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Station 2 - Filtering marshes

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Station 2 - Filtering marshes

Natural water purification

Discharging untreated wastewater into the St. Lawrence River and Québec’s other waterways contributes to the deterioration of our ecosystems while limiting public access to those same waterways. In addition to bringing life to some 27,000 plant and animal species, the St. Lawrence is the main source of drinking water for almost half of Québec’s population.

Sedentary lifestyles and human activity have quickly led to localized water pollution through industrial, domestic and agricultural runoff.

Filtering marshes are an alternative to septic tanks, leach fields and sewer system disposal. They offer numerous advantages: they are affordable, require little maintenance, do not require any chemicals, provide habitats for local fauna, do not adversely affect the landscape and require little or no energy. What’s more, they are entirely natural systems, although man-made.

Filtering marshes use the purifying properties of aquatic plants, as well as naturally present bacteria and fungi, to transform harmful substances such as animal waste, pesticides and other chemicals into non-toxic matter before they enter bodies of water such as ponds, streams, rivers or lakes.

Did you know that...

The Botanical Garden’s scientists were the first to introduce filtering marshes in Québec in the 1990s. These marshes are still in use at the Jean Doré beach and the Biosphere, where wastewater from the museum’s toilets and sinks are filtered.

The Pathway to Phytotechnologies and its Filtering Marshes

The Aquatic Garden, designed over 80 years ago by Henry Teuscher, offers a new phytotechnology feature: filtering marshes. A collection of aquatic plants found in two filtering marshes will purify the organic and fertilizing matter from the garden’s main water basin. Visitors will discover this natural and highly performing alternative to traditional methods.

The Filtering Marshes station is made possible thanks to generous gifts from RBC and the Quebec Mining Association.

Logos - Station 2 - Les marais épurateurs

The Filtering Marshes station is made possible thanks to generous gifts from RBC and the Quebec Mining Association.

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