Eco Labels Explained: ENERGY STAR, FSC, GREENGUARD, OEKO-TEX

An eco label is a claim about one thing. ENERGY STAR is about energy efficiency, WaterSense about water, FSC about where wood and paper come from, UL GREENGUARD about what a product emits into indoor air, and OEKO-TEX and GOTS about textiles. A label is only useful when it matches the claim you are trying to check, so this guide explains what each common label certifies, what it leaves out and how to tell a real certification from a decorative leaf. Use the eco label decoder to filter the labels by product type. Labels are one part of planning sustainable home upgrades.

How to read an eco label

Ask four questions of any label: who issues it, what attribute does it test, where is the standard published, and is this exact product covered? The issuer can be a government agency (ENERGY STAR and WaterSense are run by the U.S. EPA), a third-party certifier such as UL Solutions or the Forest Stewardship Council, or the law itself, as with TSCA Title VI. The label owner’s own criteria page answers the other questions, and a label whose owner publishes no criteria deserves doubt.

Read the label as a narrow statement. It says nothing about attributes it does not test. An FSC-certified oak table has been sourced from verified forests, but the finish on it is a different question. A GREENGUARD-certified sofa has met emission limits, but that is not a statement about recycled content or energy use.

Eco labels by product type

Energy and water: ENERGY STAR and WaterSense

ENERGY STAR is the government-backed symbol for energy efficiency, administered by the U.S. EPA. A bulb, for example, must meet the published lamp specification, including minimum lumens for the old wattage it replaces and minimum lumens per watt. The saving that follows is arithmetic, which our LED and appliance savings guide walks through.

WaterSense products, new homes and programs are certified by EPA to use at least 20 percent less water and to perform as well as or better than regular models. It covers items such as faucets and showerheads. It is not about materials or chemical content.

Wood and paper: FSC

The Forest Stewardship Council uses three labels. FSC 100% means all virgin material from FSC-certified forests. FSC MIX means a combination of FSC virgin fibre and recycled or controlled material. FSC RECYCLED means 100 percent recycled fibre. For furniture and flooring, 100% and MIX are different promises: the second only says part of the material is FSC-certified virgin. Neither says anything about adhesives or finishes.

Indoor air: GREENGUARD, Green Seal and TSCA Title VI

UL GREENGUARD certifies low chemical emissions from products such as furniture, flooring, mattresses and building materials, tested against UL 2818. The Gold tier sets lower limits for sensitive groups and limits emissions of more than 360 VOCs plus total chemical emissions. EPA says concentrations of many VOCs are consistently higher indoors, up to ten times higher, than outdoors, and that VOCs come from products numbering in the thousands, including paints, varnishes and building materials.

For paint specifically, Green Seal’s GS-11 verifies paints, coatings, stains and sealers as safer for human health and the environment than similar products while performing well, covering safer chemicals, sustainable packaging and verified performance. Our non-toxic upgrades guide applies these labels to paint, flooring and finishes.

TSCA Title VI is different in kind. Since March 22, 2019, hardwood plywood, MDF and particleboard, and finished goods made from them, sold in the United States must be labelled as TSCA Title VI compliant. That is a legal minimum for one chemical, not an eco label you choose.

Textiles: OEKO-TEX and GOTS

OEKO-TEX STANDARD 100 is a label for textiles tested for harmful substances: every thread, button and accessory is tested against a list of over 1,000 substances, with stricter limits where skin contact is more intensive. GOTS is a different promise: textiles made with certified organic fibres, with environmental and social requirements and annual on-site audits across the processing chain. A product can have one, both or neither.

Greenwashing red flags

The FTC’s Green Guides say it is deceptive to misrepresent that a product has been certified by an independent third party. They also say a seal that does not convey the basis for its certification likely implies a general environmental benefit, which marketers are unlikely to be able to substantiate. Watch for these:

• A seal with no named attribute. A leaf or globe with “eco” and no issuer or standard.
• A true label stretched across the whole product. A label on the packaging does not mean the product inside is certified; claims should say whether they cover the product, the package or part of it.
• A certifier you cannot find. If a web search for the issuer yields only the seller’s own site, treat the seal as marketing.
• A legal requirement presented as a virtue. TSCA Title VI compliance is the minimum for composite wood.
• “Non-toxic” or “chemical-free” with no test or standard behind it.

Decode a label in four steps

Take a bamboo sheet set marketed as “eco-friendly” with an OEKO-TEX STANDARD 100 logo and a green leaf. Look up the logo: it means the textile passed testing for harmful substances. Check what the label leaves out: it is not an organic-fibre claim, so the word “organic” would need a different basis such as GOTS. Treat the unnamed leaf as a general claim with no stated basis. Finally, ask the seller for the certificate. The result is a product certified for one thing and unproven for the rest, which is a useful thing to know before paying a premium.

The eco label decoder lists each label’s issuer, what it certifies and what it does not, with a link to the owner’s criteria. If your next project is about power rather than materials, the solar sizing and payback formula and the smart home guide cover that side of the home.