Table 1 to Subpart A of Part 192—Maximum Concentration of Constituents for Groundwater Protection
Constituent concentration 1
1 Milligrams per liter, unless stated otherwise.
2 Where secular equilibrium obtains, this criterion will be satisfied by a concentration of 0.044 milligrams per liter (0.044 mg/l). For conditions of other than secular equilibrium, a corresponding value may be derived and applied, based on the measured site-specific ratio of the two isotopes of uranium.
Nitrate (as N)
Combined radium-226 and radium-228
Combined uranium-234 and uranium-238 2
Gross alpha-particle activity (excluding radon and uranium)