Pittsburgh International Airport (PIA) in the US has claimed that it will be unaffected by new de-icing regulations set by the Environmental Protection Agency (EPA).

The EPA proposal requires all airports to collect 20% of the runoff caused by de-icing chemicals that could dilute water sources.

The airport believes it currently collects 60% of its runoff and has played its part in protecting the environment by using a de-icing pad since 2002.