Date: June 25, 2019

A few showers ending after midnight then mainly cloudy. Risk of a thunderstorm late this evening and after midnight. Wind becoming southwest 20 km/h after midnight. Low 17.


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Emergency Preparedness Sections

Chemical Emergency

Continuity Planning

Drinking Water

Emergency Notifications

Home Preparedness

Pandemic Planning

Power Outage

Severe Weather

Shelter Food Donation

Recommended Links

Drinking Water

This page was reviewed or revised on Tuesday, June 30, 2015 2:52 PM

During a power failure, the water supplied to your home by your local water utility may no longer be safe to drink without treatment. Pumps may fail and the water purification system may not operate properly threatening the safety of the water.

If a Boil Water Advisory has been issued by Lambton Public Health, DO NOT DRINK the water; there may be a potential problem. Use an alternate source of safe water, such as bottled water or follow these instructions to treat tap water when a Boil Water Advisory has been issued.

  1. Bring the water to a rolling boil for at least one minute (water should be bubbling and rolling). Never use gasoline or charcoal-burning devices, such as generators, grills, or camp stoves, inside your home, basement, garage, or near a window. Carbon monoxide from these sources could fill your home with poisonous gases.
  2. If water cannot be boiled, add 6 drops of unscented, liquid household bleach (4%-6% chlorine) per 4.55 litres (1 gallon) of water. A new bottle of bleach should be used to ensure effectiveness. Stir well and let the water stand for 30 minutes before using it. If making infant formula, let the water stand overnight, covered with a clean paper towel or a loose lid. This allows the bleach to do its job and then dissipate so that the bleach will not affect the taste of the formula.
  3. You may also use water purification tablets to treat tap water. Follow label directions.

In a Drinking Water Advisory, the water has become contaminated but cannot be treated and deemed safe by any of the above steps. Use an alternate water supply (i.e. bottled water).

Notification from Medical Officer of Health

The Medical Officer of Health will determine when a Boil Water Advisory / Drinking Water Advisory will be lifted or rescinded. This is only done when the original problem has been fixed and two sets of water samples, taken 24-48 hours apart, from all parts of the water system, are deemed safe for consumption.

When the advisory is lifted ensure the following steps are taken in your home:

  • Run all cold water taps for at least 1 minute before using the water.
  • Replace water filters used to filter untreated water.
  • Run water softeners through a regeneration cycle.
  • Drain and refill hot water heaters.