When most people think about water contamination, they think of chemicals, heavy metals, or chlorine. But some of the most persistent and overlooked contaminants in drinking water are biological organisms known as cysts.
These microscopic threats can exist even in clear, treated water — and understanding them is key to protecting your health and hydration.
At Natural Action, we believe water should be both clean and alive, which is why our under-sink filtration and revitalization solutions are designed to work together — and even integrate with systems you may already own.
What Are Cysts in Water?
Cysts are the protective, dormant form of certain parasites. In this state, they are surrounded by a tough outer shell that allows them to survive harsh environments — including standard chlorine disinfection used in many municipal water systems.
The Most Common Waterborne Cysts
Giardia
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Causes giardiasis
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One of the most common waterborne illnesses worldwide
Cryptosporidium
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Causes cryptosporidiosis
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Highly resistant to chlorine
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Responsible for many drinking-water outbreaks
These cysts can enter water supplies through:
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Agricultural runoff
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Sewage contamination
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Flooding and infrastructure failures
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Untreated or poorly treated water sources
Because cysts are microscopic, water can look clean and still contain them.
Health Effects of Cysts in Drinking Water
When cysts are ingested, they can cause intestinal infections that disrupt digestion and hydration.
Common Symptoms
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Diarrhea
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Stomach cramps
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Nausea
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Fatigue
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Dehydration
Those Most at Risk
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Children
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Elderly individuals
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Pregnant women
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Immunocompromised individuals
Symptoms may appear days or even weeks after exposure, making the source difficult to trace.
Why Many Water Systems Don’t Fully Remove Cysts
Municipal treatment systems are designed to serve millions of people and do an important job — but chlorine alone does not reliably neutralize all cysts, especially Cryptosporidium.
That’s why boil-water advisories are still issued after contamination events.
Boiling works — but it’s not realistic for everyday life.
Point-of-use filtration provides an extra layer of protection where it matters most: your kitchen tap.
Natural Action’s Under-Sink Filtration Solution
Natural Action’s under-sink filtration systems are engineered to help physically reduce cysts and other contaminants through MultiPure filtration before the water reaches your glass.
Key Benefits
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Fine filtration designed to reduce cysts
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Improved taste, clarity, and odor
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Reduced sediment and biological contaminants
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Clean water for drinking, cooking, and food prep
This stage focuses on removal — eliminating what does not belong in your water.
Already Using RO or Another Filter? You’re Covered.
Many Natural Action customers already use reverse osmosis (RO) or other filtration systems — and that’s perfectly fine.
Our under-sink revitalizer is designed to work with your existing system, not compete with it.
Why This Matters
RO and other filters are excellent at cleaning water — but many people notice the water can feel flat or lifeless afterward.
Adding the Natural Action revitalizer:
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Installs after your filtration or RO system
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Helps restore natural structure and flow
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Improves mouthfeel and hydration experience
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Requires no electricity, chemicals, or maintenance
What Is Structured (Revitalized) Water?
In nature, water constantly moves — flowing over rocks, through streams, and across mineral-rich environments. This natural movement creates structure.
Structured water is designed to mimic these natural patterns, helping water interact more efficiently with the body.
Benefits
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Smoother taste
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Improved hydration efficiency
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Better mineral interaction
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A more refreshing drinking experience
While filtration removes what shouldn’t be in water, revitalization focuses on how water supports the body.
Why the Combo Works Best: Clean + Revitalized
Using filtration alone cleans water.
Using revitalization alone doesn’t remove contaminants.
Together, they create a complete solution:
✔ Reduces cysts and unwanted substances
✔ Works with RO and other filtration systems
✔ Improves taste and hydration
✔ No chemicals or electricity
✔ Convenient under-sink installation
This approach reflects the Natural Action philosophy:
Remove what doesn’t belong. Restore what nature intended.
Final Thoughts
Cysts in water are invisible, resilient, and potentially harmful — but with the right system, they are manageable.
By combining advanced under-sink filtration with a Natural Action revitalizer, you can enjoy water that is not only cleaner, but more vibrant and supportive of everyday wellness.
