加州饮用水的石棉污染正在受到密切监测。初步结果表明，地表水中含有大量纤维，其分水岭包括蛇纹石，以及通过蛇纹石补给的地下水中的石棉。这些发现确实随季节而变化。水处理在去除石棉纤维方面取得了不同程度的成功。监测表明，该问题比之前认为的更为普遍，优化处理可提高石棉清除率。将石棉浓度与浊度联系起来的尝试仅在少数情况下效果良好。包括29个参考文献、表格和图表。

Asbestos contamination of California drinking water is being closely monitored. Preliminary results show that there are large fiber concentrations in surface waters whose watersheds include serpentine rock, as well as asbestos in groundwater recharged through serpentine rock. These findings do vary with the seasons. Water treatment has provided varying degrees of success in removing asbestos fibers. The monitoring has shown that the problem is more widespread than previously believed and that optimizing treatment improves asbestos removal. Attempts to correlate asbestos concentrations with turbidity worked well in only a few cases. Includes 29 references, tables, figures.