Alcohol Drug Limits

The legal BAC limit for adult drivers in New Hampshire is

Drivers aged 21 and older are legally intoxicated at 0.08% BAC or higher, leading to DWI charges.

The maximum BAC allowed for drivers under 21 is

New Hampshire enforces a 0.02% BAC limit for drivers under 21 under its zero-tolerance law.

Commercial drivers in NH are considered impaired at BAC levels of

CDL holders may not operate commercial vehicles with a BAC of 0.04% or higher under federal and state law.

Refusing a chemical test under the Implied Consent Law results in

Refusing to take a breath, blood, or urine test results in license suspension, even without a DWI conviction.

A first DWI offense may lead to license suspension for a minimum of

First-time DWI offenders face at least 9 months of license suspension, plus possible fines or treatment.

A BAC of 0.15% or higher in NH qualifies as

A BAC at or above 0.15% may result in an Aggravated DWI, with harsher penalties and possible jail.

Prescription drug use can result in DWI charges if

Even legal medications may lead to DWI if they impair your driving ability or reaction time.

The law considers marijuana use while driving to be

New Hampshire treats driving under the influence of marijuana the same as alcohol-related DWI.

Underage drivers caught with alcohol in their system face

Those under 21 with 0.02% BAC or higher may lose their license under NH’s strict underage DWI laws.

A driver convicted of DWI must complete this before license restoration

Offenders must attend a state-approved alcohol/drug education or treatment program before reinstatement.

Drivers with a second DWI conviction may lose their license for

A second DWI within 10 years can result in up to 3 years of license suspension and mandatory jail.

Drivers with an Ignition Interlock Device must use it for

After an Aggravated or repeat DWI, drivers are required to install an Ignition Interlock Device before regaining full driving privileges.

An open alcohol container in the vehicle leads to

NH prohibits open containers in the passenger area and violators face fines and license points.

A BAC reading of 0.03% while on probation for DWI is considered

Probationary drivers must stay completely sober; any alcohol may violate their probation terms.

Refusing a second BAC test after prior offenses may result in

A second refusal can lead to 2 years of license suspension under enhanced Implied Consent penalties.