两种大肠杆菌噬菌体方法，方法1601（富集法）和方法1602（单琼脂层计数法）进行了地下水粪便污染指标筛选的现场试验。用于研究的地下水样本取自德克萨斯州埃尔帕索附近美墨边境脆弱含水层内的17口浅层公共供水井。对收集的样本进行筛选，以确定是否存在体细胞和雄性特异性大肠杆菌噬菌体，以及是否存在细菌指示剂E。 大肠杆菌和肠球菌。包括10个参考文献和表格。

Two coliphage methodologies, Method 1601 (enrichment method) and Method1602 (single agar layer enumeration method) were field tested for groundwater screening for indicators of fecal contamination. Groundwater samples used for the studywere obtained from 17 shallow public water supply wells located within vulnerable aquifers along the US-Mexico border near El Paso, Texas. The collected samples were screened for the presence of somatic and male specific coliphages and for the presence of bacterial indicators, E. coli and enterococci. Includes 10 references, tables.