Meth labs leave behind toxic chemicals that can poison a property long after the drug-making equipment has been dismantled. The chemicals can penetrate walls and fabrics and any waste disposed of on the property is highly toxic.
If the police have been involved, they call in the Environmental Science & Research response team of forensic scientists who remove chemicals and conduct tests. They must then alert the local council which can demand the property be tested and make a cleansing order under the Health Act 1956.
There is at present no legal obligation for owners to declare the methamphetamine history of a property to new tenants or potential buyers. There is also no obligation for them to have a property tested for traces of meth or chemicals.