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Water Disinfection

Water Disinfection Process Updates

The City of Rosenberg’s water is rated as “Superior”. We are dedicated to continually providing clean, safe water to our citizens by closely following the disinfection schedule and complying with TCEQ mandates. This process will require occasional changes to the chemicals used to treat the water, as well as hydrant flushing to remove debris from the system. 

May 22, 2019
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City of Rosenberg Utilities Department Water Distribution System Quality Maintenance 

The City of Rosenberg public water system, (PWS) ID # 0790003, will temporarily convert the disinfectant used in the distribution system from chloramine to free chlorine. The conversion will begin on June 6, 2019 and continue through June 20, 2019. During this period, you may experience taste and odor changes associated with this type of temporary disinfectant conversion.

Public water systems are required to properly disinfect their water and maintain an adequate disinfectant residual in the distribution system. Chloramine, free chlorine combined with ammonia, is widely used as a disinfectant because it persists for long periods while also limiting the formation of disinfection by-product contaminants. Prolonged use of chloramine coupled with other factors that can impact water quality, such as high temperatures or stagnation of water, may result in the growth and/or persistence of organic matter within the pipes of the distribution system, which may hinder the ability to maintain an adequate disinfectant residual. A temporary conversion to free chlorine, partnered with flushing activities, helps to rid distribution pipes of this organic matter and improve the quality of your water overall.

Customers may notice a slight chlorine taste or odor in the tap water for a short period during the change. The water is safe to drink, to use for cooking, to bathe in and for other everyday uses. During this period, we will sample and test our water to monitor the effectiveness of the temporary modification. Once the free chlorine disinfection process is complete, we will return to the chloramination of water.

This temporary change in our treatment process is performed in accordance with State and Federal drinking water regulations. The Texas Commission on Environmental Quality (TCEQ), which regulates water quality, has approved this method for routine maintenance of potable water distribution systems.

Users of home kidney dialysis machines, owners of tropical fish aquariums and managers of stores and restaurants with fish and shellfish holding tanks are advised that the methods for testing and removing free chlorine residuals differ from those used for chloramine residuals. Both types of residuals if not handled properly may affect users of kidney dialysis machines, as well as fish and other aquatic animals. We encourage customers who may be affected by this change to seek advice from professionals and visit our website at https://rosenbergtx.gov/water-disinfection/ for Frequently Asked Questions (FAQ’s)

TCEQ Drinking Water Disinfection and the Free Chlorine Conversion Process FAQs [PDF]

Utilities Department Free Chlorine FAQs [Word]

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If you have questions regarding this matter, you may contact Heriberto “Eddie” De Leon, CPM, CWP at 832-595-3590.