During a recent government meeting, officials highlighted significant strides made in addressing the environmental concerns associated with PFAS (per- and polyfluoroalkyl substances) at Part 139 airports, particularly Denver International Airport (DEN). These chemicals, commonly referred to as \"forever chemicals,\" have been integral in firefighting foams used for decades due to their effectiveness in combating petroleum-based fires. However, their persistent nature poses serious environmental risks, as they do not degrade in the environment.

In response to growing scientific understanding of PFAS, airport officials have implemented measures to mitigate these risks while adhering to federal mandates. Since 2017, DEN has transitioned to training foams that do not contain PFAS for its firefighting personnel. Additionally, the airport has collaborated with the Federal Aviation Administration (FAA) to modify its emergency response protocols. This includes a shift from using foam during timed response tests to utilizing only water, demonstrating a commitment to reducing PFAS usage.

In 2019, DEN became one of the first airports in the nation to adopt an input-based testing system for foam proportioning, allowing for the circulation of foam on firefighting trucks without the need for spraying it outside. Currently, DEN is excited to announce ongoing efforts with the Denver Fire Department to transition its firefighting rigs from PFAS-based foams to fluorine-free alternatives, which have recently received federal approval.

These initiatives reflect a proactive approach to environmental stewardship while maintaining safety standards in airport operations.