69 Certified Water Testing Labs in Wisconsin

69 laboratories from Wisconsin Department of Natural Resources (chemistry) and Department of Agriculture, Trade, & Consumer Protection (microbiology)'s certified-laboratory list, 52 of them located in Wisconsin. Compare the ones near you on phone number, certificate number and certified scope before you send a sample.

52 certified laboratories located in Wisconsin

Across 46 cities. Closest is usually cheapest: most labs need the sample within 24-30 hours of collection, and courier or overnight shipping is billed on top of the test.

Appleton, Wisconsin (1)

Clean Water Testing LLC

Appleton, WI

(920) 733-7590

Certificate 445126660

Alkalinity - SM 2320BAntimony - SM 3113BArsenic - SM 3113BBarium - EPA 200.7Beryllium - EPA 200.7Cadmium - EPA 200.7+15 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Balsam Lake, Wisconsin (1)

Polk County Health Department

Balsam Lake, WI

(715) 768-9117

Certificate 649023980

Nitrate - Hach Method 10206Nitrate + Nitrite - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Baraboo, Wisconsin (1)

CT Laboratories

Baraboo, WI

(608) 356-2760

Certificate 157066030

## THM (group) - EPA 524.2## VOCS, REGULATED (group) - EPA 524.2## VOCS, UNREGULATED (group) - EPA 524.2Alkalinity - SM 2320BAntimony - EPA 200.9Arsenic - EPA 200.9+25 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Black River Falls, Wisconsin (1)

Jackson County Public Health Water Lab

Black River Falls, WI

(715) 284-4301

Certificate 627062810

Nitrate - Hach Method 10206Nitrate + Nitrite - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Colfax, Wisconsin (1)

Commercial Testing Laboratory Inc.

Colfax, WI

(715) 962-3121

Certificate 617013980

Arsenic - EPA 200.9Barium - EPA 200.7Beryllium - EPA 200.7Cadmium - EPA 200.9Chromium - EPA 200.7Copper - EPA 200.7+9 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Crandon, Wisconsin (1)

Northern Lake Service Inc. (Crandon)

Crandon, WI

(715) 478-2777

Certificate 721026460

## HALOACETIC ACIDS (5) - EPA 552.3## PFAS (group) – EPA 537.1 (18)## THM (group) - EPA 524.2## VOCS, REGULATED (group) - EPA 524.2## VOCS, UNREGULATED (group) - EPA 524.23-Hydroxycarbofuran - EPA 531.1+75 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Darlington, Wisconsin (1)

Lafayette County Health Department

Darlington, WI

(608) 776-4895

Certificate 133027840

Nitrate - Hach Method 10206Nitrate + Nitrite - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Deerbrook, Wisconsin (1)

Lab-Tech Services

Deerbrook, WI

(715) 623-6281

Certificate 734044960

Nitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Eau Claire, Wisconsin (1)

Eau Claire City-County Health Department

Eau Claire, WI

(715) 839-2870

Certificate 618019820

Aluminum - EPA 200.8Antimony - EPA 200.8Arsenic - EPA 200.8Barium - EPA 200.8Beryllium - EPA 200.8Cadmium - EPA 200.8+12 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Elkhorn, Wisconsin (1)

Walworth Co. Health & Human Services

Elkhorn, WI

(262) 741-3200

Certificate 265192290

Nitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Fredonia, Wisconsin (1)

Fredonia Wastewater Treatment Plant

Fredonia, WI

(262) 483-0275

Certificate 246002900

Nitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Green Bay, Wisconsin (2)

Brown County Public Health Department

Green Bay, WI

(920) 448-6400

Certificate 405200070

Nitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Pace Analytical Services,LLC-Green Bay WI

Green Bay, WI

(920) 469-2436

Certificate 405132750

Nitrate - EPA 300.0Nitrate + Nitrite - EPA 300.0Nitrite - EPA 300.0

Listed in dnr.wisconsin.gov, read 2026-09-20

Greenleaf, Wisconsin (1)

Branch River Testing Services LLC

Greenleaf, WI

(920) 532-0016

Certificate 405224600

Arsenic - SM 3113BNitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Greenville, Wisconsin (1)

TG Analytical Laboratories

Greenville, WI

(920) 757-1355

Certificate 445158340

Aluminum - EPA 200.8Antimony - EPA 200.8Arsenic - EPA 200.8Arsenic - SM 3113BBarium - EPA 200.8Beryllium - EPA 200.8+17 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Hurley, Wisconsin (1)

Iron County Health Department

Hurley, WI

(715) 561-2191

Certificate 826005950

Nitrate - Hach Method 10206Nitrate + Nitrite - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Janesville, Wisconsin (1)

Rock County Health Department

Janesville, WI

(608) 757-5441

Certificate 154077660

Nitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Kenosha, Wisconsin (2)

Kenosha County Division of Health Lab

Kenosha, WI

(262) 605-6705

Certificate 230153220

Nitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Kenosha Water Utility - WPC

Kenosha, WI

(262) 653-4335

Certificate 230002960

Lead - SM 3113B

Listed in dnr.wisconsin.gov, read 2026-09-20

Kewaunee, Wisconsin (1)

White Water Associates, Inc. - Wisconsin

Kewaunee, WI

(920) 388-9067

Certificate 431018940

Nitrate - Hach Method 10206Nitrate + Nitrite - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Kohler, Wisconsin (1)

Kohler Co., CHEM Lab

Kohler, WI

(920) 457-4441

Certificate 460032870

Antimony - EPA 200.8Arsenic - EPA 200.8Barium - EPA 200.8Beryllium - EPA 200.8Cadmium - EPA 200.8Chloride - EPA 300.0+15 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

La Crosse, Wisconsin (1)

Davy Laboratories

La Crosse, WI

(608) 782-3130

Certificate 632021390

## HALOACETIC ACIDS (5) - EPA 552.2## THM (group) - EPA 524.2## VOCS, REGULATED (group) - EPA 524.22,4-D - EPA 515.3Alkalinity - SM 2320BAluminum - EPA 200.7+56 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

LaCrosse, Wisconsin (1)

La Crosse County HD Public Health Laboratory

LaCrosse, WI

(608) 785-9733

Certificate 632072980

Arsenic - SM 3113BLead - SM 3113BNitrate - Hach Method 10206Nitrate - SM 4500-NO3 DNitrate + Nitrite - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Lancaster, Wisconsin (1)

LV Labs WW, LLC

Lancaster, WI

(608) 723-4096

Certificate 122046870

Nitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Luxemburg, Wisconsin (1)

Analytichem LLC

Luxemburg, WI

(920) 866-3944

Certificate 431011680

Chloride - EPA 300.0Fluoride - EPA 300.0Nitrate - EPA 300.0Nitrate + Nitrite - EPA 300.0Nitrite - EPA 300.0Orthophosphate - EPA 300.0+1 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Madison, Wisconsin (1)

Wisconsin State Laboratory of Hygiene

Madison, WI

(800) 442-4618

Certificate 113133790

## HALOACETIC ACIDS (5) - EPA 552.3## PFAS (group) – EPA 537.1 (18)## THM (group) - EPA 524.3## VOCS, REGULATED (group) - EPA 524.3## VOCS, UNREGULATED (group) - EPA 524.3Alkalinity - SM 2320B+28 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Marshfield, Wisconsin (1)

AgSource Laboratories

Marshfield, WI

(715) 898-1402

Certificate 737109450

Alkalinity - SM 2320BAntimony - EPA 200.8Arsenic - EPA 200.8Barium - EPA 200.8Beryllium - EPA 200.8Cadmium - EPA 200.8+11 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Medford, Wisconsin (1)

Medford Wastewater Treatment Plant

Medford, WI

(715) 748-4122

Certificate 861008830

Nitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Menomonie, Wisconsin (1)

Dunn County Health Department

Menomonie, WI

(715) 232-2388

Certificate 617074700

Nitrate - Hach Method 10206Nitrate + Nitrite - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Mequon, Wisconsin (2)

Metiri - Mequon

Mequon, WI

(262) 539-2316

Certificate 246179890

Nitrate - SM 4500-NO3 D

Listed in dnr.wisconsin.gov, read 2026-09-20

Water Diagnostics Laboratories

Mequon, WI

(414) 350-1100

Certificate 246103990

Nitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Merrill, Wisconsin (1)

Lincoln County Health Department

Merrill, WI

(715) 536-0307

Certificate 735036280

Nitrate - Hach Method 10206Nitrate + Nitrite - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Milwaukee, Wisconsin (2)

City of Milwaukee Health Department Lab

Milwaukee, WI

(414) 286-3526

Certificate 241311290

Lead - SM 3113B

Listed in dnr.wisconsin.gov, read 2026-09-20

Milwaukee Water Works

Milwaukee, WI

(414) 286-2226

Certificate 241010000

Alkalinity - SM 2320BBromate - EPA 300.1Chlorate - EPA 300.1Chloride - EPA 300.1Chlorine, Combined - SM 4500-Cl DChlorine, Combined - SM 4500-Cl G+13 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Neenah, Wisconsin (1)

Badger Laboratories, Inc.

Neenah, WI

(920) 729-1100

Certificate 445023150

Alkalinity - SM 2320BAluminum - EPA 200.7Aluminum - EPA 200.8Antimony - EPA 200.8Arsenic - EPA 200.8Barium - EPA 200.7+36 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

New Berlin, Wisconsin (1)

Eurofins S-F Analytical Laboratories Inc.

New Berlin, WI

(262) 754-5300

Certificate 241249360

Arsenic - EPA 200.8Copper - EPA 200.8Lead - EPA 200.8Nitrate - EPA 300.0Nitrate + Nitrite - EPA 300.0Nitrite - EPA 300.0

Listed in dnr.wisconsin.gov, read 2026-09-20

Oshkosh, Wisconsin (1)

UW-Oshkosh Env. Research & Innovation Ctr

Oshkosh, WI

(920) 424-3148

Certificate 471183460

Arsenic - SM 3113BNitrate - SM 4500-NO3 FNitrate + Nitrite - SM 4500-NO3 FNitrite - SM 4500-NO3 F

Listed in dnr.wisconsin.gov, read 2026-09-20

Randolph, Wisconsin (1)

SWD Labs, LLC

Randolph, WI

(920) 326-5193

Certificate 111083830

Nitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Somerset, Wisconsin (1)

Quality Water Testing, Inc.

Somerset, WI

(715) 247-4873

Certificate 656111390

Nitrate - SM 4500-NO3 D

Listed in dnr.wisconsin.gov, read 2026-09-20

Stevens Point, Wisconsin (2)

Badger Laboratories - Stevens Point

Stevens Point, WI

(715) 544-4900

Certificate 750110460

## THM (group) - EPA 524.3## VOCS, REGULATED (group) - EPA 524.3## VOCS, UNREGULATED (group) - EPA 524.3

Listed in dnr.wisconsin.gov, read 2026-09-20

UWSP Water and Environmental Analysis Lab

Stevens Point, WI

(715) 346-3209

Certificate 750040280

Nitrate + Nitrite - SM 4500-NO3 F

Listed in dnr.wisconsin.gov, read 2026-09-20

Superior, Wisconsin (1)

Douglas County HHS Laboratory

Superior, WI

(715) 395-1438

Certificate 816006730

Nitrate - Hach Method 10206Nitrate + Nitrite - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Viroqua, Wisconsin (1)

Vernon County Health Department

Viroqua, WI

(608) 637-5251

Certificate 663058110

Nitrate - Hach Method 10206Nitrate + Nitrite - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Washburn, Wisconsin (1)

Bayfield County Health Dept.

Washburn, WI

(715) 373-6109

Certificate 804075250

Nitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Watertown, Wisconsin (1)

Watertown Department of Public Health Laboratory

Watertown, WI

(920) 262-8090

Certificate 128099730

Nitrate + Nitrite - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Waukesha, Wisconsin (2)

Northern Lake Service Inc. - Waukesha

Waukesha, WI

(262) 547-3406

Certificate 268533760

Chloride - EPA 300.0Fluoride - EPA 300.0Nitrate - EPA 300.0Nitrate + Nitrite - EPA 300.0Nitrite - EPA 300.0Sulfate - EPA 300.0

Listed in dnr.wisconsin.gov, read 2026-09-20

Waukesha Co Dept of Parks & Land Use – DEH

Waukesha, WI

(262) 896-8300

Certificate 268511760

Nitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Waupaca, Wisconsin (1)

Waupaca County Environmental Microbiology Laboratory

Waupaca, WI

(715) 258-6323

Certificate 469100500

Nitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Wausau, Wisconsin (1)

Marathon County Public Health Laboratory

Wausau, WI

(715) 261-1908

Certificate 737157080

Nitrate - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

West Salem, Wisconsin (1)

A1 Advanced Pumping Service, Inc.

West Salem, WI

(608) 784-1888

Certificate 998018010

Nitrate - Hach Method 10206Nitrate + Nitrite - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

Weston, Wisconsin (1)

U.S. Water, LLC

Weston, WI

(715) 842-2215

Certificate 737240900

Aluminum - EPA 200.8Antimony - EPA 200.8Arsenic - EPA 200.8Barium - EPA 200.8Beryllium - EPA 200.8Cadmium - EPA 200.8+13 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Wisconsin Rapids, Wisconsin (1)

Wood County Water Laboratory

Wisconsin Rapids, WI

(715) 421-8911

Certificate 772162820

Nitrate - Hach Method 10206Nitrate + Nitrite - Hach Method 10206

Listed in dnr.wisconsin.gov, read 2026-09-20

17 more Wisconsin-certified laboratories located in another state

Wisconsin certifies these laboratories, but they are not in Wisconsin. They mail you a kit and you ship the sample back, so turnaround includes transit both ways.

APPL, LLC

Clovis, CA

(559) 275-2175

Certificate 399154470

## PFAS (group) - EPA 533 (25)## PFAS (group) – EPA 537.1 (18)

Listed in dnr.wisconsin.gov, read 2026-09-20

Enthalpy Analytical LLC

El Dorado Hills, CA

(916) 673-1520

Certificate 998036160

## PFAS (group) - EPA 533 (25)## PFAS (group) – EPA 537.1 (18)

Listed in dnr.wisconsin.gov, read 2026-09-20

Eurofins Sacramento

West Sacramento, CA

(916) 373-5600

Certificate 998204680

## PFAS (group) – EPA 537.1 (18)2,3,7,8-TCDD (Dioxin) - EPA 1613

Listed in dnr.wisconsin.gov, read 2026-09-20

SGS North America, Inc. - Orlando

Orlando, FL

(407) 425-6700

Certificate 399043370

## PFAS (group) – EPA 537.1 (18)

Listed in dnr.wisconsin.gov, read 2026-09-20

Pace Analytical Services,LLC-Ormond Beach FL

Ormond Beach, FL

(386) 672-5668

Certificate 399079670

## HALOACETIC ACIDS (5) - EPA 552.3## PFAS (group) – EPA 537.1 (18)## THM (group) - EPA 524.2## VOCS, REGULATED (group) - EPA 524.2## VOCS, UNREGULATED (group) - EPA 524.22,4-D - EPA 515.3+35 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Sterling Labs

Des Plaines, IL

(847) 967-6666

Certificate 999888890

Antimony - EPA 200.8Barium - EPA 200.8Beryllium - EPA 200.8Cadmium - EPA 200.8Chromium - EPA 200.8Copper - EPA 200.8+3 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Metiri - Geneva

Geneva, IL

(708) 544-3260

Certificate 399089350

## HALOACETIC ACIDS (5) - EPA 552.3## THM (group) - EPA 524.2## VOCS, REGULATED (group) - EPA 524.2## VOCS, UNREGULATED (group) - EPA 524.22,4-D - EPA 515.43-Hydroxycarbofuran - EPA 531.2+67 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Culligan Analytical Laboratory

Rosemont, IL

(847) 430-1219

Certificate 399016200

Alkalinity - SM 2320BAluminum - EPA 200.7Aluminum - EPA 200.8Antimony - EPA 200.8Arsenic - EPA 200.8Barium - EPA 200.7+22 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Pace Analytical Services,LLC-Indianapolis IN

Indianapolis, IN

(317) 228-3100

Certificate 999788130

Antimony - EPA 200.8Arsenic - EPA 200.8Barium - EPA 200.7Barium - EPA 200.8Beryllium - EPA 200.7Beryllium - EPA 200.8+13 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Eurofins Eaton Analytical, LLC - Indiana

South Bend, IN

(574) 233-4777

Certificate 999766900

## HALOACETIC ACIDS (5) - EPA 552.2## PFAS (group) - EPA 533 (25)## PFAS (group) – EPA 537.1 (18)## THM (group) - EPA 524.2## THM (group) - EPA 524.3## VOCS, REGULATED (group) - EPA 524.2+92 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Merit Laboratories, Inc

East Lansing, MI

(517) 332-0167

Certificate 399147320

## PFAS (group) – EPA 537.1 (18)

Listed in dnr.wisconsin.gov, read 2026-09-20

ALS Environmental - Holland

Holland, MI

(616) 399-6070

Certificate 399084510

## PFAS (group) – EPA 537.1 (18)

Listed in dnr.wisconsin.gov, read 2026-09-20

National Testing Laboratories, Inc.

Ypsilanti, MI

(734) 483-8333

Certificate 999462860

## HALOACETIC ACIDS (5) - EPA 552.2## THM (group) - EPA 524.2## VOCS, REGULATED (group) - EPA 524.2## VOCS, UNREGULATED (group) - EPA 524.22,4-D - EPA 515.43-Hydroxycarbofuran - EPA 531.2+101 more in the source list

Listed in dnr.wisconsin.gov, read 2026-09-20

Pace Analytical Services,LLC-Duluth MN

Duluth, MN

(218) 735-6700

Certificate 999446800

Chloride - EPA 300.0Fluoride - EPA 300.0Nitrate - EPA 300.0Nitrite - EPA 300.0Sulfate - EPA 300.0

Listed in dnr.wisconsin.gov, read 2026-09-20

Water Laboratories, Inc

Elk River, MN

(763) 441-7509

Certificate 399044470

Arsenic - EPA 200.9Lead - SM 3113BNitrate - EPA 353.2Nitrate + Nitrite - EPA 353.2Nitrite - EPA 353.2

Listed in dnr.wisconsin.gov, read 2026-09-20

Twin City Water Clinic

Hopkins, MN

(952) 935-3556

Certificate 399073400

Nitrate + Nitrite - EPA 353.2

Listed in dnr.wisconsin.gov, read 2026-09-20

Pace Analytical Services, LLC-Minneapolis MN

Minneapolis, MN

(612) 607-1700

Certificate 999407970

2,3,7,8-TCDD (Dioxin) - EPA 1613Copper - EPA 200.8Lead - EPA 200.8Mercury - EPA 245.1

Listed in dnr.wisconsin.gov, read 2026-09-20

Where this list comes from

Read on 2026-09-20 from 1 document published by Wisconsin Department of Natural Resources (chemistry) and Department of Agriculture, Trade, & Consumer Protection (microbiology). This page lists what those documents list — not necessarily every laboratory Wisconsin certifies — so check the official directory below before you rely on it.

DWLabs012126.xlsx (69 laboratories)

How Wisconsin publishes it: Excel spreadsheet for chemistry certifications, searchable database for microbiology

Access Wisconsin Lab Directory

State Certification Program

Wisconsin Department of Natural Resources (chemistry) and Department of Agriculture, Trade, & Consumer Protection (microbiology)

Visit Certification Program Website

💡 Local Resources & Tips

Wisconsin splits certification between two departments; State Lab of Hygiene provides comprehensive testing services

How to choose one of these labs

1.Shortlist two or three: start with the labs in your own city above, because most drinking-water samples must reach the lab within 24-30 hours of collection
2.Verify certifications: confirm the lab holds current state certification for the specific contaminants you want to test (bacteria, nitrate, metals, VOCs, PFAS). Certification is per-analyte, and a certificate number on this page is a starting point, not a guarantee it is still current
3.Request pricing: call multiple labs to compare prices and turnaround times—costs vary significantly even within the same state
4.Schedule testing: follow lab instructions for sample collection, storage, and delivery
5.Review results: compare detected concentrations against EPA standards and take appropriate action

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