Techniques that provide local structural information, such as extended X-ray absorption fine structure (EXAFS), total scattering, nuclear magnetic resonance (NMR), ultraviolet-visible (UV-10 VIS) or X-ray photoelectron (XP) spectroscopy, on the other hand, do not have sufficient spatial resolution to permit analysis of materials with mixing level >1 . While atom probe tomography (APT) has successfully been utilized to map the Al distribution in zeolites and the metal distribution in multivariate MOFs, we required a more accessible characterization technique to support our synthetic method development . Electron paramagnetic resonance (EPR) spectroscopy has been used for detailed studies of bimetallic paddlewheel MOFs in which copper shares paddlewheel units with a second metal . Gratifyingly, we found that copper centers could not only provide information beyond their own paddlewheels, but also beyond their own MOP cage to report on the occupancy of the adjacent cages . EPR analysis thus permits rapid and reliable stratification of the MOP and MOF structomers obtained into mixing levels 1, 20 2, 3 and 4.