Undercover observers used a digital tracking application to monitor which passersby took a drink without paying.
In the District, four stands were set up between Aug. 12 and 19 at the Dupont Farmers Market, Nationals Park, K Street NW and Capitol Hill.
According to Honest Tea, 95 percent of Washingtonians paid for their drinks that day. Las Vegas also scored 95 percent on the so-called National Honesty Index.
Nationwide, 93 percent of Americans left $1 per drink. Oakland, Calif., and Salt Lake City, Utah, tied for first place with 100 percent compliancy, while only 79 percent of Los Angelenos ponied up.
When the experiment was first conducted in 2010, the District received a honesty rating of 93 percent, enough to score second-place among the “participating” cities.
Now, as the pool of cities has grown, an improved honesty rating of 95 percent is just enough to keep the nation’s capital in the top 10.
“Though our experiment might not pass muster with a social scientist, the results present fascinating and fun insights about the American population,” Honest Tea president Seth Goldman said.
In that spirit of “fun,” Honest Tea also found that:
— Men on Capitol Hill were 94 percent honest.
— Women on Capitol Hill were 93 percent honest.
— People who were dressed in suits were 95 percent honest.
— Bald men in D.C. were 75 percent honest.
— Guys with beards in D.C. were 94 percent honest.
— In Capitol Hill, a mailman opted not to pay.
— At Dupont Farmer’s Market, someone paid with a $1 wooden coin.
— People on K St. were less honest (91 percent) than people on Capitol Hill (93 percent)
— The suburbs of D.C. were 94 percent honest.