More than 460 drivers were caught over the drink drive limit during the All Wales Christmas Anti Drink and Drug Driving Campaign.
Throughout the month-long campaign 35,255 drivers throughout Wales were breath tested, and in Dyfed-Powys a total of 11,281 breath tests were carried out, with 161 being positive.
The campaign was launched with support from the family of Kieran Lea Arnold, who was tragically killed following a road traffic collision by a drink driver who was twice the legal limit last June.
Deputy Chief Constable Gareth Pritchard said: “Although warnings were issued throughout the campaign 465 drivers throughout Wales chose to ignore those warnings by risking their own lives and the lives of others by breaking the law. This is very disappointing.
“It is also astonishing to see that some were almost four times the legal limit. It is clear that these individuals showed a complete disregard for the safety of other road users as well as their own.
“Driving with excess alcohol or under the influence of drugs is not just a criminal offence but also completely unacceptable.
He added: “However, drink driving is not just about Christmas. It ruins lives all year round. Perpetual drink drivers will choose to drink and drive any day of the year so we need support from the public 365 days a year to help us take these people off the roads of Wales.”
Anyone with information relating to someone driving while under the influence of alcohol or drugs, is asked to contact Dyfed-Powys Police on 101.