F0/100
JERICHO WD — Water Quality Report 2026
Serving 58,000 people · New York
Water Source
Groundwater
County
—
System ID
NY2902831
Violations
97
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
cobalt | 6.10 µg/L | — | Above Goal |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2013.
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 JERICHO WD
Is JERICHO WD water safe to drink?
JERICHO WD water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 97 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has JERICHO WD detected?
73 contaminants were tested in JERICHO WD's water. Notable contaminants include Lead (90th percentile), cobalt. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does JERICHO WD have any EPA violations?
Yes, JERICHO WD has 97 EPA violation(s) on record, with the most recent in 2013. Violation types include MR, MCL. 6 are health-based violations.
How many people does JERICHO WD serve?
JERICHO WD serves approximately 58,000 people, New York. The system provides water to 1 community: Oyster Bay (T).
What type of water does JERICHO WD provide?
JERICHO WD sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is NY2902831.
How does JERICHO WD compare to other utilities in New York?
JERICHO WD scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our New York state page for a full comparison of water systems.