Another 23 were ejected, mostly for intoxication, while 28 were refused entry, police said.
A spate of deaths at Australian music festivals has led to a debate over whether pill testing should be allowed to check for impurities.
There have been concerns a "dirty" batch of MDMA capsules is behind some of the fatalities.
Premier Gladys Berejiklian has said she'd consider implementing pill testing in NSW if her government was shown evidence it saved lives.
The Liberal leader — who's been vehemently opposed to pill testing — appeared to soften her stance early in January when asked about another death at an Australian music festival.
"If there was a way in which we could ensure that lives were saved through pill testing we would consider it — but there is no evidence provided to the government on that," Ms Berejiklian told reporters at the time.
The premier convened an expert panel into festival safety in September 2018 after two people died at the Defqon. 1 event in western Sydney.
The panel was banned from examining pill testing but the premier earlier in the month claimed the government gave experts "free rein" when considering how to reduce harm.
"We don't stop anybody looking at all the options and we always say to them 'You have free rein to give the government advice on the best way forward'," Ms Berejiklian said.
The government is implementing all the expert panel's recommendations including introducing harsher penalties for festival drug dealers.
Ms Berejiklian insisted pill testing gave drug users "a false sense of security".
"I hear what some people are saying but as a premier, as the leader of NSW, my job is to keep the community safe," she said.
