The importance of clean drinking water cannot be overstated, especially when it comes to preventing health issues such as cancer. A recent study by the Environmental Working Group (EWG) has shed light on the benefits of a multi-contaminant approach to water treatment, which could potentially prevent over 50,000 lifetime cancer cases in the United States.
Traditionally, regulations have focused on addressing one tap water contaminant at a time. However, the EWG study suggests that treating multiple pollutants simultaneously can have a more significant impact on public health. By analyzing data from thousands of community water systems, researchers found that cancer-causing chemicals like arsenic and chromium-6 often coexist in water sources and can be effectively treated using the same technologies.
In particular, the study highlights the potential benefits of reducing arsenic levels alongside chromium-6 contamination. By lowering arsenic levels by 27% to 42% in water systems with chromium-6, the number of prevented cancer cases could quadruple compared to addressing chromium-6 alone.
Chromium-6, famously portrayed in the movie “Erin Brockovich,” is known to increase the risk of stomach cancer, liver damage, and reproductive harm even at low levels in drinking water. Arsenic, on the other hand, is linked to bladder, lung, and skin cancers, as well as cardiovascular and developmental issues. Both contaminants are commonly found in drinking water across the U.S., making a multi-contaminant approach to water treatment all the more crucial.
Nitrate, another common water pollutant, is often found downstream from agricultural areas and is associated with health risks such as colorectal and ovarian cancer, preterm birth, and neural tube defects. The current federal limit for nitrate in drinking water has not been updated in over 30 years, despite evidence suggesting that lower levels can still pose health risks.
To address these challenges, the EWG advocates for smarter water regulations that consider the cumulative impact of multiple contaminants on public health. By implementing proven technologies like ion exchange and reverse osmosis, water systems can effectively remove chromium-6, arsenic, and nitrate simultaneously, thereby reducing the risk of cancer and other health issues.
In the face of aging infrastructure and limited resources, small and rural water systems are particularly vulnerable to water contaminants. The EWG calls for increased funding and more effective regulations to support these communities in upgrading their water treatment facilities and safeguarding public health.
For consumers concerned about the quality of their tap water, installing a water filter can help reduce exposure to contaminants. Reverse osmosis systems are recommended for removing chromium-6, arsenic, and nitrate, while regular filter replacements are essential to ensure continued effectiveness.
In conclusion, the EWG’s research underscores the importance of a comprehensive approach to water treatment that addresses multiple contaminants simultaneously. By investing in cleaner water systems and adopting more stringent regulations, we can protect public health, prevent cancer cases, and promote equity in access to safe drinking water.
