New Hampshire drivers give “implied consent” to a chemical test for alcohol in exchange for receiving a New Hampshire driver’s license. The chemical test is given if the driver is pulled over on suspicion of driving under the influence (DUI) or driving while intoxicated (DWI).
Usually, a preliminary breath test is the first chemical test offered. If the driver refuses a breath test, they must submit to a blood or urine test or risk an administrative license suspension, leaving them unable to drive in New Hampshire.
New Hampshire law provides specific rules for testing blood or urine, as well as specific rules for ensuring accurate equipment in measuring a person’s blood alcohol level. Some of these rules include: