Arsenic in well water
Naturally-occuring arsenic can be a problem for Oregonians who depend on well water. You cannot smell or taste arsenic, but drinking it can raise risk of cancer and harm the skin, circulatory system, nervous system, lungs and bladder.
- Wells should be tested at least once for arsenic.
Regular testing is recommended in some parts of Oregon where high arsenic is common. Oregon Heath Authority offers more information on how to get tests. The tests costs about $30- $45 from an accredited lab. - Arsenic at levels over 10 ppb are not safe for drinking. If levels are as high as 99 ppb, water should not be used for irrigating gardens. Levels over 500 ppb are not safe for bathing, washing dishes, or doing laundry.
- Some kinds of filters are effective at removing arsenic from water, but they may not work well if you have high levels of iron or manganese in the water. Filters must also be regularly maintained to be effective. Because you can’t taste arsenic, it is best to consult a water quality company to make sure a filter system will work.
- Nitrates can also be a problem in Oregon well water. Learn more.
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