D38/100
YARMOUTH WATER DEPARTMENT — Water Quality Report 2026
Serving 38,900 people · Massachusetts
Water Source
Groundwater
County
—
System ID
MA4351000
Violations
31
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed to conduct Level 1 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 6, 2021Rule: Consumer Confidence RuleEnforcement: Formal — state order issued
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 YARMOUTH WATER DEPARTMENT
Is YARMOUTH WATER DEPARTMENT water safe to drink?
YARMOUTH WATER DEPARTMENT water receives a grade of D (38/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 31 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has YARMOUTH WATER DEPARTMENT detected?
63 contaminants were tested in YARMOUTH WATER DEPARTMENT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does YARMOUTH WATER DEPARTMENT have any EPA violations?
Yes, YARMOUTH WATER DEPARTMENT has 31 EPA violation(s) on record, with the most recent in 2021. Violation types include MR, RPT, TT. 7 are health-based violations.
How many people does YARMOUTH WATER DEPARTMENT serve?
YARMOUTH WATER DEPARTMENT serves approximately 38,900 people, Massachusetts. The system provides water to 1 community: Yarmouth.
What type of water does YARMOUTH WATER DEPARTMENT provide?
YARMOUTH WATER DEPARTMENT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MA4351000.
How does YARMOUTH WATER DEPARTMENT compare to other utilities in Massachusetts?
YARMOUTH WATER DEPARTMENT scores 38/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Massachusetts state page for a full comparison of water systems.