Is the River Mersey Safe to Drink? No—Heavy Pollution Warning

No. The River Mersey is not potable. Despite massive cleanup since the 1980s (once "biologically dead"), it still carries:

• Combined sewer overflows (CSOs): Raw sewage during heavy rain.
• Industrial legacy contaminants: PCBs, heavy metals (Hg, Pb, Cd), PAHs in sediments.
• Urban runoff: Tire particles, hydrocarbons, microplastics, road salt.
• Pathogens: E. coli, Enterococci, norovirus—levels spike post-rainfall.

Health Risks

Ingestion can cause gastroenteritis, hepatitis, skin/eye infections, and long-term toxic exposure. Never drink untreated river water anywhere in the UK.

Safe Alternatives

• Tap water (strictly regulated by DWI).
• Commercial bottled water.
• If camping/hiking: boil 1 min, filter (0.2 µm), or chemical treat (chlorine dioxide).

The Mersey is now swimmable in stretches (e.g., Warrington, Liverpool Festival Gardens) when CSOs aren't active—check Surfers Against Sewage Safer Seas app for real-time alerts. But drinking? Absolutely not.