services generally involve analysis of sample on its toxicity level. The waste water coming from the industries needs to be treated before being discharged in to water bodies. The type of treatment depends upon the type and level of contaminants present in the waste water. Following are parameters on which waste water is tested before deciding upon the type of treatment:
✓ Conductivity
✓ Mercury content
✓ Acidity
✓ Total dissolved solids
✓ Settle-able solids
✓ Hazardous chemicals
It is mandatory to treat the wastewater before discharging it into any kind of water body. The method of treating the water depends upon its toxicity level and type of contaminants dissolved in it. For all these reasons, industrial clients perform testing on wastewater.



Chlorine Residual


Ammoniacal Nitrogen as NH3.N

Total Dissolved Solids (Inorganic)

Total Kjeldahl Nitrogen

pH Value

Free Ammonia as NH3

Conductivity (µmhos/cm)

BOD@ 20°C for 5days and BOD@27°C for 3days

Turbidity as NTU

COD (Open reflux method)


Dissolved Oxygen

Acidity as CaCO3, mg/l

Hexavalent Chromium as Cr6+

Total Alkalinity as CaCO3

Boron as B

Phenolphthalein Alkalinity as CaCO3 or Carbonate Alkalinity as CO3

Percent Sodium

Methyl orange Alkalinity as CaCO3 or Bicarbonate Alkalinity as HCO3

Residual Sodium Carbonate

Total Hardness as CaCO3

Sodium absorption ratio

Calcium Hardness as CaCO3

Cyanide as CN

Magnesium Hardness as CaCO3

Chloride as Cl

Calcium as Ca

Fluoride as F

Magnesium as Mg

Total Phosphorus as P

Carbonate Hardness as CaCO3

Dissolved Phosphorus as P

Non –Carbonate Hardness as CaCO3

Sulphate as SO4

Total Solids

 Particle size of suspended solids

Fixed Solids, mg/l

Mixed Liquid suspended solids (MLSS)

Volatile Solids, mg/l

Mixed Liquid volatile suspended solids (MLVSS)

Total Suspended Solids

Mixed Liquid Fixed Suspended Solids (MLFSS), mg/l

Oil & Grease

Sludge Volume Index (SVI)





Phenolic Compound

Total Silica


Reactive Silica


Unreactive Silica