WC
Walworth County Department of Health & Human Services
1910 County Road Nn, Elkhorn, WI
Water testing labs in Walworth County, WI
4 state-accredited water testing labs in Walworth 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 Walworth County, WI
ET
East Troy Wastewater Treatment
2104 Young St, East Troy, WI
Public water system lab. Many don't accept private well samples, so call first.
GC
Genoa City Water Utility
521 1st St, Genoa City, WI
Public water system lab. Many don't accept private well samples, so call first.
LG
Lake Geneva Utility Commission
361 W Main St, Lake Geneva, WI
Public water system lab. Many don't accept private well samples, so call first.
Mail-in labs that ship to Walworth 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.
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Well water guides
Common questions
Where can I test well water near Walworth County, WI?
The state-accredited labs above serve Walworth County, WI. Many offer sample bottles you collect at home.
What should I test for near Walworth County, WI?
Start with total coliform bacteria and nitrates, then ask your county health department about local concerns.