Nalgene · Portable Water Bottles
Nalgene Og Water Bottle With Filter, Removes 99.99% Tap Water
Low risk, though the brand is silent on filter media PFAS content.
Tritan plastic and activated carbon represent lower-PFAS material choices. The brand does not publicly disclose filter media composition details.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Activated carbon filter, Tritan plastic bottle
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What Nalgene Og Water Bottle With Filter is made of, ingredients and materials
The bottle is Tritan copolyester, a BPA-free plastic designed for durability and temperature resistance. The filter cartridge uses activated carbon, which adsorbs chlorine, taste, odor, and some organic compounds through physical absorption into its porous structure. Tritan has no known leaching of endocrine disruptors under normal use, and activated carbon does not release harmful compounds into water when functioning correctly.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Bacterial growth and biofilm in filter housing
Activated carbon filters create a moist environment conducive to microbial colonization if not maintained properly. This risk increases if the cartridge is not replaced on schedule or if water sits stagnant inside the bottle.
Activated carbon dust and fines in drinking water
New or damaged cartridges can shed fine carbon particles into the filtered water. Pre-rinsing a new cartridge before first use reduces this risk but does not eliminate it entirely.
Filter efficacy degradation over time
Activated carbon becomes saturated and loses adsorption capacity with use. The brand's 40-gallon replacement guideline is conservative; actual performance may degrade sooner in high-chlorine or high-sediment water supplies, compromising the 99.99% claim.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Leachables from filter housing plastic or adhesives
No public reports of leaching from Nalgene filter housing material or cartridge adhesives. Housing material composition is not clearly disclosed, but no established safety concerns exist for this product line.
Tritan plastic stability under repeated thermal stress
Tritan is stable under normal use. No known leaching of BPA analogs or other endocrine disruptors at drinking water temperatures. Repeated boiling or dishwasher cycling (high heat) may shorten lifespan but poses no documented chemical hazard.
The full breakdown
The brand's record and disclosure
Nalgene (now owned by Essentials) has a solid reputation for durable reusable bottles and shifted to BPA-free Tritan in the early 2010s after the BPA controversy. The company does not publicly disclose PFAS testing or removal claims for its filter cartridges, which is typical for consumer-grade brands in this segment. No major recalls or contamination incidents are on record for this specific filter model.
How it compares in its category
This product sits in the mid-tier consumer segment. It removes chlorine and improves taste better than pitcher filters but does not address heavy metals, fluoride, or bacteria as comprehensively as more expensive multi-stage or reverse-osmosis systems. The 99.99% claim refers to chlorine reduction and sediment filtration, not all contaminant classes.
If you buy it
Replace the cartridge every 40 gallons or two months, whichever comes first; exhausted carbon becomes a breeding ground for bacteria and biofilm. Rinse the filter housing with hot water before installing a new cartridge. Do not leave standing water in the bottle for extended periods, especially in warm temperatures. The Tritan bottle itself tolerates hot water (up to 100 degrees C) but the filter cartridge should only contact room-temperature or cold water.
What we don’t know
- Basis
- Model estimate, 68% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Nalgene has made none
Formulations change between production runs, so check the current label. How we grade.
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More portable water bottles grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.