Contaminated Soils: 3 Reasons to Soil Test

By Karine Dutemple

Updated on September 6, 2024

Whether it be chemicals, heavy metals or organic matter, the presence of contaminants in soil is rarely good news. However, ignoring the problem can have serious consequences. The question then is: why should you have a soil test carried out?

Soil Testing: 3 Reasons Why

plante qui pousse dans le sol_Soumission Rénovation_plant growing in the ground

1) To confirm or dispel the presence of contaminants

Basically, a soil study confirms or disproves the presence of contaminants in the soil and identifies its nature. Generally, the pollutants that are identified are:

  • chemicals (such as pesticides);

  • organic matter;

  • heavy metals;

  • hydrocarbons.

For example, the main contaminants found in residential areas include coal deposits, fuel oil, fire ash, industrial embankments and waste materials. Unfortunately, their presence is a reflection of another era, when the regulations governing the management of their residues were not very strict. In some cases, faulty equipment or an accidental spill may also be implicated.

Of course, confirming the presence of contaminants in the soil allows the process of decontaminating and rehabilitating the land as quickly as possible. Doing so tends to limit the impact of contaminants on the environment and avoid long-term damage.

While this does not call into question the importance of having a soil analysis done, some Canadian provinces have their own directory of contaminated land.

In Quebec, the Ministry of Environment and the Fight against Climate Change makes available to the public information brought to its attention concerning contaminated land on its territory. To access it, click here.

In Ontario, you can find documentation about contaminated lands and brownfields here.

In Nova Scotia, there is a special section on the government's website here

Alberta has the Environmental site assessment repository here.

2) To get a mortgage

maison avec clés_Soumission Rénovation_house with keys

Thinking of building your future home? To be able to make this large-scale project a reality, you will first need to determine its location and therefore identify a land lot of sufficient size to meet your acreage needs. However, keep in mind that many other factors need to be considered before making a definitive decision on a particular field.

Among these is a very important element: the presence of healthy soil. Not only is its presence essential to ensure the sustainability of the building that will be built on the ground, but it is also a legal obligation.

Indeed, your financial institution may ask for irrefutable proof that your land is not contaminated before you can be granted a mortgage. In this regard, it should be noted that even in the context of a sale without a legal guarantee, an environmental assessment may be required to eliminate the possibility that contaminants may be present in the soil.

Moreover, this precaution ensures the viability of the investment and avoids the financial problems that could arise from construction on contaminated land. It should be noted that the test that is required will be phase 1, which is the one used to identify potential or actual risks relating to the presence of contaminants. Finally, it should be noted that the test is valid for 5 years. Therefore, if such an assessment was done less than five years ago, it is still valid.

3) To avoid buying a home on contaminated land

As we mentioned in the previous point, conducting a soil test can be an obligation that you will have to pay if you want to buy land. Thereby, this requirement will also apply to a property already built.

In this context, it should be noted that buying a house without regard for soil conditions can cause a very large number of problems if one or more contaminants are found in the soil. This will result in a long-running battle between buyers and sellers to avoid having to pay the costs required for soil decontamination.

Buyers will then have to prove that there is a hidden defect and the sellers will have to prove the opposite. Besides, the steps required by insurers to obtain compensation can be tedious and not always conclusive.

Once again, you should not believe that selling without a legal guarantee will protect you from lawsuits. Indeed, a prosecution motivated by the discovery of what could be considered in court as a hidden defect cannot be ruled out.

It is therefore intended to avoid all the problems caused by the presence of contaminated soil that a soil test must be carried out. After all, as the saying goes: better safe than sorry!


Get 3 free quotes for your project!

Submit a project and get 3 free quotes!

Looking for something else?

Table of contents

4 min read

Find contractors near you

Enter your postal code



Related articles

The latest industry news, interviews, technologies, and resources.

4 min read

Cynthia Pigeon

18 May 2026

Improving Your Home: Combining Comfort, Health, and Durability

Renovating a home goes far beyond refreshing a room or replacing outdated materials. It is part of a more thoughtful process, shaped by both personal taste and long-term planning. Whether you live in a detached house, townhouse, condo, or shared ownership property, rethinking your living space means creating a place where comfort, health, and durability work together.

Renovation tips
6 min read

Amanda Harvey

09 Jul 2026

When is a building permit required in Toronto? | Renovation Quotes

Undergoing any form of home renovation is a huge venture that requires time, energy and patience. Of course, you can’t just grab a hammer and some nails and begin your renovation tomorrow, as plenty of preparation and planning must be fulfilled. If you are renovating a home in the city of Toronto, there are numerous regulations and bylaws that must be considered before performing any type of structural changes or otherwise.

4 min read

Christine Simard

08 Nov 2023

5 tips to decorate your kitchen

In the kitchen, it’s safe to say that messes and stains are quite common occurrences. If you’re anything like me, things tend to pile up or get misplaced and it’s hard to keep the place looking magazine-worthy 24/7. 

6 min read

Editorial Team

13 Jul 2020

10 Dream Bedrooms for Children

A child’s bedroom is a room in the house where people dare to give free rein to their imagination, offering it to the little ones who live there. It’s a place where you can dare to experiment with bright colours, dynamic patterns and furniture that invite play.

9 min read

Cynthia Pigeon

18 Jul 2026

How Much Does Asbestos Abatement Cost per Square Foot in Canada?

For buyers of older homes, property managers, or homeowners planning major renovations in Canada, the word “asbestos” often raises concerns. Asbestos was widely used in various Canadian building materials, particularly before 1990, because of its insulating, fire-resistant, and durable properties.