UH-Hilo Study Reveals Urgent Sewage Contamination in Keaukaha, Hawaii

A two-year research project by the University of Hawaiʻi at Hilo (UH-Hilo) has exposed significant sewage contamination issues in Keaukaha, Hawaii. The study, conducted by marine scientists and students, highlights the concerning spread of sewage through groundwater, posing risks to public health and the environment.

The Study’s Methodology

The study utilized dye tracer tests to track the movement of sewage in Keaukaha. Lead researcher and UH-Hilo graduate student Shayla Waiki, who focused her thesis on this project, explained, “We found dye emerging at the shoreline every time, and the water moved fast, one to two football fields each day.” This rapid movement underscores the urgency of addressing the pollution problem.

Implications for Public Health

The findings confirm what Keaukaha residents have long suspected—wastewater from numerous cesspools near the shoreline is polluting coastal waters. This pollution can introduce harmful bacteria and pollutants, potentially causing infections like methicillin-resistant Staphylococcus aureus (MRSA). The rapid movement of sewage through groundwater increases the risk of contaminated waters reaching popular swimming and fishing spots.

County Efforts and Community Involvement

Hawaiʻi County’s Department of Environmental Management is actively working on upgrading wastewater treatment plants and converting large-capacity cesspools into more environmentally friendly systems by 2050—a state mandate. Tracy Wiegner, a marine science professor at UH-Hilo and co-author of the study, said, “Results from this research have been shared with the community and Hawaiʻi County, and are being used to prioritize locations for sewer line expansion in Hilo.”

The study’s findings have not only raised awareness but also driven concrete action. The researchers’ collaboration with the county aims to prevent further contamination and protect public health and the environment.

Long-Term Impact and Future Research

The collaborative effort between UH-Hilo faculty and students, including former graduate students Joseph Nakoa and Devon Aguiar, and marine science undergraduates Nicolas Storie and Ashlynn Overly, exemplifies student engagement in real-world environmental issues. Their work continues to influence environmental policies in Hawaiʻi.

“Our research is part of a broader effort to promote sustainable practices and protect our natural resources,” said Steve Colbert, a marine science associate professor and co-author. “This study serves as a reminder of the importance of proactive environmental management.”

Conclusion

The UH-Hilo study in Keaukaha highlights the critical need for immediate action to address sewage contamination. The findings not only drive policy changes but also underscore the importance of community involvement in environmental protection efforts.

As Hawaiʻi continues its transition towards sustainable waste management practices, this research provides a valuable framework for prioritizing efforts and ensuring clean, safe waters for future generations.

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