Prajon Prachsakul said government officials and volunteers were disinfecting tourist attractions and crowded places such as Chiang Rai Airport, shopping malls, Wat Huai Pla Kang, Wat Rong Khun, Singha Park and the Mae Sai Border Checkpoint.
The move comes after 34 Thai returnees from Myanmar tested positive for Covid-19 after sneaking back across the border into Mae Sai district.
The governor said the disinfection operation was conducted to restore confidence among people visiting Chiang Rai for winter season events such as flower festivals and New Year countdowns.
"It also aims to create awareness on how people can protect themselves against Covid-19, such as by wearing facemasks, washing hands and cleaning their houses regularly," he said.
This cooperation to contain the spread of disease would be the best New Year's gift for people in the province, he added.