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WaterSafeCheck

Marlborough, CT Tap Water Quality

Water safety reports for all 1 ZIP code in Marlborough, Connecticut

Average Score

91/100

Health Violations

1

ZIP Codes

1

High Lead Risk

1

of 1 ZIP codes

A

About Tap Water in Marlborough, CT

Tap water in Marlborough, CT ranks among the best in the state, maintaining a remarkable average water quality score of 91/100 across its 1 ZIP code. Based on recent EPA Safe Drinking Water Act compliance records, water provided by Aquarion-marlborough and other municipal suppliers has consistently met or exceeded federal safety standards. This top-tier "A" grade reflects strong infrastructure, diligent monitoring by Connecticut Department of Public Health, and low contaminant levels.

Over the past 5 years, Marlborough has recorded 1 health-based violation. While occasional violations can occur due to seasonal changes or temporary infrastructure issues, Aquarion-marlborough is legally required to resolve these quickly and notify the public via their annual Consumer Confidence Report. The city's water supply, primarily drawn from ground water, is treated to address these specific contaminants.

Additionally, lead exposure risk remains a critical issue for certain neighborhoods. EPA data indicates that 1 out of 1 ZIP codes in Marlborough are rated as High or Very High risk for lead. This risk is often driven by aging homes with pre-1986 plumbing containing lead solder or service lines. Families in these areas should test their tap water and consider NSF/ANSI 53 certified filters.

⚠ Lead Risk Alert: Some ZIP codes in Marlborough are rated High or Very High for lead exposure risk based on EPA data. Search your specific ZIP code for a detailed lead level report.

Health-Based Contaminant Violations in Marlborough

EPA records indicate that the following contaminants have exceeded Safe Drinking Water Act Maximum Contaminant Levels (MCLs) in Marlborough water systems over the past 5 years.

Stage 2 DBP Rule

Note: The presence of a past violation does not necessarily mean current water is unsafe. Utilities are required to take corrective action. Review your Consumer Confidence Report for the latest status.

Water Quality by ZIP Code — Marlborough, CT

Click any ZIP code for the full water quality report

A
06447

Marlborough, CT

Score: 91/1001 violation

Frequently Asked Questions — Marlborough Water Quality

Is tap water safe to drink in Marlborough, CT?+
Yes — tap water in Marlborough meets all federal EPA standards and earns a A grade. It is generally safe for healthy adults. As always, running your tap for 30 seconds before use and using a filter adds extra protection for vulnerable populations.
What is the water quality score for Marlborough?+
The average water quality score across 1 ZIP code in Marlborough, CT is 91/100. Scores are derived from EPA violation history, lead levels, enforcement actions, and infrastructure risk indicators. Individual ZIP codes may vary — search your specific ZIP above for a personalized report.
Does Marlborough have lead in its tap water?+
1 out of 1 ZIP codes in Marlborough are rated High or Very High for lead exposure risk. Older homes built before 1986 may have lead service lines or plumbing fixtures. Residents should run their tap for 30 seconds before use and consider a certified NSF/ANSI 53 lead filter.
How do I get the water quality report for Marlborough?+
Each ZIP code in Marlborough has a full water quality report on this site — click any ZIP code below. You can also get the annual Consumer Confidence Report (CCR) from your local water utility. The CCR is required to be published every year by July 1 and contains actual contaminant measurements and violation history.
Where does Marlborough's tap water come from?+
Tap water in Marlborough, CT primarily comes from ground water. Groundwater systems pump water from underground aquifers, which is naturally filtered through soil and rock but can still contain naturally occurring contaminants.

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