A new two-year research project found the balls not only were ineffective, they might make water quality worse. Supporters of the effort don’t believe it.
In the past six years, several thousand elementary school students and other volunteers have tossed over a quarter million tennis ball-sized globs of soil, molasses and rice bran into the Ala Wai Canal in a valiant effort to help clean Hawaiʻi’s most notoriously polluted urban waterway.The goal is to get those globs, known as “genki balls,” to release special sludge-eating microbes into the Waikīkī canal’s murky depths and boost its water quality. Since the effort started, canoe paddlers and others have at times observed clearer water and more fish. They’ve even spotted the occasional monk seal and an eagle ray.
But new research from Hawaiʻi Pacific University done on Oʻahu’s Windward side casts doubt on whether the genki balls actually led to any of that improvement — or if the novel approach that inspired the community is too good to be true. (...)
The balls, according to HPU Associate Professor Olivia Nigro and Assistant Professor Carmella Vizza, did nothing to improve water quality in the marsh canal. And in the aquarium tanks, the microbes the balls were supposed to release failed to appear in any meaningful way, the researchers said, plus the water quality actually got worse.
Specifically, phosphate levels were almost 20 times higher in the tanks with the balls than in tanks without them, Vizza said, and oxygen levels in the tanks with the balls fell by about 50%.
The nonprofit that organizes those cleanups, Genki Ala Wai Ball Project, is firmly pushing back against the research, saying insufficient genki material was used and its ball tosses into the Ala Wai remain effective. Yet one of the project’s leaders sold the balls used in the HPU study and recommended how the researchers should use them.
The HPU ecologists who completed the study don’t want to dampen any of the community enthusiasm. But far more rigorous study of the Ala Wai is needed, they say, to know exactly how the genki balls are impacting water quality there, if at all. (...)
If We Do This, We Can Do Anything
The Ala Wai, a 1.5-mile canal that developers carved across Waikīkī in the 1920s to sell real estate, has long been a stark symbol of how much urban runoff is affecting Hawaiʻi’s fragile watersheds. (...)
It now bears the brunt of storm debris from Hawaiʻi’s densest and most heavily populated watershed, in the heart of Honolulu. For decades, state officials have prohibited anyone from fishing or swimming in its waters.
In one high-profile 2006 incident, an Oʻahu man who fell in the Ala Wai died of “massive bacterial infection” following weeks of heavy rain across the state. Canoe clubs and high school teams regularly paddle up and down the canal and do their best not to huli, or flip over, into its murky waters.
... the Genki Ball Ala Wai Project launched with a goal of making the canal safe for swimming and fishing within seven years by deploying 300,000 balls. Genki translates to “health” or “energy” in English.
The key ingredient baked into every dry, cured ball tossed in the water is a trademarked substance called “EM,” short for “effective microorganisms.”
It was pioneered in the early 1980s by a horticulture professor in Okinawa, Japan, who combined naturally occurring yeasts and bacteria to help boost farm crop yields. Since then, people also found that they could take it to improve digestion and gut health.
It was pioneered in the early 1980s by a horticulture professor in Okinawa, Japan, who combined naturally occurring yeasts and bacteria to help boost farm crop yields. Since then, people also found that they could take it to improve digestion and gut health.
Images: David Croxford
[ed. Ouch.]
