D37/100
Hamilton Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 138,186 residents · New Jersey
What's In Hamilton's Tap Water?
69
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
2
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Failed to conduct Level 1 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 22, 2024Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
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, 2023 – April 16, 2024Rule: Ground Water 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
AQUA NJ - BLACKWOOD
Population Served
44,396
Water Source
Purchased Surface Water
System ID
NJ0415002
AQUA NJ - WOOLWICH
Population Served
6,271
Water Source
Purchased Surface Water
System ID
NJ0824001
AQUA NJ - HAMILTON SQUARE
Population Served
39,128
Water Source
Purchased Surface Water
System ID
NJ1103001
AQUA NJ - LAWRENCE
Population Served
8,655
Water Source
Groundwater Under Influence of Surface Water
System ID
NJ1107002
AQUA NJ - EASTERN DIVISION
Population Served
12,000
Water Source
Groundwater
System ID
NJ1505002
AQUA NJ - WALLKILL
Population Served
1,050
Water Source
Groundwater
System ID
NJ1911001
AQUA NJ - PHILLIPSBURG
Population Served
26,686
Water Source
Groundwater Under Influence of Surface Water
System ID
NJ2119001
Frequently Asked Questions About Hamilton Water
Is Hamilton tap water safe to drink?
Hamilton, New Jersey tap water receives a grade of D (37/100), which is considered poor. 3 contaminant(s) exceed EPA maximum contaminant levels and 583 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Hamilton's water?
Of the 70 contaminants tested in Hamilton's water supply, the most notable include PFOA, PFOS, Copper (90th percentile), 1,4-dioxane. 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 Hamilton have any water quality violations?
Yes, Hamilton has 583 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, RPT, TT. 10 of these are health-based violations, which are the most serious category.
Do I need a water filter in Hamilton?
Based on EPA data, using a water filter in Hamilton 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 Hamilton's tap water come from?
Hamilton's drinking water is sourced from purchased surface water and supplied by AQUA NJ - BLACKWOOD and 6 other water system(s). The system serves approximately 138,186 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Hamilton'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. Hamilton'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 Hamilton's water compare to other cities in New Jersey?
Hamilton's water quality score of 37/100 earns a grade of D, which is considered poor. This is a concerning score that suggests significant water quality issues. Visit our New Jersey state page to see how all cities in the state compare.
What should I do if I'm concerned about Hamilton's water quality?
If you have concerns about Hamilton'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 (AQUA NJ - BLACKWOOD) 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.