Carroll County, Maryland
11 ZIP codes · Avg score 52/100 · Grade D
ZipCheckup grade for Carroll County: D.
Federal records show several conditions worth reviewing.
A low composite grade for Carroll County is a reason to look closely at your own ZIP report, one of 11 listed, rather than proof of a problem at your tap.
How Carroll County Compares
How Carroll County Compares
Carroll County scores 17 points below the Maryland state average (69/100) and 21 points below the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData
ZIP Code Risk Map
Water Quality Map: Carroll County, Maryland
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.4 (asthma 10.1%, diabetes 10.3%)
Modeled additional annual cost estimate per homeowner: $1,450, largest modeled factor: Flood
46% of homes built before 1980 (lead paint was banned for residential use in 1978)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,450
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
62,101 housing units in Carroll County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Carroll County
Modeled remediation costs in Carroll County can be compared with the median property value; actual costs vary by property.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Carroll County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems mapped to Carroll County ZIP codes
8 community water systems mapped to Carroll County ZIP codes; EPA may list more systems serving the county.
- C
- D
- C
- D
- D
- D
Show all 8 water systems
12 water systems mapped to Carroll County ZIP codes in our data; EPA may list more systems serving the county.
Systems with the most violations in Carroll County
5 water systems with violations in EPA records.
- C
- C
- D
All ZIP Codes in Carroll County
11 ZIP codes tracked in Carroll County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 21784 | Sykesville | 63 | C | 8 (4 health) | $478K |
| 2 | 21074 | Hampstead | 50 | D | 0 | $350K |
| 3 | 21102 | Manchester | 50 | D | 0 | $375K |
| 4 | 21787 | Taneytown | 50 | D | 0 | $345K |
| 5 | 21157 | Westminster | 49 | D | 2 (1 health) | $394K |
| 6 | 21048 | Finksburg | — | — | 4 (1 health) | $424K |
| 7 | 21088 | Lineboro | — | — | — | |
| 8 | 21158 | Westminster | — | — | 3 (1 health) | $375K |
| 9 | 21757 | Keymar | — | — | 7 | $414K |
| 10 | 21776 | New Windsor | — | — | 1 | $434K |
| 11 | 21791 | Union Bridge | — | — | 0 | $370K |
Recommended Buyer Guides for Carroll County
Read the note next to each link: it gives the reason, such as a radon zone designation or housing age, that led to the recommendation.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Carroll County, Maryland
Overview
Carroll County in Maryland covers 11 tracked ZIP records with an average Home Safety Score of D (52/100) across 5 scored records.
6 of 10 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 6 health-based violations appear in the available health breakdown.
← Back to Maryland Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
What You Can Do
Carroll County has an average Home Safety grade of D across its scored ZIP records. Here are steps to protect your household.
Test your tap water
Ask a certified laboratory which tests it offers for lead, bacteria, and other contaminants relevant to your home; a $20-$50 kit may cover only certain contaminants.
Consider a certified water filter
NSF/ANSI-certified filters reduce the specific contaminants listed on their certification. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It reports monitored contaminants detected in the utility's water and related compliance information.
Check for lead in your home
46% of homes in this county were built before 1980. Older plumbing and solder can leach lead into drinking water, especially after water sits in the pipes.