The water quality indicators

COD/(mg∙L⁻¹)

Ammonia nitrogen/(mg∙L⁻¹)

Total nitrogen/(mg∙L⁻¹)

Oil/(mg∙L⁻¹)

pH/1

Temperature/˚C

Scope

189 - 397

14 - 39

28 - 50

8 - 10

6 - 8

21 - 30