F12/100
South Grafton Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 3,262 residents · Massachusetts
What's In South Grafton's Tap Water?
2
Contaminants Tested
1
Exceed EPA Limits
0
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.45 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
3
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: June 1, 2025Rule: Ground Water RuleEnforcement: Formal — state order issued
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024Enforcement: Formal — state order issued
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 30, 2022 – July 11, 2023Rule: Ground Water 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
Water Utility Details
SOUTH GRAFTON WATER DISTRICT
Population Served
3,262
Water Source
Groundwater Under Influence of Surface Water
System ID
MA2110001
Frequently Asked Questions About South Grafton Water
Is South Grafton tap water safe to drink?
South Grafton, Massachusetts tap water receives a grade of F (12/100), which is considered failing. 1 contaminant(s) exceed EPA maximum contaminant levels and 20 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in South Grafton's water?
Of the 2 contaminants tested in South Grafton's water supply, the most notable include Copper (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does South Grafton have any water quality violations?
Yes, South Grafton has 20 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, Other, MCL. 15 of these are health-based violations, which are the most serious category.
Do I need a water filter in South Grafton?
Based on EPA data, using a water filter in South Grafton is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does South Grafton's tap water come from?
South Grafton's drinking water is sourced from groundwater under influence of surface water and supplied by SOUTH GRAFTON WATER DISTRICT. The system serves approximately 3,262 people. Surface water sources include rivers, lakes, and reservoirs.
How often is South Grafton'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. South Grafton'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 South Grafton's water compare to other cities in Massachusetts?
South Grafton's water quality score of 12/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our Massachusetts state page to see how all cities in the state compare.
What should I do if I'm concerned about South Grafton's water quality?
If you have concerns about South Grafton'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 (SOUTH GRAFTON WATER DISTRICT) 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.