Test the Water

Langan at the Forefront on PFAS-Contaminated Drinking Water

Federal and state agencies are adopting stringent drinking water standards to protect against risks associated with PFAS. While regulations may vary from agency to agency, the goal remains the same for water purveyors: support the community by identifying and implementing effective and economical remedies for PFAS-contaminated drinking water.

PFAS presents many challenges that must be considered when designing and operating PFAS-removal treatment systems. The chemicals are highly soluble, have both hydrophobic and hydrophilic properties, and contain strong intermolecular bonds, all of which limit many conventional treatment technologies. While tried-and-true treatment methods exist, they can be costly to install, operate, and maintain, including management of PFAS waste. Additionally, stringent drinking water standards require treatment methods to reduce PFAS to nearly non-detectable levels. To navigate these obstacles, involved parties should engage a consultant with knowledge and experience in PFAS treatment.

Designing these treatment systems is not a one-size-fits-all approach, however, three technologies are typically used to help remove PFAS from drinking water: granular activated carbon, ion exchange treatment, and high-pressure membrane systems. An experienced environmental team understands the importance of conducting a thorough evaluation of possible treatment options based on site conditions, system demand, water quality, and operation and maintenance feasibility.

Langan is well-versed in narrowing down potential options and enlisting its in-house treatability team to perform pilot studies, pinpoint the appropriate technology, derive system design criteria, and identify potential challenges related to the proposed treatment alternative. The firm’s multidisciplinary approach allows teams to implement the design holistically and in sync with contractors, and develop operation, maintenance, and monitoring documentation to support future system management. By participating in this process, engaging a consultant with experience navigating the regulatory framework, and communicating with residents and regulators, water purveyors are better prepared to address community concerns about PFAS.

Kimberly Semon, PE, LEED GA, has over 10 years of experience in chemical, environmental, and water engineering. Her expertise includes treatment of emerging contaminants in groundwater, groundwater hydrology, water resource planning and management, environmental oversight, and subsurface remedial design and implementation. She is also well-versed in New York City and State regulatory programs, including the Brownfield Cleanup Program and Voluntary Cleanup Program.