Rainwater Collection

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Why is Rainwater Collection Important?

Collecting rainwater is important because it helps conserve water resources, reduces reliance on municipal water supplies, and provides a sustainable source of water for various purposes such as irrigation and household use. By capturing rainwater, individuals and communities can save money on water bills, mitigate the impact of droughts, and contribute to environmental sustainability by reducing runoff and erosion.

Why Collect Rainwater?


Rainwater is naturally pure and free from the chemicals often found in treated municipal water supplies, making it ideal for various uses without harming plants, animals, or the environment.


Collecting rainwater decentralizes water distribution, reducing dependence on centralized water systems and empowering individuals and communities to manage their water resources sustainably.

Drought Resistance

Rainwater collection provides a buffer against droughts by storing water during rainy periods for use during dry spells, helping maintain plant growth and ecosystem health.

Water Conservation

By capturing rainwater that would otherwise run off into storm drains, rainwater collection conserves water resources and reduces the strain on natural water bodies and municipal water supplies.

Cost Savings

Utilizing rainwater for irrigation, household use, and other non-potable purposes can lead to significant savings on water bills over time, contributing to economic sustainability.

Reduce Need for Water Treatment

Since rainwater is relatively clean, collecting and using it reduces the need for energy-intensive water treatment processes, lowering environmental impact and operational costs.

Community Resilience

Rainwater collection builds community resilience by diversifying water sources, enhancing self-reliance, and mitigating the impacts of water scarcity and climate change.

Resilience to Climate Change

In the face of climate change and increasingly unpredictable weather patterns, rainwater harvesting provides a decentralized and adaptable water supply system that can help communities adapt to changing conditions.


Collecting rainwater empowers individuals and communities to become more self-sufficient in meeting their water needs, reducing dependence on centralized water supply systems and external water sources.

Promotion of Green Infrastructure

Rainwater harvesting encourages the use of green infrastructure solutions such as rain gardens, permeable pavement, and green roofs, which provide multiple benefits including habitat creation, improved air quality, and urban beautification.

How to Harvest Rainwater

Dams and Ponds

Constructing dams and ponds is a traditional yet effective method for storing rainwater. By creating reservoirs on the land, rainwater can be captured and retained, replenishing groundwater levels and providing habitats for aquatic life. Dams and ponds serve as natural storage solutions, releasing water gradually to support vegetation and wildlife during dry periods.


Swales are engineered depressions or shallow channels designed to intercept and redirect rainwater flow. These features are strategically positioned to capture runoff and allow it to percolate into the soil, replenishing groundwater reserves and minimizing soil erosion. Swales are particularly beneficial in hilly terrain or areas prone to flooding, where they help manage water flow and prevent waterlogging.

Rain Barrels

Installing rain barrels beneath downspouts from rooftops is a simple and cost-effective way to collect rainwater for various uses. These barrels capture runoff from roofs, storing it for later use in garden irrigation, outdoor cleaning, or other non-potable applications. Rain barrels are versatile and can be easily integrated into residential landscapes, providing a sustainable water source while reducing reliance on municipal water supplies.

IBC Tanks

Intermediate Bulk Container (IBC) tanks offer larger storage capacities compared to rain barrels, making them suitable for collecting and storing larger volumes of rainwater. These tanks are often used in household or agricultural settings to capture runoff from roofs or other impermeable surfaces. IBC tanks provide a reliable water supply for irrigation, livestock watering, or other agricultural activities, helping to conserve freshwater resources and reduce water expenses.

Brad Lancaster Techniques

Brad Lancaster’s innovative techniques focus on creating water-harvesting earthworks and basins to maximize rainwater capture and storage. By implementing strategies such as contour berms, check dams, and mulching, Lancaster’s approach enhances soil moisture retention and promotes plant growth. These water-harvesting features are integrated into landscape design, creating functional and aesthetically pleasing environments while conserving water resources.


The story below by Kirsten Dirksen,  at https://faircompanies.com/, chats to Brad Lancaster about his water irrigation sytems in the dessert!

Uses of Rainwater

Rainwater collected on your property can be utilized for various purposes, including:


Garden Irrigation

Using rainwater for garden irrigation helps conserve freshwater resources and promotes healthier plant growth without the use of chemical-laden tap water.

Livestock Drinking

Rainwater can serve as a clean and natural drinking source for livestock, reducing the need for treated water and improving animal health.

Household Use

Flushing toilets, washing clothes, dishes, windows and cleaning floors. 

Drinking Water

With proper filtration and treatment, rainwater can be made potable for drinking.

Bonus: Aquaculture in Stored Water

Stored rainwater in dams, ponds, or tanks can support aquaculture activities, such as raising fish or cultivating aquatic plants, enhancing the ecological value and productivity of your property’s water resources.



Rainwater collection plays a pivotal role in sustainable water management on permaculture properties, offering numerous benefits for both individuals and communities. By implementing effective rainwater harvesting techniques, you can conserve water, reduce costs, and enhance the resilience and productivity of your land.

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