Chester County, Pennsylvania
62 ZIP codes · Avg score 42/100 · Grade D · Updated
ZipCheckup grade for Chester 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 →
Across Chester County, EPA compliance records for 62 ZIP codes fall well below average - documented health-based violations affect multiple areas, and the county's sustained low grade points to structural rather than temporary shortfalls in the underlying water systems.
How Chester County Compares
How Chester County Compares
Chester County scores 15 points below the Pennsylvania state average (57/100) and 31 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: Chester 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: $4,094, driven primarily by sea_level
Violation History (2021–2026)
↓ Improving trendEPA violation counts by year across Chester County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 16 violations. Past 5 years: 39 total (39 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: $4,094
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Chester County
Remediation costs are relatively manageable for most homeowners in Chester 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 Chester County
8 community water systems serving Chester County.
- F
- F
- D
- F
- C
- D
Show all 8 water systems
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- F
30 total water systems serve Chester County.
Systems with the most violations in Chester County
5 water systems with recorded EPA violations.
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- F
- F
- F
- F
All ZIP Codes in Chester County
62 ZIP codes tracked in Chester County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 19365 | Parkesburg | 65 | C | 6 | $300K |
| 2 | 19343 | Glenmoore | 50 | D | 0 | $544K |
| 3 | 19374 | Toughkenamon | 50 | D | 0 | $289K |
| 4 | 19330 | Cochranville | 48 | D | 5 | $390K |
| 5 | 19352 | Lincoln University | 48 | D | 4 (1 health) | $459K |
| 6 | 19363 | Oxford | 48 | D | 7 | $342K |
| 7 | 19475 | Spring City | 48 | D | 6 (1 health) | $363K |
| 8 | 19350 | Landenberg | 46 | D | 8 (1 health) | $494K |
| 9 | 19425 | Chester Springs | 46 | D | 11 (2 health) | $622K |
| 10 | 19320 | Coatesville | 44 | D | 21 | $303K |
| 11 | 19520 | Elverson | 44 | D | 18 | $404K |
| 12 | 19311 | Avondale | 42 | D | 24 | $525K |
| 13 | 19301 | Paoli | 40 | D | 30 (1 health) | $537K |
| 14 | 19312 | Berwyn | 40 | D | 30 (1 health) | $805K |
| 15 | 19333 | Devon | 40 | D | 30 (1 health) | $689K |
| 16 | 19341 | Exton | 40 | D | 30 (1 health) | $487K |
| 17 | 19355 | Malvern | 40 | D | 30 (1 health) | $662K |
| 18 | 19375 | Unionville | 40 | D | 30 | $614K |
| 19 | 19390 | West Grove | 39 | F | 32 | $378K |
| 20 | 19317 | Chadds Ford | 33 | F | 61 (1 health) | $589K |
| 21 | 19335 | Downingtown | 33 | F | 91 (1 health) | $464K |
| 22 | 19344 | Honey Brook | 33 | F | 90 (1 health) | $304K |
| 23 | 19348 | Kennett Square | 33 | F | 209 (1 health) | $518K |
| 24 | 19380 | West Chester | 33 | F | 70 (1 health) | $530K |
| 25 | 19382 | West Chester | 33 | F | 70 (1 health) | $542K |
| 26 | 19383 | West Chester | 33 | F | 60 (1 health) | — |
| 27 | 19310 | Atglen | — | — | 6 | $289K |
| 28 | 19316 | Brandamore | — | — | 0 | — |
| 29 | 19318 | Chatham | — | — | — | |
| 30 | 19346 | Kelton | — | — | — | |
| 31 | 19347 | Kemblesville | — | — | — | |
| 32 | 19351 | Lewisville | — | — | — | |
| 33 | 19353 | Lionville | — | — | — | |
| 34 | 19354 | Lyndell | — | — | — | |
| 35 | 19357 | Mendenhall | — | — | — | |
| 36 | 19358 | Modena | — | — | 4 | $161K |
| 37 | 19360 | New London | — | — | — | |
| 38 | 19366 | Pocopson | — | — | — | |
| 39 | 19367 | Pomeroy | — | — | 4 | — |
| 40 | 19369 | Sadsburyville | — | — | — | |
| 41 | 19371 | Suplee | — | — | — | |
| 42 | 19376 | Wagontown | — | — | — | |
| 43 | 19381 | West Chester | — | — | — | |
| 44 | 19388 | West Chester | — | — | — | |
| 45 | 19395 | Westtown | — | — | — | |
| 46 | 19397 | Southeastern | — | — | — | |
| 47 | 19398 | Southeastern | — | — | — | |
| 48 | 19399 | Southeastern | — | — | — | |
| 49 | 19421 | Birchrunville | — | — | — | |
| 50 | 19432 | Devault | — | — | — | |
| 51 | 19442 | Kimberton | — | — | — | |
| 52 | 19457 | Parker Ford | — | — | 1 | — |
| 53 | 19465 | Pottstown | — | — | 20 (1 health) | $383K |
| 54 | 19470 | Saint Peters | — | — | — | |
| 55 | 19480 | Uwchland | — | — | — | |
| 56 | 19481 | Valley Forge | — | — | — | |
| 57 | 19482 | Valley Forge | — | — | — | |
| 58 | 19493 | Valley Forge | — | — | — | |
| 59 | 19494 | Valley Forge | — | — | — | |
| 60 | 19495 | Valley Forge | — | — | — | |
| 61 | 19496 | Valley Forge | — | — | — | |
| 62 | 19538 | Maxatawny | — | — | $191K |
Recommended Buyer Guides for Chester County
Below: editorial picks, no sponsored placements.
- Best Water Filters for PFAS — PFAS detected in 2 ZIP codes
- 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 Chester County, Pennsylvania
Overview
Chester County in Pennsylvania covers 62 tracked ZIP records with an average Home Safety Score of D (42/100) across 26 scored records.
29 of 32 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 8 health-based violations 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
Chester 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.