摘要：Good water quality is a basic need for human health and water is naturally or artificially overlying with different trace and heavy metals. These metals have an important physiological role with the body, but the bio-toxic effects of many metals are of great health concern. Therefore, contamination of water by heavy metals could be a major concern for human health and as well as for the ecosystem. The present study deals with the elemental screening of drinking water and to compare the seasonal variation of trace and heavy metals in natural source water and their corresponding tap supply from habitat sites of Champawat district, Uttarakhand, (India). The detection of trace and heavy metals were assessed in ppm according to official method by using an Atomic absorption spectrometer. The study revealed that the concentration of trace metals such as iron, copper, manganese, zinc, and heavy metals like chromium, lead, and mercury was found within the permissible limits as prescribed by the WHO. Hence, it is concluded from the study that the amount of essential trace elements is within the permissible limit while the heavy metal was below the detectable limit. Therefore water from natural sources and their corresponding tap supplies are safe as far as trace and heavy metals are concerned.
关键词：natural source; supply water; seasonal variation; trace and heavy metals
