Pennsylvania roads are being coated in radioactive wastewater—here's why

Pennsylvania roads are currently being coated with radioactive wastewater from oil and gas operations, raising concerns among residents and scientists. A recent permit issued by the state’s Department of Environmental Protection in May 2026 could allow this wastewater, known as brine, to be sold as a commercial product for road maintenance purposes. This development follows a long-standing practice where brine was used to suppress dust on dirt and gravel roads and to melt ice on paved surfaces. However, the state halted the practice in 2018 due to environmental and public health concerns. Brine is a byproduct of oil and gas extraction, consisting primarily of highly saline water containing radium, a known carcinogen, as well as other contaminants such as petroleum hydrocarbons and heavy metals. In northwestern Pennsylvania, the production ratio averages eight barrels of water per barrel of oil. This water, often five to ten times saltier than seawater, is generated from both conventional and unconventional, or “fracked,” gas wells. Until recently, brine from fracked gas wells was banned for road use, while conventional brine faced a moratorium in 2018. Prior to these restrictions, well operators provided the brine to local townships at no cost. The presence of radium and other harmful substances in brine poses potential risks to both human health and the environment. Radium, in particular, is a radioactive element that can accumulate in waterways and soil. When brine is applied to roads, contaminants wash off into nearby streams and sediments, potentially harming aquatic life and degrading water quality. Salt from the brine can also damage infrastructure, corroding bridges and vehicles, and may seep into groundwater supplies through nearby drinking water wells. While direct consumption of the brine is rare, indirect exposure through inhalation of airborne radium or ingestion of contaminated fish remains a concern. Despite similarities in chemical composition between conventional and unconventional brine, regulatory treatment differs significantly. Federal guidelines aim to minimize radiation exposure, setting a limit of five picocuries per liter for combined radium activity in drinking water. However, current regulations do not fully address the risks associated with applying brine to roads. Studies show that even small amounts of radium can persist in the environment, especially under certain weather conditions. Researchers like William Burgos and Nathaniel Warner, environmental engineering professors at Penn State, have found that brine does not perform effectively as a dust suppressant, further questioning its utility and safety. The proposed commercial sale of brine represents a shift in how the industry manages its waste. With the new permit, road maintenance companies and snow removal services could purchase brine as a cost-effective alternative to traditional road treatments. This change comes amid ongoing debates over the environmental impact of oil and gas operations. Residents in affected areas continue to report sightings of brine being spread on roads, despite previous bans. Scientists warn that without stricter oversight, the continued use of brine could exacerbate existing pollution problems and introduce new health risks. As the state moves forward with this policy, the focus will likely shift toward monitoring the long-term effects of brine application on local ecosystems and public health. The role of regulatory agencies in ensuring compliance with safety standards will be crucial in determining the future of this practice. Meanwhile, researchers and community advocates remain vigilant, urging greater transparency and accountability in how oil and gas waste is managed and utilized.