{"permit":"TN0029157","name":"Crucible Zinc, Inc.","state":"TN","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/TN0029157"},"about":[{"label":"What it is","text":"Lead And Zinc Ores (EPA's industry listing) · rated a major discharger by EPA"},{"label":"Where","text":"Clarksville, Tennessee","href":"https://www.openstreetmap.org/?mlat=36.516259&mlon=-87.406368#map=14/36.516259/-87.406368"},{"label":"Last 12 months","text":"No values over a limit. 9 required values not reported"},{"label":"Permit","text":"In force until Oct 31, 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