Arq, Inc. is an environmental technology company. The Company is principally engaged in the sale of consumable air, water, and soil treatment solutions including activated carbon (AC) and chemical technologies. Its AC products enable customers to reduce air, water, and soil contaminants, including mercury, per-and polyfluoroalkyl substances (PFAS) and other pollutants to meet the challenges of air quality and water regulations. It manufactures and sells AC and other chemicals used to capture and remove contaminants for the coal-fired power generation, industrial, municipal water and air, water and soil treatment and remediation markets. It offers a range of products in Granular Activated Carbon, which consists of CarbPure GAC and FluxSorb RG; Powdered Activated Carbon, which includes CarbPure PAC, PowerPAC, FastPAC, and FluxSorb RP; Colloidal Carbon Product, which includes FluxSorb RC; Arq Additives that include Arq Powder Wetcake, and Additives, which consists of M-Prove and RESPond.