The non-profit Environmental Working Group (EWG) released their data and analysis on 23 of the largest water sources in the United States, including San Antonio’s.
Chromium-6, the toxin at the center of the Erin Brockovich movie, was deemed to be at an unsafe level in the drinking water of more than 200 million Americans in all 50 states, according to EWG. California state scientists determined that concentrations of chromium-6 that were larger than 0.02 parts per billion in tap water could cause increased cancer risks.
State regulators, however, settled on a legal limit of chromium-6 in drinking water to be 500 times larger than the proposed limit by the California scientists, says EWG.
According to Fox 29 San Antonio, the San Antonio Water System tests the water constantly for toxins, including chromium-6, and no problem has been detected. Mark Hamilton of Edwards Aquifer Authority told Fox 29 San Antonio that much of the chromium-6 in San Antonio tap water is due to natural deposits and in very low concentrations.
In addition, the San Antonio Water System claimed the amount of chromium-6 they’ve discovered is much lower than in the EWG data analysis, reports Fox 29 San Antonio.
The following information is provided by Environmental Working Group (EWG) regarding chromium-6: