Brondell · Countertop Filters
Brondell Cypress Carbon Block Filter HF-33
Lower concern. Carbon block filters are unlikely PFAS sources.
Activated carbon block is an inherently PFAS-free filtration material. Brondell makes no PFAS claims but discloses no hazardous coatings on this cartridge.
Shop Brondell on Amazon →Material
activated carbon block
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
The Cypress HF-33 uses an activated carbon block as its core filter medium. Carbon blocks are formed by compressing powdered activated carbon with a binder (typically cellulose or coconut-derived materials) into a solid structure. This design traps contaminants through adsorption and mechanical filtration. Carbon blocks are chemically inert once manufactured and do not leach into water under normal use conditions.
The brand's record and disclosure
Brondell is a smaller filtration brand with limited public safety documentation or third-party certifications readily available for this model. The company does not appear to have published detailed material safety data or contamination testing results for the HF-33. No major recalls or safety controversies are on record for this product line. Absence of disclosure is not evidence of a hazard, but transparency is limited.
How it compares in its category
Activated carbon block filters are the standard countertop choice and generally pose lower contamination risk than granular carbon filters (which can shed particles). Competitors like Aqua-Pure and Culligan use similar carbon block technology. The HF-33 sits in the mid-range for filtering claims and certification; it lacks NSF or WQA certification marks, which mainstream brands often pursue. Cost and simplicity favor it over some pitcher filters, but not over certified pitcher filters from established brands.
If you buy it
Replace the filter every 100 gallons or 2-3 months, depending on source water quality and household use; clogged filters reduce flow and filtering efficacy. Do not exceed typical cold-water use temperatures (the housing should not contact boiling water). Store in a cool, dry place before installation. If water flow drops sharply or taste/odor worsens despite recent replacement, the filter may be saturated or housing integrity compromised; discontinue use and replace.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Bacterial growth in housing/filter chamber
Countertop filter housings can harbor bacteria if not rinsed regularly or if water stagnates between uses. The HF-33 housing material and internal design specifics are not detailed in public documentation, limiting assessment. Users should empty the housing weekly and sanitize if unused for extended periods.
Carbon fines or particle shedding
Activated carbon block filters are designed to minimize particle release compared to granular carbon. No documented complaints or recall history suggests the HF-33 sheds carbon fines, but early use may produce slight discoloration (typically harmless).
Housing material leachables
The plastic housing composition is not disclosed by Brondell for this model. Assuming standard food-grade or potable-water approved plastics, leaching risk is low at room temperature. However, lack of material specification is a transparency gap.
Saturation without visual cue
The HF-33 lacks a filter life indicator light or color-change cartridge. Once saturated, the filter cannot adsorb new contaminants but appears visually intact, creating a false sense of protection if users exceed recommended replacement intervals.
Microbial contamination if poorly maintained
If the filter is not replaced on schedule and water flow slows, stagnant water in the housing becomes a vector for bacterial growth. Regular replacement and housing rinses mitigate this risk significantly.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Countertop Filters
ZeroWater
40-Cup Glass Water Filter Dispenser
borosilicate glass, plastic pitcher housing, ion-exchange resin cartridge
Lower concern on PFAS, but brand silence on cartridge composition is a missed transparency opportunity.
✓Bare metal or glass, no coating at all
ZeroWater
Culligan ZeroWater Technology 22-Cup Ready Water Filtration Dispenser
Plastic housing, activated carbon + ion-exchange resin filter media
Lower concern, but verify filter cartridge specs before relying on PFAS claims.
✓Brand claims PFAS-free (unverified)
LARQ
PureVis Pitcher
Borosilicate glass pitcher, activated carbon filter cartridge
Lower PFAS concern for the pitcher itself; verify filter cartridge sourcing if purchasing replacements.
✓Bare metal or glass, no coating at all
More countertop filters 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.