Microplastics Are Next. Your Office Water System Won't Be Ready.

The EPA just set the strictest drinking water standards in history for PFAS. Four parts per trillion for PFOA and PFOS — among the lowest levels ever regulated under the Safe Drinking Water Act.

But while everyone's scrambling to meet PFAS compliance, there's another contaminant the EPA is quietly studying. One that's already in your office water system right now.

Microplastics.

The Next Wave Is Coming

EPA hasn't set federal microplastics regulations yet, but they're conducting research and monitoring studies. That's regulatory speak for "we're figuring out how bad this is before we tell you how to fix it."

Here's what I know from selling water systems: when EPA starts "monitoring studies," regulations often follow.

On April 2, 2026, EPA published its draft sixth Contaminant Candidate List, and for the first time microplastics are on it as a contaminant group, alongside PFAS, pharmaceuticals and disinfection byproducts. The list is the Safe Drinking Water Act's on-ramp: it is where EPA names the contaminants it may regulate next, then decides one by one whether to.

Correction, September 2026: an earlier version of this post said microplastics were already on the fifth list. They were not. CCL 5, finalized in November 2022, has 66 chemicals, three chemical groups and 12 microbes, and microplastics are not among them. The draft CCL 6 is the first list to include them, and a listing does not by itself require monitoring. The final CCL 6 is due by November 17, 2026.

The question isn't if, but when.

Your Office Is Making It Worse

Full disclosure: I sell bottleless water systems. But here's the irony — your current office setup is probably contributing to the problem EPA is studying.

Those plastic bottles stacked in your breakroom? Plastic. That jug on your cooler? Plastic. Every time someone drinks, plastic particles can leach into the water.

We're literally drinking the container.

I see offices go through many plastic bottles per month. Each one potentially adding microplastics to the very water people think is "pure."

The Pattern Repeats

This is the same cycle we saw with PFAS. For years, "forever chemicals" were an abstract concern. Then studies showed PFAS in people's blood. Then public water systems got monitoring requirements by 2027 and compliance deadlines by 2029 (EPA proposed in May 2026 to push the PFOA/PFOS deadline to 2031).

Now offices are scrambling to figure out PFAS compliance after the rules dropped.

Microplastics could follow a similar path. EPA research turns into monitoring requirements. Monitoring reveals contamination levels. Contamination levels become maximum allowable limits.

Companies that wait may find themselves reactive again.

What Actually Fixes This

Point-of-use filtration eliminates the plastic container problem entirely. No bottles. No jugs. No microplastic leaching during storage and transport.

But most offices won't switch until they have to. They'll keep buying plastic bottles while EPA studies the plastic particles in their employees' water.

The companies that get ahead of this understand something simple: you can address the microplastics issue before it potentially becomes a compliance problem.

Your office water system is either part of the solution or part of what EPA is studying. There's no middle ground on microplastics.

The research phase eventually ends. Regulations may follow. The question is whether you'll be ready or scrambling.

Update, September 2026: EPA's proposed sixth Unregulated Contaminant Monitoring Rule (UCMR 6), published July 1, 2026, does not include microplastics. EPA's stated reason is that there is no validated drinking-water analytical method with the accuracy and precision UCMR needs, and one cannot be built inside the statutory window. Since UCMR cycles run about every five years, that pushes nationwide microplastics monitoring out past 2030. The candidate listing stands; the measuring is what is stuck.