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UCLA Will Release Pink Dye at Santa Monica Pier

Researchers will release a non-toxic fluorescent tracer on September 29 to study water circulation patterns.

Updated on Sept. 28, 2026 in Environmental

Vibrant magenta dye swirls into the natural blue surf near the Santa Monica Pier, illustrating ocean water movement patterns.
UCLA researchers will begin releasing non-toxic pink tracer dye near the Santa Monica Pier on September 29 to map coastal water circulation patterns. AI Illustration. Upload story photo >

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UCLA researchers are set to release an EPA-approved pink fluorescent tracer dye into the ocean near the Santa Monica Pier on September 29, 2026. The study aims to measure wave-driven water circulation and assess local water quality around the coastal breakwater.

Why it matters

Understanding how water moves around the breakwater is essential for maintaining the health of the Santa Monica Bay ecosystem. The data will help scientists map circulation patterns that impact local water quality for the 4 million people residing in the watershed.

Researchers will track the dye plume using drones, cameras, a survey boat, and seafloor instruments. The tracer is an EPA-approved fluorescent dye that remains visible from the shore for several hours.

The players

UCLA

This public research university in Los Angeles is conducting the water circulation study.

Santa Monica Bay National Estuary Program

This organization was established by Congress in 1987 as one of 28 national programs dedicated to protecting bay ecosystems.

The details

The project will provide critical data on how water cycles around the breakwater, which is vital for the 5,000 species inhabiting Santa Monica Bay. The team plans to conduct three additional releases throughout October to refine their observations.

Timeline

  1. The dye release will take place on September 29, 2026, at approximately 11 a.m.

  2. Three additional dye releases are planned throughout October 2026.

  3. Researchers previously conducted four similar dye releases in fall 2025.

  4. The Santa Monica Bay National Estuary Program was originally created in 1987.

The Big Picture

This study operates under the mandate of the Santa Monica Bay National Estuary Program, which coordinates environmental research across one of the nation's 28 designated estuary programs. The findings update historical circulation models used to maintain the bay's ecological health.

Residents and beachgoers in Santa Monica may notice a visible pink dye plume in the ocean near the pier for several hours after the 11 a.m. release. The study will not affect public beach access, but local officials are monitoring potential weather impacts from Hurricane Polo.

The takeaway

This scientific initiative provides essential data for managing the water quality of the Santa Monica Bay watershed. Residents should be aware that the visible pink tracer is a safe, EPA-approved tool used for legitimate environmental research.

What happens next

Three additional dye releases are scheduled to occur throughout the month of October 2026.

Further reading

For more on local ecological studies, visit the Environmental section.

More information

For the latest developments regarding local weather conditions, check National Weather Service updates.

Source note: This article includes information reported by Canyon News.

Live Poll

Do you support local scientific experiments that involve releasing colored tracers in public coastal waters?