Water Quality in 20146 — Ashburn, VA
EPA data for LOUDOUN WATER - CENTRAL SYSTEM
Data source: U.S. Environmental Protection Agency (EPA) SDWIS Last verified: March 16, 2026
Your Water System
ZIP code 20146 in Ashburn, Virginia is served by LOUDOUN WATER - CENTRAL SYSTEM (EPA ID: VA6107350). This system provides water to approximately 334,808 people from surface water sources.
Lead & Copper in Your Water
No Lead & Copper Rule sampling data available for systems serving this ZIP code.
Violation Summary
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| October 1, 2023 | Stage 1 DBP Rule | Monitoring | Resolved |
| October 1, 2023 | Stage 1 DBP Rule | Monitoring | Resolved |
| October 1, 2023 | Stage 1 DBP Rule | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for water systems serving this ZIP code:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Stage 1 DBP Rule | Treatment Technique | 3 | No |
Need help with your water quality?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
What You Can Do
- Review your annual Consumer Confidence Report (CCR) — Your utility publishes this each July
- Test your home’s water — Especially if you have older plumbing (pre-1986) that may contain lead
- Stay informed — Bookmark this page to check for updates on your water quality
Need help with water testing or filtration?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Other Water Quality Reports in Virginia
- 20108 (Manassas) — 2 violations
- 20117 (Middleburg) — 5 violations
- 20132 (Purcellville)
- 20141 (Round Hill)
- 20170 (Herndon)
- 20175 (Leesburg)
- 20186 (Warrenton)
- 22180 (Vienna)
- 22191 (Woodbridge)
- 22201 (Arlington) — 3 violations
- 22301 (Alexandria)
- 22401 (Fredericksburg)
- 22554 (Stafford)
- 22601 (Winchester) — 5 violations
- 22801 (Harrisonburg) — 2 violations
- 22901 (Charlottesville) — 5 violations
- 23058 (Glen Allen) — 9 violations
- 23075 (Henrico)
- 23185 (Williamsburg) — 5 violations
- 23218 (Richmond) — 13 violations
Nearby Water Quality Reports
- 20175 (Leesburg) — 4 mi
- 20132 (Purcellville) — 6 mi
- 20141 (Round Hill) — 8 mi
- 20117 (Middleburg) — 9 mi — 5 violations
- 20170 (Herndon) — 16 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for LOUDOUN WATER - CENTRAL SYSTEM (VA6107350) on EPA.gov.
Frequently Asked Questions
Is the tap water in 20146 safe to drink?
Based on EPA records, the water system serving ZIP code 20146 has only monitoring/reporting violations, which are procedural in nature. However, individual home conditions (old pipes, well water) can affect quality.
Where does 20146’s water come from?
The primary water source for this area is surface water. LOUDOUN WATER - CENTRAL SYSTEM serves approximately 334,808 people.
How can I get my water tested?
Contact your local water utility for a free water quality report, or hire a certified lab for independent home water testing. The EPA recommends testing annually if you use a private well.
Does 20146 have lead in the water?
No Lead and Copper Rule sampling data is currently available in EPA records for water systems serving ZIP code 20146. If you are concerned about lead, contact your water utility or have your tap water independently tested.
What is the radon risk in 20146?
Radon zone data is not available for ZIP code 20146. The EPA recommends testing all homes for radon regardless of location, as radon levels can vary significantly even within the same neighborhood.