Labs certified for coliform bacteria135
135 named for coliform bacteria itself on the list.
Marked as taking public samples0
Per the state list or a state web page. Call to confirm.
Out-of-state labs1
Located outside Wisconsin but on its list.
People on private wells (2015)1,598,065
USGS estimate for Wisconsin.
How many labs test for coliform bacteria in Wisconsin
135 labs on Wisconsin's official drinking-water lab list are certified to test for coliform bacteria. All 135 are named for coliform bacteria on the list. The Wisconsin list does not say which labs take samples from homeowners, so call a lab before you send one. 1 is located outside Wisconsin.
The list is published by the Wisconsin DNR / DATCP (microbiology). List version on file: live page. Fetched 2026-11-15 (UTC).
Wisconsin labs certified for coliform bacteria
| Lab | Location | Bacteria certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| A-1 Advanced Pumping Service Inc | West Salem, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Agsource Cooperative Services | Marshfield, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Analytichem LLC | Luxemburg, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Ashland County Health & Human Services | Ashland, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Badger Laboratories, Inc. | Green Bay, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Badger Laboratories, Inc. | Neenah, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Badger Laboratories, Inc. | Stevens Point, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Bayfield County Health Department | Washburn, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Branch River Testing Service, LLC. | Greenleaf, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Brown County Health And Human Services | Green Bay, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Buffalo County Department Of Health And Human Services | Alma, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| C & C Pumps LLC | Hartford, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Chippewa County | Chippewa Fls, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| City Of Milwaukee Health Dept Laboratory | Milwaukee, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Clark County Health Department | Neillsville, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Commercial Testing Laboratory Inc | Colfax, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Ct Laboratories, LLC | Baraboo, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Davy Engineering Company, Inc | La Crosse, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Douglas County Health And Human Services | Superior, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Dunn County Health Department | Menomonie, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Eagle River Health Department Laboratory | Eagle River, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Eau Claire City County Health Department | Eau Claire, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Eurofins Microbiology Laboratories | New Berlin, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Farm First Dairy Cooperative | Kaukauna, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Florence County Health Department | Florence, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Fond Du Lac County Health Department | Fond Du Lac, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Green County Public Health Department | Monroe, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Griesbach Corporation | Greenville, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Infrastructure Alternatives Inc | Antigo, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Iowa County | Dodgeville, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Iron County Health Department | Hurley, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Jackson County Public Health | Black River Falls, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Kenosha County Division Of Health | Kenosha, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Kohler Co. | Kohler, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Kwik Trip Inc* | La Crosse, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| La Crosse County Public Health Lab | La Crosse, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Lab Tech Services LLC | Deerbrook, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Lafayette County Health Department | Darlington, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Langlade County | Antigo, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Leuther Laboratories LLC | Coon Valley, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Lincoln County Health Dept. | Merrill, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Lv Labs Ww, LLC. | Lancaster, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| M M S D Lab Services Central Lab | Milwaukee, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Marathon County Public Health Lab | Wausau, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Marquette County Health Department | Montello, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Matrix Sciences International Inc | Green Bay, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Monroe County Health Department | Sparta, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Northern Lake Service, Inc. | Crandon, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Northern Lake Service, Inc. | Waukesha, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Oneida County Health Department | Rhinelander, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Outagamie County Public Health Lab | Appleton, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Pace Analytical Services, LLC | Green Bay, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Polk County Health Department | Balsam Lake, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Public Health Madison & Dane County | Madison, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Pure Water Labs, LLC | Lodi, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Pure Water Labs, LLC | Reedsburg, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Racine Public Health Department | Racine, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Rock County Health Department Janesville | Janesville, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Rockford Water Division Environmental Lab | Rockford, IL | Named on the official list | Public samples: ask the lab | Not on the list |
| Rusk County Health And Human Services | Ladysmith, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| S & R Krizan Pump Service Incorporated | Wind Lake, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Sawyer County Health & Human Services | Hayward, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| State Laboratory Of Hygiene | Madison, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Superior Water Light Power Co | Superior, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Swd Labs LLC | Randolph, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Two Rivers Water & Light | Two Rivers, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| U.s. Water, LLC | Weston, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| University Of Wisconsin - Oshkosh | Land O Lakes, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| University Of Wisconsin - Oshkosh | Manitowoc, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| University Of Wisconsin - Oshkosh | Oshkosh, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| University Of Wisconsin - Oshkosh | Sturgeon Bay, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| University Of Wisconsin - Superior | Superior, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Walworth County Department Of Health & Human Services | Elkhorn, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Washington Ozaukee Public Health Department | Port Washington, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Washington Ozaukee Public Health Department | West Bend, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Water & Environmental Analysis | Stevens Point, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Water Diagnostics Laboratories, LLC | Mequon, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Water Quality Investigations | Mt Horeb, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Watertown Department Of Public Health | Watertown, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Waukesha County Department Of Parks & Land Use | Waukesha, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Waupaca County Dhhs - Environmental Microbiology Laboratory | Waupaca, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| White Water Associates, Inc. | Kewaunee, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Wisconsin Department Of Agriculture, Trade And Consumer Protection | Madison, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| Wood County Health Department | Wisconsin Rapids, WI | Named on the official list | Public samples: ask the lab | Not on the list |
| A. O. Smith Water Treatment (North America, Inc.) | Appleton, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Appleton Water Treatment Facility | Menasha, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Ashland Wastewater Treatment Plant | Ashland, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Baileys Harbor Wastewater Treatment Facility | Baileys Harbor, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Beloit Water Pollution Control Facility | Beloit, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Bristol Wastewater Treatment Plant | Bristol, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Brookfield Water Utility | Brookfield, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| City Of Burlington Utilities | Burlington, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| City Of Eau Claire | Eau Claire, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| City Of Hudson | Hudson, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| City Of Kenosha Water Utility | Kenosha, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| City Of Medford Wastewater Treatment Plant | Medford, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| City Of Onalaska | Onalaska, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| County Of Vernon | Viroqua, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Cudahy Water Utility | Cudahy, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Drummond Sanitary District # 1 | Drummond, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| East Troy Wastewater Treatment | East Troy, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Ephraim Wastewater Plant | Ephraim, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Genoa City Water Utility | Genoa City, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Grafton Water Utility | Grafton, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Green Bay Water Utility Lab | Green Bay, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Janesville Wastewater Lab | Janesville, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Lake Geneva Utility Commission | Lake Geneva, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Manitowoc Public Utilities | Manitowoc, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Marshfield Utilities | Marshfield, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Menasha Electric & Water Utility | Menasha, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Menomonee Falls Water Utility | Menomonee Falls, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Menomonie Waste Water | Menomonie, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Milwaukee Water Works | Milwaukee, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Milwaukee Water Works | Milwaukee, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Neenah Water Utility | Neenah, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| North Shore Water Commission | Milwaukee, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Oak Creek Water & Sewer Utility | Oak Creek, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Oshkosh Water Dept | Oshkosh, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Port Washington Water Dept | Port Washington, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Racine Water Department | Racine, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| River Falls Wastewater Treatment Plant | River Falls, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Sheboygan Water Utility | Sheboygan, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Slinger Water Utility | Slinger, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| South Milwaukee Water Utility | South Milwaukee, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Stevens Point Water & Sewage | Stevens Point, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Village Of Fredonia | Fredonia, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Village Of Jackson | Jackson, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Village Of Kewaskum | Kewaskum, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Village Of Pleasant Prairie | Pleasant Prairie, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Village Of Plover | Plover, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Village Of Sister Bay | Sister Bay, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Village Of Union Grove Wwtp | Union Grove, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Waukesha Water Utility | Waukesha, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| West Allis Water Dept | West Allis, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Wisconsin Rapids Water Utility | Wisconsin Rapids, WI | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
How the Wisconsin list marks public samples (whole list). Not stated. Includes utility and wastewater labs.
Before you send a sample, call the lab to confirm it is currently certified for the exact test and method, that it accepts samples from homeowners, and how to collect and ship them. Status can change between list updates.
Why test for coliform bacteria in Wisconsin
About a third of the 397 domestic wells tested for bacteria in a national USGS study had total coliform. Read our coliform bacteria explainer.
EPA advises private-well owners to test every year for total coliform bacteria, nitrates, total dissolved solids and pH. [1]
Wisconsin guidance that mentions coliform bacteria:
- Bacteria once a year and when the taste, color or smell changes. Nitrate once a year and before the well is used by someone who is or may become pregnant. Arsenic once every five years for most well users; every year in Outagamie, Winnebago or Brown county or if arsenic was found before. [2]
Prices at Wisconsin State Laboratory of Hygiene, prices effective July 1, 2026, as published when checked on 1 Nov 2026. Private certified labs set their own prices.
| Test | Price |
|---|---|
| Bacteria (total coliform / E. coli) | $35 [3] |
About 1,598,065 people in Wisconsin used private wells in 2015, by the USGS estimate of people on domestic self-supplied water. [4] Federal limits are written for public water systems, not private wells, so testing is up to the owner.
For tests that depend on your home (farms nearby, old plumbing, a new baby), use the which-tests checklist. When results arrive, check your numbers against EPA's limits. State guidance, county data and every lab: Wisconsin.
Sources
- U.S. EPA, Protect your home's water
- Wisconsin DNR, Test your private well water annually
- Wisconsin State Laboratory of Hygiene, Public environmental and water testing prices (effective Jul 1, 2026)
- USGS, Estimated use of water in the United States, county-level data for 2015 (Dieter et al., ver. 2.0, 2018)
- Wisconsin DNR - Drinking Water (SDWA) Labs Certified for Coliform Bacteria Testing (official list)
Certified as oflive page
Wisconsin DNR - Drinking Water (SDWA) Labs Certified for Coliform Bacteria Testing.
Official sourceFind a labFilter the Wisconsin list
Search by city or ZIP among labs for coliform bacteria.
Open the finder →