Blue-Green Algae

Metro tackles the problem at the source by helping you fight against blue-green algae.

You have no doubt heard about the harmful effects of phosphates. Present in many household products, phosphates stimulate the development of toxic algae (blue-green algae) and the consequences impact us directly.

Metro attacks phosphates

In addition to directly impacting our way of life, this environmental problem has increased dramatically. For this reason, Metro has developed in-store signage that allows you to easily identify phosphate-free products to help you make informed choices.

Please note that all laundry detergents sold in Metro stores are phosphate free.

Phosphorus or phosphate?

Phosphorus is an essential element of life. In itself, it is non toxic. However, in excess, it causes the eutrophication of the waters in lakes and streams (eutrophication being the process by which a body of water becomes rich in dissolved nutrients producing an oxygen deficiency). Phosphate is the form under which phosphorus can be assimilated by living organisms, particularly algae.

Simple actions

As consumers, we can contribute to the preservation of our fish and waterways by undertaking simple actions. Remember that wastewater treatment systems are conceived to eliminate human waste, not toxic substances.

Use phosphate-free detergent products. It is now possible to find phosphate-free products without compromising effectiveness.

Avoid waste by limiting the number of wash loads you do and the amount of detergent you use.

Never discard products such as insecticides, herbicides, paint or solvents that carry a warning label down a drain or sewer. These products should be taken to the nearest household waste disposal and recycling centre. Service stations accept and recycle used motor oil. Medication that has passed the expiration date can be returned to pharmacies where they will be disposed of appropriately.

Clean driveways and walks by sweeping rather than watering as refuse, dust and toxic materials will end up in sewers and ultimately in lakes and streams.

Opt for natural methods rather than chemical pesticides to get rid of insects.

Reduce water run off by keeping your grass very thick and by planting shrubs.

Reduce watering of the lawn to a minimum. Plant grass and indigenous plants adapted to the local climate since they require less water than exotic varieties. Indigenous plants are also more resistant to local insects.

Sources : Greenpeace, Colloque écocitoyen portneuvois, Environment Canada, Agence de la santé publique du Canada, Service de l’environnement de la Ville de Montréal, CIPEL (Commission internationale pour la protection des eaux de Lac Léman).