SAN JOSE (KCBS) – A new study indicates trace amounts of NDMA, a potentially dangerous chemical that is believed to cause cancer, in San Jose groundwater.

Santa Clara Valley Water District officials say NDMA was found at levels of three to four parts per trillion down to 30 feet in the groundwater at the test site on Silver Creek Valley Road. The state has a public-health goal of three parts per trillion for NDMA.

KCBS’ Chris Filippi Reports:

The chemical appears to have spread from recycled irrigation water to shallow groundwater. The US Environmental Protection Agency calls the chemical a suspected human carcinogen.

“The study did not address the deeper aquifers at all, so it only looked at the upper aquifers, and no one is drinking that water,” said Joan Maher, who manages the water supply division for the Santa Clara Valley District.

“I think it indicates a need to look at the treatment processes and look at how we’re going to expand recycled water,” said Maher.

The study comes as the district and city of San Jose are building a $50 million dollar water treatment plant.

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  1. Wynn Grcich says:

    Dr. Winn Parker gave the NDMA study to the city council of Millbrae in 2003. This was a reason not to use chloramine as a disinfectant, especially in recyled waste water. Alternative engineering tecnology is the answer to disinfect water without adding toxic chemcials which make secondary byprouds. Millbrae opens their recycling plant this year and will eventually have NDMA in their water too. I googled:”Which cities have NDMA in their water? Most of the cities which use chloramine as a disinfectant in recyled water. Millbrae city council didn’t care. They also didn’t care about CA state assembly bill 2283 bio-chemcial creamations. More disinfectant byproducts will be created when dead bodies are being wash down the drain after being liquified in potassium hydroxide and put into chlormanated water.
    Wynn Grcich