'High' Tide on England's South Coast

It's not only raw sewage, going into the coastal waters of the South of England! Portsmouth and Brunel University London have analysed numerous water samples taken across Chichester and Longstone harbours (Kent). They found high levels of potentially dangerous chemicals, including recreational drugs, antidepressants and pesticides (https://www.theguardian.com/environment/2023/jun/09/high-levels-drugs-water-pollution-study-england-south-coast). Environmentalists are concerned about the possible effects of some these chemicals on marine life. For example, it's well-established that oestrogens (in contraceptive pills) can feminise male fish. There's obviously much scope for evaluating possibilities in this area.