San Antonio , Texas - October 16, 2019 - Engineers who specialize in water treatment working at a privately owned municipal water treatment plant that serves a small portion of suburban San Antonio. ©Bob Daemmrich

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Photo credit: © Bob Daemmrich / Alamy / Afripics
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Keywords: antonio, city, engineers, industry, infrastructure, iwi, municipal, occupation, plant, san, sewage, texas, treatment, wastewater, water, waterways, worker, workers