One type of drinking and industrial water pollution is arsenic contamination, which frequently results from naturally occurring high quantities of arsenic in deeper and industrial groundwater. Arsenic in drinking water has a 0.01 parts per million (ppm) limit set by the EPA. When arsenic levels in drinking water exceed 35 ppb, children are immediately at risk (0.035 ppm).
When arsenic levels in drinking water exceed 130 ppb, adults are at risk (0.130 ppm). The current WHO standard for arsenic in drinking water is 10 g/L, or 0.01 ppm, although this figure is only a guideline because it is difficult to remove arsenic from drinking water. For details visit: https://watermanaustralia.com/arsenic-removal-from-drinking-and-industrial-water/