Green Cleaning as a Science>>>

By INDEX Editorial Team | Based on peer-reviewed research –

A practical, evidence-informed guide to choosing cleaning methods and products that remove dirt while considering indoor air, health, and environmental impact.

A cleaning product label can make a product sound reassuring—but words such as green, natural, and eco-friendly do not, by themselves, explain how well it cleans, what it releases into the air, or how its ingredients behave after use.

A more useful approach is to treat green cleaning as a set of practical questions. What needs to be cleaned? Is cleaning enough, or is disinfection actually needed? Does the product disclose meaningful information about its ingredients and use? Can you reduce unnecessary exposure while still getting the job done?

That is green cleaning as a science: matching the cleaning task with an effective method and considering the product, the way it is applied, the surface, and the people doing the cleaning. It does not mean that every conventional cleaner is harmful or every product marketed as green is automatically a better choice. It means evaluating specific criteria rather than relying on reassuring language alone.

This article is part of INDEX’s Indoor Air Quality hub. It is written primarily for household consumers, with guidance that may also be useful to professional cleaners and facility teams. INDEX is a 501(c)(3) nonprofit; our Science-to-Solution methodology connects research with practical pathways, not product endorsements.

Start with the cleaning task—not the bottle

Cleaning is not one single job. Removing grease from a stovetop, lifting dust from a shelf, sanitizing a food-contact surface, and disinfecting a high-touch surface are different tasks. Each may call for a different method.

For ordinary soil, dirt, and grease, a suitable cleaner and physical action—such as wiping or scrubbing—may be enough. Cleaning, sanitizing, and disinfecting are not interchangeable terms. A disinfectant is intended to inactivate specified microorganisms when used according to its label. It is not automatically necessary for every surface or routine cleaning task.

The U.S. Environmental Protection Agency (EPA) advises limiting disinfectant use to areas where people are likely to contact contaminated surfaces and notes that many general-purpose tasks do not typically require disinfection. If a disinfectant is needed, choose a product registered for the intended use and follow the label directions, including required contact time. EPA guidance on greener cleaning products

A task-first approach can make cleaning more efficient, too: use the mildest suitable method, apply only the amount needed, and reserve specialized products for jobs that call for them.

An eight-point framework for evaluating green cleaning

There is no single ingredient or marketing phrase that defines a “green” cleaner. Consider these eight criteria together.

1. A clear purpose and surface match

The label should make it reasonably clear what the product is for and where it can be used. A degreaser may suit oily kitchen soil but not every floor, countertop, or finished surface. Follow the directions for the material you are cleaning, and test an inconspicuous area when the manufacturer advises it.

A product that is not compatible with a surface can damage it or leave residue, creating more work and potentially requiring another cleaning step.

2. Transparent product information

Look for accessible ingredient information, directions, safety precautions, and—where relevant—a safety data sheet. Ingredient disclosure helps consumers and cleaning professionals make informed decisions, especially when fragrance sensitivity, skin irritation, or workplace handling is a concern.

A long ingredient list is not automatically a sign that a product is unsafe, and a short list does not guarantee that it is suitable for every user or task. Context matters: the ingredient, its concentration, exposure route, and how the product is used all shape the practical picture.

3. A credible standard or certification

Broad claims such as “eco-safe” or “environmentally friendly” are hard to assess without specifics. Independent standards can help narrow the search because they define criteria and offer a way to identify products that have been reviewed against them.

EPA’s Safer Choice program identifies products with ingredients that meet its human-health and environmental criteria. EPA maintains a searchable database so consumers and organizations can check which products currently meet the standard. Certification is a useful screening tool—not a promise that a product is risk-free or the best match for every task. EPA Safer Choice Search Safer Choice products

Check the certification itself and the product’s current status. A logo or claim on packaging should not substitute for verifying it against the program’s official listing.

4. Fragrance information

“Clean” does not need to mean strongly scented. Fragrance can contribute to a product’s volatile emissions, and some people prefer fragrance-free products because of sensitivity or personal preference. “Unscented” and “fragrance-free” may not mean the same thing in every product context, so check the label and the certification criteria where available.

Avoid assuming that a citrus or herbal scent is safer simply because it smells familiar. Scent alone does not tell you what is in a formula or how it performs.

5. A considered approach to VOCs and indoor air

Volatile organic compounds (VOCs) are a broad group of chemicals that can enter indoor air from a range of products and sources. Cleaning can affect indoor air through product emissions, the way products are applied, and interactions with residues on surfaces. EPA identifies VOC content as one environmental consideration for cleaning products. EPA greener-cleaning criteria

An important distinction: the word VOC does not, by itself, tell you how hazardous a specific substance is at a particular exposure level. Nor does “low VOC” establish that a product is risk-free. A useful product comparison considers the product’s stated claims, its use instructions, ventilation, and whether a lower-emission or fragrance-free option can do the same job.

6. A practical application method

How a cleaner is applied affects exposure. Sprays can disperse droplets into the air; when suitable for the task, applying the product to a cloth rather than spraying broadly may help reduce airborne spread. Use adequate ventilation and follow label precautions, especially for concentrates.

Do not mix cleaning products. In particular, never mix bleach with ammonia or acids. Read labels before combining products, and keep cleaning solutions in their original, labeled containers.

7. Environmental considerations beyond ingredients

A product’s environmental profile includes more than whether an ingredient comes from plants. EPA lists considerations such as biodegradability, aquatic toxicity, pH, packaging, concentrate formats, and clear use and disposal instructions. For example, concentrated products may reduce packaging when diluted as directed, but they also need appropriate handling and storage. EPA’s product considerations

“Plant-derived” describes a source, not a complete assessment of health, environmental impact, or performance. Evaluate the whole product and use pattern rather than treating one attribute as a guarantee.

8. Performance for the real job

A product is only a practical option if it works for the soil and surface in question when used according to its directions. Performance can depend on dwell time, dilution, water temperature, wiping materials, and the amount of physical effort required.

A product that requires repeated applications, excessive scrubbing, or unnecessary rinsing may not be a sensible choice for that task. Conversely, a more targeted cleaner can be appropriate when ordinary cleaning does not remove the soil.

What the research can—and cannot—tell us

Cleaning can affect indoor air, but the evidence does not support a simple story in which all “green” products are harmless and all other products are dangerous.

In a peer-reviewed 2023 study, researchers analyzed emissions from 30 cleaning products and detected hundreds of different VOCs. The study found that, on average, products labeled green emitted fewer VOCs than conventional products in the sample; fragrance-free green products emitted fewer again. The findings concern the tested products and their formulations at the time of purchase—they do not prove that every green-labeled product has the same emissions or that the label itself guarantees a particular outcome. The study, published in Chemosphere

A separate 2025 study monitored cleaning in two occupied homes and observed changes in indoor VOC and semivolatile organic compound concentrations during and after cleaning. The researchers reported that some increases persisted for hours, and in one carpet-cleaning event a compound remained elevated for days. The authors also emphasized the complexity of interpreting the results: changes were not always clearly attributable to a product’s direct emissions, the study involved only two homes, and the health implications of many measured compounds were unclear. Sweet et al., Environmental Science & Technology

Together, these studies support a measured conclusion: product choice and cleaning practice can influence indoor exposures, but labels and single measurements do not tell the whole story. That is why criteria—such as fragrance information, ventilation, application method, task fit, and current certification status—are more useful than a broad “green” claim.

A practical green-cleaning routine

You do not need to replace every product at once. Start with the cleaning tasks you do most often, then make gradual, evidence-informed changes.

• Identify the soil and surface. Dust, food residue, soap film, and grease may need different methods.
• Decide whether you need a cleaner or a disinfectant. Do not use a disinfectant automatically for routine cleaning.
• Compare products using the criteria above. Look for task-specific directions, clear information, and a credible certification where available.
• Consider fragrance and application. If reducing scent or airborne spread is a priority, look for fragrance information and avoid unnecessary broad spraying.
• Use the product as directed. Measure concentrates carefully and follow any surface, dilution, contact-time, and protective-equipment instructions.
• Ventilate when practical. Open windows or use appropriate exhaust ventilation if conditions allow.
• Store products safely. Keep containers labeled and away from children, pets, food, and incompatible materials.
• Reassess rather than overbuy. Keep products that suit recurring needs, and avoid adding specialty products without a clear purpose.

For professional cleaners and facility teams, the same principles can be translated into written procedures: match products to tasks, train staff on dilution and handling, maintain current product information, and avoid mixing incompatible chemicals. A thoughtful system is more reliable than asking workers to infer safe use from a “green” label.

Practical options that meet these criteria include…

Once you have defined the task and decided what matters for your situation, compare products against those criteria. For an all-purpose cleaner or degreaser, review the stated surfaces, dilution directions, ingredient information, fragrance claims, certifications, and safety data before deciding whether it is suitable.

Green cleaning is not about finding a perfect bottle. It is about making informed choices: use the right method for the task, look beyond vague claims, and consider how the product is applied as well as what its label says.

INDEX’s work is grounded in our 501(c)(3) mission, peer-reviewed research in the Science Center, and our Science-to-Solution methodology. This article is educational and is not medical or occupational safety advice.