POLICE deny they are fighting a losing battle on out-of-control parties despite a third weekend in a row of drunken fuelled chaos across WA.

At least 10 parties required police attendance between 9pm and 1.30am on Saturday night from Burns Beach in the northern suburbs to Carey Park near Bunbury, 200km south of Perth.

Three people have been charged over one wild party that left a 37-year-old policeman unconscious.

One of those, a 16-year-old girl, has been charged with assaulting a public officer in relation to the Balga incident and has been bailed to appear in Perth Children's Court next month.

Thirty-one police vehicles, the dog squad and mounted police were called to the party in Balga, in Perth's north, about 10.20pm on Saturday after a report that about 120 young people were fighting and throwing bottles in the street.

Police yesterday conceded their resources had been stretched last night. But Inspector Chris Cassidy said there were “adequate powers” in place to deal with the ongoing problem.

Insp Cassidy rejected claims that police were fighting a losing battle on out of control parties, saying people needed to start taking more responsibility for their own actions.

“I don’t see it as a battle, I think it's just about community behaviour,” he said. “Individuals need to take responsibility for their own behaviour rather than relying on police to come and break up the fights and the melees that ensure.”

Insp Cassidy said it was “extremely frustrating” officers were continually being diverted from other duties to attend out of control parties.

“They (the officers) are attending to something that really shouldn’t be occurring,” he said.

Insp Cassidy said people taking drugs or drinking too much at house parties could not be controlled by police initially, but that they would continue to respond to such behaviour when it got out of hand.

“Our resources were stretched last night, however I think the fact is that policing is a dangerous business and unfortunately its going to continue,” he said.

“It’s a standard message of responsible consumption of alcohol, it's just the irresponsible consumption of liquor that is clearly the issue in most of these incidents.”

WA Police Union president Russell Armstrong said he was disgusted by last night’s events, describing those who took part as “drunken hooligans”.

“They have no respect for the police or the community and we are sick of it,” Mr Armstrong said today.

“Drunken hooligans, there are no other words for them, they know what they are doing and they should be made to clean up the streets and the property (they are damaging) because they are terrorising the community.”

A police spokeswoman said inquiries were continuing into the assault on the 37-year-old police officer and that no charges had yet been laid.

In 2009, harsh new laws were introduced that imposed jail terms of three to 12 months for offenders aged 16 or more who are convicted of assaulting a public officer.

However, as revealed in The Sunday Times in December, only one third of offenders charged with attacking public officers have been jailed since the laws were introduced. Of the 34 people charged with attacking public officers, 12 were jailed. Seven charges were dismissed and two were withdrawn.

Mr Armstrong said the new legislation was "fantastic", but was not being used in the courts effectively.

“We are sick and tired of these weak penalties that are being handed down,” he said. “Until they (the courts) start getting tough and using the powers that they have we will continue to have these situations every weekend."