According to Koster, the incident began May 16th, the Tyson Food facility at Monett discharged wastewater containing a highly acidic animal feed supplement into the city's sewer system. The discharge caused to the city's biological wastewater treatment system to fail, and contaminated water containing a high level of ammonia flowed into Clear Creek, leading to the fish kill.
Koster's lawsuit contains six counts against Tyson for pollution of state waters and violations of Missouri hazardous waste laws. He is seeking penalties against Tyson, compensation for damage to the stream, and reimbursement for the state's costs in investigating the incident.
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