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Fairfax County Water Authority

Published drinking-water records and contacts for Fairfax County Water Authority. System VA6059501. Review sources and dates; not a real-time water assessment.

System ID
VA6059501
State or territory
VA
Published population served
1121613
System type (source code)
CWS

Published records and dates

Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.

Read the provider’s annual water quality report

Report link listed: 2026-09-19. This is not the report’s sampling date.

Published testing results

Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.

“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example

EPA UCMR 5 — most recent imported sample per substance
SubstancePublished resultReporting limitSample dateSampling location
11Cl-PF3OUdS< 0.005 µg/L0.005 µg/L2025-02-13Corbalis WTP / EP002
4:2 FTS< 0.003 µg/L0.003 µg/L2025-02-13Corbalis WTP / EP002
6:2 FTS< 0.005 µg/L0.005 µg/L2025-02-13CHAIN BRIDGE ENTRY POINT / EP401
8:2 FTS< 0.005 µg/L0.005 µg/L2025-02-13CHAIN BRIDGE ENTRY POINT / EP401
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2025-02-13Corbalis WTP / EP002
ADONA< 0.003 µg/L0.003 µg/L2025-02-13CHAIN BRIDGE ENTRY POINT / EP401
HFPO-DA< 0.005 µg/L0.005 µg/L2025-02-13Corbalis WTP / EP003
NEtFOSAA< 0.005 µg/L0.005 µg/L2024-12-17Corbalis WTP / EP001
NFDHA< 0.02 µg/L0.02 µg/L2025-02-13CHAIN BRIDGE ENTRY POINT / EP401
NMeFOSAA< 0.006 µg/L0.006 µg/L2024-12-17Corbalis WTP / EP001
PFBA< 0.005 µg/L0.005 µg/L2025-02-13Corbalis WTP / EP004
PFBS< 0.003 µg/L0.003 µg/L2025-02-13Corbalis WTP / EP001
PFDA< 0.003 µg/L0.003 µg/L2025-02-13Corbalis WTP / EP003
PFDoA< 0.003 µg/L0.003 µg/L2025-02-13Corbalis WTP / EP003
PFEESA< 0.003 µg/L0.003 µg/L2025-02-13Corbalis WTP / EP002
PFHpA< 0.003 µg/L0.003 µg/L2025-02-13CHAIN BRIDGE ENTRY POINT / EP401
PFHpS< 0.003 µg/L0.003 µg/L2025-02-13Corbalis WTP / EP001
PFHxA< 0.003 µg/L0.003 µg/L2025-02-13Corbalis WTP / EP001
PFHxS< 0.003 µg/L0.003 µg/L2025-02-13Corbalis WTP / EP004
PFMBA< 0.003 µg/L0.003 µg/L2025-02-13CHAIN BRIDGE ENTRY POINT / EP401
PFMPA< 0.004 µg/L0.004 µg/L2025-02-13Corbalis WTP / EP004
PFNA< 0.004 µg/L0.004 µg/L2025-02-13CHAIN BRIDGE ENTRY POINT / EP401
PFOA< 0.004 µg/L0.004 µg/L2025-02-13Corbalis WTP / EP003
PFOS< 0.004 µg/L0.004 µg/L2025-02-13Corbalis WTP / EP001
PFPeA< 0.003 µg/L0.003 µg/L2025-02-13Corbalis WTP / EP002
PFPeS< 0.004 µg/L0.004 µg/L2025-02-13Corbalis WTP / EP002
PFTA< 0.008 µg/L0.008 µg/L2024-12-17Corbalis WTP / EP003
PFTrDA< 0.007 µg/L0.007 µg/L2024-12-17Corbalis WTP / EP003
PFUnA< 0.002 µg/L0.002 µg/L2025-02-13Corbalis WTP / EP004
lithium< 9 µg/L9 µg/L2024-12-17Corbalis WTP / EP003

Download all EPA UCMR 5 records (CSV)

Lead and copper: 90th-percentile summaries

These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile

Eight most recent imported monitoring summaries
SubstancePublished 90th percentileMonitoring periodSource quarter
Lead (PB90) 0.0012 mg/L2021-01-01 – 2023-12-312026Q3
Lead (PB90) 0.001 mg/L2018-01-01 – 2020-12-312026Q3
Lead (PB90) 0.00063 mg/L2015-01-01 – 2017-12-312026Q3
Lead (PB90) 0.00078 mg/L2012-01-01 – 2014-12-312026Q3
Lead (PB90) 0.0008 mg/L2009-01-01 – 2011-12-312026Q3
Lead (PB90) 0.001 mg/L2007-07-01 – 2007-12-312026Q3
Lead (PB90) 0.0013 mg/L2007-01-01 – 2007-06-302026Q3
Lead (PB90) 0.001 mg/L2003-01-01 – 2005-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
PFBABelow a limit; numeric threshold unavailable ng/L2023-10-12EP022 / Virginia ODW PFAS studies — Phases 1–3
PFDoABelow a limit; numeric threshold unavailable ng/L2023-10-12EP022 / Virginia ODW PFAS studies — Phases 1–3
PFPeSBelow a limit; numeric threshold unavailable ng/L2023-10-12EP022 / Virginia ODW PFAS studies — Phases 1–3
PFHxABelow a limit; numeric threshold unavailable ng/L2023-10-12EP022 / Virginia ODW PFAS studies — Phases 1–3
PFNABelow a limit; numeric threshold unavailable ng/L2023-10-12EP022 / Virginia ODW PFAS studies — Phases 1–3
PFMBABelow a limit; numeric threshold unavailable ng/L2023-10-12EP022 / Virginia ODW PFAS studies — Phases 1–3
PFMPABelow a limit; numeric threshold unavailable ng/L2023-10-12EP022 / Virginia ODW PFAS studies — Phases 1–3
6:2 FTSBelow a limit; numeric threshold unavailable ng/L2023-10-12EP022 / Virginia ODW PFAS studies — Phases 1–3
PFOA0.30 J ng/L2023-10-12EP022 / Virginia ODW PFAS studies — Phases 1–3
PFEESABelow a limit; numeric threshold unavailable ng/L2023-10-12EP022 / Virginia ODW PFAS studies — Phases 1–3
PFUnABelow a limit; numeric threshold unavailable ng/L2023-10-12EP022 / Virginia ODW PFAS studies — Phases 1–3
4:2 FTSBelow a limit; numeric threshold unavailable ng/L2023-10-12EP022 / Virginia ODW PFAS studies — Phases 1–3

State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.

Download state records with source notes (CSV)

Published compliance history

0 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.

Source dates and refresh checks

A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.

Administrative contact (EPA filing)

Siminari, Michele: 703-289-6568

An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.

Official state resources · How to read these records