Northampton County, Pennsylvania
29 ZIP codes · Avg score 64/100 · Grade C · Updated
ZipCheckup grade for Northampton County: C.
A mixed picture - some signals here are worth your attention.
Safe water is the norm for most of Northampton County's 29 ZIP codes - but a notable subset have documented violations that push the grade to the middle tier.
How Northampton County Compares
How Northampton County Compares
Northampton County scores 7 points above the Pennsylvania state average (57/100) and 9 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: Northampton 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: $4,119, driven primarily by sea_level
70.4% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
→ Stable trendEPA violation counts by year across Northampton County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 9 violations. Past 5 years: 18 total (18 health-based).
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: $4,119
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
128,038 housing units in Northampton 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 Northampton County
Remediation costs are relatively manageable for most homeowners in Northampton 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 Northampton County
8 community water systems serving Northampton County.
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Show all 8 water systems
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17 total water systems serve Northampton County.
Systems with the most violations in Northampton County
5 water systems with recorded EPA violations.
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All ZIP Codes in Northampton County
29 ZIP codes tracked in Northampton County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 18040 | Easton | 67 | C | 0 | $348K |
| 2 | 18042 | Easton | 67 | C | 0 | $206K |
| 3 | 18072 | Pen Argyl | 67 | C | 0 | $244K |
| 4 | 18083 | Stockertown | 67 | C | 0 | $264K |
| 5 | 18085 | Tatamy | 67 | C | 0 | $275K |
| 6 | 18091 | Wind Gap | 67 | C | 0 | $250K |
| 7 | 18020 | Bethlehem | 66 | C | 3 | $349K |
| 8 | 18045 | Easton | 66 | C | 3 | $301K |
| 9 | 18064 | Nazareth | 66 | C | 3 | $355K |
| 10 | 18014 | Bath | 65 | C | 6 | $278K |
| 11 | 18017 | Bethlehem | 65 | C | 6 | $311K |
| 12 | 18032 | Catasauqua | 63 | C | 12 | $214K |
| 13 | 18067 | Northampton | 63 | C | 9 (1 health) | $265K |
| 14 | 18015 | Bethlehem | 62 | C | 12 (1 health) | $243K |
| 15 | 18055 | Hellertown | 62 | C | 12 (1 health) | $294K |
| 16 | 18013 | Bangor | 57 | C | 29 | $246K |
| 17 | 18343 | Mount Bethel | 57 | C | 29 | $274K |
| 18 | 18002 | Lehigh Valley | — | — | — | |
| 19 | 18003 | Lehigh Valley | — | — | — | |
| 20 | 18016 | Bethlehem | — | — | — | |
| 21 | 18025 | Bethlehem | — | — | — | |
| 22 | 18035 | Cherryville | — | — | — | |
| 23 | 18038 | Danielsville | — | — | 3 (1 health) | $248K |
| 24 | 18043 | Easton | — | — | — | |
| 25 | 18044 | Easton | — | — | — | |
| 26 | 18063 | Martins Creek | — | — | $204K | |
| 27 | 18086 | Treichlers | — | — | $262K | |
| 28 | 18088 | Walnutport | — | — | 60 (5 health) | $241K |
| 29 | 18351 | Portland | — | — | $259K |
Recommended Buyer Guides for Northampton 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 Water Filters for PFAS — PFAS detected in 1 ZIP code
- Best Lead Paint Test Kits — 70.4% 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 Northampton County, Pennsylvania
Overview
Northampton County in Pennsylvania covers 29 tracked ZIP records with an average Home Safety Score of C (64/100) across 17 scored records.
13 of 19 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 6 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.