Year-round swimmers call for water quality testing beyond summer season

Danish outdoor swimming groups are urging municipalities to test water quality year-round, not just during the official bathing season from June to September, DR reports.

With climate change extending the swimming season and thousands of Danes taking winter dips, many are unaware of potential water contamination risks outside the monitored period. The Danish Outdoor Council (Friluftsrådet), an umbrella organisation for over 80 member groups, argues that current EU bathing water directives fail to address year-round swimming trends.

“Citizens don’t care whether it’s early September or early October—if they’re swimming, they want to know the water is clean,” said Sune Rønne Møller, a consultant with the council. He noted that while EU rules require testing only from June 1 to September 15, “it’s hard to justify why we only focus on clean bathing water for 3.5 months, then stop monitoring entirely.”

Winter swimming has surged in popularity, with clubs like Rantzausminde Havbadeforening in Svendborg—boasting over 700 members and a 200-person waitlist—using apps to track sewage overflows near their bathing sites. “There can be pipe breaks or overflows releasing coliform bacteria into the water,” said club chair Kjeld Hansen. “UV light breaks down bacteria in summer, but there’s less of it in winter, so risks remain.”

Svendborg Municipality already tests water year-round at Blue Flag beaches and urban swimming spots, using an app that updates every 15 minutes. “If there’s an overflow, we’re alerted and put up red flags,” said Linne Marie Helge, project manager at Svendborg Spildevand. The municipality also collaborates with tourist offices, hotels, and schools to share water quality updates.

The Danish Environmental Protection Agency confirmed that EU directives are unlikely to change, leaving it to individual municipalities to decide whether to expand testing. “It’s a political decision whether Denmark wants to make year-round testing mandatory,” the agency stated.