Data source: EPA SDWIS Last verified: 2026-06-04

Water quality varies significantly across Allentown, PA. We analyzed 9 ZIP codes to help you compare neighborhoods by water safety, lead risk, and EPA compliance.

City Overview: Grade D (48/100)

Grade	Neighborhoods	%
A	0	0%
B	0	0%
C	0	0%
D	9	100%
F	0	0%

Neighborhood Rankings

Every ZIP code in Allentown ranked by Home Safety Score:

Rank	ZIP Code	Score	Grade	Violations	Lead Risk
1	18101	54	D	13	0.0070 mg/L
2	18106	54	D	13	0.0070 mg/L
3	18102	49	D	13	0.0070 mg/L
4	18105	49	D	13	0.0070 mg/L
5	18175	48	D	13	0.0070 mg/L
6	18195	48	D	13	0.0070 mg/L
7	18103	44	D	13	0.0070 mg/L
8	18104	44	D	13	0.0070 mg/L
9	18109	44	D	13	0.0070 mg/L

How Neighborhoods Compare

Each ZIP code compared to county and state averages:

• 2 neighborhoods score better than county average
• 7 neighborhoods score worse than county average

EPA Violations

• 117 total violations across Allentown
• 0 health-based violations
• 9 of 9 ZIP codes have violations
• 0 ZIP codes exceed EPA lead action level

Top Contaminants

Contaminant	Violations	ZIPs
Copper	27	9
Contaminant 0700	27	9
Consumer Confidence Report Rule	18	9
E. coli	18	9
Haloacetic Acids (HAA5)	9	9

Frequently Asked Questions

What is the safest neighborhood in Allentown?

ZIP code 18101 has the highest safety score in Allentown at 54/100 (grade D). Check the full report for details.

Is Allentown water safe to drink?

Allentown has an average water safety score of 48/100 (D). Water quality varies by neighborhood — no ZIP codes currently exceed EPA lead limits. Always check your specific ZIP code.

Related Pages

• Allentown, PA city page
• Pennsylvania state rankings
• All Pennsylvania alerts

Data Sources

• EPA SDWIS
• U.S. Census Bureau

Updated daily.