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 twice per year. 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.
What to Expect
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 chloramine disinfection.
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 read the FAQs on this page.
If you have questions regarding this matter, you may contact Heriberto “Eddie” De Leon, CPM, CWP at 832-595-3590.
- What is the “Water Distribution System Free Chlorine Maintenance Program?”
- Can I drink the water during this maintenance program?
- Why is the maintenance program being conducted?
- When will the program be conducted?
- Who will be affected?
- Are free chlorine and chloraminated water safe?
- What precautions should users of dialysis machines take?
- What precautions should fish owners take?
- Why are we switching to free chlorine so often?
- Do the local or regional distribution systems have a bacteria problem?
- What is free chlorine?
- What is combined chlorine or chloramine?
- Why does City of Rosenberg Utilities use chloramines most of the year?
- Will customers notice any changes in the water during the program?
- Why all the flushing?
- What changes can be expected once the routine maintenance is completed?
- If I have questions, who should I call for more information?