实验室数据表明，藻类生物量和细胞外产物很容易与氯反应生成三卤甲烷（THM）。此外，现场数据表明，供水水库中的藻类活动是加剧弗吉尼亚州北部费尔法克斯县水务局供水中THM水平的潜在重要因素。如果证据得到证实，控制供水中藻类的必要性将具有新的意义。包括14个参考文献、表格和图表。

Laboratory data have shown that algae biomass and extracellular products react readily with chlorine to form trihalomethanes (THMs). Furthermore, field data have implicated algal activity in a water supply reservoir as a potentially significant factor in exacerbating THM levels in the Fairfax County Water Authority supply in northern Virginia. If the evidence is borne out, the need for algae control in water supplies takes on new significance. Includes 14 references, tables, figures.