Though it's been introduced and rejected in the Colorado state Senate four times in the past three years, the pot DUI bill made a comeback Wednesday.

It was rejected in a Senate committee as recently as Monday due to the bill's recurring controversy over how much THC is too much. But lawmakers worked into Tuesday night to make changes to the bill after lobbyists from the Colorado Association of Chiefs of Police voiced concerns.

"If we're going to allow marijuana to be legalized, we must have some standard," the bill's sponsor, Democratic Denver Rep. Dan Pabon said.

In February, the state's 24-member marijuana task force endorsed the bill meant to mirror the drunk driving limit of .08 blood alcohol content except for one significant exception: drivers would be able to argue in court that they are not impaired at the 5 nanogram limit.

Four previous attempts to set a marijuana blood limit for drivers failed in the state Senate and one of the bills' most contested aspects has been the actual limit itself. Opponents have argued that a person's size, tolerance and other factors have an effect on whether or not 5 nanograms of THC would cause driving impairment. Frequent users, like medical marijuana card holders, can surpass that limit even if they haven't been smoking recently.

"I haven't had a car accident since I was 18, and I've had marijuana in my system for most of that time," said marijuana activist Paul Saurini, 39, in a report by The Washington Post.

Meanwhile in Washington, the other state that voted to legalize marijuana, some have argued that the 5 nanogram limit is still too low for a DUI standard.


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  • $13.7 Billion Saved On Prohibition Enforcement Costs

    The government would save an estimated $13.7 billion on prohibition enforcement costs and tax revenue by legalizing marijuana, <a href="http://www.huffingtonpost.com/2012/04/17/economists-marijuana-legalization_n_1431840.html" target="_hplink">according to a paper endorsed by 300 economists</a>.

  • Marijuana Inmates Cost Prisons $1 Billion A Year

    Inmates incarcerated on marijuana-related charges cost U.S. prisons $1 billion annually, according to a 2007 study, <a href="http://www.alternet.org/rights/47815/" target="_hplink">AlterNet reports</a>.

  • Marijuana Prohibition Costs Taxpayers $41.8 Billion A Year

    Including lost tax revenues, a 2007 study found that enforcing the marijuana prohibition costs tax payers $41.8 billion annually, <a href="http://www.forbes.com/2007/09/29/marijuana-laws-work-biz-cx_qh_1001pot.html" target="_hplink">Forbes</a> reports.

  • California Marijuana Crop Worth $14 Billion A Year

    Marijuana growers account for <a href="http://www.time.com/time/nation/article/0,8599,1884956,00.html" target="_hplink">$14 billion a year in sales in California</a>, making it the state's most valuable cash crop, TIME reports.

  • Illegal Marijuana A $36 Billion A Year Industry

    It's estimated that <a href="http://madamenoire.com/106691/capitalizing-on-the-billion-dollar-marijuana-industry/" target="_hplink">illegal marijuana is a $36 billion industry</a> in the U.S., MadameNoire reports.

  • One-Third Of Americans Think Legalization Would Boost The Economy

    About one-third of Americans say they think <a href="http://www.huffingtonpost.com/2010/04/20/legalizing-pot-will-not-b_n_544526.html?" target="_hplink">legalizing marijuana would boost the economy</a>, according to a 2010 poll by Associated Press-CNBC.

  • Dispensary Ads Boost Newspapers' Revenue

    The <em>Sacramento News and Review</em> saw a big boost in ad revenue when it offered advertising space for more than 60 medical marijuana dispensaries, enabling the publication to hire three additional employees, <a href="http://www.news10.net/news/local/article/144285/2/Marijuana-ads-mean-big-money-for-weekly-newspaper" target="_hplink">according to News 10</a>.

  • Mendocino Zip Tie Program Raised $600,000

    Mendocino County, California's zip tie program aimed at regulating medical marijuana growing by charging permits for each plant raised <a href="http://www.huffingtonpost.com/2012/01/09/medical-marijuana-license-mendocino_n_1193198.html" target="_hplink">$600,000 in revenue in for the Sheriff's department</a> in 2011.

  • Oakland Raised More Than $1 Million In Marijuana Tax Revenue

    The city of Oakland, California raised $1.3 million in tax revenue from medical marijuana dispensaries in 2011, 3 percent of the city's total business tax revenue, according to <a href="http://www.nytimes.com/2012/02/12/us/cities-turn-to-a-crop-for-cash-medical-marijuana.html?_r=1" target="_hplink"><em>The New York Times</em></a>.

  • Colorado Pulls In $5 Million From Pot Sales Tax

    In 2011, Colorado pulled in $5 milllion in sales taxes from medical marijuana businesses, <a href="http://www.nytimes.com/2012/02/12/us/cities-turn-to-a-crop-for-cash-medical-marijuana.html?_r=1" target="_hplink"><em>The New York Times</em></a> reports.

  • Legal Marijuana Could Be $100 Billion Industry

    Economist Stephen Easton estimated in 2010 that <a href="http://www.businessweek.com/debateroom/archives/2010/03/legalize_mariju.html" target="_hplink">legal marijuana could be a $45 to $100 billion industry</a>, <em>Bloomberg Businessweek</em> reports.

  • Each weGrow Center Creates 75 Jobs

    When hydroponic marijuana growing supply chain weGrow opens a new store it <a href="http://aznow.biz/small-biz/wegrow-phoenix-opens-cultivates-opportunities-arizona)" target="_hplink">creates an estimated 75 jobs</a> indirectly, according to AZBusiness Magazine.

  • Majority Of States Support Taxing Marijuana

    More than <a href="http://www.huffingtonpost.com/2010/04/20/legalizing-pot-will-not-b_n_544526.html?" target="_hplink">60 percent of states agree with taxing marijuana</a>, according to a poll by Associated Press-CNBC.

  • Marijuana Affects Workplace Motivation

    A Norwegian study 25 years in the making came to the shocking conclusion that <a href="http://www.huffingtonpost.com/2012/02/24/marijuana-use-has-adverse-affect-workplace-motivation_n_1300278.html?" target="_hplink">frequent marijuana use lowers employees' motivation at work</a>.

  • More Than 1,000 Dispensaries In California

    There could be more than 1,000 medical marijuana dispensaries operating in California, <a href="http://www.pasadenaweekly.com/cms/story/detail/how_does_your_pot_grow/8070/" target="_hplink"><em>Pasadena Weekly</em></a> reported in 2009.

  • Denver Counts More Dispensaries Than Starbucks

    As of July 2011, the city of Denver <a href="http://www.huffingtonpost.com/2011/07/06/medical-marijuana-denver-starbucks_n_891796.html" target="_hplink">counted more medical marijuana dispensaries than Starbucks franchises</a>.