Zojirushi NHS-06 Rice Cooker/Steamer
Medium-high risk; stainless steel construction but Zojirushi offers no PFAS disclosure.
The NHS-06 features a stainless steel cooking vessel and exterior with no advertised nonstick surface, suggesting lower inherent PFAS risk. Zojirushi provides no public statement on PFAS testing or material sourcing.
The better-graded swap
Zojirushi
Zojirushi Neuro Fuzzy Rice Cooker & Warmer
75/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Stainless steel inner pot and exterior; no nonstick coating disclosed
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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.
Stainless steel corrosion and rust formation
Over years of water contact and mineral exposure, microscopic corrosion pits can develop in stainless steel, potentially releasing trace iron and nickel. The NHS-06 has no reported systematic rust issue, but rice cookers operated in hard-water regions or with infrequent cleaning may experience accelerated corrosion.
Rubber gasket and seal degradation
Silicone or rubber gaskets in the lid mechanism can degrade, swell, or develop odor after prolonged heat cycling. No specific NHS-06 gasket failure epidemic is documented, but this is a known wear point in closed rice cookers; replacement gaskets are widely available and recommended every 3-5 years.
Bacterial or mold growth in lid chamber
If the lid gasket fails or the cooker is stored with residual moisture, the enclosed steam chamber can harbor mold or biofilm. This is not unique to Zojirushi but is a structural risk in sealed cookers; regular drying and gasket inspection mitigate the risk.
Hexavalent chromium release from stainless steel under extreme conditions
Stainless steel alloys contain chromium; under very high temperature or acidic conditions, trace hexavalent chromium can theoretically form. Rice cooking does not reach these extremes, but prolonged storage of acidic foods in the cooker's pot is not a typical use case and should be avoided.
What’s reassuring
Bare uncoated material
Recorded as a bare, uncoated material with no surface coating or treatment.
Lead
The NHS-06 is described as stainless steel with no enamel or decorative glaze disclosed; thus lead or cadmium in ceramic finishes is not a identified concern for this model. If any interior coating is present but undisclosed, testing would be needed to rule out old formulations.
Source, ATSDR ↗The full breakdown
What it's made of and why it matters
The NHS-06 uses a stainless steel inner pot and exterior housing, which eliminates risks from Teflon-type coating nonstick coatings that can degrade and release fumes at high temperatures. Stainless steel does not leach significant quantities of aluminum or other metals under normal rice-cooking conditions (typically 100, 212°F). The absence of ceramic or enamel glazes removes concerns about lead or cadmium in decorative coatings. The heating element and internal connections are the primary components to monitor for durability.
The brand's record and disclosure
Zojirushi is a Japanese appliance manufacturer with a reputation for durability and engineering but has not published detailed material safety data sheets or PFAS testing results for consumer access. The company does not advertise independent certifications (e.g., NSF, GREENGUARD) for this model. No major product recalls related to chemical leaching or coating failure have been publicly documented for the NHS-06 line, though this absence of reports does not confirm absence of risk. The brand's silence on water-contact materials and seal composition raises questions about transparency.
How it compares in its category
Rice cookers with stainless steel inner pots have lower concern within the category; many competitors use aluminum, non-stick coatings, or enamel-lined steel, each carrying distinct hazards. The NHS-06 avoids the most acute chemical leaching risks present in budget models with degradable nonstick surfaces. However, Zojirushi does not distinguish itself with public third-party testing or PFAS disclosure, placing it at parity with many mid-range brands in terms of verifiable safety communication. Premium brands (e.g., some Japanese domestic-market models) and newer eco-certified cookers may offer greater material transparency.
If you buy it
Operate the cooker within manufacturer temperature guidelines and avoid prolonged boiling or high-heat settings that could stress stainless steel seals or gaskets over time. Inspect the rubber gasket and seals annually for cracks, discoloration, or odor; replace if degraded, as failed seals can allow mold or bacterial growth in the lid chamber. Clean the inner pot with non-abrasive sponges to avoid scratching any protective oxide layer. If the cooker develops rust spots on stainless surfaces, corrosion may indicate compromise of the material; consider replacement after 5, 10 years of regular use.
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Zojirushi has made none
Formulations change between production runs, so check the current label. How we grade.
More rice cookers 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.