Washington statute
RCW 46.61.502 — Driving under the influence
Current through 2026 Regular Session
Part of Chapter 46.61: Rules Of The Road, Revised Code of Washington.
Criminal charges under this statute
Full text of RCW 46.61.502
Statutory text current through the 2026 Regular Session. This publication reproduces the official text of the Revised Code of Washington from the Code Reviser's published files; it is not the official statutes of the State of Washington.
(1) A person is guilty of driving while under the influence of intoxicating liquor, cannabis, or any drug if the person drives a vehicle within this state:
(a) And the person has, within two hours after driving, an alcohol concentration of 0.08 or higher as shown by analysis of the person's breath or blood made under RCW 46.61.506; or
(b) The person has, within two hours after driving, a THC concentration of 5.00 or higher as shown by analysis of the person's blood made under RCW 46.61.506; or
(c) While the person is under the influence of or affected by intoxicating liquor, cannabis, or any drug; or
(d) While the person is under the combined influence of or affected by intoxicating liquor, cannabis, and any drug.
(2) The fact that a person charged with a violation of this section is or has been entitled to use a drug under the laws of this state shall not constitute a defense against a charge of violating this section.
(3)(a) It is an affirmative defense to a violation of subsection (1)(a) of this section, which the defendant must prove by a preponderance of the evidence, that the defendant consumed a sufficient quantity of alcohol after the time of driving and before the administration of an analysis of the person's breath or blood to cause the defendant's alcohol concentration to be 0.08 or more within two hours after driving. The court shall not admit evidence of this defense unless the defendant notifies the prosecution prior to the omnibus or pretrial hearing in the case of the defendant's intent to assert the affirmative defense.
(b) It is an affirmative defense to a violation of subsection (1)(b) of this section, which the defendant must prove by a preponderance of the evidence, that the defendant consumed a sufficient quantity of cannabis after the time of driving and before the administration of an analysis of the person's blood to cause the defendant's THC concentration to be 5.00 or more within two hours after driving. The court shall not admit evidence of this defense unless the defendant notifies the prosecution prior to the omnibus or pretrial hearing in the case of the defendant's intent to assert the affirmative defense.
(4)(a) Analyses of blood or breath samples obtained more than two hours after the alleged driving may be used as evidence that within two hours of the alleged driving, a person had an alcohol concentration of 0.08 or more in violation of subsection (1)(a) of this section, and in any case in which the analysis shows an alcohol concentration above 0.00 may be used as evidence that a person was under the influence of or affected by intoxicating liquor or any drug in violation of subsection (1)(c) or (d) of this section.
(b) Analyses of blood samples obtained more than two hours after the alleged driving may be used as evidence that within two hours of the alleged driving, a person had a THC concentration of 5.00 or more in violation of subsection (1)(b) of this section, and in any case in which the analysis shows a THC concentration above 0.00 may be used as evidence that a person was under the influence of or affected by cannabis in violation of subsection (1)(c) or (d) of this section.
(5) Except as provided in subsection (6) of this section, a violation of this section is a gross misdemeanor.
(6) It is a class B felony punishable under chapter 9.94A RCW, or chapter 13.40 RCW if the person is a juvenile, if:
(a) The person has three or more prior offenses within 15 years as defined in RCW 46.61.5055; or
(b) The person has ever previously been convicted of:
(i) Vehicular homicide while under the influence of intoxicating liquor or any drug, RCW 46.61.520(1)(a);
(ii) Vehicular assault while under the influence of intoxicating liquor or any drug, RCW 46.61.522(1)(b);
(iii) An out-of-state offense comparable to the offense specified in (b)(i) or (ii) of this subsection; or
(iv) A violation of this subsection (6) or RCW 46.61.504(6).
Official sources
Legal terms used in this section
Questions this section answers
Is driving under the influence a felony or a misdemeanor in Washington?
Driving under the influence is a Gross Misdemeanor in Washington under RCW 46.61.502.
Driving under the influence - standard: Gross Misdemeanor (RCW 46.61.502(5))
Which Washington statute covers driving under the influence?
Driving under the influence is governed by RCW 46.61.502 (Driving under the influence).
This reference is informational and is not legal advice.