Palm Coast switches to free chlorine in water supply for annual maintenance

Palm Coast water customers will notice a temporary change in their tap water starting November 4, as the city shifts its disinfection method from chloramines to free chlorine for a three-week maintenance period. The City of Palm Coast Utility Department announced the routine system flush will run through November 24, 2026, affecting not only Palm Coast residents but also customers in Marineland, Painters Hill, and Beverly Beach served by the Florida Governmental Utility Authority.

The annual procedure is designed to maintain water quality and system reliability, but it carries specific implications for dialysis patients, aquarium owners, and anyone sensitive to the taste and odor of chlorine in drinking water.

What's happening

From November 4 through November 24, 2026, Palm Coast will temporarily disinfect its potable water supply with free chlorine rather than the combined chlorine/ammonia treatment known as chloramines that the city typically uses. The periodic conversion is part of a maintenance program supported by the Florida Department of Environmental Protection.

The city characterizes the switch as a normal procedure for municipal water systems. Free chlorine is a stronger disinfectant, while chloramines—the city's standard treatment—are a longer-lasting disinfectant. The temporary use of the more aggressive free chlorine helps ensure water quality throughout the distribution system.

Daily testing will monitor water quality and measure the effectiveness of the program throughout the three-week period. Once the process is complete, the utility will revert to its usual chloramines disinfection method.

The change affects all Palm Coast water customers as well as residents and customers of Marineland and the Florida Governmental Utility Authority who reside in Painters Hill and Beverly Beach, communities that receive water from Palm Coast's system.

Impact on medical patients and dialysis users

The most critical public-health consideration during the disinfection switch involves dialysis patients. Customers on dialysis who use a proportioning machine to prepare dialysate are advised to contact their physician to obtain the appropriate steps to accommodate the change in water disinfection, according to the city's notice.

Dialysis machines filter blood directly, and chlorine—unlike chloramines—can damage red blood cells if it enters the bloodstream. While chloramines also require removal before dialysis, the chemical properties of free chlorine demand different filtration protocols. Dialysis centers are typically equipped to handle both disinfectants, but home dialysis patients must ensure their water-treatment equipment is adjusted appropriately.

The notice from Palm Coast Utility Department does not specify how many home dialysis patients are served by the system, but the warning underscores the importance of coordinating with healthcare providers before the November 4 start date. Most dialysis water-treatment systems can accommodate free chlorine with filter adjustments or activation of backup carbon filtration stages that strip chlorine from water before it reaches the dialysis machine.

What aquarium owners need to know

Aquarium hobbyists and anyone maintaining aquatic species face a separate set of challenges during the three-week chlorine period. The city advises customers who have fish tanks or aquatic species to contact a professional aquarist to avoid problems associated with chlorine.

Free chlorine is toxic to fish and other aquatic life even at the low concentrations used to disinfect drinking water. While chloramines also pose risks to fish, the higher reactivity of free chlorine means it can kill fish more quickly if untreated tap water is added to a tank during water changes.

Standard aquarium dechlorination products—widely available at pet stores—are formulated to neutralize free chlorine. However, the dosing and contact time may differ from what is required for chloramine removal. Aquarists maintaining sensitive species, reef tanks, or large systems such as koi ponds are encouraged to test their water and verify that dechlorination chemicals are effective during the switch.

The city's recommendation to consult a professional reflects the variability in home aquarium setups. Some hobbyists use reverse-osmosis or carbon filtration systems that remove chlorine before water enters the tank; others rely on chemical conditioners. The key question for each system is whether the existing treatment protocol will handle free chlorine at the concentrations Palm Coast delivers during the November maintenance window.

Taste, odor, and everyday household use

Most Palm Coast water customers will experience the disinfection change primarily through taste and odor. The city's notice warns that customers may experience a slight increase in the taste and odor of chlorine during the three-week period.

Free chlorine produces the sharp, pool-like smell and taste many people associate with heavily treated water. The sensory change does not indicate a water-quality or safety problem—it is a byproduct of the stronger disinfectant doing its job. Customers who are particularly sensitive to chlorine taste may choose to refrigerate drinking water in an open pitcher, allowing some of the chlorine to dissipate, or use activated-carbon filters such as pitcher filters or faucet-mount units, which remove free chlorine effectively.

For everyday household tasks—cooking, bathing, laundry—the switch to free chlorine typically requires no adjustments. The disinfectant is safe for human contact and consumption at municipal water-treatment levels. However, the more volatile nature of free chlorine means it can affect the flavor of coffee, tea, and other beverages more noticeably than chloramines do.

The temporary nature of the program limits any long-term concerns. Once the maintenance flush is complete on November 24, the utility will return to chloramines, and the taste and odor profile of Palm Coast tap water will revert to its usual baseline.

Why utilities flush with free chlorine

The Palm Coast maintenance program reflects a standard practice among water utilities that use chloramines for routine disinfection. Over time, biofilm—a thin layer of microorganisms—can accumulate on the interior surfaces of water-distribution pipes. Chloramines, because they are longer-lasting and less reactive than free chlorine, are effective at maintaining a disinfectant residual as water travels from treatment plants to customers' taps, but they are less aggressive at scrubbing pipes clean.

Periodic conversion to free chlorine allows utilities to apply a stronger oxidizing agent that breaks down biofilm, organic matter, and other deposits inside the distribution system. The result is improved water quality and system reliability. The Florida Department of Environmental Protection, which regulates public water systems under state safe-drinking-water standards, supports the practice as a proactive maintenance measure.

Daily testing during the three-week flush will track chlorine residuals and other water-quality parameters at multiple points in the distribution network, ensuring that disinfectant levels remain within safe and effective ranges. Utilities must maintain a minimum disinfectant residual to prevent microbial growth while avoiding excessively high levels that could cause taste, odor, or corrosion issues.

Palm Coast's announcement describes the program as normal procedure, suggesting the city conducts these flushes on a recurring schedule. Many chloramine-using utilities perform free-chlorine conversions annually or biannually, often choosing cooler months when water demand is lower and the logistics of monitoring are simpler.

What happens next

The free-chlorine disinfection period begins November 4, 2026, and is scheduled to continue through November 24, 2026. During those three weeks, the City of Palm Coast Utility Department will conduct daily water-quality testing to monitor the effectiveness of the maintenance program.

Customers with questions or concerns about the disinfection change are asked to call Palm Coast Customer Service at (386) 986-2360. The city has not announced public meetings or additional notifications related to the program; the November 4 notice serves as the primary public communication.

Dialysis patients and aquarium owners are encouraged to take action before November 4 to ensure their systems are prepared for the switch. Once the three-week period concludes on November 24, the utility will revert to its standard chloramines disinfection method, and water taste and odor will return to normal.

Flagler County's infrastructure and growth context

Palm Coast, the largest city in Flagler County, has grown rapidly over the past two decades as retirees and families have moved to the area's golf-course communities and coastal access points. The city's water distribution system serves a customer base that continues to expand, making routine maintenance programs such as the November disinfection flush an essential part of infrastructure management.

Flagler County sits between St. Johns County to the north and Volusia County to the south, positioning Palm Coast as part of the broader Northeast Florida growth corridor. As the region adds rooftops, the capacity and reliability of water and wastewater systems come under increasing scrutiny. Proactive maintenance—such as periodic free-chlorine conversion to control biofilm and optimize distribution-system performance—helps utilities stay ahead of the operational challenges that accompany population growth.

The three-week program is a reminder that even routine infrastructure upkeep carries implications for residents, particularly those with medical conditions or specialized water needs. For most customers, the temporary increase in chlorine taste will be the only noticeable effect, but for dialysis patients and aquarists, the disinfection switch demands timely preparation and, in some cases, professional consultation.