CITY REPORT
VA
Herndon, VA Water Quality Report
1 ZIP code · 2 water systems · Updated 2026-03-16
Data: EPA SDWIS Last verified: 2026-03-16
1
ZIP Codes
2
Water Systems
0
ZIPs with Violations
Zone 1
Radon Risk (High)
Overview
We track water quality and home safety data for 1 ZIP code in Herndon, Virginia, covering 2 community water systems serving approximately 1,121,613 people.
No EPA violations recorded across any ZIP codes in Herndon — an excellent indicator of water quality.
Water Sources
Herndon water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Herndon
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 20170 | — | FAIRFAX COUNTY WATER AUTHORITY | 1,121,613 |
All ZIP Codes in Herndon
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.