Tap water in Frederick, MD — ZIP 21703
2 public water systems serving about 128,911 people. PFAS "forever chemicals" have been detected here.
B
Good
PFAS detected: at least one system serving this ZIP reported PFAS in EPA UCMR 5
testing. Levels and the 2024 federal limits are shown per system below.
Water systems serving 21703
New Design - Frederick County
PWSID MD0100030 · serves 74,911 ·
surface water
0 health-based / 2 total violations (5 yrs)
· PFAS up to 3.3 ppt
City Of Frederick
PWSID MD0100015 · serves 54,000 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 3.1 ppt
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology