Learning specific water reuse and conservation strategies, gardeners can utilize stormwater and other non-potable water sources (e.g., air conditioner condensate) to irrigate their garden or landscape. Sustainable gardens capture these resources, store them on-site and reuse them in the landscape. Doing so saves money and protects nearby ecosystems from harmful pollutants. In addition, the amount of water going to storm sewer systems is reduced, lessening the likelihood of flooding and combined sewer overflows.
- Conserving water reduces cost for irrigation.
- Storing stormwater reduces runoff and lessens the amount of water that contributes to flooding.
- Reusing captured stormwater reduces the need for irrigation via potable water.
- Harvesting water from non-potable sources like air conditioner condensate or greywater minimizes dependency on potable water use.
Additionally, water in a landscape can provide opportunities for restorative experiences and reflection. Such activities may promote healing, stress reduction and work productivity. The benefits people derive from having a stronger physical and mental connection to water and its sources are innumerable.
Water use is also apparent in many of our local community resources, such as fire-fighting, maintaining local parks or filling municipal swimming pools. However, communities all across the country are starting to face challenges regarding the supply and availability of water for these local services.
Using water wisely and efficiently, as well as planning creative and restorative uses for water in the landscape, will address the importance of restoring and maintaining natural water sources and systems, and will allow people to have a stronger mental and physical connection to water and the local climate.
Common sources of stormwater pollution:
Fertilizers, Herbicides and Insecticides
Excess nutrients from overuse of fertilizer can cause algal blooms when fertilizer runs off as part of stormwater. When algae die, they sink to the bottom and decompose in a process that removes oxygen from the water. Fish and other aquatic organisms can’t exist in water with low dissolved-oxygen levels. Insecticides and herbicides present in stormwater can poison aquatic life, while land animals and people can become sick from eating contaminated fish and shellfish or drinking pesticide-contaminated water. Homeowners can reduce the risk of these pollutants by minimizing their use of fertilizers and pesticides. Any excess fertilizer spread on driveways, sidewalks, streets or other impervious surfaces should be collected and properly disposed of before it has an opportunity to pollute stormwater.
Rock salt can leach into soil, changing its chemical composition, and it can poison fish and aquatic organisms after flowing into local waterways as part of stormwater runoff. It is also harmful to sensitive plants. Salt is highly corrosive to paved surfaces, buildings and metal. Alternatives to rock salt include materials that increase traction, such as kitty litter and sand. For situations where a product that actually melts ice is required, look for rock salt substitutes such as those made with beet juice extracts, a byproduct of beet sugar production that would normally be disposed of as waste. Magnesium chloride, which is safer to use near plants than rock salt (but not as effective in very cold conditions) is another possibility.
Fluids From Automobiles
Coal Tar Sealants
Freshwater supports our environment and sustains our lives. It is essential to human survival, our livelihoods and almost every form of economic production. This finite resource is required for producing food, clothing and electronics; transporting waste; and supporting the natural environment.
These landscape practices contribute to freshwater shortages:
- Planting species not suited to local rainfall patterns
- Wasteful irrigation practices
- Degraded soil conditions that limit the infiltration and water-holding capacity of the soil
- Paving, roofing and other impervious surfaces that prevent water from infiltrating the soil and recharging groundwater supplies
- Treating stormwater as waste and funneling it to sewers before it has an opportunity to benefit the landscape.
Unsustainable vs. Sustainable Landscapes:
How They Compare
- Treats stormwater as a waste product that is quickly removed from the site, contributing to water pollution.
- Most irrigation systems use municipal drinking water.
- Manages stormwater on site. Uses stormwater as a resource to sustain the landscape.
- Minimizes the use of potable water. Supplements water in the landscape with on-site alternatives such as harvested rainwater, stormwater or air conditioner condensate.
GET STARTED WITH WATER
BECOME A LANDSCAPE FOR LIFE TEACHER!
Landscape For Life includes a complete kit of teaching resources which can be used to conduct classes in sustainable home gardening. New training opportunities coming in 2023!
Landscape For Life™ is a collaboration between Colorado State University Extension and the United States Botanic Garden based on the principles of the Sustainable Sites Initiative (SITES®).