Which specify the dissolved oxygen (DO) not less than 4.0 mg / L, the BOD (BOD) of no more than 2.0 mg / liter. The coliform bacteria (TCB), no more than 20 000 MPN / 100 ml bacteria faecal coliforms (FCB), no more than 4000 MPN / 100 ml
.
การแปล กรุณารอสักครู่..
