Rainwater Harvesting Systems Market Report 2026

The rainwater harvesting systems market size has grown strongly in recent years. It will grow from $2.07 billion in 2025 to $2.2 billion in 2026 at a compound annual growth rate (CAGR) of 6.1%. The growth in the historic period can be attributed to water scarcity concerns, rising urban population, increasing irrigation demand, traditional water supply limitations, early sustainability initiatives.

The rainwater harvesting systems market size is expected to see strong growth in the next few years. It will grow to $2.78 billion in 2030 at a compound annual growth rate (CAGR) of 6%. The growth in the forecast period can be attributed to smart city infrastructure investments, stricter water conservation regulations, growth in climate resilient construction, rising agricultural water demand, increased adoption of sustainable building practices. Major trends in the forecast period include growing adoption of rooftop rainwater collection, increased use of modular storage tanks, rising integration with green infrastructure, higher demand for low cost retrofit systems, expansion of decentralized water management.

The rising water scarcity is expected to propel the growth of the rainwater harvesting systems market. Water scarcity is the condition where the demand exceeds the available supply, leading to insufficient freshwater resources to meet a specific area's human and environmental needs. Rising water scarcity is driven by increasing global demand, climate change, population growth, and inadequate water management practices. Rainwater harvesting systems address growing water scarcity by substantially augmenting water availability, aiding in replenishing local aquifers, mitigating urban flooding, and guaranteeing water access in areas prone to water scarcity. For instance, in May 2023, according to the United Nations Educational Scientific and Cultural Organization (UNESCO), a France-based specialized agency of the United Nations, 2 billion people lack safe drinking water (26% of the global population), and 3.6 billion lack proper sanitation (46%). Moreover, the urban population facing water scarcity will reach 1.7 to 2.4 billion people in 2050. Therefore, rising water scarcity is driving the growth of the rainwater harvesting systems market.

Major companies operating in the rainwater harvesting systems market are increasing their focus on developing advanced solutions and products, such as new residential rainwater harvesting systems, to gain a competitive edge in the market. These systems are designed to capture and store rainwater from rooftops or other surfaces for later use in domestic applications, such as drinking, washing, and bathing, and typically consist of collection surfaces, conveyance systems, storage volumes, and distribution systems. For instance, in February 2023, Stormsaver Ltd., a UK-based company specializing in rainwater harvesting, launched two new residential rainwater harvesting systems. This system features a variety of capacities, such as an internal break tank for water safety, a Type AB air gap for preventing backflow, an integrated twin booster set for maintaining water pressure, and glass-reinforced plastic (GRP) construction for durability. These technological developments enhance usability and compliance and contribute to water conservation, cost savings, and environmental sustainability in the rainwater harvesting systems market, making them attractive for residential applications.

In July 2023, Oldcastle Infrastructure Inc., a US-based building material company, acquired Hydro International Ltd. for an undisclosed amount. This acquisition brings enhanced product breadth, market expertise, and innovation potential, significantly strengthening Oldcastle's position in providing comprehensive rainwater harvesting solutions and addressing critical water treatment needs in the market. Hydro International Ltd. is a UK-based company that provides water management solutions, including rainwater harvesting and storage systems.

Major companies operating in the rainwater harvesting systems market are Kingspan Group Plc, Watts Water Technologies Inc., Caldwell Tanks Inc., CST Industries Inc., Metroll, Snyder Industries, Bushman Tanks, Otto Graf GmbH Kunststofferzeugnisse (Graf Holding GmbH group), Norwesco, Water Field Technologies Pvt. Ltd., Stormsaver Ltd., Barr Plastics Inc., WISY AG, Innovative Water Solutions LLC, D&D Ecotech Services, Heritage Water Tanks, Water Harvesting Solutions Inc. (Wahaso), Molloy Precast Products Ltd., Oasis Water Harvesting, Ecozi Ltd., HarvestH2o, Rain Harvesting Supplies Inc., Climate Tanks, Harvest Rain Inc., RainHarvest Systems LLC, Aquabarrel LLC, Rainwater Management Solutions Inc.

North America was the largest region in the rainwater harvesting systems market in 2025. Asia-Pacific is expected to be the fastest-growing region in the forecast period. The regions covered in the rainwater harvesting systems market report are Asia-Pacific, South East Asia, Western Europe, Eastern Europe, North America, South America, Middle East, Africa. The countries covered in the rainwater harvesting systems market report are Australia, Brazil, China, France, Germany, India, Indonesia, Japan, Taiwan, Russia, South Korea, UK, USA, Canada, Italy, Spain.

The rainwater harvesting systems market consists of sales of products such as rainwater green roof systems, gutter guards, rain barrel systems, downspout diverters, and rain barrels. Values in this market are ‘factory gate’ values, that is the value of goods sold by the manufacturers or creators of the goods, whether to other entities (including downstream manufacturers, wholesalers, distributors and retailers) or directly to end customers. The value of goods in this market includes related services sold by the creators of the goods.

The market value is defined as the revenues that enterprises gain from the sale of goods and/or services within the specified market and geography through sales, grants, or donations in terms of the currency (in USD unless otherwise specified).

The revenues for a specified geography are consumption values that are revenues generated by organizations in the specified geography within the market, irrespective of where they are produced. It does not include revenues from resales along the supply chain, either further along the supply chain or as part of other products.

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