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Environment – Water & Sewer Utilities – Drinking Water – Water Quality

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1. Is there fluoride in my water?

All drinking water naturally contains some fluoride. Community water fluoridation is the process of adjusting the naturally occurring fluoride level to the optimum level for preventing tooth decay. The Evergreen, North San José, and Alviso communities all receive fluoridated water supplies, in which the fluoride levels are maintained within a range of approximately 0.7 to 1.3 parts per million (ppm). For further information on the specific levels of fluoride in your area, please refer to the most recent Water Quality Report. Water Quality Report

2. Can I get my water tested?

In order to ensure that tap water is safe to drink, the United States Environmental Protection Agency (USEPA) and the California Department of Public Health (CDPH) prescribe regular monitoring requirements for all public water systems. San Jose Municipal Water System performs this testing within our service areas on a routine basis, and will inform you if the water ever fails to meet drinking water standards.

For any additional testing that you may want done on the quality of your water, please contact a private laboratory to assist in taking and analyzing a sample. The USEPA or the CDPH can provide further guidance on testing your water or selecting a private laboratory.

3. Why does my water smell?

In the Evergreen, Alviso, and North San José communities, water is disinfected using chloramine. Except for a slight chlorinous taste or odor, chloramine is not harmful to the general public, and is necessary to destroy disease-causing organisms for the protection of public health. To remove the chloramines and the associated odor, fill a pitcher with water and let it sit on the counter or in the refrigerator to allow the chloramine to dissipate.

For other odors or for further guidance, please call the San Jose Municipal Water System’s Engineering section at (408) 277-3671.

4. Why is my water brown?

One way to determine where the problem is originating is by observing the water at the hose bib closest to your water meter. If the water coming from this location is clear, this indicates that the problem is occurring with the interior plumbing, possibly due to sediment in the pipes or an aging plumbing system. To flush your lines, remove any aerators on your faucets and let the cold water flow until the water is clear again. If the problem persists, a plumber will be able to inspect your plumbing and determine what may be causing the problem.

If the water coming from your hose bib is colored, please call the San Jose Municipal Water System’s Engineering section at (408) 277-3671.

5. What is my water hardness?

Hardness consists mainly of calcium and magnesium salts. Although it does not pose a health risk, it may be considered undesirable for other reasons. The level of hardness in the water supply varies by service area. For information on the specific hardness levels in your area, please refer to the Water Quality Report. To convert hardness from ppm to grains per gallon, divide by 17.1. Water Quality Report