F0/100
Seabrook Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 14,000 residents · New Hampshire
What's In Seabrook's Tap Water?
67
Contaminants Tested
3
Exceed EPA Limits
1
Above EPA Goals
4 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.48 mg/L | 1.30 mg/L | Over Limit |
PFOS | 0.005 µg/L | 0.004 µg/L | Over Limit |
PFOA | 0.005 µg/L | 0.004 µg/L | Over Limit |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 10, 2025 – January 21, 2025Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 1, 2024 – January 1, 2025Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
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: August 14, 2021 – August 27, 2021Rule: Consumer Confidence RuleEnforcement: Resolving — corrective action underway
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
SEABROOK WATER DEPT
Population Served
14,000
Water Source
Groundwater
System ID
NH2111010
Frequently Asked Questions About Seabrook Water
Is Seabrook tap water safe to drink?
Seabrook, New Hampshire tap water receives a grade of F (0/100), which is considered failing. 3 contaminant(s) exceed EPA maximum contaminant levels and 221 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Seabrook's water?
Of the 67 contaminants tested in Seabrook's water supply, the most notable include PFOS, PFOA, Copper (90th percentile), Lead (90th percentile). 3 contaminant(s) exceed EPA legal limits (MCLs). 4 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Seabrook have any water quality violations?
Yes, Seabrook has 221 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, MON, MR. 29 of these are health-based violations, which are the most serious category.
Do I need a water filter in Seabrook?
Based on EPA data, using a water filter in Seabrook is recommended. 3 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 Seabrook's tap water come from?
Seabrook's drinking water is sourced from groundwater and supplied by SEABROOK WATER DEPT. The system serves approximately 14,000 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Seabrook'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. Seabrook'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 Seabrook's water compare to other cities in New Hampshire?
Seabrook's water quality score of 0/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our New Hampshire state page to see how all cities in the state compare.
What should I do if I'm concerned about Seabrook's water quality?
If you have concerns about Seabrook'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 (SEABROOK WATER DEPT) 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.