How Does Water Testing Work in Ontario: Understanding the Process

Quinn Tran • March 14, 2022

In Ontario, Canada, ensuring the safety and purity of the water supply is a top priority. The province has established a comprehensive system for water testing, monitoring, and regulation to safeguard public health and the environment. In this blog post, we will delve into the intricacies of water testing in Ontario, exploring the processes, standards, and organizations involved in maintaining the highest standards of water quality. By understanding how water testing works in Ontario, you'll gain valuable insights into the measures taken to protect and ensure the availability of clean and safe water for your tap.

well water testing

There are a lot of reasons why you should  know your water .

Here’s a fun fact I discovered about an area of Guelph. There is a decent size area in Guelph,ON where the water has a significantly higher than normal PPM of lithium of 460 ppm. That is 2 to 3 times the level water hardness than the average!

PPM means parts per million and TDS means total dissolved solids. In areas of “hard” or slightly saline water, the TDS of the groundwater can be high. What determines whether it’s hard or soft is what minerals are making up the TDS. Depending on what the TDS is comprised of it could be up to 1000ppm, and still considered potable.

There are events occurring in areas of longtime heavy water drawdown is that the layer of fresh and clean water is gradually being displaced with deeper and more saline water.

If you find that you are located in an area where the water is “fresh” and the saturated thickness of the aquifer is more than 200 feet, you need to also make sure that you have the water rights for your property.

Water and mineral rights can be sold separately from the surface, and you need to know whether anyone else has either the water or mineral rightss under your property.

All things considered, The well may be the most important asset on the property and it is important to understand it.

HOW OFTEN SHOULD I TEST MY WELL WATER?

Private well water should be tested a minimum of once per year. Drinking water supplies obtained from shallow wells and surface water sources should be tested more frequently (i.e. seasonally), as they are more susceptible to contamination.

It is important to test your drinking water at the tap and at the source. Testing both will help you determine if your treatment system is performing correctly, and if the quality of your source water has changed.

HOW DOES WATER TEST WORK?

Here is a printed copy of a water test

well water testing

Professional well water tests are available to help determine the health and safety of a water source, and the performance of a water treatment system. Your local lab can assist in selecting tests important for assessing your drinking water concerns.

  • Basic water potability include tests for coliform bacteria, nitrates, pH, sodium, chloride, fluoride, sulphate, iron, manganese, total dissolved solids, and hardness.
  • Coliform bacteria indicate the presence of microorganisms in the water that are potentially harmful to human health.
  • Nitrate. A common contaminant found mainly in groundwater. High nitrate concentrations can be particularly dangerous for babies under six months, since nitrate interferes with the ability of blood to carry oxygen.
  • IonsIons such as sodium, chloride, sulphate, iron, and manganese can impart objectionable taste or odor to water.
  • Sulphate. Excessive amounts of sulphate can have a laxative effect or cause gastrointestinal irritation.
  • Fluoride. Fluoride is an essential micro-nutrient, but excessive amounts can cause dental problems.
  • Total dissolved solids represent the amount of inorganic substances (i.e. sodium, chloride, sulphate) that are dissolved in the water. High total dissolved solids (TDS) can reduce the palatability of water.
  • Additional testing. Additional tests may be appropriate if a particular contaminant is suspected in the water. For instance, groundwater sources are sometimes tested for arsenic, selenium, and uranium. Both surface and groundwater sources may also be tested for pesticide contamination.

WHERE CAN I TEST MY WATER?

You don’t have to take on this water analysis on your own. The first thing I would recommend is checking in with the Region’s Water and Wastewater Department or local health department . Usually the Public Health Units are the ones that will know the water quality and situation a lot better than any tests you can afford will.
– Contact your local lab:
You can rinse and use a clean bottle to store a few ounces of tap water and bring it to a local labs. These lab often send test result within days. You can easily contact them through the Region’s Water and Wastewater site, they will also give you enough info about water quality in your area.
– Contact a private lab:

You can take a water sample to a private lab to have it tested for basic contaminates (usually $40 to $75) or broad spectrum contaminates which can run a few hundred dollars but they will give you a printed analysis of what they find and usually give you a recommendation of what (if anything) is needed in the way of filtration.

Contact Us

Blog Posts

tap water filtration ontario gta Toronto
By Quinn Tr May 2, 2025
You trust your tap water… but should you? After testing water across hundreds of homes in Toronto & York Region—here’s what I discovered 👇
faucet water
By Quinn Tran May 15, 2023
Ensure safe drinking water with Quinn Water Systems' guide to getting your water tested in Ontario. Learn about water quality and how to protect your health.
faucet water
By Quinn Tr July 13, 2022
Do you live on a property with a well? Water testing can help identify contaminants in your water and determine the best treatment options for your well.
Well Water Test Ontario
By Quinn Tran July 12, 2022
Learn how to do a well water test in Ontario with Quinn Water Systems' expert guide. Ensure safe and clean well water for your home or business.
Call Us

Share this blog

Blog Posts

Well Water Ontario RottenEggSmell #HydrogenSulphide #OntarioHomeowners #WaterTreatment
By Quinn Tr June 16, 2025
Don't live with smelly water—fix it with help from your local water experts. Whether you’re in Markham, New Tecumseth, Caledon, or Muskoka, we’re here to help. 📞 Call or message us to book a FREE water test
well water filter water ontario faucet dog
By Quinn Tr June 2, 2025
Wondering how much a well water filtration system costs in Ontario? This guide breaks down installation pricing, system components, and smart ways to save—based on real local experience. Get clean, safe water without overspending.
Scarborough Family solves Hard Water & Chlorine Taste Issues
By Quinn Tr May 12, 2025
Our client immediately noticed: ✨ Softer showers, less soap scum ✨ Cleaner dishes and laundry ✨ Fresh-tasting water for cooking and drinking ✨ Peace of mind for their family’s health And the best part? These systems are low-maintenance, long-lasting, and backed by Quinn Water Systems’ expert support.
tap water filtration ontario gta Toronto
By Quinn Tr May 2, 2025
You trust your tap water… but should you? After testing water across hundreds of homes in Toronto & York Region—here’s what I discovered 👇
lake water treatment
By Quinn Tr March 31, 2025
If you live in Ontario and source your water from a lake—whether you're in Georgetown, Muskoka, Kawartha Lakes, or Haliburton—you might be wondering if a water softener is necessary. The truth is, not all water needs softening, but lake water comes with its own unique challenges that require a tailored treatment system.
Kitchener-Waterloo Has the Hardest Water in Ontario- Water filtration
By Quinn Tr March 25, 2025
If you live in Kitchener-Waterloo, you've probably noticed some issues with your water—white buildup in kettles, dry skin after showers, or even discoloured tap water. To truly fix Kitchener-Waterloo’s water issues, you need the right filtration system in place. Here’s what we recommend
More Posts