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But acid rain can contaminate household water supplies by leaching metals from building and plumbing materials, the USGS says.
That includes rooftop rainwater-catchment systems that Hawaii residents use for drinking water.
“In 1988, the drinking water of nearly 40% of homes using such systems in the Kona Districts of the island was found to be contaminated with lead leached by acid rain,” the USGS says. “Tests confirmed that the blood of some residents of these homes had elevated lead levels.”
Businger told Hawaii News Now that acid rain is not an immediate health hazard, adding that it’s “the least of their (residents) worries.”