London, 2025 — Claritas Intelligence has published its global market report on the Drinking Water Purification System sector, estimating the market at USD 29.6 billion in 2025 and projecting, under its base case, growth to USD 48.7 billion by 2033 — a compound annual growth rate of 6.4% over the 2025–2033 forecast period.
The most immediate demand catalyst is regulatory. The U.S. EPA's April 2024 final National Primary Drinking Water Regulations set maximum contaminant levels for PFOA and PFOS at 4 parts per trillion, with compliance required by 2027 for community water systems. The report estimates this mandate will drive more than USD 1.5 billion in incremental U.S. municipal system spend, as an estimated 66,000 community water systems require assessment for granular activated carbon, high-pressure nanofiltration, or anion exchange upgrades. Partial federal funding is available through the USD 15 billion PFAS allocation under the Infrastructure Investment and Jobs Act, though capital-constrained utilities face a substantial unfunded gap. In Europe, transposition of the revised Drinking Water Directive (2020/2184/EU) since January 2023 has triggered compliance procurement across all 27 member states — notably for PFAS monitoring and treatment equipment, with the directive's risk-based scope extending across the full distribution chain, not only treatment works.
Reverse osmosis holds an estimated 38% share of global system revenue in 2025, making it the dominant purification technology. The report's volume outlook leans heavily toward municipal infrastructure and industrial process water rather than residential point-of-use systems: A.O. Smith's consolidated revenue held within a USD 3.82–3.85 billion band across FY2023 through FY2025, and Pentair plc produced only modest top-line growth from USD 4.08 billion in FY2024 to USD 4.18 billion in FY2025 — both signals of structural pressure on branded residential pricing. By contrast, Xylem Inc., whose portfolio is weighted toward infrastructure and industrial applications, reported FY2025 revenue of USD 9.04 billion, up from USD 7.36 billion in FY2023, reflecting a 10.7% two-year CAGR across its water technology business.
North America is the largest regional market, supported by the PFAS retrofit cycle and the broader municipal capex environment. Asia Pacific is the fastest-growing region in the report's base case. India's Jal Jeevan Mission, targeting functional household tap connections across 192 million rural households, is generating sustained procurement demand for community-scale treatment systems. Secondary-city water infrastructure buildout across Vietnam, Indonesia, and the Philippines adds further volume. A separate technology dynamic is reshaping off-grid economics: levelized solar PV costs have fallen below USD 0.03 per kWh in high-irradiance regions, bringing solar-coupled RO and UV systems to cost parity with diesel alternatives for capacities up to 500 m³/day, and opening rural markets in Sub-Saharan Africa and South Asia that were previously uneconomic for private-sector operators.
"The narrative around residential point-of-use as the sector's margin engine deserves scrutiny. The disclosed financials from the largest residential-weighted operators point to pricing pressure, not expansion. The durable growth story is in municipal infrastructure and engineered systems, where regulatory mandates create non-discretionary procurement and project complexity protects incumbents with real execution capability."
— Priyanka Deshmukh, Senior Analyst, Claritas Intelligence
The report covers the full study period from 2019 to 2033, with 2025 as the base year, and profiles companies including Xylem Inc., Pentair plc, Veolia Environnement S.A., SUEZ SA, A.O. Smith Corporation, 3M Company, Culligan International Company, KENT RO Systems Ltd., DuPont Water Solutions, Pall Corporation (Danaher Corporation), IDE Technologies Ltd., and VA Tech Wabag Limited.
About Claritas Intelligence: Claritas Intelligence is a market intelligence publisher specializing in primary industry research, demand modeling, and competitive analysis across infrastructure, energy, and industrial sectors. Its reports serve strategy teams, institutional investors, and policy advisers requiring rigorously sourced, analyst-led market data.
The full analysis, including segmentation, regional breakdowns, forecasts, and company profiles, is available in the Drinking Water Purification System Market Report.
“The global drinking water purification system market is estimated at USD 29.6B in 2025 and the report projects growth to USD 48.7B by 2033 at a 6.4% CAGR, driven by PFAS regulation and Asia Pacific infrastructure spend.”
Priyanka Deshmukh
Team Lead – Energy & Natural Resources