required inputs.

Average Home Safety Grade: C (58/100)

Top 10 ZIP Codes by Home Safety Score

10 Riskiest ZIP Codes

Most Common Contaminant Violations

Lead Risk

• Average of reported 90th-percentile lead results: 0.0025 mg/L (below EPA action level)
• 0 of 11 ZIP codes with known status exceed EPA lead action level
• 7% of housing built before 1950
• 21% of housing built before 1970

Cities in This Metro

• Rockville, MD — 4 ZIP codes
• Potomac, MD — 2 ZIP codes
• Highland, MD — 1 ZIP code
• Gaithersburg, MD — 1 ZIP code
• Stevensville, MD — 1 ZIP code
• Cooksville, MD — 1 ZIP code
• Glenelg, MD — 1 ZIP code
• Glenwood, MD — 1 ZIP code
• Lisbon, MD — 1 ZIP code
• Monrovia, MD — 1 ZIP code
• Mount Airy, MD — 1 ZIP code
• New Windsor, MD — 1 ZIP code
• Sykesville, MD — 1 ZIP code
• Taneytown, MD — 1 ZIP code
• Union Bridge, MD — 1 ZIP code
• Unionville, MD — 1 ZIP code
• West Friendship, MD — 1 ZIP code
• Woodbine, MD — 1 ZIP code

All 22 ZIP Codes Ranked

Data Sources

• Water quality: EPA SDWIS
• Housing: U.S. Census Bureau American Community Survey
• Flood: FEMA NFIP
• Flood scope: historical NFIP claim records and claim-rated-zone evidence; this is not current property-map coverage.

Reporting periods vary by source; the page metadata identifies this materialization.