Study topic
Blood alcohol limits in Ontario
Ontario takes a strict approach to alcohol and driving. The limit that applies to you depends on your licence class and age, and the penalties escalate quickly.
Key facts to remember
- ◆ G1, G2, and all drivers aged 21 and under must have a zero blood alcohol concentration.
- ◆ A BAC of 0.05 to 0.08 ("warn range") brings an immediate roadside licence suspension.
- ◆ A BAC of 0.08 or over is a criminal offence under the Criminal Code.
- ◆ Drugs, including cannabis, are treated like alcohol -- novice and young drivers must have zero in their system.
- ◆ Refusing a breath or drug test carries the same penalties as failing it.