Delaware County, Pennsylvania
49 ZIP codes · Avg score 41/100 · Grade D · Updated
ZipCheckup grade for Delaware County: D.
Several federal signals point to home-safety risks in this ZIP.
Your top priority: see the breakdown below and consider a certified water filter. NSF certified filters →
While Delaware County's situation varies by ZIP, its 49 ZIP codes collectively fall below the state average - addressing specific concerns starts with checking the system that serves a given address.
How Delaware County Compares
How Delaware County Compares
Delaware County scores 16 points below the Pennsylvania state average (57/100) and 32 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: Delaware County, Pennsylvania
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Estimated additional annual cost per homeowner: $5,036, driven primarily by sea_level
83.1% of homes built before 1978 (lead paint era)
Violation History (2023–2026)
↓ Improving trendEPA violation counts by year across Delaware County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 71 violations. Past 5 years: 119 total (119 health-based). Health-based violations are declining versus the prior 2-year window.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
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: $5,036
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
220,390 housing units in Delaware 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 Delaware County
Remediation costs are relatively manageable for most homeowners in Delaware 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.
Water systems serving Delaware County
3 community water systems serving Delaware County.
- D
- D
- F
Systems with the most violations in Delaware County
2 water systems with recorded EPA violations.
- D
- F
All ZIP Codes in Delaware County
49 ZIP codes tracked in Delaware County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 19060 | Garnet Valley | 50 | D | 1 | $516K |
| 2 | 19061 | Marcus Hook | 50 | D | 0 | $230K |
| 3 | 19008 | Broomall | 40 | D | 30 (1 health) | $470K |
| 4 | 19013 | Chester | 40 | D | 30 (1 health) | $85K |
| 5 | 19014 | Aston | 40 | D | 30 (1 health) | $297K |
| 6 | 19015 | Brookhaven | 40 | D | 30 (1 health) | $233K |
| 7 | 19018 | Clifton Heights | 40 | D | 30 (1 health) | $215K |
| 8 | 19022 | Crum Lynne | 40 | D | 30 (1 health) | $124K |
| 9 | 19023 | Darby | 40 | D | 30 (1 health) | $117K |
| 10 | 19026 | Drexel Hill | 40 | D | 30 (1 health) | $243K |
| 11 | 19029 | Essington | 40 | D | 30 (1 health) | $186K |
| 12 | 19032 | Folcroft | 40 | D | 30 (1 health) | $140K |
| 13 | 19033 | Folsom | 40 | D | 30 (1 health) | $264K |
| 14 | 19036 | Glenolden | 40 | D | 30 (1 health) | $192K |
| 15 | 19043 | Holmes | 40 | D | 30 (1 health) | $250K |
| 16 | 19050 | Lansdowne | 40 | D | 30 (1 health) | $189K |
| 17 | 19052 | Lenni | 40 | D | 30 (1 health) | $355K |
| 18 | 19063 | Media | 40 | D | 30 (1 health) | $506K |
| 19 | 19064 | Springfield | 40 | D | 30 (1 health) | $390K |
| 20 | 19070 | Morton | 40 | D | 30 (1 health) | $284K |
| 21 | 19073 | Newtown Square | 40 | D | 30 (1 health) | $581K |
| 22 | 19074 | Norwood | 40 | D | 30 (1 health) | $228K |
| 23 | 19076 | Prospect Park | 40 | D | 30 (1 health) | $239K |
| 24 | 19078 | Ridley Park | 40 | D | 30 (1 health) | $245K |
| 25 | 19079 | Sharon Hill | 40 | D | 30 (1 health) | $160K |
| 26 | 19081 | Swarthmore | 40 | D | 30 (1 health) | $334K |
| 27 | 19082 | Upper Darby | 40 | D | 30 (1 health) | $155K |
| 28 | 19083 | Havertown | 40 | D | 30 (1 health) | $424K |
| 29 | 19086 | Wallingford | 40 | D | 30 (1 health) | $425K |
| 30 | 19094 | Woodlyn | 40 | D | 30 (1 health) | $244K |
| 31 | 19113 | Philadelphia | 40 | D | 30 (1 health) | — |
| 32 | 19319 | Cheyney | 40 | D | 30 (1 health) | $570K |
| 33 | 19373 | Thornton | 40 | D | 30 (1 health) | $711K |
| 34 | 19342 | Glen Mills | 39 | F | 31 (1 health) | $579K |
| 35 | 19010 | Bryn Mawr | — | — | 30 (1 health) | $789K |
| 36 | 19016 | Chester | — | — | — | |
| 37 | 19028 | Edgemont | — | — | — | |
| 38 | 19037 | Glen Riddle Lima | — | — | — | |
| 39 | 19039 | Gradyville | — | — | — | |
| 40 | 19065 | Media | — | — | — | |
| 41 | 19080 | Wayne | — | — | — | |
| 42 | 19088 | Wayne | — | — | — | |
| 43 | 19089 | Wayne | — | — | — | |
| 44 | 19091 | Media | — | — | — | |
| 45 | 19098 | Holmes | — | — | — | |
| 46 | 19105 | Philadelphia | — | — | — | |
| 47 | 19331 | Concordville | — | — | — | |
| 48 | 19339 | Concordville | — | — | — | |
| 49 | 19340 | Concordville | — | — | — |
Recommended Buyer Guides for Delaware County
Strictly editorial - no paid placements influence which guides appear; the selection draws on NSF certifications and EPA detection records for water systems serving this county.
- Best Lead Paint Test Kits — 83.1% of homes built before 1978
- 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
Deep Dive Reports
Detailed analysis for Delaware County, Pennsylvania
Overview
Delaware County in Pennsylvania covers 49 tracked ZIP records with an average Home Safety Score of D (41/100) across 34 scored records.
34 of 35 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 Pennsylvania 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
Delaware County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. 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 details exactly what was found in your water supply.
Check for lead in your home
83.1% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.