Well Water Testing

Environmental Protection Agency (EPA) regulations that protect public drinking water systems do not apply to privately owned wells. As a result, owners of private wells are responsible for ensuring that their water is safe from contaminants. Regular maintenance of your well is required to ensure the continued safety of your water and to monitor for the presence of any contaminants. Public Health offers water testing options to home owners for a fee.

Water Lab

View the Water Lab Brochure (PDF).

The water lab will be closed on the following days:

  • April 18 and 19, 2019
  • May 27, 2019
  • July 4, 2019
  • September 2, 2019
  • November 28 and 29, 2019
  • December 23, 2019 through January 13, 2020

Certified Tests

The following certified tests are available:

  • Arsenic (Subcontracted to Suburban Laboratories Inc.)
  • Bacteria (Coliform and Ecoli)
  • Lead (Subcontracted to Suburban Laboratories Inc.)
  • Nitrate

Non-Certified Tests

These tests are not performed using a certified method and may not be used to prove a safe water source. These are for homeowner interest only. The following Non-Certified Homeowner Interest Only Tests are available:

  • Fluoride
  • Water Hardness

Obtaining a Water Test Kit

The Water Laboratory may only accept water samples in approved sample containers. Homeowners may obtain an approved container by visiting the Public Health reception desk Monday through Friday from 8 a.m. to 4:30 p.m.

Water Sample Collection

Homeowners are responsible for collecting their own water samples and for returning the samples to the laboratory. Samples may be collected from any faucet supplied with cold water.

Returning a Water Sample

Samples are accepted at the Public Health Reception Desk during the following times:

Monday and Wednesday
8 a.m. –to 4 p.m.

8 a.m. to 5:30 p.m.

8 a.m. to 4 p.m.

7 a.m. to Noon

Every 3rd Friday of the month
8 a.m. to 3 p.m.

Sample Rejection Criteria

Water samples may be rejected if:

  • Nitrate samples are not received on ice
  • Samples are in an unapproved, notably dirty, or damaged container
  • Samples cannot be analyzed within 30 hours of collection for bacteria or 48 hours for nitrate
  • Samples do not contain the required amount of water
  • Samples have been frozen

Water Quality

View Water Quality Information for Walworth County.