INVESTIGATION OF DRINKING WATER SUPPLIES 169 



proper application of methods, the interpretation of results, 

 and by those who are competent to make definite recommenda- 

 tions for correcting defects or for the abandonment of a water 

 supply. The use of haphazard methods leads to erroneous 

 opinions or false security which may result in loss of life 

 among the consumers. 



