RES 87212 - Laserfiche WebLink

River, such flow more rapidly draws down the level of Folsom Reservoir and reduces recreational activities at the reservoir, The Board also evaluated the impact on the lower American River if the Bureau diverted S90,OO0 AFA via the Folsom-South Canal, The hydrology studies indicate that the flow in the lower American River would be reduced and would cause a reduction in virtually all public trust uses, WATER QUALITY/PUBLiC HEALTH RISK The A~erican River has water of exceptionally high quality, The quality of the - water in the American River is better that the quality in the Sacramento ~ive~ and is much better than the quality in the Delta. Water from any of these three alternative Sources could be utilized by EBMUD. Proper treatr~.nt an~ "blending" with water from the Hokelumne River would produce water that wo~ld meet all current drinking water standards. Trihalomethane (THM) is one of the principal concerns in this case. TH'.~ is a suspected carcinogen that is formed when chlorine is added to the water d~"inl the treatment process. As a relative comparison of water quality, the trihalomethane forqqation potential (THMFP) values for the American River, Sacramento River and Delta are 58, 8D and 162 ug/L respectively. The Board evaluated the theoretical health risk for the mininxJm and maxinure conditions for the three alternative sources; however, limitations in the data and the methodology used to calculate the theoretical health risk make it ' difficult to precisely define the relative health risk of the three sites. The following findings are drawn from our evaluation. 12