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County utility reports about 99% drop in hydrogen sulfide at Wood Hill after week of chemical feed
Lake County Board of Commissioners · December 18, 2025
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Summary
Utility staff told commissioners a downstream monitor showed hydrogen sulfide levels fall from roughly 200–300 ppm to about 10–20 ppm within about a week of starting a chemical feed; staff said the chemicals are part of the treatment process and will be evaluated for permanent application.
Utility staff reported a rapid, substantial reduction in hydrogen sulfide at the Wood Hill area after beginning a chemical feed about a week earlier.
A utility representative said a downstream manhole monitor measured hydrogen sulfide levels "from about 2 or 300 parts…
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