Global Rainwater Harvesting Market Size, Share, Growth, Trends, and Global Industry Analysis: By Harvesting Method (Above Ground, Below Ground), By Application (Residential, Commercial, Industrial, Agricultural) and By Region 2020-2031

Rainwater Harvesting Market size was valued at US$ 985.3 million in 2024 and is projected to reach US$ 1,592.9 million by 2031 at a CAGR of 7.1% from 2025-2031. Moreover, the U.S. Rainwater Harvesting market is projected to grow at a CAGR of 6.8% over the forecast period. The market refers to the industry involved in the collection, storage, and utilization of rainwater for various purposes such as irrigation, domestic use, and industrial processes. This market encompasses a wide range of systems and components, including rooftop collection units, storage tanks, filtration systems, and distribution infrastructure. The growing demand for sustainable water management solutions, especially in regions facing water scarcity and erratic rainfall patterns, has driven the adoption of rainwater harvesting systems across residential, commercial, and agricultural sectors.

The market has seen significant growth due to increased environmental awareness, supportive government policies, and the need to reduce dependency on traditional water sources. Technological advancements have further enhanced the efficiency and accessibility of rainwater harvesting systems, making them a viable option for both urban and rural settings. As water conservation becomes a global priority, the market is expected to continue its expansion, offering innovative solutions that address the challenges of water sustainability and climate resilience.

Facts & Figures

• In July 2023, the National Water Mission (NWM) under India's Ministry of Jal Shakti signed a Memorandum of Understanding (MoU) with the Indian Plumbing Association (IPA). This collaboration aims to promote water use efficiency and the adoption of rainwater harvesting structures across the country.
• In October 2023, The Bureau of Indian Standards (BIS) developed an organic filter composed of sand, pebbles, and other natural materials to purify harvested rainwater before it recharges groundwater.

Key Developments

• In October 2024, Gravity Water, in collaboration with local agencies, installed three First Flush rainwater harvesting systems in Vietnam's Ca Mau province. These systems are designed to provide clean water access to schools in regions affected by drought and saline intrusion. The initiative underscores the importance of climate-resilient water solutions in vulnerable communities.
• In August 2024, Gravity Water partnered with WaterWatch Penang (WWP) to expand rainwater harvesting initiatives in Malaysian schools, particularly in Kelantan. The collaboration led to the installation of rainwater harvesting systems in 14 schools in Bachok, Kelantan, addressing water scarcity issues and promoting sustainable water management practices among students and communities.
• In September 2023, Pipelife Czechia introduced a comprehensive smart rainwater harvesting solution tailored for homeowners. This system integrates roof drainage, filtration, underground storage, and automated water level monitoring. Designed to be user-friendly, it allows for the reuse of rainwater in irrigation, toilet flushing, and laundry.

Rainwater Harvesting Market Segmentation

Based on the harvesting method:

• Above Ground
• Ground Surface
• Storage Tank
• Below Ground

Among the various harvesting methods, above-ground rainwater harvesting systems, particularly those using storage tanks, are currently leading the market. A key driver behind the dominance of above-ground storage tank systems is their ease of installation, cost-effectiveness, and widespread applicability in both residential and commercial settings. Unlike below-ground systems, above-ground tanks do not require extensive excavation or structural alterations, making them ideal for retrofitting existing buildings. These tanks are available in a wide range of sizes and materials—such as plastic, concrete, or steel—allowing users to select options based on their budget and water usage needs.

The simplicity of installation, combined with lower maintenance costs and visual accessibility for inspections and repairs, further adds to their appeal. In urban areas, where space is limited and rapid deployment is essential, above-ground storage tanks provide a practical solution for water conservation. Government subsidies and building codes in countries like India and Australia also favor rooftop rainwater collection into above-ground tanks, making adoption more viable for households. Additionally, the growing trend toward sustainable living and water self-sufficiency has made above-ground systems a preferred choice among environmentally conscious consumers. Their scalability and adaptability across diverse climates and geographies position them as a dominant segment in the market.

Based on the application:

• Residential
• Commercial
• Industrial
• Agricultural

Within the market, the residential segment is emerging as the leading application category, driven primarily by the growing awareness of water conservation and the increasing scarcity of municipal water supplies. One of the main drivers for this segment’s growth is the rising demand for alternative water sources in urban and suburban households. As populations expand and cities face mounting pressure on water infrastructure, homeowners are turning to rainwater harvesting systems to reduce dependence on centralized supply networks and lower utility costs. The ease of installing rooftop rainwater collection systems, especially with above-ground tanks, makes them particularly attractive for residential use. Governments across several countries are also encouraging residential adoption through subsidies, tax incentives, and mandates in building codes.

For example, in regions like India, Australia, and parts of the United States, new housing developments are often required to integrate rainwater harvesting systems. Additionally, the rising trend toward eco-friendly and self-sustaining homes has increased consumer interest in incorporating such systems into both new constructions and retrofits. The combination of environmental consciousness, economic benefits, and regulatory support continues to drive the dominance of the residential segment, positioning it as a key contributor to the overall growth of the market globally.