The peroxide-based groundwater remediation chemicals market is projected to grow from USD 470.3 million in 2026 to USD 1,123.6 million by 2036, at a CAGR of 9.1%. Hydrogen Peroxide (H₂O₂) will dominate with a 36.0% market share, while petroleum hydrocarbon contamination (btex, tph) will lead the application type segment with a 34.0% share.