Dawn is the best-selling dish soap in the United States, used by an estimated 1 in 3 American households. But what's actually in it — and how do they compare to eco alternatives that claim to be just as effective?
Below we compare Dawn with four eco alternatives on ingredients, packaging, and cost per wash, using each brand's published ingredient list.
What's Actually in Dawn?
Dawn Ultra contains: water, sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES) as primary surfactants, methylisothiazolinone (MIT) as a preservative, synthetic fragrances, and colorants. The main concerns:
- Methylisothiazolinone (MIT): The EU banned this preservative from rinse-off personal care products in 2016 due to skin sensitisation. In dish soap it remains in rinse water, where it has shown aquatic toxicity in multiple studies.
- Sodium laureth sulfate (SLES): Often contaminated with 1,4-dioxane, a probable carcinogen, depending on manufacturing process.
- Synthetic fragrance: A catch-all term that can include hundreds of undisclosed chemicals. In the EU, 26 allergens must be disclosed separately — not required in the US.
The Eco Alternatives
Branch Basics Concentrate (diluted for dishes)
Branch Basics doesn't sell a separate dish soap: you dilute its Concentrate for dishes. It uses mild plant-derived surfactants with no synthetic fragrance, dyes or MIT, which makes it a good fit for sensitive skin. It handles everyday dishes well; for heavy grease, soak first.
Available from Branch Basics and Amazon. Cost per wash: roughly $0.09
Ecover Dish Soap
Ecover uses plant-based surfactants and no MIT. Expect a little less lather than Dawn, which some people notice but which doesn't by itself mean less cleaning. Available at many US retailers and on Amazon.
Cost per wash: $0.07
Method Dish Soap
Method is better than Dawn but not as clean as Branch Basics or Ecover. It uses plant-derived surfactants but includes synthetic fragrance compounds and sodium methylparaben as a preservative. It cleans well and is easy to find, but the fragrance and preservative make it a middle-ground option rather than a top eco pick.
Seventh Generation Free & Clear
Seventh Generation's fragrance-free dish soap uses plant-based surfactants and contains no synthetic fragrances, colorants, or MIT. Available at Target, Walmart, Whole Foods, and Amazon.
At a Glance
| Product | Synthetic fragrance | MIT preservative | Plastic-Free Option | Cost/Wash |
|---|---|---|---|---|
| Dawn Ultra | Yes | Yes | No | $0.06 |
| Branch Basics | No | No | Concentrate | $0.09 |
| Ecover | Varies by scent | No | Refill pouch | $0.07 |
| Seventh Generation | No | No | Refill pouch | $0.07 |
| Method | Yes | No | Refill pouch | $0.08 |
Our Verdict
Best overall eco dish soap: Branch Basics. Among the simplest ingredient lists here, and the concentrate format means less plastic per wash than bottled alternatives.
Best budget eco option: Seventh Generation Free & Clear. Available at Walmart and Target at competitive prices, with no synthetic fragrance, dyes or MIT.
Looking for a complete eco kitchen cleaning upgrade? See our full guide: Eco kitchen cleaning guide 2026 — 7 non-toxic swaps that actually work
And if you're replacing your kitchen sponge at the same time, see Compostable kitchen sponge vs regular sponge — does it actually clean?
For the full roundup, including disinfectants, see the best eco-friendly cleaning products.
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