C40/100
WALTHAM WATER DEPARTMENT — Water Quality Report 2026
Serving 65,218 people · Massachusetts
Water Source
Purchased Surface Water
County
—
System ID
MA3308000
Violations
13
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
No violations in the past 5 years
Full EPA compliance since 2015.
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 WALTHAM WATER DEPARTMENT
Is WALTHAM WATER DEPARTMENT water safe to drink?
WALTHAM WATER DEPARTMENT water receives a grade of C (40/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 13 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has WALTHAM WATER DEPARTMENT detected?
76 contaminants were tested in WALTHAM WATER DEPARTMENT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does WALTHAM WATER DEPARTMENT have any EPA violations?
Yes, WALTHAM WATER DEPARTMENT has 13 EPA violation(s) on record, with the most recent in 2015. Violation types include MR, MCL, TT. 11 are health-based violations.
How many people does WALTHAM WATER DEPARTMENT serve?
WALTHAM WATER DEPARTMENT serves approximately 65,218 people, Massachusetts. The system provides water to 1 community: Waltham.
What type of water does WALTHAM WATER DEPARTMENT provide?
WALTHAM WATER DEPARTMENT sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is MA3308000.
How does WALTHAM WATER DEPARTMENT compare to other utilities in Massachusetts?
WALTHAM WATER DEPARTMENT scores 40/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Massachusetts state page for a full comparison of water systems.