Sandhu S S, Nelson P, Warren W J
Bull Environ Contam Toxicol. 1975 Oct;14(4):465-72. doi: 10.1007/BF01705514.
Drinking water supplies of 161 rural communities, in Georgetown County, South Carolina, were randomly selected for sample collection. The analysis showed that most of the waters were slightly acidic. Low, but acceptable concentrations of chloride, copper, fluoride, sodium, cadmium, nitrate and phosphate were found. A few water samples showed higher then recommended levels of arsenic, mercury, zinc and lead. Although only 2% of the samples exceeded the mandatory limit of 0.05 ppm for arsenic, 72% exceeded the recommended level of 0.01 ppm. The mandatory limit for manganese was exceeded in 37% of the waters while 88% exceeded the limit for iron. The high iron content was generally responsible for the high turbidity found in 45% of the samples. The well depth and the consumer income had some bearing on water quality. Statistical evidence suggested that septic tank seepage was partially responsible for nitrate, phosphate, iron and arsenic contamination of shallow water supplies. Lead concentrations appear to vary according to the plumbing used and the pH of the waters.
南卡罗来纳州乔治敦县的161个农村社区的饮用水供应被随机选取用于样本采集。分析表明，大多数水呈微酸性。检测到氯化物、铜、氟化物、钠、镉、硝酸盐和磷酸盐的浓度较低，但在可接受范围内。一些水样中砷、汞、锌和铅的含量高于推荐水平。虽然只有2%的样本超过了砷的0.05 ppm法定限值，但72%的样本超过了0.01 ppm的推荐水平。37%的水样中锰含量超过法定限值，88%的水样中铁含量超过限值。高铁含量通常是45%的样本中浊度较高的原因。井深和消费者收入对水质有一定影响。统计证据表明，化粪池渗漏是浅水供应中硝酸盐、磷酸盐、铁和砷污染的部分原因。铅浓度似乎因所使用的管道和水的pH值而异。
