A96/100
CHESTER WATER AUTHORITY — Water Quality Report 2026
Serving 140,437 people · Pennsylvania
Water Source
Surface Water
County
—
System ID
PA1230004
Violations
1
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2011.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About CHESTER WATER AUTHORITY
Is CHESTER WATER AUTHORITY water safe to drink?
CHESTER WATER AUTHORITY water receives a grade of A (96/100), which is considered excellent. Out of 76 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CHESTER WATER AUTHORITY detected?
76 contaminants were tested in CHESTER WATER AUTHORITY's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CHESTER WATER AUTHORITY have any EPA violations?
Yes, CHESTER WATER AUTHORITY has 1 EPA violation(s) on record, with the most recent in 2011. Violation types include MR.
How many people does CHESTER WATER AUTHORITY serve?
CHESTER WATER AUTHORITY serves approximately 140,437 people, Pennsylvania.
What type of water does CHESTER WATER AUTHORITY provide?
CHESTER WATER AUTHORITY sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is PA1230004.
How does CHESTER WATER AUTHORITY compare to other utilities in Pennsylvania?
CHESTER WATER AUTHORITY scores 96/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Pennsylvania state page for a full comparison of water systems.