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WaterSafeCheck

Frederick, MD Tap Water Quality

Water safety reports for all 6 ZIP codes in Frederick, Maryland

Average Score

64/100

Health Violations

6

ZIP Codes

6

High Lead Risk

1

of 6 ZIP codes

C

About Tap Water in Frederick, MD

Water quality in Frederick, MD is currently rated with a moderate C grade (average score: 64/100 across 6 ZIP codes). This rating indicates that while the water provided by New Design - Frederick County is treated and regulated, there have been notable compliance issues or contaminant detections recently. Residents should stay informed about the specific challenges affecting their local supply.

The accumulation of 6 health-based violations over the past 5 years highlights systemic challenges within Frederick's water infrastructure. When violations occur, it means that drinking water tests revealed contaminant levels exceeding safe limits, triggering mandatory corrective actions by Maryland Department of the Environment. The city relies on surface water, which may require significant treatment upgrades to address these recurring issues.

Additionally, lead exposure risk remains a critical issue for certain neighborhoods. EPA data indicates that 1 out of 6 ZIP codes in Frederick 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 Frederick 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 Frederick

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

Haloacetic Acids (HAA5)

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 — Frederick, MD

Click any ZIP code for the full water quality report

C
21704

Frederick, MD

Score: 69/1001 violation
C
21705

Frederick, MD

Score: 65/1001 violation
C
21709

Frederick, MD

Score: 65/1001 violation
C
21702

Frederick, MD

Score: 64/1001 violation
C
21703

Frederick, MD

Score: 64/1001 violation
C
21701

Frederick, MD

Score: 59/1001 violation

Frequently Asked Questions — Frederick Water Quality

Is tap water safe to drink in Frederick, MD?+
Tap water in Frederick has a grade of C, 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 Frederick?+
The average water quality score across 6 ZIP codes in Frederick, MD is 64/100. 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 Frederick have lead in its tap water?+
1 out of 6 ZIP codes in Frederick 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 Frederick?+
Each ZIP code in Frederick 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 Frederick's tap water come from?+
Tap water in Frederick, MD primarily comes from surface water. Surface water systems treat water from rivers, lakes, or reservoirs using filtration, sedimentation, and disinfection before it reaches your tap.

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