there are international standards regarding drinking water. write any3 among them
Answers
6.2 Toxic chemical substances . . . . . . . . . . . . 31
6.3 Pesticides . . . . . . . . . . . . . . . . . . . 34
6.4 Specific chemical substances that may affect health . 35
6.4.1 Fluorides. . . . . . . . . . . . . 35
6.4.2 Nitrates . . . • . . . . . . . . . . . . . 36
6.4.3 Polynuclear aromatic hydrocarbons . . . . . 37
6.5 Substances and characteristics affecting the acceptability of
water . . . . . . . . . . . . . . . . . . . . . . . . 37
6.6 General examination for physical, chemical and aesthetic
characteristics of water 37
7. SAMPUNG • • • • • • • • 45
7.1 Sampling for bacteriological examination 45
7.1.1 Frequency of sampling. . . . . . 45
7. 1.2 Collection, transport and storage of samples for
bacteriological examination. . 48
7.2 Sampling for virological examination . . . . . . . . SO
7.2.1 Frequency of sampling. . . . . . . . . . . . SO
7.2.2 Collection, transport and storage of samples for
virological examination . . . . . . . . . . . SO
7.3 Sampling for biological examination. . . . . . . . . SO
7.3.1 Collection, transport and storage of samples for
biological examination . . . . . . . . . . . SO
7.4 Sampling for radiological examination. . . . . . . . 51
7.4.1 Collection of samples for radiological examination. 51
7.5 Sampling for physical and chemical examination . . . 51
7.5.1 Frequency of sampling. . . . . . . . . . . . 51
7.5.2 Collection, transport and storage of samples for
physical and chemical examination . . . . . . 52
ANNEX 1. Examples of forms for reporting the results of bacterio-
logical and chemical examination of water . . . . . . . 53
ANNEX 2. Tables for determining the most probable number (MPN)
of particular organisms present in 100 ml of water . . . 57
ANNEX 3. Membership of the WHO Expert Committee on Health
Criteria for Water Supplies 63
REFERENCES • 64
INDEX • • • 69
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