Atrazine Screening Test


Atrazine is the most commonly used pesticide in Wisconsin. If present in drinking water in amounts above the advisory level of 3 parts per billion (ppb), atrazine may pose a cancer risk. The Wisconsin State Laboratory of Hygiene (WSLH) can test your drinking water supply for the presence of this pesticide.


Ordering Test Kits


To order a test kit, call the WSLH, toll free, at 800-442-4618 or, in the Madison area, 608-224-6202. Phone lines are open 7:45 a.m-4:30 p.m., Monday-Friday.

When ordering, please have the following information ready for each well you wish to test:

  • Name, address and phone number of the person to receive test results

A collection bottle, directions for collecting the sample, and a container for mailing the sample back will be sent to you. You will be billed after you receive your test results.




The results, with explanations of what they mean, will be sent to you from the WSLH.

The Wisconsin Departments of Health Services and Natural Resources consider atrazine levels at or below 3 ppb safe for drinking water. Contact a DNR Private Water Supply Specialist for additional information.