Another factor that limits how much wastewater facilities can treat is the amount of radium in the wastewater. The NY DEC proposes to cap the level of maximum concentration of radium that treatment plants can accept in wastewater at 15 pCi/L to ensure wastewater treatment plant sludge does not become too contaminated to be disposed of. Recall that levels of 226 Radium ranged from 2.58 – 33 pCi/ L and 228Radium range from 1.15 – 18.41 pCi/ L.