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Catalytic Carbon Core
A solid extruded carbon block, not loose granules, with a tightly controlled micron structure. Every drop is forced through the same fine, uniform channels, so nothing takes a shortcut around the media.
How It's Made
Engineered layer by layer.
Every Oasis Water Technologies filter is built from the inside out. Four purpose-engineered layers, sealed to perform.
02/ 04
Sediment Protection Wrap
A tightly woven medical grade polypropylene wrap, thermobonded into one clean seal with no harmful adhesives.
03/ 04
Catalytic Media Filter
The carbon itself is premium catalytic coconut shell, acid washed and activated to a higher grade, engineered to target chloramines and VOCs as water passes through.
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Double O-Ring Seal
A proprietary double O ring seal, precision fitted to lock out bypass so every drop travels the full filter path.
The Pack Lab
Find the pack for your water.
Every pack starts from the same catalytic-carbon core, then adds targeted media for your water.
1 Sediment Guard
2 Your targeted pack
3 PFOS Ultra
Heavy Metals Defense PackBuilt on our catalytic carbon foundation, the core standard behind every pack. This Stage 2 configuration adds KDF media, a high-purity copper and zinc filtration alloy widely used for heavy metal removal. As water passes through, KDF media reduces dissolved metals such as lead and copper while supporting fine-particle filtration and high, steady flow. It is built for older infrastructure where lead or legacy plumbing may be a concern.
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VOC Guard Max PackCatalytic carbon foundation forms the core standard behind every pack. Formulated for high-efficiency chemical reduction, this pack specializes in neutralizing stubborn chloramines and volatile organic compounds that conventional carbon often misses. It is ideal for city water systems treated with disinfectants.
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Lead Barrier Pro PackCatalytic carbon foundation, the core standard behind every pack. Enhanced with advanced lead-capturing media, this configuration focuses on fine-particle filtration and heavy metal reduction while maintaining high flow performance. It is designed for older infrastructure where lead or legacy plumbing may be a concern.
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How to read this page
Three words.
Zero blur.
Most brands blur "certified materials" into "certified product." We sort every claim into one of three columns, so you always know which is which.
Certified
Listed in the NSF Official Listing. Independently audited, authorized to bear the NSF Mark, and verifiable by anyone on nsf.org.
Lab tested
Each filter tested on its own at NSF Laboratories, to the full NSF/ANSI protocol. Performance certification is granted to complete systems, and that's our next step, already underway.
In progress
Certification work that is underway. When it is complete, the result posts here first, and the card moves columns.
Tap a column to see the results
Certified
Material safety
NSF/ANSI 42 · Drinking water treatment units
7Cartridges certified
Every one of these cartridges is certified as a component for material safety: nothing in the build leaches into your water.
- CTO Guard
- Nexxus Heavy Metals Defense
- Nexxus Lead Barrier Pro
- Nexxus PFOS Ultra
- Nexxus VOC Guard Max
- Stream Heavy Metals Defense
- Stream VOC Guard Max
Tested and certified by NSF International against NSF/ANSI Standard 42 for material requirements only and NSF/ANSI/CAN 372.
Low lead content
NSF/ANSI/CAN 372 · Lead-free materials
Our filter components meet "lead-free" content limits under the U.S. Safe Drinking Water Act and California, Vermont, Maryland and Louisiana law.
CTO Guard · Chlorine reduction
NSF/ANSI 42 · Aesthetic effects
Chlorine is what makes tap water taste and smell like a pool. CTO Guard is certified to reduce it.
Lab tested at NSF Laboratories
Lead Barrier Pro · Lead at pH 6.5
NSF/ANSI 53 protocol · Health effects
99.4%
Lead enters homes through old service lines and solder. We fed this cartridge water spiked to about 150 µg/L of lead, then kept going to twice its rated life.
- Dissolved lead
- Soft water, pH 6.5
- Every sample under 5 µg/L
Lead Barrier Pro · Lead at pH 8.5
NSF/ANSI 53 protocol · Health effects
99.3%
NSF/ANSI 53 only grants a lead claim when a filter passes at both pH 6.5 and pH 8.5. This harder, alkaline test water also carries particulate lead, including fine particles down to 0.1 micron, the kind that flakes off old pipes. Passed both.
- Particulate lead
- Fine particles 0.1 to 1.2 µm
- Hard water, pH 8.5
- Both pH tests passed
Lead Barrier Pro · Particulate, Class IV
NSF/ANSI 42 protocol · Aesthetic effects
>99.9%
Sediment, rust and grit make water cloudy and wear out fixtures. About 13,000 particles per mL went in. None were detected coming out.
- Class IV: 15 to under 30 microns
- Finer than a human hair
- Fine silt
- Rust flakes
- Pipe scale
- Water main break debris
- Aerator-clogging grit
Per NSF/ANSI 42, particulate ratings carry no gallon capacity.
Full reportVOC Guard Max · Chlorine, taste & odor
NSF/ANSI 42 protocol · Aesthetic effects
- Chlorine
- Taste
- Odor
- Minimum service flow: pass
96.6%
Chlorine in at about 2.0 mg/L. At most 0.16 mg/L out, across the full rated capacity. Plus a minimum service flow pass, so filtered water does not mean a weak tap.
Full reportIn progress
In progress
Full-system certification
NSF/ANSI 53 · Health effects
TargetQ1 2027
Contaminant-reduction certification for our finished systems is underway. This card moves to Certified the day it lands.
In progress
PFOS Ultra · PFOS/PFOA
NSF/ANSI 53 · Health effects
Target · End of yearQ4 2026
Every filter pack includes PFOS Ultra, engineered to reduce PFOS/PFOA based on our internal testing. Independent certification is in progress, and we will post it here the moment it is complete.
Want to dig deeper?
If anything about our NSF listing, certifications or lab reports is unclear, ask us. A real person will walk you through it.
The Grid · Facts, not fear
See what is in
your water.
Proof is only half of it. Enter your ZIP on our contamination map and see what your utility has reported, matched to the filter pack built for it.