Nitrites and nitrates in water

Nitrites and nitrates in water are classified as nitrogen pollutants. Although they occur naturally in the environment, they are mainly introduced in significant quantities by human activity through agriculture, wastewater treatment, and industrial activities.

In addition, nitrites are used by the food industry as a preservative in processed meats. However, they also enter ecosystems through the natural process of organic matter degradation, such as plants or leaves. The presence of nitrites in water often indicates organic pollution, which may be due to the presence of urine or feces.

Nitrates are an essential nutrient for plant growth. Their excessive presence in water comes from livestock farming and intensive agriculture. Nitrogen fertilizers are broken down into nitrates by bacteria in the soil.

Risks associated with the presence of nitrites and nitrates in water

Nitrites are classified as probable carcinogens. They are found in high concentrations in processed meats and, in an acidic environment (such as the stomach), they form proven carcinogenic by-products. A study of more than 100,000 people found an increased risk of type 2 diabetes in people who consumed nitrites, including those found in processed meats.

This is why their content in drinking water is regulated. The same applies to nitrates, as they can be converted into nitrites.

Excessive concentrations of nitrates in water are also a proven source of pollution. They have a harmful effect on aquatic life, promoting the proliferation of harmful algae that reduce oxygen levels, but also on human health. They are responsible for various diseases, including certain forms of cancer.

The action of activated carbon filters on nitrites/nitrates

Activated carbon reduces nitrite and nitrate levels in water. However, it cannot reduce them completely on its own. Our Ultimate Star Filter® has been tested with an efficiency of around 40%. Analyses carried out on certain activated carbon filters that claim to reduce nitrates by more than 90% should be treated with caution. As things stand, this is simply impossible...

We provide real figures, but we are also working on the design of a complementary filter that will be effective against nitrites and nitrates, to be used in addition to our main filter.