饮用水机构通过水源选择、污染预防和处理，保护客户免受一系列化学和生物污染物的影响。拥有地表水库的机构现在还必须意识到被归类为持久性、生物累积性和有毒污染物（PBT）的化学品的直接和间接影响。本文讨论了饮用水机构和专业组织对EPA项目方向和事先规划的早期认识如何维持公众对其地表水饮用水供应的信心。 包括4个参考文献、图表。

Drinking water agencies protect their customers from a host of chemical and biological contaminants using source selection, pollution prevention and treatment. Agencies with surface water reservoirs must now also be aware of the direct and indirect impacts of chemicals categorized as persistent, bioaccumulative and toxic pollutants (PBT). This paper discusses how early awareness of EPA's programmatic direction and prior planning by drinking water agencies and professional organizations will maintain the public's confidence in its surface water drinking supplies. Includes 4 references, figures.