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Chlorinated Water Discharge Options Chlorinated water discharged to surface water has an adverse effect on local water quality. Swimming pools are a major source of chlorinated water discharged into sanitary and storm sewer systems. An average swimming pool holds 19,000 gallons of highly chlorinated water, which is toxic to wildlife and fish.

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Applicability Many pool owners drain their swimming pools to reduce maintenance. Instead of discharging pool water to the storm sewer system or directly into a waterbody, such as the intercoastals or the Gulf of Mexico, these individuals should investigate alternative discharge options. Design Consideration The following Best Management Practices, or BMP’s are procedures that should be used to prevent pollutants, such as contaminated wash water and construction materials, from entering our storm drains and polluting our waterways. There are different options available to homeowners to prevent sending chlorinated pool water into storm drains. Discharge the chlorinated water to land where it will not drain to local surface waters. • Dechlorinate the water before draining the pool. • Before draining, allow water to sit in the pool for several days to dissipate the chlorine. Test the water to ensure chlorine has dissipated before draining. The City of Madeira Beach has kits to test the Chlorine in the water. The City will come and test your water at no cost to the homeowner. • If the only option for draining pool water is to discharge directly into the environment, water quality must comply with the applicable water quality criteria. • Pool water must sit for a least 2 days after the addition of chlorine or bromine or until chlorine or bromine levels are below 0.1 mg/l •The pH balance of discharge water must be between 6.5 and 8.5 before it is discharged. • Algaecide such as copper of silver can interrupt normal algal and plant growth and should not be used. • Total suspended solids must be below 60 mg/l. Suspended particles should be allowed to settle out, and water should not appear murky. Settled material should not be discharged with pool water. Drain water to vegetated areas such as a lawn or garden. • Discharges to the environment should be directed over a land surface so that some level of filtration by soil particles can occur. The water quality requirements listed above also apply to land-applied water. The above information should answer any questions that you may have regarding what your water discharge options are when draining a swimming pool. If you have any further questions or concerns call 399-2631, and the City will be happy to assist you.

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WAVE Newsltter - October 2013  

The Madeira Beach WAVE Newsletter - a community resource.