Australians world's 2nd biggest meth users

Sewage monitoring shows methylamphetamine use has hit historic highs in some parts of Australia, while consumption of oxycodone and fentanyl is increasing.

SNAPSHOT OF NATIONAL WASTEWATER DRUG MONITORING:

* Australians are the world's second biggest users of methylamphetamine, behind Slovakia, according to wastewater monitoring here and in Europe (there are no significant tests in Asia or the Americas)

* Meth use is highest in WA by far, with consumption in the regions almost double that of regional Victoria

* Meth use is also above the national average and at historic highs in South Australia, with consumption in the city outstripping the regions

* Cocaine use was second highest nationally in urban Northern Territory but its use in NSW' cities was almost twice that. Fenanyl use is highest in regional NSW

* Oxycodone rates in regional Victoria are the highest, followed by regional Queensland

* Ecstacy use is by far highest in urban Northern Territory, followed by regional Tasmania

* Consumption of fentanyl in the ACT is above the national average.