Water & the Body

A child in Des Moines recently wrote a letter to his state representative about not being able to drink the water from the tap. Why? Des Moines, Iowa has a water problem. This is not Flint. Des Moines has had to build one of the largest nitrate removal plants in the world just to make its tap water safe. It costs more than $10,000 a day to operate.CNN The science of what's in the water is one story. What it does inside the body is another.

The first article in this series documented the contamination picture — the 176 million Americans drinking PFAS-laced water, the pharmaceuticals and microplastics only now being officially acknowledged, the regulatory rollbacks, and the atmospheric deposition that means there is no longer an uncontaminated water source on Earth. This article goes deeper: into the body, into the cell, into the molecular mechanisms by which these contaminants impair the systems that keep us alive and functional.

What follows is grounded in peer-reviewed research. Where the science is established, we say so. Where it is still developing, we say that too. The distinction matters — because the story is alarming enough without overstating what we know.

What Survives the Treatment Plant

Municipal water treatment was engineered to address a specific set of threats: bacterial pathogens, sediment, turbidity, and a handful of regulated chemical contaminants. It was not designed to remove pharmaceuticals. It was not built with microplastics in mind. And for the most part, it doesn't remove them.

The pathway from medication to tap is straightforward and well-documented. People take medication. Their bodies metabolize some of it, but a significant fraction passes through unaltered and enters the wastewater stream through urine and feces. Some medications are flushed directly. Veterinary drugs follow the same pathway through agricultural runoff. Wastewater treatment plants — even well-functioning ones — are not equipped to intercept these compounds. They flow through, enter surface water and groundwater, and make their way back into drinking water supplies.Harvard Health

A comprehensive survey by the US Geological Survey found pharmaceuticals in 80% of streams sampled across 30 states — including antidepressants, antibiotics, blood thinners, heart medications, hormones, anticonvulsants, beta-blockers, and lipid regulators.FloWater/USGS A 2024 peer-reviewed study of treated drinking water from treatment plants nationwide confirmed that six pharmaceutical classes remain detectable after treatment — with antihypertensives and antidepressants the most prevalent.PMC These are not trace contaminants from a single unusual source. They are the chemical fingerprint of a medicated population passing through infrastructure that was never asked to catch them.

Conventional treatment methods reduce some compounds but not consistently and not completely. Chlorination degrades certain pharmaceuticals — acetaminophen, codeine, some antibiotics — but leaves others intact or creates transformation byproducts whose effects are even less understood. Reverse osmosis achieves up to 99% removal of active pharmaceutical ingredients, but standard municipal systems don't use it at that scale.Springer

One of the least-discussed downstream effects is antibiotic resistance. When antibiotics pass through treatment plants and into waterways at sub-therapeutic concentrations, they don't kill bacteria — they train them. Chronic low-level antibiotic exposure in the environment is an accelerant for the development of antibiotic-resistant strains that then re-enter the human population.PMC/NIH This is a public health crisis compounding another public health crisis — invisible, unregulated, and largely unmonitored.

Vulnerable populations face disproportionate risk. Infants drinking formula mixed with tap water receive these compounds in concentrations their bodies are less equipped to process. The elderly, who are often the heaviest medication users and whose kidneys are less effective at filtration, face both ends of this cycle: their medications enter the water supply, and they consume others' medications back through their tap.

→ Further reading: Solutions & Accountability — what advanced treatment can do, and why it isn't being deployed

The Microplastic Body Burden

Microplastics are no longer an environmental story. They are a human biology story. Particles have now been confirmed in human blood, lungs, liver, placenta, breast milk, sputum, urine, feces, and brain tissue.PMC The question has shifted from whether microplastics enter the body to what they do once inside it.

The short answer is that the science is still developing — and the article will say that clearly. No established safe exposure threshold currently exists for humans. But the documented biological responses are significant enough to warrant serious attention, and the trajectory of research is not reassuring.

The neurological thread deserves particular attention. The blood-brain barrier is one of the body's most selective defenses — a membrane that protects the brain from toxins, pathogens, and harmful substances. Research now confirms that nanoplastics can breach it. Once inside neural tissue, they disrupt dopamine, serotonin, and glutamate signaling — the neurotransmitters governing mood, motivation, cognition, and behavior.Frontiers 2025 The implications for mental health, cognitive function, and neurodegenerative disease are still being mapped — but the mechanism is documented and the exposure is universal.

The scale of human consumption is worth pausing on. Research estimates that humans consume approximately 142,000 to 154,000 microplastic particles per person per year — equivalent, after recalculation, to roughly 50 plastic bags per person annually.PMC That figure comes from ingestion through water, food, and air combined. Drinking water is one of the primary vectors.

→ Further reading: The Signal in the Water — what microplastic-free, mineral-rich water looks like at the cellular level

PFAS and the Mitochondria: Bioenergetic Failure

Of all the mechanisms documented in this investigation, the link between PFAS and mitochondrial dysfunction is the most precisely understood — and the most consequential. Multiple independent peer-reviewed studies have now established not just that PFAS impairs cellular energy production, but how it does so at the molecular level.

The mitochondria produce ATP — adenosine triphosphate, the fundamental unit of energy that powers every biological process — through the electron transport chain (ETC). This chain is a series of enzyme complexes embedded in the inner mitochondrial membrane. Electrons flow through these complexes, pumping protons across the membrane and creating an electrochemical gradient. That gradient drives ATP synthase — the molecular machine that manufactures ATP. Disrupt the chain, and energy production collapses.

PFAS disrupts the chain. Specifically:

What makes these findings particularly significant is the population affected. The placental studies document mitochondrial damage in the cells responsible for nutrient transport between mother and fetus — meaning PFAS-induced bioenergetic failure is happening at the earliest and most critical stages of human development. Pregnant women who drink more water than average are, by necessity, receiving higher PFAS doses.PMC

The systemic implication is this: if PFAS impairs mitochondrial function across cell types — heart cells, placental cells, liver cells, pancreatic beta cells — and if 176 million Americans are chronically exposed through their drinking water, then we are looking at a population-level drag on cellular energy production. Not a dramatic acute toxicity event. A slow, chronic, molecular impairment of the machinery that runs every biological process in the human body.

→ Further reading: The Signal in the Water — what restored mitochondrial function looks like, and what the regenerative science says

It's in the Rain: Atmospheric Deposition and Global Reach

The first article noted that research now confirms PFAS in rainfall globally. Here is what that research actually shows.

PFAS enter the atmosphere through multiple pathways: industrial stack emissions, fugitive dust from contaminated sites, and — critically — sea-spray aerosols. When PFAS-contaminated water evaporates or is aerosolized at the ocean surface, the chemicals are carried into the atmosphere and transported globally. Volatile PFAS precursors like fluorotelomer alcohols exist in the gas phase and can travel thousands of miles before oxidizing into persistent PFAS compounds and depositing through rainfall.Remediation Journal 2025

Research by Stockholm University and ETH Zurich — published in Environmental Science & Technology — found that rainfall virtually everywhere on Earth now contains PFAS levels that exceed safety limits set by the EPA and other regulatory bodies. The authors proposed that PFAS contamination has crossed a "planetary boundary" — a global threshold beyond which normal environmental and human development is compromised.WEF/Stockholm University Planetary boundaries are not rhetorical. They are the same framework used to describe climate change. PFAS contamination has been placed in that category.

In southeastern Florida, analysis of 42 rainwater samples found PFAS in 95% of them, with concentrations of PFOS and PFOA exceeding EPA drinking water guidelines. The sources included African dust storms, vehicle emissions, power plants, and incineration facilities — a global cocktail depositing locally.RSC 2026 A Nature Geoscience study analyzing over 45,000 surface and groundwater samples from around the world found that a substantial fraction exceed PFAS drinking water guidance values — with exceedance rates above 50% in some regions.Nature Geoscience 2024

The polar regions make the point most starkly. PFAS have been documented in snow on the Tibetan Plateau, in the Alps, in the Arctic, and in Antarctica — regions with no local industrial sources. The "Antarctic snow amplification effect" describes how snow scavenges PFAS from the atmosphere, concentrating them, and then releases them into seawater during melt. Sixteen distinct PFAS compounds have been measured in Antarctic snow samples.Frontiers Environmental Science 2025 There is no remote enough location to escape atmospheric deposition. There is no uncontaminated water source on Earth.

This has a specific implication for the communities globally who rely on rainwater collection as their primary drinking water source. In arid and tropical regions where piped infrastructure doesn't exist, people drink atmospheric deposition directly. They are consuming the global chemical record without filtration of any kind.

→ Further reading: Solutions & Accountability — community-scale filtration responses in regions without infrastructure

The Bioelectric Layer: When Contaminants Attack Cell Voltage

Beneath the organ-level and tissue-level effects documented above is a more fundamental disruption — one that connects contaminated water to the basic electrical architecture of living cells. This is the layer that Article 1 introduced and that Article 3 will explore in its regenerative context. Here we focus on the damage side: what these contaminants do to bioelectric function.

Every cell in the human body maintains a voltage differential across its membrane — a charge separation between inside and outside that drives ion exchange, nutrient transport, nerve signal transmission, and energy production. This is not metaphorical. Cells are literally batteries. The sodium-potassium pump — which maintains this voltage — runs continuously, consuming roughly 20-40% of all the ATP the body produces. When ATP production is impaired (as documented in the mitochondrial section above), the pump falters. When the pump falters, membrane voltage drops. When membrane voltage drops, cellular function degrades across every system simultaneously.

PFAS compounds also directly impair the integrity of cell membranes themselves. Research has shown that PFAS increases membrane permeability in ways that disrupt normal cellular selectivity — the cell's ability to control what enters and exits.OAE Publishing A membrane that can't maintain its selectivity can't maintain its voltage. A cell that can't maintain its voltage can't function normally, generate energy efficiently, or resist damage from additional insults.

The neurological implications of this are emerging rapidly. PFAS has been detected accumulating in brain tissue. Microplastics that cross the blood-brain barrier carry chemical additives — phthalates, bisphenols, heavy metals — that interfere with dopamine, serotonin, and acetylcholine signaling.Vibrant Wellness 2025 These are not exotic neurotransmitters. Dopamine governs motivation and reward. Serotonin regulates mood and sleep. Acetylcholine mediates memory and muscle control. When the bioelectric environment of the brain is degraded by contaminants that impair membrane function, disrupt mitochondria, and interfere with neurotransmitter signaling simultaneously, the downstream effects — fatigue, cognitive fog, mood dysregulation, disrupted sleep — begin to look less like isolated symptoms and more like system-level responses to system-level damage.

This is not a claim that contaminated water causes depression or cognitive decline. It is a documented mechanistic pathway through which chronic exposure to contaminants already present in most Americans' drinking water impairs the biological systems that support mental and physical energy. The distinction matters. The documented pathway is enough.

→ Further reading: The Signal in the Water — the restoration side: what optimal bioelectric cellular function looks like and what the science of regenerative hydration says

Live: What's Happening Right Now

The Accumulation Problem

One of the most important concepts in understanding contaminated water's effects on the body is bioaccumulation — the way that compounds which don't break down concentrate over time in living tissue. PFAS don't just pass through. They bind to proteins, accumulate in organs, and build up with every exposure. A lifetime of drinking water at what regulators consider "safe" concentrations means a lifetime of accumulation. Safe thresholds were set for individual compounds. No threshold exists for the mixture — the dozens of distinct PFAS compounds that coexist in most contaminated water systems.

Microplastics follow the same pattern. They accumulate. They carry chemical loads that also accumulate. Pharmaceuticals, in contrast, are more likely to be metabolized and excreted — but antibiotic-resistant bacteria they generate in the environment do not clear. The environmental consequences persist even when individual compounds don't.

The practical reality is that the body most Americans are living in today has been accumulating these compounds since birth. PFAS were in widespread industrial use by the 1950s. The CDC has detected PFAS in the blood of 99% of Americans, including newborns.EWG This is not a future risk. It is a present condition.

What the Body Needs That Contaminated Water Undermines

Clean water's role in the body is not passive. Water is the medium of cellular chemistry — the solvent in which enzymes function, the carrier of nutrients and signals, the buffer that maintains pH, the coolant that regulates temperature. But its most critical role, from an energy standpoint, is in maintaining the electrochemical environment that drives mitochondrial function and membrane voltage.

Magnesium is the mineral most directly connected to this process — required as a cofactor for over 300 enzymatic reactions including ATP synthesis, the sodium-potassium pump, and DNA repair. Magnesium is commonly stripped by reverse osmosis filtration and is frequently deficient in populations drinking treated water without remineralization. When the filtration solution removes the contaminant but also removes essential minerals, the remedy introduces its own deficit.

This creates a particular bind for people trying to protect themselves: the most effective filtration for PFAS removal (reverse osmosis) also removes the minerals the body needs for the very cellular processes that PFAS is already impairing. The solution, in isolation, is incomplete. Remineralization after filtration — restoring magnesium, calcium, and trace minerals — is not a marketing claim. It is basic cellular chemistry.

→ Further reading: The Signal in the Water — the full picture of what optimal cellular hydration requires, and the science of structured water

The AI Layer: What Powers This Investigation

This article was researched and written with the assistance of Claude, an AI developed by Anthropic. That fact carries a dimension worth naming directly: the AI tools being used to investigate the water crisis are themselves significant consumers of water — and in some cases, contributors to it.

Every AI query requires cooling. Data center cooling is primarily accomplished through evaporative systems that consume potable water drawn from municipal supplies — the same supplies documented throughout this series as contaminated with PFAS, pharmaceuticals, and microplastics. Researchers at the University of California, Riverside estimate that each 100-word AI prompt uses roughly one bottle of water.EESI Billions of prompts are entered globally every day.

The scale is not marginal. A mid-sized data center consumes as much water as a small town. Larger hyperscale AI facilities require up to 5 million gallons per day.Lincoln Institute More than 160 new AI data centers have been built in areas the World Resources Institute classifies as high water stress in the past three years — a 70% increase from the prior period.Bloomberg In Texas alone, data centers are projected to consume 399 billion gallons of water by 2030 — enough to draw down Lake Mead by more than 16 feet in a year.Lincoln Institute

The PFAS connection is direct and documented. Some specialized liquid cooling systems — marketed as more efficient alternatives to evaporative cooling — use fluorinated cooling fluids. These are PFAS compounds. As one analysis notes, these technologies "have the potential to introduce forever chemicals into the mix."Undark The infrastructure built to power artificial intelligence is, in some implementations, a new source of the same class of chemicals this investigation is documenting.

Most large tech companies draw potable water from municipal systems — the same systems that serve communities. In Loudoun County, Virginia — home to more than 200 data centers — approximately 900 million gallons of potable water were consumed by data centers in 2023 alone.EESI Google resisted disclosing its water use at its Oregon facility for years, eventually paying $100,000 to settle a public records lawsuit. When the data was released, its facility had consumed 355 million gallons in a year — a quarter of the entire city's annual water use.Stanford/And The West

This is not an argument against AI. It is a documentation of a loop that deserves transparency: AI is being used to investigate water quality problems that AI infrastructure is, in part, creating and drawing from. The water being consumed to run these systems is water whose quality and availability are already under documented stress. These facts belong in the same article.

→ Further reading: Solutions & Accountability — corporate disclosure requirements, water-positive pledges, and what accountability looks like in practice

Where This Leaves Us

The science documented in this article is not speculative. The pharmaceutical compounds in treated water are measured and confirmed. The microplastics in human tissue are measured and confirmed. The mitochondrial dysfunction caused by PFAS is demonstrated in human cell studies with specific molecular mechanisms identified. The atmospheric deposition is documented across every continent. The bioelectric disruption — the degradation of membrane function, neurotransmitter signaling, and cellular voltage — follows mechanistically from the contamination that is already confirmed.

What is not yet established is the precise dose-response relationship for chronic low-level exposure across the full range of contaminants simultaneously. The studies that exist largely examine individual compounds. Real-world exposure is to mixtures — and the research that has examined mixtures finds synergistic effects worse than any single compound would predict. The science is not complete. It is complete enough.

A child in Des Moines knows it intuitively. He wrote it down and sent it to his representative. The adults responsible for the water are still working out the regulatory process.