The 7-year-old Payment Card Industry data-security standard (PCI) is proving its effectiveness in preventing data breaches among small merchants, according to a survey of payments-industry acquirers set to be released next week.

The survey, cosponsored by ControlScan Inc., an Alpharetta, Ga.-based vendor of PCI-compliance solutions, and the Merchant Acquirers’ Committee, a trade group, found that, among acquirers who said 10% or fewer of their small merchants comply with PCI, 100% said at least one of their merchants had sustained a breach in the preceding year.  At the other end of the spectrum, however, only 17% of those acquirers with a 61% or better compliance rate reported at least one merchant with a breach.