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This article describes the challenge of treating drinking waters contaminated by perfluorinated compounds, especially perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS). A goal of the study was to establish the relative effectiveness for perfluorinated compound removal by the two primary types of granular activated carbons (GACs) commonly used in the treatment of municipal drinking water: bituminous coal‐based re‐agglomerated GAC and coconut‐based direct activated GAC. The effectiveness of GACs in removing PFOA and PFOS to nondetectable levels is demonstrated through the use of rapid small‐scale column testing. Results demonstrate that bituminous coal‐based re‐agglomerated carbons provide considerably greater removal capacity of the targeted compounds compared with the coconut‐based direct activated carbon. In support of these findings, summaries of additional third‐party test work and field installations are cited. In addition, the authors provide an overview of reactivation of activated carbon to improve the economics of the technology.

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