B75/100
Mattapoisett Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 37,285 residents · Massachusetts
What's In Mattapoisett's Tap Water?
45
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
No violations in the past 5 years
This system has a clean compliance history.
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
Water Utility Details
MATTAPOISETT WATER DEPARTMENT
Population Served
7,685
Water Source
Groundwater
System ID
MA4173000
MATTAPOISETT RIVER VALLEY W.D.
Population Served
29,600
Water Source
Purchased Groundwater
System ID
MA4173001
Frequently Asked Questions About Mattapoisett Water
Is Mattapoisett tap water safe to drink?
Mattapoisett, Massachusetts tap water receives a grade of B (75/100), which is considered good. Out of 46 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 1 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Mattapoisett's water?
Of the 46 contaminants tested in Mattapoisett's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Mattapoisett have any water quality violations?
Yes, Mattapoisett has 10 EPA violation(s) on record, with the most recent in 2015. Violation types include MCL, MR. 9 of these are health-based violations, which are the most serious category.
Do I need a water filter in Mattapoisett?
Mattapoisett water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.
Where does Mattapoisett's tap water come from?
Mattapoisett's drinking water is sourced from groundwater and supplied by MATTAPOISETT WATER DEPARTMENT and 1 other water system(s). The system serves approximately 37,285 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Mattapoisett's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Mattapoisett's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Mattapoisett's water compare to other cities in Massachusetts?
Mattapoisett's water quality score of 75/100 earns a grade of B, which is considered good. This is an above-average score compared to many cities nationwide. Visit our Massachusetts state page to see how all cities in the state compare.
What should I do if I'm concerned about Mattapoisett's water quality?
If you have concerns about Mattapoisett's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (MATTAPOISETT WATER DEPARTMENT) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.