PROVIDENCE, R.I. (AP) — A legislative commission in Rhode Island has been tasked with studying ways to prevent pharmaceuticals from entering the state’s water supply.

The commission will include lawmakers and representatives from health and environmental agencies. It will make recommendations on ways to reduce pharmaceutical contamination, which occurs when drugs taken by humans are passed into the water supply with wastewater.

The state cites a 2002 study that found 80 percent of the streams sampled in 30 states had amounts of prescription and non-prescription drugs, steroids or reproductive hormones.

State Sen. President Teresa Paiva Weed on Tuesday announced that senators John Tassoni and Roger Picard, both Democrats, will lead the commission.