Have you noticed an orange or reddish gelatinous buildup in your foundation drain, sump pit or near a pump? It could be iron ochre.
This phenomenon can affect drainage system performance and contribute to basement moisture problems. Lab’Eau-Air-Sol analyses suspect deposits to look for iron bacteria.
About the analysis
Understanding iron ochre deposits
What is iron ochre?
Iron ochre is a deposit that is generally orange, reddish or brownish and consists, in part, of iron compounds. It forms when iron in soil and groundwater reacts under favourable conditions.
Deposits may appear viscous or gelatinous and accumulate in foundation drains, sump pits and around pumps.
Chemical and biological formation
Iron ochre can form through a chemical process, a biological process or a combination of both.
The chemical process involves the oxidation of iron dissolved in water, causing deposits to form. The biological process involves iron bacteria naturally present in the environment.
These bacteria can accelerate deposit formation and contribute to larger accumulations.
Possible effects on drainage
A significant buildup of iron ochre can reduce water drainage capacity and contribute to clogged drains.
The resulting water infiltration and excessive moisture can create conditions favourable to mould growth.
Iron ochre itself is not considered a health hazard. The main concerns are its potential effects on drainage and moisture in the building.
What does the analysis involve?
Lab’Eau-Air-Sol examines sludge or deposit samples in the laboratory, including samples from foundation drains and sump pits.
The analysis looks for iron bacteria associated with the biological formation of iron ochre.
Can the risk of iron ochre formation be assessed?
Analysing a deposit documents the presence of iron bacteria. However, on its own, it cannot predict future accumulation or drain blockage.
A more complete assessment may require a qualified professional to examine soil characteristics, groundwater and drainage conditions.
When should you request this analysis?
Analysis may be useful when suspect deposits are observed in the drainage system of a home or another building.
- You observe orange or reddish sludge in a sump pit or foundation drain.
- You notice recurring deposits near your pump or in your sump.
- You suspect an iron ochre problem and want to check for iron bacteria.
- You would like information about analysis procedures or costs.
Sampling
How do you collect a sample?
Consult our sampling instructions for information on the amount of material required, preservation conditions and how to submit it.
Sampling methods
Find instructions for preparing and submitting your samples.