Cost and turnaround time

Water sample

  • $325, plus $100 if sampled by Multitest.

Soil sample

  • $325, plus $170 if sampled by Multitest.

Turnaround time

  • 2 to 5 business days

Questions? Appointment?

You can call us at 514 990-2063 or fill out the form below and we will contact you as soon as possible.

Test quality and credibility

The test has greater credibility if the samples are taken by Multitest—this guarantees the traceability of samples referenced in the written report.

The laboratory is ISO 17025 accredited. Multitest as well as the laboratory are covered by errors and omissions liability insurance.

What is it?

Whether biological (bacteria in the soil react to iron) or chemical (oxidation of certain minerals in the soil), the formation of iron ochre (also called ochre deposits) can clog the French drain (weeping tile). This clogging could lead to excessive humidity around the foundations which can lead to mold growth inside the building. The test consists of analyzing a water sample taken from the sump pump or a soil sample to determine whether there is a risk of clogging the French drain.

Learn more about our iron ochre tests

Iron ochre test details

The laboratory takes into account bacteria concentration, pH and ferrous and ferric ion concentration to determine the clogging potential of the French drain. Based on current scientific knowledge, it is difficult to predict the amount of iron ochre that will form, the degree of reaction in a given location, and the extent and duration of the problem.

BNQ standard and other assessments

The Bureau de normalisation du Québec (BNQ) has published standard BNQ 3661-500 on diagnosing potential iron ochre problems. A complete diagnosis cannot be made solely based on the chemical analysis test that we offer. While the BNQ recognizes the results of the chemical analysis test, we recommend combining these test results with field assessments made in accordance with the BNQ standard. Although these assessments are costly, they are recommended because they take other factors into account such as ground slope, soil composition, water table, etc.

FAQ on iron ochre testing

What is an iron ochre test?

Whether biological (bacteria in the soil react to iron) or chemical (oxidation of certain minerals in the soil), the formation of iron ochre (also called ochre deposits) can clog the French drain (weeping tile). This clogging could lead to excessive humidity around the foundations which can lead to mold growth inside the building. The test consists of analyzing a water sample taken from the sump pump or a soil sample to determine whether there is a risk of clogging the French drain.

Can i choose a testing time?

No. We will contact you the business day before the test to confirm an appointment time.

How long will your technician be on site?

Approximately 30 minutes.

If my test result is positive, is it a problem?

This confirms that there is a clogging potential. The important thing is to regularly check that the French drain is functional and in good condition by means of a camera examination (approximately $500 if accessible without excavation). If there is a clog, a pressure cleaning (with or without gas) will be necessary (approximately $500 if there are cleaning chimneys). We do not offer inspection and cleaning services, but can refer you to contractors if necessary.

If my test result is positive, how often should my drain be cleaned?

Depending on the degree of clogging potential (low, medium or high), the time between cleanings can vary from approximately 6 months to 3 years.

How should i take my sample?

Please contact us for the recommended method and precautions.

Do you carry out remediation work if the test result is positive?

We do not perform this type of work. However, we can refer you to contractors if necessary.

Some testimonials from our clients

“I highly recommend Multitest. They took the time to give me good advice as I dealt with a delicate situation. I felt supported and 100% confident with this team. Rigor, efficiency in communications, respect for the estimate. A great experience.”

Daphné Caron, Google review, Greater Montréal

“Thank you for taking the time to explain to me, for your wise advice and your references for corrective work!”

Caroline Gauthier, Google review, Greater Montréal

“Great service from Mr. Forest. Multitest took the time to answer my questions and provide relevant information for the good of our organization. Impeccable!”

Patricia Dubois, Google review, Greater Montréal

“I want to thank all your team for your excellent service! With tight delays having major impacts on our transaction, I sincerely appreciate all the efforts to obtain our expertise report. Thanks to you, we saved three days and the buyers will be able to take possession of their house on time (very important element for them). You saved our transaction!”

Jean-Simon Roy, real estate broker │ Royal LePage Humania Centre

“Many thanks for your excellent service and the speed of your results. I regularly refer Multitest to my clients and this file confirms once again why I recommend you.”

Stéphane Dufour, building inspector │ L’inspecteur Urbain – building consulting services

Main areas served by our iron ocher testing experts

North Shore of Montreal

We serve the North Shore of Montreal, including Laval, Mascouche, Terrebonne, Mirabel, Saint-Jérôme, Le Gardeur, Deux-Montagnes, Saint-Eustache, Pointe-Calumet, Saint-Joseph-du-Lac, Sainte-Marthe-sur-le-Lac, Blainville, Boisbriand, Bois-des-Filion, Lorraine, Rosemère, Sainte-Anne-des-Plaines, Sainte-Thérèse, Charlemagne, L’Assomption, Repentigny, Saint-Sulpice and L’Épiphanie.

City of Montreal

We serve the greater city of Montreal, including the following boroughs: Ahuntsic-Cartierville, Anjou, Côte-des-Neiges–Notre-Dame-de-Grâce, Lachine, LaSalle, Le Plateau-Mont-Royal, Le Sud-Ouest, L’Île-Bizard–Sainte-Geneviève, Mercier–Hochelaga-Maisonneuve, Montréal-Nord, Outremont, Pierrefonds-Roxboro, Rivière-des-Prairies–Pointe-aux-Trembles, Rosemont–La Petite-Patrie, Saint-Laurent, Saint-Léonard, Verdun, Ville-Marie and Villeray–Saint-Michel–Parc-Extension.

South Shore of Montreal

We serve a large portion of Montérégie, including Longueuil, Greenfield Park, Saint-Hubert, Brossard, Belœil, Boucherville, Candiac, Carignan, Chambly, Châteauguay, Delson, La Prairie, McMasterville, Mont-Saint-Hilaire, Otterburn Park, Saint-Basile-le-Grand, Saint-Bruno-de-Montarville, Sainte-Catherine, Saint-Constant, Saint-Isidore, Sainte-Julie, Saint-Lambert, Saint-Philippe, Saint-Jean-sur-Richelieu and Varennes.