Test Your Private-Well Annually

Why should I test my well?

Unwanted substances known as contaminants can get into private well water. Private-well owners are responsible for testing and maintaining their wells.

Contaminants in your drinking water may lead to health problems. This makes private-well management an important health concern.

It’s important to test regularly because many contaminants may not cause any change in your water’s taste, color, or smell. Testing is not required but is encouraged.

What should I test for?

  • Test once a year
  • And, if there is a change in smell, taste, or color
  • Test once a year
  • And, before a pregnant person drinks the water
  • Test every well once
  • And, yearly if arsenic was previously detected

Who provides private-well water testing?

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There are several certified labs in Wisconsin that are available to the general public:

Certified Water Testing Labs in Wisconsin

Name County Contact Phone Street Address Mailing Address Website
Ag Source Cooperative Services Wood (715) 898-1402 3700 Downwind Dr Marshfield WI 54449 3700 Downwind Dr, Marshfield, WI 54449 https://vas.com/water-testing/
Analytichem Llc Kewaunee (920) 866-3944 N9190 Bay Meadows Ln Luxemburg WI 54217-9639 N9190 Bay Meadows Ln, Luxemburg, WI 54217-9639 https://www.analytichemllc.com/
Ashland County Health & Human Services Ashland 630 Sanborn Ave Ashland WI 54806 630 Sanborn Ave, Ashland, WI 54806-3537 https://co.ashland.wi.us/index.asp?SEC=1210B33D-E7DE-4DFC-A33D-C3795CC81E2A&Type=B_BASIC
Badger Laboratories Inc. Winnebago 2150 Memorial Dr Suite 106 Green Bay WI 54303 501 W Bell St, Neenah, WI 54956 https://www.badgerlabs.com/drinking-water-test-requests/
Badger Laboratories, Inc. Portage (800) 776-7196 501 W Bell St Neenah WI 54956-4868 3426 E Maria Dr, Stevens Point, WI 54481 https://www.badgerlabs.com/drinking-water-test-requests/
Badger Laboratories, Inc. Portage Steve Heraly (800) 776-7196 3426 E Maria Dr Stevens Point WI 54481 3426 E Maria Dr, Stevens Point, WI 54481-1332 https://www.badgerlabs.com/drinking-water-test-requests/
Baileys Harbor Wastewater Treatment Facility Door (920) 839-2037 2605 Summit Rd Baileys Harbor WI 54202 2605 Summit Rd, Baileys, 54202 https://www.baileysharborwiwastewater.org/water-testing/
Bayfield County Health Department Bayfield 117 E 6Th St Washburn WI 54891 P.O. Box 403, Washburn, WI 54891 https://www.bayfieldcounty.org/230/Water-Quality-Testing
Branch River Testing Service, Llc. Brown 693 Lamers Clancy Rd Greenleaf WI 54126 693 Lamers Clancy Rd, Greenleaf, WI 54126 https://branchrivertesting.com/lab
Brown County Health And Human Services Brown (920) 448-6478 2198 Glendale Ave Green Bay WI 54303-6405 2198 Glendale Ave, Green Bay, WI 54303-6405 https://www.browncountywi.gov/departments/public-health/general-information/services/well-water-testing/
Buffalo County Department Of Health And Human Services Buffalo (608) 685-6331 407 S 2Nd St Alma WI 54610 407 S 2Nd St, Alma, WI 54610 https://www.buffalocounty.com/342/Water-Testing
Commercial Testing Laboratory Inc Dunn (715) 962-3121 514 Main St Colfax WI 54730-0526 514 Main St, Colfax, WI 54730-0526 http://www.colfaxtestinglabs.com/water-activity-testing/
County Of Vernon Vernon Beth Johnson (608) 637-5251 P.O. Box 209 Viroqua WI 54665-0209 P.O. Box 209, Viroqua, WI 54665-0209 https://www.vernoncounty.org/departments/public_health_department/well_water_testing.php
Ct Laboratories, Llc Columbia (608) 356-2760 1230 Lange Crt Baraboo WI 53913 1230 Lange Crt, Baraboo, WI 53913 http://www.ctlaboratories.com/contact.html
Culligan International Company IL (847) 430-1284 9399 W Higgins Rd Suite B2 Rosemont Il 60018 9399 W Higgins Rd Suite B2, Rosemont, IL 60018 https://www.culligan.com/water-lab-test-kits
Dairyland Laboratories Inc Trempealeau (608) 323-2123 217 E Main St Arcadia WI 54612 217 E Main St, Arcadia, WI 54612 https://www.dairylandlabs.com/water/analytical-packages
Douglas County Health And Human Services Douglas (715) 395-1304 1316 N 14Th St Suite 324 Superior WI 54880 1316 N 14Th St Suite 324, Superior, WI 54880 https://www.douglascountywi.org/1056/Safe-Drinking-Water
Drummond Sanitary District # 1 Bayfield Mark Jerome 52560 Front Ave Drummond WI 54832-0043 P.O. Box 43, Drummond, WI 54832 https://www.drummondwi.com/sanitary-district
Eagle River Health Department Laboratory Vilas (715) 479-3600 330 Court St Eagle River WI 54521-8362 330 Court St Eagle River WI 54521-8362 https://www.vilascountywi.gov/departments/services/public_health_department/environmental.php
Eau Claire City County Health Department Eau Claire 720 Second Ave Eau Claire WI 54703-5413 720 2Nd Ave, Eau Claire, WI 54703-5413 https://www.eauclairewi.gov/government/our-divisions/health-department/inspections-and-testing/food-and-water-testing-quality
Ephraim Wastewater Plant Door (920) 854-4991 10285 Town Line Dr Ephraim WI 54211-0138 P.O. Box 138, Ephraim, WI 54211 https://ephraim-wisconsin.com/wellwater-testing/
Eurofins Eaton Analytical, Llc IN (574) 233-4777 110 South Hill St South Bend In 46617 110 S Hill St, South Bend, IN 46617-2702 https://www.eurofinsus.com/environment-testing/services/water/
Eurofins Microbiology Laboratories Milwaukee, Waukesha 2345 170Th St New Berlin WI 53151 2345 S 170Th St, New Berlin, WI 53151-2701 https://www.eurofins.com/environment-testing/lab-services/water-testing/drinking-water/
Florence County Health Department Florence (715) 528-4837 501 Lake Ave Florence WI 54121-8805 501 Lake Ave, Florence, WI 54121-8805 https://florencewipublichealth.com/water-well-testing.htm
Fond Du Lac County Health Department Fond Du Lac (920) 929-3085 160 S Macy St Fond Du Lac WI 54935 160 S Macy St, Fond Du Lac, WI 54935 https://www.fdlco.wi.gov/departments/departments-f-m/health-department/inspection-department/well-testing-program
Genoa City Water Utility Kenosha (262) 279-5728 521 1St St Genoa City WI 53128 P.O. Box 428, Genoa City, WI 53128 https://www.genoacity.info/
Grafton Water Utility Ozaukee (262) 375-5331 1860 9Th Ave Grafton WI 53024 860 Badger Rd, Grafton, WI 53024 https://www.village.grafton.wi.us/146/Private-Wells
Griesbach Corporation Outagamie (920) 757-1355 N1022 Quality Dr Greenville WI 54942-8604 P.O. Box 170, Greenville, WI 54942 https://diamondh2o.com/lab-testing-services/
Iron County Health Department Iron Denise Lotzer 210 Fifth Avenue North Hurley WI 54534 210 Fifth Avenue North, Hurley, WI 54534 https://www.ironcountypublichealth.org/environmental-public-health
Jackson County Public Health Jackson 421 County Road R Black River Falls WI 54615 421 County Road R, Black River Falls, WI 54615 https://www.co.jackson.wi.us/index.asp?SEC=3D2128E6-C9AE-4E7D-8114-0E3BB5FABFDF
Kenosha County Division Of Health Kenosha (800) 472-8008 8600 Sheridan Rd Kenosha WI 53143 8600 Sheridan Rd, Kenosha, WI 53143 https://www.kenoshacounty.org/352/Private-Well-Water
La Crosse County Public Health Lab La Crosse (608) 785-9733 300 4Th St N La Crosse WI 54601 300 4Th St N, La Crosse, WI 54601 https://www.cityoflacrosse.org/your-government/departments/utilities/water-utility/private-wells/private-well-la-crosse-county
Lab Tech Services Llc Langlade (715) 623-6281 N6411 Vacha Lane Deerbrook WI 54424 N6411 Vacha Lane, Deerbrook, WI 54424 https://www.lab-techservices.com/services
Lafayette County Health Department Lafayette Erin Hastert (608) 776-4895 729 Clay St Darlington WI 53530-1225 729 Clay St, Darlington, WI 53530-1225 https://www.lafayettecountywi.org/healthdepartment/page/water-testing-lab
Leuther Laboratories Llc Vernon (608) 788-8180 N1006 County Road M Coon Valley WI 54623-9519 N1006 County Road M, Coon Valley, WI 54623-9519 http://www.leutherlab.com/watertesting.html
Lincoln County Health Dept. Lincoln Meghan M Young (715) 539-1379 607 N Sales St Suite 101 Merrill WI 54452 607 N Sales St Suite 101, Merrill, WI 54452 https://co.lincoln.wi.us/health/page/private-and-public-water-testing
Lv Laboratories Llc Grant 1015 S Madison St Lancaster WI 53813-0343 1015 S Madison St, Lancaster, WI 53813-0343 https://www.lvlabs.org/
Marathon County Public Health Lab Marathon (715) 261-1908 1000 Lake View Dr Ste 100 Wausau WI 54403-6786 1000 Lake View Dr Ste 100, Wausau, WI 54403-6786 https://www.co.marathon.wi.us/Departments/HealthDepartment/EnvironmentalHealth/WaterTestingLab.aspx
National Testing Lab Ltd OH ntlsales@ntllabs.com (800) 458-3330 6571 Wilson Mills Rd, Cleveland, Ohio 44143 6571 Wilson Mills Rd, Cleveland, Ohio 44143 https://watercheck.com/?gclid=Cj0KCQjw2MWVBhCQARIsAIjbwoPDc09QpJbYI5XhyjOXnFPRuy3VmD_Wkg8NEbIm6dFklJaj2RZX3ioaAs_2EALw_wcB
Northern Lake Service, Inc. - Crandon Forest (715) 478-2777 400 N Lake Ave Crandon WI 54520 400 N Lake Ave, Crandon, WI 54520 https://nlslab.com/
Northern Lake Service, Inc. - Waukesha Waukesha (262) 547-3406 2420 N Grandview Blvd, Waukesha, WI 53188 2420 N Grandview Blvd, Waukesha, WI 53188 https://nlslab.com/
Northland College Ashland, Bayfield Chris Mcnerney (715) 682-1810 1411 Ellis Ave Ashland WI 54806 1411 Ellis Ave, Ashland, WI 54806-3925 https://www.northland.edu/centers/mgbc/lab/
Oneida County Health Department Oneida Jody Mckinney (715) 369-6111 100 W Keenan St Rhinelander WI 54501 100 W Keenan St, Rhinelander, WI 54501 https://publichealth.co.oneida.wi.us/services/environmental-health/private-water-testing/
Public Health Madison & Dane County Dane (608) 242-6515 210 Martin Luther King Jr Blvd Rm 516B Madison WI 53703 210 Martin Luther King Jr Blvd, Madison, WI 53703-3340 https://www.publichealthmdc.com/environmental-health/laboratory-services/drinking-water-testing
Rock County Health Department Janesville Rock (608) 757-5440 3328 Us Highway 51 N Janesville WI 53545 P.O. Box 1088, Janesville, WI 53547-1088 https://www.co.rock.wi.us/departments/public-health/environmental-health/private-well-testing
Rusk County Health And Human Services Rusk (715) 532-2208 311 Miner Ave E Ladysmith WI 54848 311 Miner Ave E, Ladysmith, WI 54848 https://ruskcounty.org/index.asp?SEC=E8D1E006-9F79-432A-B236-D9454F72A408&DE=9E734BED-512F-4DE8-BD83-B1DFD061335C
S & R Krizan Pump Service Incorporated Racine (262) 895-6454 7465 S Loomis Rd Wind Lake WI 53185 7465 S Loomis Rd, Wind Lake, WI 53185 https://www.ronkrizanpumpandplumbing.com/
Sawyer County Health & Human Services Sawyer (715) 634-4806 10610 Main St Ste 224 Hayward WI 54843-6586 10610 Main St Ste 224, Hayward, WI 54843-6586 https://www.sawyercountygov.org/511/DrinkingWell-Water-Testing
Slinger Water Utility Washington 300 Slinger Rd Slinger WI 53086-9022 300 Slinger Rd, Slinger, WI 53086-9022 https://www.fivestar-inspections.com/well-inspections/
State Laboratory Of Hygiene Dane (800) 442-4618 2601 Agriculture Dr Madison WI 53707 P.O. Box 7996, Madison, WI 53707-7996 http://www.slh.wisc.edu/environmental/water/public-environmental-and-water-testing-prices/
Stevens Point Water & Sewage Portage (715) 345-5262 301 Bliss Ave Stevens Point WI 54481-0243 P.O. Box 243, Stevens Point, WI 54481 https://www3.uwsp.edu/cnr-ap/weal/Pages/Homeowner.aspx
Suburban Laboratories Of Southeast Wisconsin Ozaukee (920) 459-2500 10520 Baehr Rd Suite J Mequon WI 53092 10520 N Baehr Rd Suite J, Mequon, WI 53092 https://drinkingwaterlabs.com/
Swd Labs Llc Columbia (920) 326-5193 N9935 Pleasant Rd Randolph WI 53956 P.O. Box 150, Randolph, WI 53956 https://www.samswelldrilling.com/waterquality/
Taylor County Health Dept Taylor Patty Krug (715) 748-1410 224 S 2Nd St Medford WI 54451-1811 224 S 2Nd St, Medford, WI 54451-1811 https://co.taylor.wi.us/hd/water-testing/
Tim Butterfield Drilling, Inc. St. Croix Tim Butterfield (715) 247-4873 395 Reed St Somerset WI 54025 395 Reed St, Somerset, WI 54025 https://www.timbutterfielddrilling.com/water-testing
University of Wisconsin - Oshkosh ERIC Lab Winnebago eric@uwosh.edu (920) 424-3148 783 Pearl Ave Oshkosh WI 54901 UW Oshkosh ERIC 800 Algoma Blvd. Oshkosh, WI 54901 https://uwosh.edu/eric/environmental-health-testing/water-testing/
UW-Stevens Point (UWSP) Water Lab Portage weal@uwsp.edu 715-346-3209 800 Reserve St., Stevens Point, WI 54481 800 Reserve St., Stevens Point, WI 54481 https://www3.uwsp.edu/cnr-ap/weal/Pages/Homeowner.aspx
Village Of Jackson Washington W194N16658 Eagle Dr Jackson WI 53037 P.O. Box 637, Jackson, WI 53037 https://www.co.jackson.wi.us/index.asp?SEC=3D2128E6-C9AE-4E7D-8114-0E3BB5FABFDF
Village Of Pleasant Prairie Kenosha Tom Hupp (262) 925-6700 8600 Green Bay Rd Pleasant Pr WI 53158-2702 8600 Green Bay Rd, Pleasant Prairie, WI 53158-2702 https://www.pleasantprairiewi.gov/departments/sewer_and_water_utilities/well_water
Walworth County Department Of Health & Human Services Walworth Erica Bergstrom 1910 County Road Nn Elkhorn WI 53121 P.O. Box 1005, Elkhorn, WI 53121-1005 https://www.co.walworth.wi.us/430/Well-Water-Testing
Water Compliance Specialists, Inc. Columbia (608) 592-3882 924 Development Dr Unit C Lodi WI 53555-1800 P.O. Box 135, Lodi, WI 53555 https://www.testh2o.com/
Water Diagnostics Laboratories, Llc Ozaukee 8605 Freistadt Rd Mequon WI 53097 8605 Freistadt Rd, Mequon, WI 53097 http://www.waterdiagnostics.net/
Water Laboratories Inc MN (763) 441-7509 333 Main St Nw Elk River Mn 55330-1531 P.O. Box 388, Elk River, MN 55330 https://waterlabs.net/individual-tests/
Water Quality Investigations Dane Andrew Jacque (888) 499-2507 2581 State Road 92 Ste 2 Mount Horeb WI 53572-2419 2581 State Road 92 Ste 2, Mount Horeb, WI 53572-2419 https://wqinvestigations.com/services-forms/
Waukesha County Department Of Parks & Land Use Waukesha (262) 896-8300 515 W Moreland Blvd Ac260 Waukesha WI 53188 515 W Moreland Blvd Ac260, Waukesha, WI 53188 https://www.waukeshacounty.gov/watertest
Waupaca County Dhhs - Environmental Microbiology Laboratory Waupaca Jed Wohlt (715) 258-6323 811 Harding St Waupaca WI 54981 811 Harding St, Waupaca, WI 54981 https://www.waupacacounty-wi.gov/departments/health_and_human_services/water.php
Wisconsin State Lab of Hygiene (WSLH) Dane (800) 442-4618 2601 Agriculture Dr, Madison, WI 53718 2601 Agriculture Dr, Madison, WI 53718 http://www.slh.wisc.edu/environmental/water/public-environmental-and-water-testing-prices/
Wood County Health Department Wood Nancy Eggleston (715) 421-8955 111 W Jackson St Wisc Rapids WI 54495-2702 111 W Jackson St, Wisconsin Rapids, WI 54495-2702 http://www.co.wood.wi.us/departments/health/WaterLaboratory.aspx
Name County Contact Phone Street Address Mailing Address Website

What should I do if I have high levels of contaminants?

1. General Questions?

Get in touch with your local health department about resources in your area

2. Learn about Health Concerns

Contact WI Department of Health Services
(608) 266-1120
DHSEnvHealth@wi.gov

3. Learn about Mitigation Concerns

Contact: Dept of Safety and Professional Services
(608) 267-1401
glen.schlueter@wi.gov
https://go.wisc.edu/mitigation-strategies

Find information on water treatment devices on the National Science Foundation’s Website:
https://info.nsf.org/Certified/DWTU/

Private Well Water Supply Specialists

4. Schedule Well Repairs

Contact a well driller or pump installer

Additional Questions and Concerns

Do you have concerns about the taste, smell, or color of your water?

Get information about specific concerns from the Wisconsin Department of Natural Resources


Do you have concerns about how much it will cost to fix your well if you find a problem?

Finding a contaminant in your well doesn’t necessarily mean you will need to replace your well. Some common repairs include chlorinating (or shocking) your well and replacing the well head.

There are a variety of grants and financial resources for mitigation efforts, including: