Don’t take our word for it. Here’s every fact on this site, with its evidence grade, its caveats, and a link to the source, so you can check us.
We start you on the strong ones: findings that have been replicated or come from one large, well-controlled study. Moderate and weak facts are here too, labeled for what they are. Use “Link to this fact” to share a single card.
What you can do / Government agency
EPA says to never mix chlorine bleach solution with other cleaning solutions or detergents that contain ammonia, because toxic fumes could be produced.
Strong evidence: Well-established chemistry (chloramine gas formation); stated here as a direct safety instruction, not a study finding.
Source: US EPA, "A Brief Guide to Mold, Moisture and Your Home" Link to this fact
What you can do / Other evidence
EWG will not license air fresheners, candles, plug-in or timed-release odor products, or liquid laundry and dishwasher pods, so an EWG Verified mark will not be found on those product types.
Strong evidence: Reflects the 10.24 criteria; EWG may change categories, and unlicensed products are not necessarily worse.
Source: EWG Verified criteria for cleaning products (10.24), Environmental Working Group, 2024 Link to this fact
Information, not medical advice. See also: myths we won’t tell you.