Frequently Asked Water Quality Questions

 Reports on water quality

 Learn more about drinking water in Kingston. Download annual water quality reports from our website.

We take pride in providing safe, quality drinking water to residents and businesses in Kingston. Service excellence is important to us - if you have a question or concern about drinking water quality, please talk to one of our experts by calling 613-546-1181, extension 2525.

Below are answers to common questions about drinking water quality in Kingston. We hope this helps and look forward to assisting you.


My tap water is discoloured. Is it safe?

Activities on the water distribution system can disturb deposits that normally occur in water pipes. If you notice your tap water is brown or discoloured, please be assured the water is still safe. Flush your pipes until the water is clear again:

  1. Locate the cold water tap that is closest to your water meter.
  2. Run the cold water until it is clear. This may take 5 – 25 minutes.
  3. If the water does not clear, please contact Utilities Kingston at 613-546-1181.

I’m getting particles when running hot water. What’s wrong?

Your water heater may need to be flushed. Follow manufacturer’s instructions to do so. 

There is a pink residue in my shower and pet bowls. What is it? 

This is most likely due to naturally-occurring, airborne bacteria in your home. The bacteria produce a pinkish film, and sometimes a dark gray film, on surfaces that are regularly moist, including toilet bowls, showerheads, sink drains, and tiles. Some people have even noted the pink residue in their pet's water bowl, which causes no apparent harm and can be easily cleaned off. 

Cleaning and flushing with chlorine will not necessarily eliminate the problem, but will help to control these bacteria. If you have this issue on surfaces such as toilets, using a cleaning solution that contains chlorine will help curtail the onset of the bacteria. 

Smell and taste:

Why does my tap water smell like chlorine?

The drinking water in Kingston exceeds provincial water quality standards. In accordance with regulation, Utilities Kingston adds chlorine to disinfect your water and keep it free from harmful microorganisms. The levels of chlorine are harmless in the quantities used.

A small quantity of chlorine stays in the water after treatment to ensure that the water remains disinfected from the treatment facility to your tap. You may occasionally experience a slight smell or taste of chlorine coming from your tap water (the water is still safe). For example, when outdoor temperatures fluctuate, chlorine becomes more volatile. Other times, depending on the quality of the water supply coming from Lake Ontario, it may be necessary to adjust water treatment. This may include increasing the level of disinfectant to ensure your drinking water remains safe.

Why does my tap water smell like rotten eggs?

The smell may be venting from bacteria build-up in your drains. Try pouring a cup or two of bleach down the drain. Let sit for 15 minutes and then run the tap to flush. If the smell persists, call our water quality office at 613-546-1181 ex. 2525.

How can I remove the smell and taste of chlorine from my drinking water?

Customers can help remove the taste and smell of chlorine by following these suggestions:

  • Fill an uncovered glass pitcher with water and place it in the refrigerator. Most of the chlorine will dissipate, plus you’ll conserve water by not running your tap each time you fill a glass.
  • Bring your water to a rolling boil for five minutes and allow the water to cool.
  • Add a lemon slice or a few drops of lemon juice to a glass of drinking water.
  • Use a carbon filter.

My water has a ‘chemical’ taste. What’s wrong?

When water leaves the treatment plant, it adheres to strict water quality standards. However, a variety of scenarios at the service of the home or business can contribute to this taste. For example, when you connect a new garden hose, leaving it pressurized, the the sun can heat it up and force water back into the home’s plumbing. If you have concerns about water quality, please contact the water quality office at 613-546-1181, extension 2525.

I’m getting a smell when running hot water. What’s wrong?

Your water heater may need to be flushed. Follow manufacturer’s instructions to do so. 

Drinking water parameters:

Is municipal treated water fluoridated?

While trace amounts of fluoride occur naturally in drinking water, we do not fluoridate municipal treated water. Our annual reports on drinking water quality describe naturally-occurring fluoride levels and other parameters tested by accredited laboratories.

Is fluoride added to the drinking water in Kingston?

We do not fluoridate municipal treated water. Trace amounts of fluoride occur naturally. 

How is drinking water regulated?

Utilities Kingston meets the requirements of the Safe Drinking Water Act, which provides for the protection of human health and the prevention of drinking water health hazards through the control and regulation of drinking water systems and drinking water testing. Fluoridation of drinking water is addressed in the provincial Fluoridation Act.

Is drinking water safe without fluoridating it?

Fluoride does not impact water quality. Kingston’s drinking water is safe. The Ministry of the Environment and Climate Change completes annual inspections of all the water treatment systems operated by Utilities Kingston. Again in 2017, we received a 100 per cent rating for meeting the safety, operational, and compliance requirements under Ontario’s drinking water regulations.

Is there lead in Kingston’s drinking water?

As the water leaves treatment plants, we regularly test it according to Ministry of the Environment standards and know that the water leaving the Kingston water treatment plants is completely lead free. In fact, in most of Canada, the amount of lead in natural water supplies is very low. However, lead can enter the water supply from old lead service lines (pipes) or lead solder in the plumbing in your home. As well, the brass in some plumbing fixtures can contain high percentages of leadYou can consider becoming a community lead testing volunteer. Learn more from our web page about lead testing.

Safe drinking water:

What do I do in case of a boil water advisory?

Although rare, an adverse test result or potential problem in the water treatment and distribution system may result in us asking customers to boil water before consuming it. This web page explains what you should do in case we take this precautionary measure to ensure your safety. 

Should I drink water directly from my hot water tap?

For drinking and cooking (including boiling or making ice), we recommend using water from your cold tap. We know the water going into the water heater meets our quality standards. However, if your water heater is not maintained at the manufacturer recommended temperature settings, or if sediment is allowed to build up, this water could become a breeding ground for bacteria. (Always follow the manufacturer recommendations for maintaining your water heater.) 

If you are thinking about replacing your water heater, consider renting from Utilities Kingston. Find out more at or by calling one of our experts at 613-546-0000.

Where can I learn more about water quality in Kingston?

We’re proud of our drinking water. It exceeds strict Ministry of the Environment water quality standards and meets provincial regulations to ensure our water distribution system performs at a high level. View our annual reports on drinking water quality from our web page Water Quality Reports.

Comments or questions about municipal drinking water are always welcome. Please call our Water Quality Assurance Operators at 613-546-1181 ex. 2525.