What PVA is
Polyvinyl alcohol is a synthetic polymer that dissolves in water. In a detergent sheet it binds the cleaning ingredients into a thin strip that keeps its shape until it meets water. Spot lists it in its nine-ingredient list; Seventh Generation also lists it.
Why people disagree
A 2021 peer-reviewed paper by Rolsky and Kelkar estimated that a large share of the PVA reaching US wastewater treatment plants is not fully degraded there and ends up in sewage sludge or effluent. It is an estimate, not a direct measurement.
The American Cleaning Institute, an industry group, disputes the paper's method and says PVA film biodegrades. It reports that the EPA kept PVA on its Safer Choice ingredient list in 2023 after a petition asked for its removal. An expert panel convened by SciPinion also concluded that PVA in laundry products is readily biodegradable.
In short: the question is open. Regulators and industry treat PVA as biodegradable; some researchers and competing brands argue that treatment plants do not break it down fully.
What is plastic-free about sheets
- The pack. Spot ships in a recyclable paper envelope, with no plastic jug or tub.
- The weight. Sheets carry no water, so shipping uses less fuel per load.
- The binder is the part under debate. If you want a formula with no PVA at all, check the ingredient list of any product you buy.
Frequently asked questions
Is the PVA in detergent sheets a microplastic?
It is disputed. PVA dissolves in water, so it is not a solid microplastic particle when you use it, but a 2021 study estimated most PVA reaching US treatment plants is not fully degraded there. Industry groups and the EPA's Safer Choice listing treat it as biodegradable.
Do Spot sheets contain polyvinyl alcohol?
Yes. Spot's ingredient list includes polyvinyl alcohol, which binds the sheet together. See the ingredients page for all nine ingredients.
Is Spot's packaging plastic?
No. Spot ships in a recyclable paper envelope.