CC
C & C Pumps LLC
1480 State Road 83, Hartford, WI
Water testing labs in Washington County, WI
4 state-accredited water testing labs in Washington County, WI.
4 certified labsUpdated October 2026Source: state lab accreditation records
Source: Wisconsin DNR list of labs certified for coliform bacteria testing, list dated Oct 28, 2026. Find a Water Test is independent and not affiliated with the Wisconsin Department of Natural Resources. Certification covers specific tests, so confirm the lab is certified for the ones you need: Verify a certification.
4 certified labs near Washington County, WI
SW
Slinger Water Utility
120 M-B-W Rd, Slinger, WI
Public water system lab. Many don't accept private well samples, so call first.
VJ
Village of Jackson
W194 N16658 Eagle Dr, Jackson, WI
Public water system lab. Many don't accept private well samples, so call first.
VK
Village of Kewaskum
204 1st St, Kewaskum, WI
Public water system lab. Many don't accept private well samples, so call first.
Mail-in labs that ship to Washington County, WI
How mail-in testing worksNT
National Testing Laboratories (WaterCheck)
Ships nationwide
Single tests from $75; well and city packages $165 to $440
Certified in Wisconsin
TS
Tap Score by SimpleLab
Ships nationwide
Single-contaminant kits from about $145; full well and city panels about $300 to $870
Testing service: sends your sample to a partner lab.
Bad result? Get help from water treatment pros near Washington County, WI
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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 Washington County, WI?
The state-accredited labs above serve Washington County, WI. Many offer sample bottles you collect at home.
What should I test for near Washington County, WI?
Start with total coliform bacteria and nitrates, then ask your county health department about local concerns.