Does Chlorinated Water Kill Plants?
If you live within city limits or have water provided by the city, then you likely have chlorinated water. City water goes through a purification process that sanitizes the water and makes it safe for drinking and bathing. The water picks up trace amounts of minerals and chemicals, including chlorine and fluoride. Chlorinated water is potentially dangerous to plants, but only if the chlorine levels are significantly high. Does this Spark an idea?
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Considerations
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Chlorine naturally evaporates from the water when the water sits exposed to the air. If you have chlorinated water, the University of Minnesota suggests letting the water sit out at least 24 hours before using the water on your plants. For water gardening or plants that grow in the water, fill the container with chlorinated water and replace any water that evaporates with fresh water every day. The chlorine keeps algae from overtaking the water.
Expert Insight
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The University of Minnesota recommends using products that strip chlorine from water used on regular houseplants. Home and garden stores sell the liquid product. You add a small amount to the water and mix. Depending on the product, you may need to wait several hours until the chlorine dissipates from the water.
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Pool Water
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The water in your swimming pool contains high levels of chlorine. The chlorine regulates the water, keeps algae from growing in the water and keeps the water clear. Pool water disinfectants and bleach products contain chlorine. Provided you use the recommended dosage of cleaning products, the chlorinated water from the pool should not harm any plants growing in the surrounding area. A representative from Clemson University claims that the water has no effect on the surrounding areas.
Recommendations
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Dr. Alison Osinski of Aquatic Consulting Services recommends using pool water for plants in the surrounding area. Remove the cover from the pool and let the water sit for at least 24 hours. A small level of the chlorine dissipates from the water. Use the remaining water for watering plants and crops in your yard. The small levels of chlorine left in the water kill harmful bacteria growing in the soil and offers some protection for your yard and garden.
Warning
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Do not use water with high chlorine levels for regular or routine watering of houseplants. The chlorine builds up in the soil and may cause discoloration or even death. Plants that require more watering than others are more prone to problems because you pour more chlorinated water on the plants.
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References
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