Writer Sarah Butler, volunteering with Project Ripple Effect, discovered catastrophic ammonia pollution in the River Grom near Royal Tunbridge Wells, Kent, finding zero surviving invertebrates during testing. Despite alerting the Environment Agency (EA) for months, the destruction highlighted regulatory failures. Citizen scientist groups have proliferated across England amid scandals over sewage pollution by water companies and EA downgrading of incidents.

Only 14.3 per cent of waterways in England and Wales meet minimum European standards. John Pritchard of the Ver Valley Society in St Albans said citizen science reveals widespread pollution the EA misses. Since 2009, the EA cut water quality tests, adopting "operator self-monitoring" relying on water company data from electronic monitoring devices (EMDs) that measure spill frequency but not effluent volume.

Over 7,000 emergency overflow pipes lack EMDs until 2035. In 2025, sewage was released nearly 300,000 times. Former EA officer Robert Forrester, a whistleblower, found 98 per cent of 2,778 serious pollution incidents in 2024 were downgraded to minor.

Officers attended 496 incidents before downgrading; the rest were deemed minor on company evidence alone. Citizen scientists now fill the monitoring gap, but EA response remains inadequate.