(Published by the national environment Board, vol. 8 (2537) based in the Act to promote and preserve the quality of the environment, the national water quality standards since 2535 matter in surface water sources).
(National Environmental Commission No. 8 (BE 2537) issued under the Environmental Quality Act 2535 National Standard for water quality in surface water).
(notice board national environmental issue 8 (the 2537) issued by the specialized in the enhancement and improvement of the environment, National The 2535 about water quality standard of surface water source).