The health ministry plans to send 34 surveyors out to 8,000 homes to find out how tobacco is used there.
The $245,000 project will last 14 weeks. The survey firm, Iniciativas de Desarrollo Empresarial S.A., is testing the questionnaire today and tomorrow in the canton of Mora and in Hatillo.
Health officials said that the survey would be a benchmark for the country.
A.M. Costa Rica incorrectly reported Wednesday that the survey already had been done.
The ministry said that the survey results will help officials assign resources to needed areas.
Among other questions, the surveyors will seek information on exposure to secondhand smoke.