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New Hampshire DWI Blood Test

While breathalyzer tests are the easiest method of determining a driver’s blood alcohol content (BAC) during a driving while intoxicated (DWI) investigation, blood tests are the most accurate. For this reason, some New Hampshire law enforcement agencies will request a blood test to determine your BAC. If you are facing drunk-driving charges after submitting to a New Hampshire DWI blood test, you should immediately contact an experienced DWI defense attorney to investigate your results.

Unlike a breath test, which may be administered by the police officer, you must be transported to a hospital for a DWI blood test. After a blood sample is taken, it will be delivered to the New Hampshire State Police Forensic Laboratory for gas chromatography analysis.

In New Hampshire, the legal limit for drivers over 21 is .08%; if your BAC results are over this limit, you will be charged with DWI. However, there are many errors that can occur with the blood test. For example, if the hospital and the lab fail to store the sample properly and do not document the chain of custody of the sample, your results may be thrown out and your case can be dismissed.

Using an expired blood testing kit could create an inaccurate DWI blood test result. Other errors, such as improperly preserving the sample or failing to add an anti-coagulant can also have an impact on your reading.

Being charged with drunk driving—especially if you tested over the legal BAC limit—can be an intimidating experience. However, you must keep in mind that blood testing is a complicated process and errors do occur.