Anne Arundel County, Maryland
80 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-06-04
Based on current EPA data, Anne Arundel County's 80 ZIP codes reflect fair but mixed water safety.
How Anne Arundel County Compares
How Anne Arundel County Compares
Anne Arundel County scores 1 points below the Maryland state average (61/100) and 8 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Anne Arundel County, Maryland
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.2 (asthma 10.5%, diabetes 11.7%)
Estimated additional annual cost per homeowner: $2,232, driven primarily by flood
Infrastructure: 0.347% avg pipe failure probability, 22% of ZIPs at high risk
59.7% of homes built before 1978 (lead paint era)
Violation History (2022–2024)
→ Stable trendEPA violation counts by year across Anne Arundel County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 37 violations. Past 5 years: 75 total (75 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: $2,232
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
529,989 housing units in Anne Arundel 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 Anne Arundel County
Remediation costs are relatively manageable for most homeowners in Anne Arundel 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 Anne Arundel 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 Anne Arundel County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Glen Burnie-broadneck | 290,606 | 18 |
| 2 | Broad Creek | 23,179 | 11 |
| 3 | CITY OF BALTIMORE | 1,600,000 | 11 |
| 4 | Campus Hills Water Works | 250 | 11 |
| 5 | The Neighborhoods at St. Elizabeth | 162 | 11 |
33 total water systems serve Anne Arundel County.
All ZIP Codes in Anne Arundel County
80 ZIP codes tracked in Anne Arundel County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 20711 | Lothian | 83 | B | 0 | $390K |
| 2 | 21402 | Annapolis | 83 | B | 1 | — |
| 3 | 21404 | Annapolis | 83 | B | 1 | — |
| 4 | 21405 | Annapolis | 83 | B | 1 | $944K |
| 5 | 21411 | Annapolis | 83 | B | 1 | — |
| 6 | 21412 | Annapolis | 83 | B | 1 | — |
| 7 | 21054 | Gambrills | 82 | B | 3 (1 health) | $588K |
| 8 | 21240 | Baltimore | 81 | B | 11 (2 health) | — |
| 9 | 20724 | Laurel | 78 | B | 0 | $393K |
| 10 | 21114 | Crofton | 78 | B | 0 | $480K |
| 11 | 21090 | Linthicum Heights | 77 | B | 3 (1 health) | $374K |
| 12 | 21144 | Severn | 77 | B | 2 (1 health) | $468K |
| 13 | 21108 | Millersville | 74 | B | 5 (1 health) | $543K |
| 14 | 21401 | Annapolis | 73 | B | 1 | $581K |
| 15 | 21409 | Annapolis | 73 | B | 1 | $500K |
| 16 | 21146 | Severna Park | 72 | B | 3 (1 health) | $644K |
| 17 | 21403 | Annapolis | 68 | C | 1 | $567K |
| 18 | 20701 | Annapolis Junction | 63 | C | 0 | — |
| 19 | 20776 | Harwood | 63 | C | 0 | $588K |
| 20 | 21028 | Churchville | 63 | C | 0 | $476K |
| 21 | 21051 | Fork | 63 | C | 0 | $563K |
| 22 | 21052 | Fort Howard | 63 | C | 0 | $268K |
| 23 | 21056 | Gibson Island | 63 | C | 0 | $2000K |
| 24 | 21076 | Hanover | 63 | C | 0 | $492K |
| 25 | 21077 | Harmans | 63 | C | 0 | $425K |
| 26 | 21087 | Kingsville | 63 | C | 0 | $505K |
| 27 | 21094 | Lutherville Timonium | 63 | C | 0 | — |
| 28 | 21128 | Perry Hall | 63 | C | 0 | $424K |
| 29 | 21131 | Phoenix | 63 | C | 0 | $663K |
| 30 | 21139 | Riderwood | 63 | C | 0 | — |
| 31 | 21140 | Riva | 63 | C | 0 | $598K |
| 32 | 21226 | Curtis Bay | 63 | C | 0 | $319K |
| 33 | 21286 | Towson | 63 | C | 0 | $402K |
| 34 | 20765 | Galesville | 55 | C | 0 | $481K |
| 35 | 20778 | West River | 55 | C | 0 | $718K |
| 36 | 21022 | Brooklandville | 55 | C | 0 | — |
| 37 | 21032 | Crownsville | 55 | C | 0 | $643K |
| 38 | 21035 | Davidsonville | 55 | C | 0 | $801K |
| 39 | 21047 | Fallston | 55 | C | 0 | $517K |
| 40 | 21050 | Forest Hill | 55 | C | 0 | $439K |
| 41 | 21060 | Glen Burnie | 55 | C | 0 | $353K |
| 42 | 21061 | Glen Burnie | 55 | C | 0 | $326K |
| 43 | 21075 | Elkridge | 55 | C | 0 | $439K |
| 44 | 21111 | Monkton | 55 | C | 0 | $585K |
| 45 | 21113 | Odenton | 55 | C | 0 | $402K |
| 46 | 21133 | Randallstown | 55 | C | 0 | $302K |
| 47 | 21152 | Sparks Glencoe | 55 | C | 0 | $529K |
| 48 | 21162 | White Marsh | 55 | C | 0 | $463K |
| 49 | 21225 | Brooklyn | 55 | C | 0 | $214K |
| 50 | 21234 | Parkville | 55 | C | 0 | $276K |
| 51 | 21236 | Nottingham | 55 | C | 0 | $307K |
| 52 | 21237 | Rosedale | 55 | C | 0 | $280K |
| 53 | 21244 | Windsor Mill | 55 | C | 0 | $271K |
| 54 | 20755 | Fort George G Meade | 53 | D | 0 | — |
| 55 | 20773 | Upper Marlboro | 53 | D | 0 | — |
| 56 | 20792 | Upper Marlboro | 53 | D | 0 | — |
| 57 | 21013 | Baldwin | 53 | D | 0 | $578K |
| 58 | 21018 | Benson | 53 | D | 0 | — |
| 59 | 21031 | Hunt Valley | 53 | D | 0 | — |
| 60 | 21062 | Glen Burnie | 53 | D | 0 | — |
| 61 | 21065 | Hunt Valley | 53 | D | 0 | — |
| 62 | 21082 | Hydes | 53 | D | 0 | $525K |
| 63 | 21092 | Long Green | 53 | D | 0 | — |
| 64 | 21106 | Mayo | 53 | D | 0 | — |
| 65 | 21123 | Pasadena | 53 | D | 0 | — |
| 66 | 21252 | Towson | 53 | D | 0 | — |
| 67 | 21012 | Arnold | 50 | D | 0 | $552K |
| 68 | 21030 | Cockeysville | 50 | D | 0 | $436K |
| 69 | 21093 | Lutherville Timonium | 50 | D | 0 | $466K |
| 70 | 21204 | Towson | 50 | D | 0 | $572K |
| 71 | 21207 | Gwynn Oak | 50 | D | 0 | $248K |
| 72 | 21208 | Pikesville | 50 | D | 0 | $313K |
| 73 | 21221 | Essex | 50 | D | 0 | $267K |
| 74 | 21227 | Halethorpe | 50 | D | 0 | $272K |
| 75 | 21228 | Catonsville | 50 | D | 0 | $389K |
| 76 | 20764 | Shady Side | 45 | D | 0 | $377K |
| 77 | 21037 | Edgewater | 45 | D | 0 | $531K |
| 78 | 21219 | Sparrows Point | 45 | D | 0 | $371K |
| 79 | 21220 | Middle River | 45 | D | 0 | $280K |
| 80 | 21222 | Dundalk | 45 | D | 0 | $201K |
Recommended Buyer Guides for Anne Arundel County
Methodologically, the recommendation order reflects severity in the federal record: contaminants flagged in EPA detection records for this county outrank generic water concerns, FEMA-confirmed hazard ratings shift emergency-related categories upward, and CDC lead-exposure markers govern when lead-test kits and certified filters appear at the top of the list.
- Best Lead Paint Test Kits — 59.7% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- 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 Anne Arundel County, Maryland
Overview
Anne Arundel County in Maryland covers 80 ZIP codes with an average Home Safety Score of C (60/100).
14 of 80 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.