Environmental Services / Engineering

Free Chlorination is a temporary process that distributes free chlorine in place of combined chlorine (chloramine) throughout the water distribution system as part of routine distribution system maintenance.

Free chlorination is a common practice used by water producers using the chloramine treatment method.  It is typically performed once or twice per year over a two to four week time-period to remove biofilms from inside the distribution pipes.

Free Chlorine is the use of chlorine-only, which is a stronger disinfectant than chloramines.

Chloramine is a disinfectant used in drinking water made up of chlorine and ammonia together.

Water treatment operators may chlorinate drinking water using either chlorine gas, liquid sodium hypochlorite solution (bleach), or dry calcium hypochlorite.

Chlorine has helped provide safe drinking water in the United States for more than 100 years.

Chlorine is by far the most commonly used drinking water disinfectant in all regions of the world.  Today, about 98 percent of U.S. water treatment systems use some type of chlorine disinfection process to help provide safe drinking water.  The U.S. Environmental Protection Agency requires treated tap water to contain a detectable level of chlorine to protect against germs as it flows from the treatment plant to consumers' taps.

The small amount of chlorine added to disinfect drinking water in accordance with U.S. Environmental Protection Agency regulations is safe for consumption.  According to EPA, allowable chlorine levels in drinking water (up to 4 parts per million) pose "no known or expected health risk."

This is a temporary process that lasts approximately three weeks.

No.

Yes. This is a commo industry practice.  There are many utilities in Broward County and throughout the country that use chloramines as a distribution system disinfectant which convert to free chlorine on a periodic basis.

No, the drinking water still meets all State and Federal water quality standards.

Some people may notice a change in the taste or the odor during this time, but adverse health effects are not expected.

Your water may taste or smell different because the City of Deerfield Beach is temporarily changing its disinfection process.  There will be a change from chloramines (a combination of chlorine and ammonia) to chlorine only.  Water systems using chloramines periodically change to chlorine as part of a maintenance program within the water distribution system.  During this temporary change to chlorine, you may notice a slight difference in the taste or smell of your tap water.

We suggest storing water in an open pitcher and placing in the refrigerator.  The chlorine will naturally dissipate from the water, and will become less noticeable.  Also, cold water tastes better.

As part of our commitment to provide safe and reliable water, the Utilities plant staff always monitor the water to determine when the system might need the treatment change.

Just as with chlorine, chloramines can harm all saltwater and freshwater fish, reptiles, shellfish, and amphibians that live in water.  Commercial establishments and hobbyists involved in fish rearing need to take precautions.  There are two methods that can be used to remove or neutralize chloramines before adding water to a fish tank, pond, or aquarium: (1) Granular Activated Carbon (GAC) filtration system specifically designed to remove chloramines, or (2) conditioner or additive that contains a de-chlorinating chemical for both ammonia and chlorine.  These products are available at local pet and aquarium supply stores.  The residential and commercial fish owners are advised to verify which method is best for them with their pet store or aquatic/aquarium retailer.

Flushing fire hydrants is a routine part of the free chlorination process.  This will occur in various parts of the City, as a result, increased flushing may be observed during this time.