Frederick County, Maryland
32 ZIP codes · Avg score 60/100 · Grade C · Updated
ZipCheckup grade for Frederick County: C.
A mixed picture - some signals here are worth your attention.
Based on current EPA data, Frederick County's 32 ZIP codes reflect fair but mixed water safety.
How Frederick County Compares
How Frederick County Compares
Frederick County scores 9 points below the Maryland state average (69/100) and 13 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 Last verified:
ZIP Code Risk Map
Water Quality Map: Frederick County, Maryland
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.6 (asthma 9.5%, diabetes 10.6%)
Estimated additional annual cost per homeowner: $1,988, driven primarily by sea_level
54.9% of homes built before 1978 (lead paint era)
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 DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,988
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
119,553 housing units in Frederick 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 Frederick County
Remediation costs are relatively manageable for most homeowners in Frederick County, representing a small fraction of property value.
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 Frederick County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Frederick County
8 community water systems serving Frederick County.
- D
- D
- C
- C
- D
- D
Show all 8 water systems
- C
- C
27 total water systems serve Frederick County.
Systems with the most violations in Frederick County
5 water systems with recorded EPA violations.
- C
- D
- D
- D
- C
All ZIP Codes in Frederick County
32 ZIP codes tracked in Frederick County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 21755 | Jefferson | 67 | C | 0 | $494K |
| 2 | 21701 | Frederick | 66 | C | 3 | $405K |
| 3 | 21704 | Frederick | 66 | C | 2 | $586K |
| 4 | 21710 | Adamstown | 66 | C | 2 | $582K |
| 5 | 21716 | Brunswick | 66 | C | 2 | $335K |
| 6 | 21754 | Ijamsville | 66 | C | 2 | $620K |
| 7 | 21770 | Monrovia | 66 | C | 2 | $600K |
| 8 | 21774 | New Market | 66 | C | 2 | $508K |
| 9 | 21777 | Point Of Rocks | 66 | C | 2 | $441K |
| 10 | 21702 | Frederick | 65 | C | 4 (1 health) | $385K |
| 11 | 21793 | Walkersville | 64 | C | 8 | $416K |
| 12 | 21015 | Bel Air | 49 | D | 3 | $418K |
| 13 | 21703 | Frederick | 49 | D | 2 | $364K |
| 14 | 21769 | Middletown | 49 | D | 2 | $491K |
| 15 | 21771 | Mount Airy | 48 | D | 6 | $532K |
| 16 | 21788 | Thurmont | 48 | D | 5 | $343K |
| 17 | 21705 | Frederick | — | — | 0 | — |
| 18 | 21709 | Frederick | — | — | — | |
| 19 | 21714 | Braddock Heights | — | — | 0 | $315K |
| 20 | 21717 | Buckeystown | — | — | $430K | |
| 21 | 21718 | Burkittsville | — | — | $447K | |
| 22 | 21727 | Emmitsburg | — | — | 5 | $304K |
| 23 | 21758 | Knoxville | — | — | 2 | $388K |
| 24 | 21759 | Ladiesburg | — | — | — | |
| 25 | 21762 | Libertytown | — | — | — | |
| 26 | 21773 | Myersville | — | — | 0 | $476K |
| 27 | 21775 | New Midway | — | — | — | |
| 28 | 21778 | Rocky Ridge | — | — | 0 | $416K |
| 29 | 21780 | Sabillasville | — | — | 1 | $420K |
| 30 | 21790 | Tuscarora | — | — | 2 | — |
| 31 | 21792 | Unionville | — | — | — | |
| 32 | 21798 | Woodsboro | — | — | 7 | $466K |
Recommended Buyer Guides for Frederick County
Four sources - EPA, NSF, FEMA, CDC - drive the match.
- Best Lead Paint Test Kits — 54.9% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Frederick County, Maryland
Overview
Frederick County in Maryland covers 32 tracked ZIP records with an average Home Safety Score of C (60/100) across 16 scored records.
20 of 25 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.