Queen Anne's County, Maryland
15 ZIP codes · Avg score 80/100 · Grade B · Updated 2026-06-04
Spanning 15 ZIP codes, Queen Anne's County posts strong drinking water compliance — most systems have never triggered a health-based notice.
How Queen Anne's County Compares
How Queen Anne's County Compares
Queen Anne's County scores 19 points above the Maryland state average (61/100) and 12 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Queen Anne's County, Maryland
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13 (asthma 10.2%, diabetes 11.9%)
Estimated additional annual cost per homeowner: $3,051, driven primarily by sea_level
Infrastructure: 0.305% avg pipe failure probability
50.4% of homes built before 1978 (lead paint era)
Violation History (2022–2024)
→ Stable trendEPA violation counts by year across Queen Anne's County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 9 violations. Past 5 years: 13 total (13 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $3,051
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
24,456 housing units in Queen Anne's 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 Queen Anne's County
Remediation costs are relatively manageable for most homeowners in Queen Anne's 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 Queen Anne's County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Queen Anne's County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Prospect Bay | 913 | 20 |
| 2 | Stevensville | 9,155 | 14 |
| 3 | Town of Centreville | 3,322 | 13 |
| 4 | Swann Haven Mobile Home Park | 44 | 9 |
| 5 | Piney Creek Corporation | 31 | 9 |
26 total water systems serve Queen Anne's County.
All ZIP Codes in Queen Anne's County
15 ZIP codes tracked in Queen Anne's County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 21623 | Church Hill | 98 | A | 2 (1 health) | $383K |
| 2 | 21668 | Sudlersville | 98 | A | 2 | $349K |
| 3 | 21690 | Chestertown | 98 | A | 2 (1 health) | — |
| 4 | 21657 | Queen Anne | 95 | A | 0 | $354K |
| 5 | 21617 | Centreville | 89 | A | 5 (1 health) | $461K |
| 6 | 21651 | Millington | 88 | A | 2 | $260K |
| 7 | 21619 | Chester | 80 | B | 9 (2 health) | $459K |
| 8 | 21638 | Grasonville | 78 | B | 4 (2 health) | $491K |
| 9 | 21658 | Queenstown | 76 | B | 6 | $471K |
| 10 | 21666 | Stevensville | 68 | C | 5 | $479K |
| 11 | 21607 | Barclay | 66 | C | 0 | $405K |
| 12 | 21644 | Ingleside | 66 | C | 0 | — |
| 13 | 21649 | Marydel | 66 | C | 0 | $199K |
| 14 | 21670 | Templeville | 66 | C | 0 | — |
| 15 | 20736 | Owings | 65 | C | 0 | $571K |
Recommended Buyer Guides for Queen Anne's County
Editorial-only picks, screened against the EPA detections on file.
- Best Lead Paint Test Kits — 50.4% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Queen Anne's County, Maryland
Overview
Queen Anne's County in Maryland covers 15 ZIP codes with an average Home Safety Score of B (80/100).
9 of 15 ZIP codes have recorded EPA violations. 7 health-based violations have been documented.
← Back to Maryland water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.