Pollution: Protecting Our Water from Everyday Impacts

Water pollution is one of the most pressing challenges facing our lakes, rivers, and oceans. It occurs when harmful materials—such as plastics, excess nutrients, or household waste—enter waterways, affecting the health of ecosystems and communities that rely on them.

Plastics & Microplastics

Plastics are the most widespread type of litter in aquatic environments. According to the United Nations, plastic pollution in oceans is expected to triple by 2040 if no action is taken. Once in water, plastics degrade into microplastics—tiny fragments less than 5 mm in size—which have been found in 83% of tap water samples globally and in aquatic species consumed by humans.

In the Great Lakes alone, researchers have detected concentrations of up to 1.1 million microplastic particles per square kilometre of surface water.

Oil Spills & Urban Runoff

Oil and grease from roads, parking lots, and vehicles are frequently washed into storm drains during rainfall events. This urban runoff is one of the leading sources of water contamination in developed areas. Even one litre of spilled oil can contaminate up to one million litres of water, harming aquatic life by reducing oxygen exchange and coating fish gills and plant surfaces.

Excess Nutrients from Land Use

Fertilizers rich in nitrogen and phosphorus are used to promote plant growth, but when excess nutrients wash off into rivers and lakes, they can lead to algal blooms. In 2014, a massive algal bloom in Lake Erie—fueled by nutrient runoff—left 500,000 people in Toledo, Ohio without safe drinking water. These blooms can also result in “dead zones” where aquatic life struggles to survive due to depleted oxygen levels.

Household and Everyday Sources

Even routine activities at home can have long-term effects on water systems. Studies by Environment and Climate Change Canada have found that trace levels of pharmaceuticals, personal care products, and cleaning agents are now commonly detected in wastewater effluent and nearby waterways. Many of these substances are not fully removed by conventional treatment and can persist in the environment for years.

What You Can Do

We all play a role in protecting water quality. Even small changes at home and in our communities can make a real difference. Here are specific actions you can take—and how they help:

🧴 Cut Back on Single-Use Plastics

How it helps:
Plastics don’t biodegrade; they break down into microplastics that contaminate drinking water and aquatic food chains. Over 8 million tonnes of plastic enter the oceans each year (UN).

What to do:

  • Carry a reusable water bottle and shopping bag.
  • Choose products with minimal or no plastic packaging.
  • Avoid microbeads in personal care products (look for “polyethylene” or “polypropylene” in the ingredients).

🌱 Support Green Infrastructure & Native Planting

How it helps:
Rain gardens, permeable pavements, and native plants reduce stormwater runoff, which carries pollutants into waterways. These features filter water naturally before it reaches local rivers and lakes.

What to do:

  • Plant native vegetation to absorb rainwater.
  • Advocate for green infrastructure in schools and parks.
  • Redirect downspouts to a rain garden if you’re a homeowner.

💊 Dispose of Medications & Chemicals Properly

How it helps:
Pharmaceuticals and household chemicals flushed down drains may end up in drinking water. A 2023 Canadian study found trace levels of antidepressants and painkillers in nearly 50% of tested urban waterways.

What to do:

  • Return unused medications to a pharmacy take-back program.
  • Use household hazardous waste depots for cleaners, paints, or oils.

🚜 Support Sustainable Land Practices

How it helps:
Excess nutrients from land use can fuel algal blooms and threaten aquatic health. Responsible practices improve water quality and habitat.

What to do:

  • Support farms and companies using 4R Nutrient Stewardship (Right source, rate, time, and place).
  • Advocate for wetland preservation and restoration.
  • Encourage planting of buffer strips along waterways.

🚮 Join or Organize a Community Cleanup

How it helps:
Preventing litter from reaching storm drains protects aquatic ecosystems. In 2022, the Great Canadian Shoreline Cleanup collected over 125,000 kg of garbage.

What to do:

  • Join cleanup events through Ocean Wise, A Greener Future, or Water Rangers.
  • Bring gloves and a bag when hiking or visiting parks to pick up litter.
  • Organize a local cleanup at your school, workplace, or neighborhood.

📣 Speak Up & Stay Informed

How it helps:
Policy decisions around development, conservation, and industry directly impact water quality. Being informed helps ensure responsible water stewardship.

What to do:

  • Follow environmental organizations and Indigenous water protectors.
  • Support leaders or policies that protect water.
  • Share facts, tools, and resources with others to raise awareness.