The most common cause of this type of problem is the drain. Over time, organic matter (such as hair, soap, and food waste) can accumulate on the walls of the drain and cause bacteria to grow on these organic deposits. To make sure the problem is not in the tap water, fill a glass with a small amount of tap water, then step away from the sink and swirl the water around inside the glass. If the problem is in the drain, the tap water in the glass should not have an odor.
These odors may be caused by an algae bloom. On occasion, mainly during periods of warm weather, CCWD can experience unusually large algal blooms in our source water, some consumers may experience some unpleasant taste and/or odor associated with their drinking water - musty, dirty or "earthy". Some important information and tips to know:
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If you recently moved to the service area, your new water may taste different to you. Just as various brands of bottled water taste different due to the varying minerals they contain, the taste of domestic drinking water also varies with its source(s). Be assured that the drinking water that we provide meets or surpasses all State and Federal drinking water standards.
It is important to determine if the odor exists in the public water supply, premise plumbing, environment (potential drain odor).
If your plumbing is the source of the odor, you can try to flush the plumbing system or you can consult a licensed plumber. Contact CCWD at (925) 688-8156 if you suspect the water supply.Test for Odors
When you detect an odor in your tap water, we recommend that you perform what we call a glass test at the faucet.
Chlorinous, Bleachy, Chemical or Medicinal Taste/OdorThere are two common causes for a chlorinous, bleachy, chemical, or medicinal taste or odor in the water.
If the problem is the water supply, it will occur at every faucet and will not go away after a few minutes of running the water. An easy way to get rid of the chlorine taste and smell is to let water sit in a glass for a few minutes. Then, put the water in a covered container and chill it in the refrigerator. Cold water tastes and smells better than water at room temperature.
Although the total chlorine level is a fraction of what is found in pools and spas, you may occasionally detect the smell of chlorine in your water. This odor may be particularly strong in the shower since chlorine is released to the air more rapidly when mixed with hot water.
Foul, Sulfurous, Rotten Egg, and Sewage Odor
If you smell gasoline or an organic solvent odor in the cold water, call us immediately at (925) 688-8156 for further assistance. This problem is rare and potentially serious. Do not use the water. It is possible that your meter box was exposed to a hazardous substance.