HE
HP Environmental, Inc.
104 Elden Street, Herndon, VA
Water testing labs in Fairfax County, VA
4 state-accredited water testing labs in Fairfax County, VA.
4 certified labsUpdated October 2026Source: state lab accreditation records
Source: Virginia DCLS list of drinking water laboratories with certification detail, list dated Aug 1, 2026. Find a Water Test is independent and not affiliated with Virginia's Division of Consolidated Laboratory Services (DCLS). Certification covers specific tests, so confirm the lab is certified for the ones you need: Verify a certification.
4 certified labs near Fairfax County, VA
WT
Water Testing Labs of Virginia
9506 Wallingford Drive, Burke, VA
FC
Fairfax County Health Department Joanne Jorgenson Laboratory
10310 Layton Hall Drive, Fairfax, VA
Public water system lab. Many don't accept private well samples, so call first.
FW
Fairfax Water
1295 Fred Morin Road, Herndon, VA
Public water system lab. Many don't accept private well samples, so call first.
Mail-in labs that ship to Fairfax County, VA
How mail-in testing worksNT
National Testing Laboratories (WaterCheck)
Ships nationwide
Single tests from $75; well and city packages $165 to $440
Certified in Virginia
TS
Tap Score by SimpleLab
Ships nationwide
About $189 to $1,125 (city and well kits, Oct 2026)
Testing service: sends your sample to a partner lab.
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Just need a lab? Every certified lab is listed above with directions.
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Well water guides
Common questions
Where can I test well water near Fairfax County, VA?
The state-accredited labs above serve Fairfax County, VA. Many offer sample bottles you collect at home.
What should I test for near Fairfax County, VA?
Start with total coliform bacteria and nitrates, then ask your county health department about local concerns.