California lawmakers are considering a proposal that could change how parents shop for diapers, by requiring manufacturers to disclose all intentionally added ingredients. The measure, known as Assembly Bill 1901, would apply to products used by roughly 1.3 million babies across the state.
The initiative reflects growing concern among consumer advocates about the lack of visibility into materials used in everyday childcare products. While diapers are worn continuously during early development, information about their composition has remained limited for most consumers.
A Transparency-Focused Bill Targeting Diaper Ingredients
Assembly Bill 1901 does not ban any substances. Instead, it centers on disclosure, requiring manufacturers to list every intentionally added ingredient used in children’s diapers. According to reports, this includes not only core materials but also components such as adhesives, dyes, fragrances, and wetness indicators.
The legislation outlines a phased timeline. By January 1, 2028, companies would need to publish ingredient information on their websites and online retail listings. One year later, packaging sold in California would also need to include directions for accessing that information, along with a full ingredient list.
The bill defines children’s diapers broadly, covering products designed to absorb or contain urine or fecal waste for infants and toddlers. This extends beyond disposable diapers to include items such as protective underwear, liners, inserts, and underpads.
Supporters of the measure, including the Environmental Working Group (EWG), Consumer Reports, and Children Now, argue that parents currently lack access to basic information about products used daily on their children. According to the EWG, the goal is to give caregivers clearer insight into what these products contain, allowing for more informed comparisons between brands.
Enforcement, Scope, and Potential National Implications
The proposal also introduces enforcement mechanisms. State regulators, along with local and state attorneys, would be authorized to monitor compliance. Companies that fail to meet the requirements could face civil or administrative penalties, with increased fines for repeat violations.
In addition to listing ingredients, manufacturers would need to provide each substance’s Chemical Abstract Service number and describe its function within the product. This level of detail is intended to standardize disclosures and make the information more usable for consumers and researchers alike.
The bill is currently under review by the Assembly Committee on Environmental Safety and Toxic Materials, where it will undergo further evaluation as part of the legislative process.
If enacted, California would become one of the first states to mandate comprehensive ingredient transparency for children’s diapers. According to the EWG, such a move could influence similar policies in other states, particularly as consumer demand for product transparency continues to grow.
For now, the proposal remains focused on information rather than restriction, aiming to shift decision-making power toward parents by making previously unavailable details more accessible.
