Iron Ochre
Causes, Consequences & Long-Term Solutions in Quebec
Have you noticed orange, slimy sludge near your French drain or in your sump pit?
This is most likely iron ochre. At SOS Sous-sol, Quebec specialists in drainage and water infiltration, we help homeowners understand this hidden problem and provide long-lasting solutions to protect their foundations.
What Is Iron Ochre?
Iron ochre is a rust-colored deposit caused by iron in groundwater combined with natural iron bacteria. When exposed to air or under certain drainage conditions, this bacteria oxidizes the iron, creating a thick orange sludge that clogs French drains and sump systems.
Why Is It a Problem in Quebec?
In many parts of Quebec—especially the Laurentians, Lanaudière, and Montreal’s North Shore (Blainville, Terrebonne, Saint-Jérôme, and beyond)—iron-rich soils and high water tables make properties more vulnerable. Since iron ochre remains poorly understood, it often leads to serious and costly foundation damage.
Consequences of Iron Ochre
Blocked French drain and sump pump
Basement water infiltration
Hydrostatic pressure against the foundation walls
Reduced lifespan of the drainage system
Signs You May Be Affected
- Orange or brown water in the sump pit
- Slimy buildup in the pump or pipes
- Poor drainage around the foundation
A drain camera inspection is the best way to confirm the presence of iron ochre.
Solutions Offered by SOS Sous-sol
Our team has developed specialized expertise to tackle iron ochre permanently.
Our solutions include:
- Drain & sump camera inspection – locating blockages, low spots, and connections.
- Targeted cleaning – high-pressure jetting where needed.
- Correction plan – improving surface drainage, correcting slopes, managing downspouts, and adding preventive measures.
- Scheduled maintenance – inspections every 1–5 years depending on site conditions.
- Drainage system replacement – in severe cases, replacing the French drain with a system designed for iron ochre.
Note: Some hybrid or specialized treatments exist. We evaluate these on a case-by-case basis after inspection and testing, as complements to cleaning and drainage improvements.
Mirabel
Saint-Eustache
Rosemère
Saint-Jérôme
Sainte-Marthe-sur-le-Lac
Blainville
Boisbriand
Sainte-Thérèse
Deux-Montagnes
Laval
Lanaudière
Montreal’s North Shore
Why Choose SOS Sous-sol?
Recommended
by CAA-Quebec
Accredited
by APCHQ
Certified specialists in drainage and foundations
100+ five-star Google reviews and a transparent process
Trusted by major insurance companies
Fast, turnkey, and personalized service
International training and expertise
Request an Inspection Now!
If you suspect a problem with iron ochre, don’t wait until it’s too late. Contact us today for a professional inspection.
Get an estimate or a complete health check of your French drain.
FAQ About Iron Ochre
Is iron ochre dangerous to health?
No, it is not toxic, but it can cause severe damage to drainage systems.
Can all drains be cleaned?
Most of them, yes—except in cases where the drain is too deteriorated or collapsed.
Can iron ochre be prevented?
Yes, through regular inspections, proper maintenance, and the installation of an electrochemical system.
