Which Home Products Should Have an NSF Certification?

When it comes to the products we use in our homes, safety and performance aren’t always guaranteed by marketing claims alone. That’s where NSF certification comes in.

As a trusted, third-party verification, NSF ensures that home products meet rigorous standards for contaminant reduction and overall quality, giving you confidence that the items you rely on every day are truly safe and effective.

Understanding NSF certification can help you make informed choices and protect your family’s health

An NSF Certification is a globally recognized third-party verification process that confirms a product meets strict standards for safety, quality, and performance. It’s administered by NSF International, an independent, nonprofit organization that develops public health standards and tests home products.

When a product is NSF certified, it has been:

• Tested by an independent laboratory to verify safety and performance

• Reviewed for ingredient accuracy and labeling claims

• Manufactured in a facility that meets quality and safety standards

All approved NSF certifications go through ongoing monitoring and retesting, not just a one-time review, to ensure safety and compliance.

An NSF certification doesn’t guarantee perfection, but it does provide science-based assurance that a product does what it claims to do.

NSF certification is one of the most trusted indicators of product safety and quality, particularly in categories where government oversight is limited or inconsistent. We recommend ensuring these everyday home products are NSF-certified.

NSF certification provides third-party verification that a drinking water product actually removes the contaminants it claims—whether that’s lead, chlorine, PFAS, or other harmful substances—at the levels stated and throughout the product’s lifespan.

Without NSF certification, claims like “removes 99% of lead” or “reduces chlorine taste and odor” are often based on internal testing or marketing promises rather than standardized, science-backed evaluation and cannot be trusted.

For anyone relying on a water filter to protect their family’s health, NSF certification is the only reliable way to verify that contaminant-removal claims are accurate and trustworthy.

• Water filters (pitchers, under-sink, whole-house, shower)

• Refrigerator water filters

• Reverse osmosis systems

• Bottled water (commercial and office-use)

The risks of heavy metals and chemical leaching from kitchen appliances and surfaces are often overlooked. Many kitchen appliances contain metal components or plastic parts that can, over time, release small amounts of lead, cadmium, BPA, or other harmful chemicals into food and beverages, especially when heated or exposed to acidic ingredients.

Using NSF-certified appliances and surfaces ensures that materials are tested for safe chemical leaching, giving consumers confidence that their kitchen tools won’t introduce unintended contaminants into their food or water.

• Coffee makers and espresso machines

• Ice makers

• Food prep surfaces and cutting boards

• Dishwashers and internal water components

NSF certification ensures that faucets, pipes, and showerheads are tested to reduce exposure to lead, PFAS, and harmful microbes. These contaminants can leach into water from materials, posing serious health risks over time.

NSF-certified fixtures give homeowners confidence that their plumbing delivers clean water and minimizes long-term exposure to toxins and pathogens.

• Faucets and faucet filters

• Pipes and fittings

• Showerheads

You might think this category falls under FDA approval. The FDA primarily ensures that the materials used in containers (plastics, metals, or coatings) won’t release harmful substances under normal use. However, the FDA does not test individual products for performance, durability, or actual contaminant reduction.

NSF certification goes further, verifying that a food storage product uses safe materials AND meets strict standards for cleanability, chemical leaching, and performance under real-world conditions.

• Reusable food containers

• Water bottles

• Baby bottles and sippy cups

• Food service-grade kitchenware

Have you considered the cleaning products you use on your kitchen counters? After a quick spray and wipe, is the lasting residue safe to prep food on?

Unlike products that simply claim to be “food-safe” or “non-toxic,” NSF-certified cleaners are verified to effectively eliminate harmful microbes without leaving unsafe chemical residues. NSF-certified cleaning products won’t contaminate surfaces or compromise the safety of the food they touch.

• Commercial-grade cleaners

• Sanitizers and disinfectants

• Products marketed for schools or healthcare settings

Children are more vulnerable to contaminants because their bodies are still developing, making it difficult for them to process and eliminate toxins. They also consume more food, water, and air per unit of body weight than adults do, which increases the impact of toxins. Products intended for children benefit greatly from NSF certification, which helps ensure safety and reduce risk.

• Formula prep appliances

• Bottle sterilizers

• Products that come into contact with drinking water

Mold, bacteria, and water quality concerns in HVAC systems and humidifiers are a health risk if these devices aren’t properly maintained. Stagnant water, cooling coils, and poorly designed reservoirs can become breeding grounds for mold and bacteria, which can then be dispersed into the air and inhaled by anyone in the home.

NSF-certified air-related products are tested to ensure that materials resist microbial growth, minimize contaminant leaching, and maintain water quality, protecting indoor air and overall household health.

• Humidifiers and water reservoirs

• Whole-home water-connected systems

NSF certification is strongly recommended for dietary supplements, as they are not reviewed or approved by the FDA before reaching the market. NSF tests for heavy metals, bacteria, yeast, mold, pesticides, and harmful substances in supplements.

It’s actually easier than you think! Here are some ways you can verify if a home product has an NSF certification:

• Look for the NSF mark on the product or packaging.

• Check the NSF online product database.

One thing to keep in mind as you search: NSF certification verifies that a product meets standards for specific contaminants, not all possible chemicals. For example, a water filter might be certified to reduce chlorine but not tested for lead or PFAS. If you’re concerned about a particular substance, always check exactly which contaminants the product is certified to handle.

NSF certification is a powerful decision-making tool for healthy and safe home products. Even small swaps can reduce long-term exposure to contaminants that affect your health.

Make it a goal to review the NSF database and make one swap a month. You’ll be surprised how easy these swaps are to make, and you’ll feel more confident that you’re making non-toxic choices for your home. Prioritize verified safety over marketing buzzwords. 

The Weddell Duo is NSF certified for chlorine reduction and independently verified by an accredited third-party laboratory to reduce PFAS and particulates. Make a shower filter your first NSF-certified home product!

Getting NSF certified can be challenging. Manufacturers must undergo:

• Rigorous testing

• Reviews of product formulation and labeling

• Inspections of manufacturing facilities

• Ongoing monitoring to ensure compliance with the specific NSF/ANSI standard they are targeting.

The product must consistently meet the performance, safety, and quality criteria set out in that standard before NSF will grant certification.

Many products undergo annual laboratory retesting to ensure continued performance and compliance. If a product fails ongoing testing or isn’t responsive to required reviews, NSF can withdraw certification or recall the product.

No. NSF certification is not generally required by law for consumer products. It is a voluntary third-party certification that products meet specific health and safety standards.

Yes, a product can still be safe without NSF certification. NSF certification provides third-party verification of performance and safety claims, which can build greater consumer confidence than unverified claims.