Update
Rincon Water imports 100% of its potable water supplies from our wholesaler, the San Diego County Water Authority (SDCWA). These water supplies are treated at the Lake Skinner reservoir in Riverside County before being delivered into Rincon Water’s pipelines. Recent samples of water from Metropolitan Water District’s (MWD) Lake Skinner reservoir in Riverside County show an increase in algal activity, which may influence the taste and odor of tap water in parts of the San Diego County. These taste and odor changes do not create any health risks; all water being delivered by SDCWA member agencies meets state and federal safety standards.
Algae growth is a common challenge at lakes around the world when air and water temperatures are elevated for long periods, typically the late summer and early fall. And with extreme temperatures which occurred several weeks ago, its no surprise that algae bloom activity at Lake Skinner has occurred. The SDCWA is continuing to work closely with MWD to monitor and minimize taste and odor events.
More about Algae
Certain freshwater algae produce organic compounds (such as geosmin and methylisoborneol) that give water an earthy or musty smell. Most consumers can detect methylisoborneol at concentrations of roughly 10 parts per trillion (ppt). Recent water samples at Lake Skinner show levels up to 36 ppt, however, water treatment plants around the county will reduce the levels by varying degrees depending on the processes available at each plant.
As cooler weather begins, the odor and taste associated with algae blooming will begin to dissipate. Until then, you can refrigerate your drinking water which will help to reduce the aesthetic issues.