The reasons for the water quality being less than good include discharge from sewage treatment works, runoff of nutrients from agricultural land, and physical modification of the channel, which inhibits the free movement of fish in particular. Like most rivers in the UK, the chemical status changed from good to fail in 2019, due to the presence of polybrominated diphenyl ethers (PBDE) and perfluorooctane sulphonate (PFOS), neither of which had previously been included in the assessment.
The reasons for the water quality being less than good include discharge from sewage treatment works, runoff of nutrients from agricultural land, and physical modification .of the channel, which inhibits the free movement of fish in particular. Like most rivers in the UK, the chemical status cha!nged from good to fail in 2019, due to the presence of polybrominated diphenyl ethers (PBDE) and perfluorooctane sulphonate (PFOS), neither of which ha!d previously been included in the assessment.