Attorney General Dustin McDaniel has announced an agreement between Arkansas and Oklahoma for a comprehensive study of phosphorous concentrations in the Illinois River watershed. It should take three years and the state’s agree to be bound by the findings.

Qualify of the river and tributaries has been a point of contention and legal action for at least a quarter-century, with Oklahoma pressing claims that water quality had been degraded by poultry operations. A lawsuit that began over Fayetteville wasterwater discharge ended with a 10-year agreement in 2003 under which Arkansas would work to reduce phosphorous output.


Read the latest agreement, a continuation of the 2003 pact, here.