Herndon, VA water quality
Herndon, VA is served by 2 public water systems, serving 1,146,214 people combined. Across those systems, we count 0 health-based violations in the last 5 years. The worst Tap Grade among them is B.
Water systems serving Herndon
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Is Herndon, VA tap water safe to drink?
2 public water systems serve Herndon, VA, with 0 health-based violations in the last 5 years across them. The worst Tap Grade among them is B.
Does Herndon's water have lead in it?
The most recent 90th-percentile lead sample is 1.2 ppb, versus the EPA action level of 15 ppb.
Has PFAS been detected in Herndon's water?
Yes — at least one water system serving Herndon has detected PFAS under UCMR5.
Other cities in Virginia
See all of Virginia →Source: EPA SDWIS/ECHO · Data as of 2026Q2