These products should not go down the sink. Most toilet cleaners work by killing harmful bacteria in the toilet. They can also affect the helpful bacteria in sewage treatment plants, reducing their ability to clean up our waste water before it is discharged into the environment. Most heavy metals in waterways come from industrial wastes. They are also found in homes in a variety of products such as oil based paints and petrol.
Heavy metals can build up in animal and plant tissues and can be highly toxic.
They can also interfere with the ability of sewage treatment plants to clean up our waste water before it is discharged into the environment. Solids and plastics Floating plastic and other solids are not only ugly but also harmful. They may suffocate or choke birds, animals and fish and reduce the amount of light and oxygen available to aquatic life. Plastic rubbish is not biodegradable and persists for a long time in the environment. Use biodegradable and phosphate-free detergents and toilet cleaners.