Recent rainfall across the United Kingdom may be causing tap water to develop a 'musty' or 'earthy' taste, according to Dr. Bill Simpson, a chemist at Our Taap. This phenomenon is a natural occurrence when dry periods are followed by heavy precipitation.
The increased rainfall can overwhelm water treatment processes. Flooded drains can contaminate natural water sources with organic matter, pollutants, and a higher concentration of microorganisms. These can include antibiotic-resistant strains, posing challenges for water treatment facilities.
Dr. Simpson explained that heavy rain can lead to an increase in disinfection by-products, specifically trihalomethanes. These form when chlorine, used to disinfect water, reacts with the organic matter present in the runoff. The formation of these by-products can impart 'inky,' 'plastic,' or 'musty' notes to the water.
In some instances, households might notice a stronger chlorine odor. This is because treatment plants may increase chlorine levels to combat the higher microbial load in the water.
Despite the potential change in taste or smell, Dr. Simpson reassured the public that the tap water remains safe to drink. "We've pretty much eliminated the chance of getting sick from drinking tap water in this country," he stated. The taste and odor compounds are difficult to remove completely but do not pose a health risk.
The UK has recently experienced a significant dry spell, with drought conditions declared in several parts of England. The arrival of frequent showers is providing much-needed relief but also contributing to the temporary alteration in water quality perceptible to consumers.