New regulations on hazardous waste come into force next month.
Because of their chemical content, some everyday household and businesses items such as computer monitors, televisions and fluorescent tubes have joined the list of toxic, corrosive and irritant substances.
It means most small businesses will find themselves producing hazardous waste for the first time.
The legislation comes into effect on July 16.
Ben Bradshaw, Minister for local environmental quality, said: "It is essential that businesses act now."
Advice on how to handle waste is available from the Environment Agency's campaign group Envirowise. Contact the helpline on 0800 585794, or visit the website, www.hazardouswaste.org.uk
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