AquaTru vs Berkey: Two Very Different Approaches to Clean Water

The AquaTru uses reverse osmosis. The Berkey uses gravity-fed carbon filtration. They're both popular countertop water purifiers, but they work completely differently, remove different things, and suit different households. Here's an honest comparison.

The core difference

RO removes dissolved solids. Gravity carbon does not.

AquaTru's reverse osmosis removes fluoride, nitrates, arsenic, PFAS, and dissolved heavy metals that Berkey's carbon filters cannot touch. Berkey excels at removing bacteria, sediment, and chlorine — without electricity, without waste water, and with a much larger reservoir.

Feature	AquaTru	Competitor
Filtration method	Reverse osmosis (4-stage)	Gravity carbon (Black Berkey elements)
NSF certified	Yes — 5 standards via IAPMO	No — not NSF certified
Removes fluoride	Yes — 93%+ reduction	Partially (requires add-on PF-2 filters)
Removes PFAS	Yes — NSF P473 certified	Claimed but not certified
Removes nitrates	Yes	No
Removes arsenic	Yes — 97%+	Partially
Removes bacteria	Yes (via membrane)	Yes (Black Berkey elements)
Requires electricity	Yes — 120V outlet	No
Water waste	~0.6 gallons per gallon purified	None
Capacity	0.75 gallons (Classic)	2.25–6 gallons depending on model
Speed	Fast (electric pump)	Slow (gravity-fed — 1–4 hrs to fill)
Price (approx.)	$350–$449	$250–$500+ depending on size
Annual filter cost	$100–$120	$50–$100

When AquaTru is the better choice

You have concerns about PFAS, fluoride, nitrates, or arsenic specifically
You want independently certified filtration (NSF) — not marketing claims
You want fast on-demand water dispensing
You have city/municipal tap water (chloramine, PFAS, lead risk)

When Berkey is the better choice

You want water filtration with no electricity — off-grid, camping, or emergency prep
You need to filter large volumes (6-gallon Berkey beats AquaTru's 0.75-gallon tank)
You primarily want to remove bacteria, sediment, and chlorine taste
You prefer a gravity system with no waste water output
You're filtering well water or lake water (Berkey handles turbidity and bacteria better)

The NSF certification gap

This is the most important thing to understand about Berkey. The company has declined to pursue NSF certification for their filters, meaning their contaminant removal claims are not independently verified. AquaTru's claims are certified by IAPMO to NSF standards — a meaningful difference if you're relying on your filter for genuine health protection rather than taste improvement.

Our recommendation

For city water with PFAS, lead, or fluoride concerns — choose AquaTru. For off-grid use, emergency preparedness, or very high daily volume — Berkey makes more sense. They're solving different problems.

AquaTru Classic on Amazon →