The NRP stopped about 600 vehicles during R.I.D.E. programs in St. Catharines and Port Colborne.
Officers administered 26 roadside screening tests on Monday and four drivers found themselves in the warning range.
They each face a three-day licence suspension.
The officers also issued tickets for traffic related offences.
Bridges Community Health Pitches In
The Niagara health group is staying open more until September
Impaired Drivers' Names No Longer Released
The NRP say there's no evidence this has reduced this crime since 2014
Pelham Passes Tree Protection
The town says anyone can nominate a tree
Massage Therapist Charged With Assault
Police say the sexual assault happened during an appointment at a clinic in Fort Erie
Advertiser Hopes to Draw Canadians
Buffalo based advertiser wants to remind Canadians we are welcome to cross the bridge, expects to have billboard up for another month
NRPS Asked to Control Tow Truck List
Niagara tow truck companies say Niagara Towing Alliance is not running it fairly
UPDATE: Hockey Players Acquitted in Sexual Assault Trial
Ontario Superior Court Justice Maria Carroccia delivered her decision on Thursday.
Man Wanted in Charles Daley Park Death
Update: Police say it's 2nd degree murder