Devon and Cornwall police have released the results of their latest campaign.
Police officers administered a total of 788 breath tests of which 163 were positive, refused or failed to provide, equating to 20%.
Last year the comparable figures were 776 breath tests with 132 positive, refused or failed to provide which equates to 17%.
Police say anyone convicted of drink driving can expect to be banned for at least 12 months, and receive a fine of up to £5,000 - they could also face six months in prison.
Delivery driver sacked after dumping Devon parcels
Massive turnout for 'collapsed road' meeting
Radio Exe listening reaches highest level ever
Seventh weather warning hits Devon
Police probe Airbnb owners after Co-Op heist
Second swimmer named after Budleigh Christmas swim
