Jun 28, 2026 · 9 min · 10 segments
In this episode, we begin Season 3 by exploring one of the most important questions about PFAS: How do these forever chemicals get inside the human body? Once PFAS enter the environment, they can…
Over the last few episodes, we've unpacked the chemistry, the bonds that won't break, how PFAS travel, and how plants can absorb them.
We've talked about molecules, movement, accumulation, but none of that would've mattered if we couldn't answer one essential question: How do we even know PFAS are there? How do you measure something that has no color, no smell, no taste, and exists at levels so small they can sound almost fictional? Today we talk about dedication because before we move to season three, where we explore how PFAS affect the human body, we need to understand how scientists find the invisible.
When you hear phrases like parts per billion or parts per trillion, they sound abstract, so here's perspective.
One part per billion is like one drop of water in an Olympic-sized swimming pool.
Modern regulatory limits are often set in the single digits per part trillion.
So that means labs must detect chemicals at concentrations almost unimaginably small.
Over the last few episodes, we've unpacked the chemistry, the bonds that won't break, how PFAS travel, and how plants can absorb them.
We've talked about molecules, movement, accumulation, but none of that would've mattered if we couldn't answer one essential question: How do we even know PFAS are there? How do you measure something that has no color, no smell, no taste, and exists at levels so small they can sound almost fictional? Today we talk about dedication because before we move to season three, where we explore how PFAS affect the human body, we need to understand how scientists find the invisible.
When you hear phrases like parts per billion or parts per trillion, they sound abstract, so here's perspective.
One part per billion is like one drop of water in an Olympic-sized swimming pool.
Modern regulatory limits are often set in the single digits per part trillion.
So that means labs must detect chemicals at concentrations almost unimaginably small.
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