Sediment testing results
The quality of sediment in the surface water sources of the Kok River in Mae Ai District, Chiang Mai Province and Mueang District, Chiang Rai Province, where samples were collected at 6 locations, found arsenic (As) values exceeding the standard at all 6 locations, unsafe for benthic animals, more than or equal to 33 milligrams per kilogram of dry weight. สล็อตเว็บตรง