Lake Gregory in Nuwara Eliya and Beira Lake in Colombo are severely polluted with sewage, agricultural runoff, and industrial waste, posing health risks to visitors and locals despite their ecological and recreational importance.
Two of Sri Lanka's most significant urban water bodies are struggling with severe contamination that threatens both public health and their ecological value. Lake Gregory, situated in the hill country near Nuwara Eliya, and Beira Lake in Colombo have become polluted despite their historical importance and current roles as tourist attractions and wetland ecosystems.
According to the Central Environmental Authority, Lake Gregory's water quality has deteriorated significantly due to agricultural chemicals, pesticides, fertilisers, and urban wastewater runoff. University studies have identified sewage, domestic waste, and organic matter as primary pollution sources. Beira Lake faces similar challenges, with untreated sewage, illegal connections, industrial discharges, and solid waste contaminating its waters. Recent research has revealed excessive organic pollutants, nutrients, and in some areas heavy metals in Beira Lake, which has triggered algal blooms responsible for its distinctive green appearance.
The pollution poses particular concerns given the lakes' current use. Lake Gregory remains a major tourist destination where thousands enjoy recreational activities including boating and water sports, often unaware of health risks. District officials have raised questions about whether authorities should issue public warnings about water quality, yet no official alerts have been issued to date.
Addressing the pollution requires identifying and eliminating sources of contamination, experts emphasise. Several government agencies, including the Ministry of Environment, Urban Development Authority, and Irrigation Department, have reportedly begun developing remedial measures. However, timelines remain unclear. International examples from Sweden, Switzerland, and Singapore demonstrate successful urban lake management, but observers note that Sri Lanka's efforts will ultimately depend on sustained political commitment to implement solutions.
