Date: May 21, 2019

Mainly cloudy. Wind becoming southeast 20 km/h overnight. Low 6.


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Keep Wells Safe During Flood Conditions

This page was reviewed or revised on Thursday, February 22, 2018 2:46 PM

Sarnia, ON - Lambton Public Health encourages residents with private wells to test their water supply as soon as possible if their well has been flooded.
Recent high-water levels and flood conditions, caused by rain and snow melt, could allow harmful bacteria to enter the drinking water supply rendering the water supply unsafe for consumption.

Theresa Warren, Public Health Inspector at Lambton Public Health, says "Until you can test your well water, use bottled water for drinking, making infant formula, juices, cooking, making ice, washing fruits and vegetables or brushing teeth, or boil your water rapidly for at least one minute before use."

Once flood waters have receded, the well should be disinfected and tested at least 3 times before the water is used for drinking. The test for bacteria (total coliform and E. coli) is free. Water samples must be dropped off within 24 hours of being taken.

Water sample kits can be picked up and dropped off at:

  • Lambton Public Health, 160 Exmouth St., Point Edward
  • Bluewater Health CEE (lab), 450 Blanche St., Petrolia
  • North Lambton Community Health Centre, 59 King St., W., Forest
  • London Public Health Lab, 850 Highbury Ave. N., London

Lambton Public Health recommends well water testing 3-4 times annually to ensure the supply is not contaminated.

For information on disinfection and sampling procedures, visit or call Lambton Public Health, 519-383-8331 or toll free 1-800-667-1839.


Please contact:

Theresa Warren
Public Health Inspector
County of Lambton
519-344-2057 ext. 3576