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WaterSafeCheck

Upper Marlboro, MD Tap Water Quality

Water safety reports for all 5 ZIP codes in Upper Marlboro, Maryland

Average Score

53/100

Health Violations

0

ZIP Codes

5

High Lead Risk

0

of 5 ZIP codes

D

About Tap Water in Upper Marlboro, MD

Tap water quality in Upper Marlboro, MD is a significant concern, currently receiving a below-average safety score of 53/100 across 5 ZIP codes. With 0 health-based violations recorded in the past 5 years, systems like WASHINGTON SUBURBAN SANITARY COMMISSION have struggled to maintain compliance with EPA regulations enforced by Maryland Department of the Environment. Residents are strongly encouraged to utilize certified water filtration systems.

A major factor in Upper Marlboro's high rating is its flawless health-based violation record. Over the past 5 years of EPA tracking, local water systems have recorded zero health-based violations. This means that regulated contaminants—such as lead, arsenic, and harmful bacteria—have not exceeded the Maximum Contaminant Levels (MCLs) allowed by federal law. Drawing primarily from ground water, the city utilizes advanced filtration to maintain this standard.

Fortunately, the modeled risk for widespread lead exposure in Upper Marlboro's municipal water is relatively low compared to national averages. However, because lead typically enters drinking water through the corrosion of older, individual home plumbing rather than the main supply lines, residents in homes built before 1986 should still exercise caution by running the tap before use.

Water Quality by ZIP Code — Upper Marlboro, MD

Click any ZIP code for the full water quality report

C
20774

Upper Marlboro, MD

Score: 55/100✓ No violations
D
20773

Upper Marlboro, MD

Score: 53/100✓ No violations
D
20775

Upper Marlboro, MD

Score: 53/100✓ No violations
D
20792

Upper Marlboro, MD

Score: 53/100✓ No violations
D
20772

Upper Marlboro, MD

Score: 50/100✓ No violations

Frequently Asked Questions — Upper Marlboro Water Quality

Is tap water safe to drink in Upper Marlboro, MD?+
Tap water in Upper Marlboro has a grade of D, indicating compliance concerns in recent years. Families with young children or pregnant women should consider using a certified NSF/ANSI 53 water filter for drinking and cooking.
What is the water quality score for Upper Marlboro?+
The average water quality score across 5 ZIP codes in Upper Marlboro, MD is 53/100. 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 Upper Marlboro have lead in its tap water?+
Lead risk ratings in Upper Marlboro are relatively low based on EPA monitoring data. However, lead in home plumbing is a separate concern — if your home was built before 1986, individual tap testing is recommended.
How do I get the water quality report for Upper Marlboro?+
Each ZIP code in Upper Marlboro 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 Upper Marlboro's tap water come from?+
Tap water in Upper Marlboro, MD 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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