Microplastics are tiny and typically derive from larger objects. They are often broken down by sunlight, oxygen, or friction. This blog addresses concerns that plastic piping systems, such as polyethylene (PE), crosslinked polyethylene (PEX), polyethylene of raised temperature (PE-RT), polypropylene (PP), and chlorinated polyvinyl chloride (CPVC) leach microplastics into drinking water and contaminate the water supply.