Section 302.207  Radioactivity

a)         Gross beta concentration must not exceed 100 picocuries per liter (pCi/L).

b)         Strontium 90 concentration must not exceed 2 pCi/L.

c)         The annual average radium 226 and 228 combined concentration must not exceed 3.75 pCi/L.

(Source:  Amended at 47 Ill. Reg. 4437, effective March 23, 2023)