• Drivers under the age of 21 operating a motor vehicle with BAC of 0.02 or higher;
• Drivers 21 or older operating a motor vehicle with BAC of 0.08 or higher;
• Drivers with commercial driver license operating a vehicle with BAC of 0.08 or higher; and
• Drivers operating a vehicle while under the influence of intoxicating liquor or any other drugs, or both alcohol and drugs.

Penalties for DUI convictions in Connecticut include, but are not limited to, the following:

First DUI Conviction

• For a first DUI conviction in Connecticut, drivers may be sentenced to jail for 48 hours to 6 months and may be fined from $500 to $1000.  In addition, drivers will face suspension of their driver license for up to a year and will be required to complete a substance treatment program that costs extra money.  Drivers may also be required to complete up to 100 hours of community service in lieu of jail time.  Finally, the vehicle of those arrested for DUI will be impounded for 48 hours and the drivers will be required to pay fees in order to obtain possession of their vehicle.

Second DUI Conviction

• For a second DUI conviction in Connecticut, drivers may be sentenced to jail for 120 days minimum to 2 years and may be fined from $1000 to $4000.  In addition, drivers will face suspension of their driver license for up to a year and will be required to complete a substance treatment program that costs extra money.  Drivers may also be required to complete up to 100 hours of community service in lieu of jail time.  Drivers will also be required to install an Ignition Interlock Device for 2 years after reinstatement of the driver license.  Finally, the vehicle of those arrested for DUI will be impounded for 48 hours and the drivers will be required to pay fees in order to obtain possession of their vehicle.

Third DUI Conviction

• For a third DUI conviction in Connecticut, drivers may be sentenced to jail for 1 year minimum and up to 3 years and may be fined from $2000 to $8000.  In addition, those convicted of a third DUI will face permanent suspension of their drivers license; however, drivers may request a hearing on reinstatement of the drivers license after 6 years.  Drivers may also be required to complete up to 100 hours of community service.

Implied Consent Laws of Connecticut

Under the implied consent law of Connecticut, drivers holding a drivers license issued by the State agree to submit to a chemical test of their blood, breath or urine and a refusal to submit to such testing subjects the drivers to penalties similar to those for a DUI conviction.

DUI Statute:

§ 14-227a

General Statutes
TITLE 14 Motor Vehicles. Use of the Highway by Vehicles. Gasoline
Chapter 248 Vehicle Highway Use

14-227a. Operation while under the influence of liquor or drug or while having an elevated blood alcohol content

1. Operation while under the influence or while having an elevated blood alcohol content. No person shall operate a motor vehicle while under the influence of intoxicating liquor or any drug or both. A person commits the offense of operating a motor vehicle while under the influence of intoxicating liquor or any drug or both if such person operates a motor vehicle
   1. while under the influence of intoxicating liquor or any drug or both, or
   2. while such person has an elevated blood alcohol content. For the purposes of this section, “elevated blood alcohol content” means a ratio of alcohol in the blood of such person that is eight-hundredths of one per cent or more of alcohol, by weight, and “motor vehicle” includes a snowmobile and all-terrain vehicle, as those terms are defined in section 14-379.
2. Admissibility of chemical analysis. Except as provided in subsection (c) of this section, in any criminal prosecution for violation of subsection (a) of this section, evidence respecting the amount of alcohol or drug in the defendant's blood or urine at the time of the alleged offense, as shown by a chemical analysis of the defendant's breath, blood or urine shall be admissible and competent provided:
   1. The defendant was afforded a reasonable opportunity to telephone an attorney prior to the performance of the test and consented to the taking of the test upon which such analysis is made;
   2. a true copy of the report of the test result was mailed to or personally delivered to the defendant within twenty-four hours or by the end of the next regular business day, after such result was known, whichever is later;
   3. the test was performed by or at the direction of a police officer according to methods and with equipment approved by the Department of Public Safety and was performed in accordance with the regulations adopted under subsection (d) of this section;
   4. the device used for such test was checked for accuracy in accordance with the regulations adopted under subsection (d) of this section;
   5. an additional chemical test of the same type was performed at least thirty minutes after the initial test was performed or, if requested by the police officer for reasonable cause, an additional chemical test of a different type was performed to detect the presence of a drug or drugs other than or in addition to alcohol, provided the results of the initial test shall not be inadmissible under this subsection if reasonable efforts were made to have such additional test performed in accordance with the conditions set forth in this subsection and such additional test was not performed or was not performed within a reasonable time, or the results of such additional test are not admissible for failure to meet a condition set forth in this subsection; and
   6. evidence is presented that the test was commenced within two hours of operation. In any prosecution under this section it shall be a rebuttable presumption that the results of such chemical analysis establish the ratio of alcohol in the blood of the defendant at the time of the alleged offense, except that if the results of the additional test indicate that the ratio of alcohol in the blood of such defendant is twelve-hundredths of one per cent or less of alcohol, by weight, and is higher than the results of the first test, evidence shall be presented that demonstrates that the test results and the analysis thereof accurately indicate the blood alcohol content at the time of the alleged offense.
3. Evidence of blood alcohol content. In any prosecution for a violation of subdivision (1) of subsection (a) of this section, reliable evidence respecting the amount of alcohol in the defendant's blood or urine at the time of the alleged offense, as shown by a chemical analysis of the defendant's blood, breath or urine, otherwise admissible under subsection (b) of this section, shall be admissible only at the request of the defendant.
4. Testing and analysis of blood, breath and urine. The Commissioner of Public Safety shall ascertain the reliability of each method and type of device offered for chemical testing and analysis purposes of blood, of breath and of urine and certify those methods and types which said commissioner finds suitable for use in testing and analysis of blood, breath and urine, respectively, in this state. The Commissioner of Public Safety shall adopt regulations, in accordance with chapter 54, [FN1] governing the conduct of chemical tests, the operation and use of chemical test devices, the training and certification of operators of such devices and the drawing or obtaining of blood, breath or urine samples as said commissioner finds necessary to protect the health and safety of persons who submit to chemical tests and to insure reasonable accuracy in testing results. Such regulations shall not require recertification of a police officer solely because such officer terminates such officer's employment with the law enforcement agency for which certification was originally issued and commences employment with another such agency.
5. Evidence of refusal to submit to test. In any criminal prosecution for a violation of subsection (a) of this section, evidence that the defendant refused to submit to a blood, breath or urine test requested in accordance with section 14-227b shall be admissible provided the requirements of subsection (b) of said section have been satisfied. If a case involving a violation of subsection (a) of this section is tried to a jury, the court shall instruct the jury as to any inference that may or may not be drawn from the defendant's refusal to submit to a blood, breath or urine test.
6. Reduction, nolle or dismissal prohibited. If a person is charged with a violation of the provisions of subsection (a) of this section, the charge may not be reduced, nolled or dismissed unless the prosecuting authority states in open court such prosecutor's reasons for the reduction, nolle or dismissal.
7. Penalties for operation while under the influence. Any person who violates any provision of subsection (a) of this section shall:
   1. For conviction of a first violation,
      1. be fined not less than five hundred dollars or more than one thousand dollars, and
      2. be
         1. imprisoned not more than six months, forty-eight consecutive hours of which may not be suspended or reduced in any manner, or
         2. imprisoned not more than six months, with the execution of such sentence of imprisonment suspended entirely and a period of probation imposed requiring as a condition of such probation that such person perform one hundred hours of community service, as defined in section 14-227e, and
      3. have such person's motor vehicle operator's license or nonresident operating privilege suspended for one year;
   2. for conviction of a second violation within ten years after a prior conviction for the same offense,
      1. be fined not less than one thousand dollars or more than four thousand dollars,
      2. be imprisoned not more than two years, one hundred twenty consecutive days of which may not be suspended or reduced in any manner, and sentenced to a period of probation requiring as a condition of such probation that such person perform one hundred hours of community service, as defined in section 14-227e, and
      3. 
         
         1. have such person's motor vehicle operator's license or nonresident operating privilege suspended for three years or until the date of such person's twenty-first birthday, whichever is longer, or
         2. if such person has been convicted of a violation of subdivision (1) of subsection (a) of this section on account of being under the influence of intoxicating liquor or of subdivision (2) of subsection (a) of this section, have such person's motor vehicle operator's license or nonresident operating privilege suspended for one year and be prohibited for the two-year period following completion of such period of suspension from operating a motor vehicle unless such motor vehicle is equipped with a functioning, approved ignition interlock device, as defined in section 14-227j; and
   3. for conviction of a third and subsequent violation within ten years after a prior conviction for the same offense,
      1. be fined not less than two thousand dollars or more than eight thousand dollars,
      2. be imprisoned not more than three years, one year of which may not be suspended or reduced in any manner, and sentenced to a period of probation requiring as a condition of such probation that such person perform one hundred hours of community service, as defined in section 14-227e, and
      3. have such person's motor vehicle operator's license or nonresident operating privilege permanently revoked upon such third offense. For purposes of the imposition of penalties for a second or third and subsequent offense pursuant to this subsection, a conviction under the provisions of subsection (a) of this section in effect on October 1, 1981, or as amended thereafter, a conviction under the provisions of either subdivision (1) or (2) of subsection (a) of this section, a conviction under the provisions of section 53a-56b or 53a-60d or a conviction in any other state of any offense the essential elements of which are determined by the court to be substantially the same as subdivision (1) or (2) of subsection (a) of this section or section 53a-56b or 53a-60d, shall constitute a prior conviction for the same offense.
8. Suspension of operator's license or nonresident operating privilege.
   1. Each court shall report each conviction under subsection (a) of this section to the Commissioner of Motor Vehicles, in accordance with the provisions of section 14-141. The commissioner shall suspend the motor vehicle operator's license or nonresident operating privilege of the person reported as convicted for the period of time required by subsection (g) of this section. The commissioner shall determine the period of time required by said subsection (g) based on the number of convictions such person has had within the specified time period according to such person's driving history record, notwithstanding the sentence imposed by the court for such conviction.
   2. The motor vehicle operator's license or nonresident operating privilege of a person found guilty under subsection (a) of this section who is under eighteen years of age shall be suspended by the commissioner for the period of time set forth in subsection (g) of this section, or until such person attains the age of eighteen years, whichever period is longer.
   3. The motor vehicle operator's license or nonresident operating privilege of a person found guilty under subsection (a) of this section who, at the time of the offense, was operating a motor vehicle in accordance with a special operator's permit issued pursuant to section 14-37a shall be suspended by the commissioner for twice the period of time set forth in subsection (g) of this section.
   4. If an appeal of any conviction under subsection (a) of this section is taken, the suspension of the motor vehicle operator's license or nonresident operating privilege by the commissioner, in accordance with this subsection, shall be stayed during the pendency of such appeal.
9. Installation of ignition interlock device.
   1. The Commissioner of Motor Vehicles shall permit a person whose license has been suspended in accordance with the provisions of subparagraph (C)(ii) of subdivision (2) of subsection (g) of this section to operate a motor vehicle if (A) such person has served not less than one year of such suspension, and (B) such person has installed an approved ignition interlock device in each motor vehicle owned or to be operated by such person. No person whose license is suspended by the commissioner for any other reason shall be eligible to operate a motor vehicle equipped with an approved ignition interlock device.
   2. All costs of installing and maintaining an ignition interlock device shall be borne by the person required to install such device.
   3. The commissioner shall adopt regulations, in accordance with the provisions of chapter 54, to implement the provisions of this subsection. The regulations shall establish procedures for the approval of ignition interlock devices, for the proper calibration and maintenance of such devices and for the installation of such devices by any firm approved and authorized by the commissioner.
   4. The provisions of this subsection shall not be construed to authorize the continued operation of a motor vehicle equipped with an ignition interlock device by any person whose operator's license or nonresident operating privilege is withdrawn, suspended or revoked for any other reason.
   5. The provisions of this subsection shall apply to any person whose license has been suspended in accordance with the provisions of subparagraph (C)(ii) of subdivision (2) of subsection (g) of this section on or after September 1, 2003.
10. Participation in alcohol education and treatment program. In addition to any fine or sentence imposed pursuant to the provisions of subsection (g) of this section, the court may order such person to participate in an alcohol education and treatment program.
11. Seizure and admissibility of medical records of injured operator. Notwithstanding the provisions of subsection (b) of this section, evidence respecting the amount of alcohol or drug in the blood or urine of an operator of a motor vehicle involved in an accident who has suffered or allegedly suffered physical injury in such accident, which evidence is derived from a chemical analysis of a blood sample taken from or a urine sample provided by such person after such accident at the scene of the accident, while en route to a hospital or at a hospital, shall be competent evidence to establish probable cause for the arrest by warrant of such person for a violation of subsection (a) of this section and shall be admissible and competent in any subsequent prosecution thereof if:
    1. The blood sample was taken or the urine sample was provided for the diagnosis and treatment of such injury;
    2. if a blood sample was taken, the blood sample was taken in accordance with the regulations adopted under subsection (d) of this section;
    3. a police officer has demonstrated to the satisfaction of a judge of the Superior Court that such officer has reason to believe that such person was operating a motor vehicle while under the influence of intoxicating liquor or drug or both and that the chemical analysis of such blood or urine sample constitutes evidence of the commission of the offense of operating a motor vehicle while under the influence of intoxicating liquor or drug or both in violation of subsection (a) of this section; and
    4. such judge has issued a search warrant in accordance with section 54-33a authorizing the seizure of the chemical analysis of such blood or urine sample. Such search warrant may also authorize the seizure of the medical records prepared by the hospital in connection with the diagnosis or treatment of such injury.
12. Participation in victim impact panel program. If the court sentences a person convicted of a violation of subsection (a) of this section to a period of probation, the court may require as a condition of such probation that such person participate in a victim impact panel program approved by the Court Support Services Division of the Judicial Department. Such victim impact panel program shall provide a nonconfrontational forum for the victims of alcohol-related or drug-related offenses and offenders to share experiences on the impact of alcohol-related or drug-related incidents in their lives. Such victim impact panel program shall be conducted by a nonprofit organization that advocates on behalf of victims of accidents caused by persons who operated a motor vehicle while under the influence of intoxicating liquor or any drug, or both. Such organization may assess a participation fee of not more than twenty-five dollars on any person required by the court to participate in such program.