WATER SECURITYRadioactive Contamination Is Creeping into Drinking Water Around the U.S.
As mining, fracking and other activities increase the levels of harmful isotopes in water supplies, health advocates call for tighter controls.
This story is part of Ensia’s year-long investigation of drinking water contamination across the U.S. The series is supported by funding from the Park Foundation and Water Foundation. Read the launch story, “Thirsting for Solutions,” here and the other stories in the series here.
When Jeni Knack moved to Simi Valley, California, in 2018, she had no idea that her family’s new home was within 5 miles of a former nuclear and rocket testing laboratory, perched atop a plateau and rife with contamination. Radioactive cesium-137, strontium-90, plutonium-239 and tritium, along with a mix of other toxic chemicals and heavy metals, are known to have been released at the industrial site through various spills, leaks, the use of open-air burn pits and a partial nuclear meltdown.
Once Knack learned about the Santa Susana Field Laboratory and the unusual number of childhood cancer cases in the surrounding community, she couldn’t ignore it. Her family now only drinks water from a 5-gallon (19-liter) jug delivered by Sparkletts water service. In August, she began sending her 6-year-old daughter to kindergarten with two bottles of the water and instructions to not refill them at school, which is connected to the same Golden State Water Company that serves her home.
A federal report in 2007 acknowledged that two wells sourced by the water company were at risk of contamination from the site. “The EPA has said we’re at risk,” says Knack. And Golden State, she says, has at times used “possibly a very hefty portion of that well water.” To date, radioactivity above the natural level has not been detected in Golden State’s water.
Concerns Across the Country
All water contains some level of radiation; the amount and type can vary significantly. Production of nuclear weapons and energy from fissionable material is one potential source. Mining for uranium is another. Radioactive elements can be introduced into water via medical treatments, including radioactive iodine used to treat thyroid disorders. And it can be unearthed during oil and gas drilling, or any industrial activities that involve cracking into bedrock where radioactive elements naturally exist. What’s more, because of their natural presence, these elements can occasionally seep into aquifers even without being provoked.
