PFAS in Drinking Water Testing

The detection of PFAS and associated emerging contaminants in drinking water is a new and rapidly evolving field. Information on this page is subject to change without notice. 


Test Options and Pricing


  • EPA 537.1 – 18 compounds – Cost: $375.00
  • PFAS in Water – 33 compounds (includes all 18 compounds in EPA 537.1) – Cost: $425.00


Sampling Instruction Video




What’s the difference between the two tests? 

  • EPA 537.1 includes 18 compounds. It is a drinking water-specific test method developed and published by the US Environmental Protection Agency (EPA).
  • PFAS in Water includes 33 compounds. It is a test method developed and validated by WSLH scientists. The Wisconsin Department of Natural Resources (DNR) Laboratory Certification Program has granted the WSLH certification in the aqueous matrix for 33 compounds extracted and analyzed by this test method.

Which test is recommended?

You can choose either test. DNR and the Wisconsin Department of Health Services (DHS) recommend the PFAS in Water test because it includes more compounds.


What’s the difference between PFAS, PFOS and PFOA?

PFAS stands for per- and polyfluoroalkyl substances. PFAS are a group of synthetic chemicals used in a wide array of consumer and industrial products since the 1950s. Perfluorooctane sulfonic acid (PFOS) and Perfluorooctanoic acid (PFOA) are two types of PFAS. You can learn more about PFAS here.


Are there health-based standards for these compounds?

There are currently no federal drinking water standards for PFAS. The DNR is currently undergoing rule-making to adopt groundwater and drinking water standards for some PFAS. The recommended standards can be found here.


How do I request a test kit?

Please call WSLH customer service at 800-442-4618 (Monday – Friday, 7:45 AM – 4:30 PM or leave a voicemail after hours).


What is the current turnaround time for test results? 

It is between 1 to 2 months. You can call 608-224-6269 to get an estimate for your situation.


Why is the turnaround time so long?

This is a very labor intensive test. When the lab is not running at capacity, the turnaround time is approximately 1 month. Due to current high demand for testing, our turnaround time has increased to between 1 to 2 months.


Will I be contacted before my kit is shipped?

Yes, we will reach out to you the week before we ship your kit to make sure you are ready to receive it, answer any questions you may have, and confirm you still want to receive the kit.


I have my kit, when should I collect my sample?

Each kit is shipped with a Test Request form to fill out. There are certain sections of the form highlighted in yellow, including the bottom right portion where a sample collection date range is listed. You MUST collect your sample and return it to the lab during that sample collection date range. If you fall outside that date range, you may be asked to resample at a later date.


How will I get my results?

Results will be sent to the email address you provide when setting up your account. If you do not provide an email address, your results will be sent via US Postal Service.


How/when do I pay for my test? 

An invoice will be sent through US Postal Service to the address you provide when setting up your account. This occurs around the 5th of the month after you have received your results.


I have my results, what do they mean? 

The lab does not interpret results. If you have questions about what your test results mean for your health, please contact DHS at and one of their experts will get in touch with you.


I have other questions about PFAS, who can I contact for more information?

DNR PFAS contacts by subject area can be found here.