Proposed guideline values for Radioactivity in Drinking water is
Key guideline aspects of WHO recommended drinking water quality: –
Colour < 15 true colour units (TCU)
Turbidity < 5 nephlometric turbidity units (NTU)
pH: 6.5 – 8.5
Total dissolved solids (TDS) < 600 mg/litre
Zero pathogenic microorganisms
Zero infectious viruses
Absence of pathogenic protozoa and infective stages of helminthes
Fluorine < 1.5 ppm (0.5 – 0.8 ppm: Optimum level)
Nitrates < 50 mg/litre
Nitrites < 3 mg/litre
Gross alpha radiological activity < 0.5 Bq/litre (New Guideline — WhO)
Gross beta radiological activity < 1.0 Bq/litre (New Guideline — WhO).
Gross a activity 1.0 Bq/L and Gross b activity 10.0 Bq/L
Gross a activity 1.0 Bq/L and Gross b activity 0.1 Bq/L
Gross a activity 0.1 Bq/L and Gross b activity 1.0 Bq/L
Gross a activity 10 Bq/L and Gross b activity 1.0 Bq/L