Intensive agriculture is polluting Europe’s waters

On certain summer days along the coast of Brittany in France, the sea turns bright green. Thick mats of algae wash up on the beaches, releasing a horrible smell as they decompose in the sun. These blooms are not natural. They are fuelled by nutrients that wash from nearby agricultural land into rivers and eventually the sea. In some cases, the gases released by the rotting algae have even been linked to the deaths of animals and people.

This is just one visible example of a much wider problem.

Agriculture under pressure

Over the past decades, European agriculture has increasingly relied on intensive farming methods that use large quantities of chemical fertilisers, pesticides, and manure. While these practices have boosted food production in the short term, they have also placed heavy pressure on natural resources. Excess nutrients, such as nitrogen and phosphorus, end up in rivers, lakes, and coastal waters, causing widespread pollution. In the long term, this pollution harms agriculture itself: healthy soils, clean water, and functioning ecosystems are essential for sustainable food production.

Tap water at risk

When excess fertilisers and manure seep into groundwater, they can directly affect human health and access to safe drinking water. In parts of Spain, for example, hundreds of thousands of residents temporarily lost access to safe tap water because nitrate levels in groundwater exceeded health limits. In Catalonia and other intensive livestock farming regions, authorities have repeatedly warned that groundwater pollution from nitrates threatens drinking water supplies and creates expensive treatment costs for municipalities. Similar problems are found in many agricultural regions across Europe.

Nature-friendly solutions  

The bright side? All of this is evitable. Sustainable farming methods, such as agroecology and organic agriculture, allow farmers to grow food while protecting nature, healthy soils, and water.

For example, planting legumes like beans or clover can naturally add nitrogen to the soil, while livestock systems that recycle nutrients locally can reduce dependence on synthetic fertilisers. Other practices, such as planting buffer strips near rivers and restoring wetlands, help prevent fertiliser and manure from washing into rivers and lakes. These practises also help restore ecosystems, protect wildlife, and maintain resilient rural communities, all while ensuring food production for the future.

The danger of weakening environmental protection

The EU already has long-established laws to protect water and nature, including the Water Framework Directive, the Nitrates Directive, and the Birds and Habitats Directives. Yet across Europe, agricultural pollution remains widespread, largely because these rules are insufficiently implemented and enforced. Recent court rulings against Belgium and the Netherlands over failures to control nitrate and nitrogen pollution from intensive agriculture highlight that enforcement gaps remain a serious problem. It shows that governments are still failing to properly apply existing environmental laws.

Instead of tackling pollution through better enforcement, some EU countries, alongside powerful polluting industry sectors and their political allies, are pushing to weaken environmental rules. Framed as efforts to simplify regulation and reduce administrative burdens for businesses, these proposals will weaken environmental safeguards, reduce reporting and accountability requirements, and make it harder to monitor pollution. This risks undermining decades of environmental progress at a time when Europe is already struggling to meet its water quality, biodiversity, and climate goals.

Weakening safeguards would put ecosystems, public health, and our long-term ability to produce food at risk. What is urgently needed is better implementation and enforcement of existing laws. Farmers also need to be better supported in transitioning to sustainable farming models and taking caring of nature. Our health, the survival of rural communities, and the resilience of our food systems all depend on it.

Citizens across Europe are calling on EU leaders to defend, not weaken, environmental protections. You can add your voice by signing our petition to urge decision makers to protect Europe’s water, nature, and environmental laws for future generations.

Photo: Shutterstock
Written by Caroline Herman