Arsenic level in well dropping lower |

Arsenic level in well dropping lower

The Northside Well, which provides water to parts of downtown Truckee, Donner Lake and Tahoe Donner, is now back on-line after high arsenic levels caused a temporary shut down earlier this summer.

The arsenic level in the Northside Well had been at 44 parts per billion, well over the Environmental Protection Agency’s maximum allowance of 10 ppb.

The well has since been brought down to 17 ppb, said Ed Taylor, water utility manager for the Truckee Donner Public Utility District. To bring down arsenic levels further, the utility is pumping Northside well water into a tank fed by four other sources. That, Taylor said, will dilute the arsenic level to within EPA standards.

The well will be shut down again in September or October when water demand diminishes so that the district can continue with testing and repair work. Customers will not be impacted by the well’s closure, Taylor said.

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