Drugs, cash, a prohibited firearm and ammunition were allegedly discovered by police after a driver was stopped for a random breath test in Bligh Park.
The driver was stopped about 1.35am on Saturday, September 7, Hawkesbury police said in a statement.
"Police had cause to conduct a search of the driver, passenger and vehicle and as a result located drug utensils, a crystal like substance believed to be methamphetamine, green vegetable matter believed to be cannabis, a beige coloured powder believed to be amphetamine, a solid brown substance believed to be cannabis resin, a pen-style firearm, ammunition and cash," the statement said.
Both driver and passenger were arrested and taken to Windsor police station.
A 50-year-old Bowen Mountain woman has been charged with supplying a prohibited drug, four counts of possessing a prohibited drug, possessing equipment for administering prohibited drugs, and goods in custody.
The woman is due to appear before Windsor Local Court later this month.
A 33-year-old Bligh Park man has been charged with possessing an unauthorised prohibited firearm, and possessing ammunition without a licence.
The man was refused bail and he is due to appear before the same court later this month, police stated.