Sewage treatment plant phosphorus limits in Oklahoma and Arkansas have been on hold for ten years waiting on a pollution study by the U.S. EPA or the states of Arkansas and Oklahoma. The multi-million-dollar EPA study now sits of shelves attracting dust and the states have no plans for completing the study.
Click on the links below to see the 2019 data.
Phosphorus continues to exceed Oklahoma's Scenic Rivers Limit of .037 mg/L according to the 2019 report to the Arkansas-Oklahoma Arkansas River Compact Commission*
Phosphorus Loading of Oklahoma Scenic Rivers according to the 2019 report to the Arkansas-Oklahoma Arkansas River Compact Commission**
Phosphorus history of 5-year rolling averages at Watts, OK and Tahlequah, OK
**Phosphorus loading at Tahlequah above Lake Tenkiller is more than 45,000 kilograms or 49.5 tons per year, the equivalent of 33 dump truck loads of phosphorus entering Tenkiller yearly.
Photo of Illinois River by Kimberly Baker