Does tap water from the treatment plant still have microplastics when it reaches your faucet?

What's actually in it

Surface water and groundwater carry microplastic particles from clothing fibers, tire wear, and broken-down plastic waste. Water treatment plants use filtration and coagulation to remove particles. Then the water travels through miles of pipe to your house. Pipes and fittings can add plastic back.

Microplastics at tap-water levels aren't causing acute illness. The concern is long-term: decades of swallowing tiny plastic particles and their associated additives.

What the research says

A 2025 study in NPJ Clean Water measured microplastics at ten drinking water treatment plants and then at the consumer's tap. Treatment plants removed the large majority of microplastics from the raw water. Distribution pipes and fittings reintroduced some, and a small but measurable concentration reached the kitchen sink.

Bottled water still has many more microplastics than most tap water, so switching to bottles makes it worse, not better. The best cuts come from a quality home filter: activated carbon catches some particles, and reverse osmosis catches nearly all of them.

If your cold water tastes fine, drinking it is safer than bottled. Add a filter for another layer, and store the filtered water in glass or stainless steel.