1. Biological Oxygen Demand (BOD) The amount of oxygen in the water, the creatures must be used in processes
2. Chemical Oxygen Demand (COD) to measure the dirtiness of the water
3. Dissolved Oxygen (DO) to determine the amount of oxygen dissolved in the water
4. Total Dissolved Solids (TDS) for the sum of dissolved solids in water
5. Suspended Solids (SS) analysis suspensions
6. The pH value of the acid - base.
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