Independent lab finds hexavalent chromium and arsenic in discharge from Tesla's Texas lithium refinery
A 24-hour water sample commissioned by a Nueces County drainage district detected hexavalent chromium, arsenic, strontium, vanadium, and ammonia in discharge from Tesla's $1 billion Robstown lithium refinery. The substances were not in Tesla's TCEQ permit and were not tested for in the state's February 2026 investigation. The refinery is the most visible US-domiciled lithium hydroxide processing facility and a key node in the domestic critical-minerals supply chain.