The WQ bulletin "Why Test Your Water?", available at your extension office, may be helpful in determining which tests to run. After selecting the tests, choose a lab to test the samples. See WQ 1, ...

the Minnesota Department of Health recently implemented changes to its water sampling procedures. Last fall, the department noticed inconsistent practices in the public health laboratory that affected ...

In the presumptive test, 9 different tubes of lactose broth with 10 fold variations of the water sample are inoculated. If any lactose-fermenting bacteria grow and produce gas, the medium will turn ...