A nine-year-old girl was two metres away from a chemical explosion that occured in a clandestine methylamphetamine labratory in Maddington overnight, police said.

A man and woman have been charged with trying to manufacture the illegal drug.

Assistant Commissioner Stephen Brown said the child had been taken into custodial care.

He said she was found cowering in a bath tub, metres from the explosion.

"It was absolutely miraculous that child was not injured seriously or actually killed in the event," he said.

"So it is something that causes great concern."

It is the third incident a child has been found living in clandestine drug labratories in the past week.

Detective Inspector Alan Morton, of the serious and organised crime division, confirmed that children were living inside two of the clandestine methylamphetamine laboratories raided on Wednesday and Thursday last week.

In one of the six properties, drug manufacturing chemicals were discovered above a child's cot.

"It is absolutely disgraceful to consider that in Western Australia we have parents who are prepared to put their children as such significant risk all in the pursuit of some small amount of illicit drug," Detective Morton said at the time.

"It's absolutely disgusting however it just shows how people can be affected and their consideration for others is totally out of the window when it comes to them trying to get their next hit of drugs."

Last week police raided homes in Cooloongup, High Wycombe, Carramar, Wooroloo, Port Hedland and Canning Dam.

Organised crime detectives attended the raid at a High Wycombe house on Edney Road, where a woman and man were questioned.

The 38-year-old woman has since been charged with one count of attempting to manufacture methylamphetamine.

Police also found equipment to manufacture "home-bake" heroin at the Tableland Way home in Carramar.

Sixty-seven clandestine labs have been discovered so far this year and police say they are on track to reach 126, which was the number of labs dismantled last year.

Detective Morton said last year's figure was 500 per cent increase to the level of detection of drug labs, which he attributed to the greater education and assistance from the public.

"Clandestine drug labs are a danger to the community," he said.

"Those involved are not experienced chemists and they are mixing dangerous chemicals that are highly volatile and can explode, which we have seen happen too frequently in recent years."