Calvert County, Maryland
14 ZIP codes · Avg score 66/100 · Grade C
ZipCheckup grade for Calvert County: C.
A mixed picture - some signals here are worth your attention.
ZipCheckup gives Calvert County a C; the county page lists 14 ZIP codes, each with its own report.
How Calvert County Compares
How Calvert County Compares
Calvert County scores 3 points below the Maryland state average (69/100) and 7 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: Calvert 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 10.5%, diabetes 10.9%)
Modeled additional annual cost estimate per homeowner: $2,949, largest modeled factor: Flood
32% 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: $2,949
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
36,588 housing units in Calvert 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 Calvert County
Modeled remediation costs in Calvert 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 Calvert County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems mapped to Calvert County ZIP codes
8 community water systems mapped to Calvert County ZIP codes; EPA may list more systems serving the county.
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Show all 8 water systems
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- C
15 water systems mapped to Calvert County ZIP codes in our data; EPA may list more systems serving the county.
Systems with the most violations in Calvert County
5 water systems with violations in EPA records.
- C
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All ZIP Codes in Calvert County
14 ZIP codes tracked in Calvert County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 20629 | Dowell | 67 | C | 0 | $460K |
| 2 | 20688 | Solomons | 67 | C | 0 | — |
| 3 | 20657 | Lusby | 66 | C | 2 | $318K |
| 4 | 20678 | Prince Frederick | 66 | C | 2 | $428K |
| 5 | 20732 | Chesapeake Beach | 65 | C | 5 (1 health) | $426K |
| 6 | 20610 | Barstow | — | — | — | |
| 7 | 20615 | Broomes Island | — | — | $479K | |
| 8 | 20639 | Huntingtown | — | — | 1 | $528K |
| 9 | 20676 | Port Republic | — | — | 2 | $472K |
| 10 | 20685 | Saint Leonard | — | — | 2 | $431K |
| 11 | 20689 | Sunderland | — | — | 1 | $468K |
| 12 | 20714 | North Beach | — | — | 5 (1 health) | $363K |
| 13 | 20736 | Owings | — | — | 5 (1 health) | $571K |
| 14 | 20754 | Dunkirk | — | — | 0 | $601K |
Recommended Buyer Guides for Calvert County
The mix of guides changes from county to county.
- 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 Calvert County, Maryland
Overview
Calvert County in Maryland covers 14 tracked ZIP records with an average Home Safety Score of C (66/100) across 5 scored records.
9 of 12 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 1 health-based violation 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.