Table of Contents
Chloramines and Disinfection By-Products: Occurrence and Control
A technical paper by Olympian Water Testing specialists
The history and development of chloramine use as a disinfectant in water treatment
Chloramines are a disinfectant for nearly 100 years. The history and evolution of chloramine disinfection as water treatment has been radically different with the first chloramines deployed in the early 20th century and continued to evolve. In this subtopic, we will see the history of chloramine in water treatment: when and why did it first come into use, and how has it changed over time.
Initially, chloramines were used as a water disinfectant only in the early 20th century. Chlorine was by now commonplace as a disinfectant, but fears of the possibility of creating deleterious disinfection by-products (DBPs) drove the need for other disinfectants. A promising substitute were chloramines because they produced fewer DBPs than chlorine [1].
The first chloramines were used as a second-pass disinfectant, alongside chlorine. That was because chloramines were more ineffective than chlorine as a disinfectant general. [2] But as research on chloramines went on, chloramines proved capable of being employed as a primary disinfectant, and chloramines were started to be employed as a primary disinfectant.
Chloramines in water treatment didn’t stop developing. As the United States Environmental Protection Agency (EPA) cut back on DBPs in drinking water in the 1970s, chloramines were introduced as a primary disinfectant. [3] Further, when DBP regulations became more stricter, the use of chloramines spread in order to keep up.
The chloramines’ use evolved more recently. Due to fears over the health effects of chronic exposure to chloramines in very low concentrations, there has been work to develop ways to measure chloramines in water and assess the efficacy of chloramine treatment. [4] Also, as water treatment becomes more sustainable, the push towards non-DBP-forming disinfectants (for example, ultraviolet light and ozone) is increasing.
Conclusion: The evolution and use of chloramine as a disinfectant in water treatment has been long. First used as a disinfectant in the early 20th century because chlorine can produce DBPs. First, chloramines were a secondary disinfectant, but with more research, chloramines could be a primary disinfectant. Chloramines in water treatment is evolving – recent studies are looking at chloramine concentration in water and whether chloramine treatment is effective, while alternative disinfectants without DBPs are being used more frequently.
[1] American Water Works Association. (2019). Chloramines in Drinking Water.
[2] United States Environmental Protection Agency. (2010). Disinfection with Chloramines.
[3] United States Environmental Protection Agency. (2017). Disinfection Byproducts Rule.
[4] National Sanitation Foundation International. (2019). Chloramines in Drinking Water.
The benefits and drawbacks of using chloramines compared to other disinfectants such as chlorine
There are two disinfectants used widely for water treatment — chloramines and chlorine. But they differ substantially in their efficiency and safety as a method of killing bacteria and other pathogens, as well as their ability to produce noxious disinfection by-products (DBPs). In this sub-subtopic, we will explore how chloramines compare to other disinfectants like chlorine.
One of the best aspects of chloramines as a disinfectant is that they kill bacteria and other microorganisms better than chlorine. Chloramines remain more effectively disinfectant than chlorine over time, and thus better at long-term disinfection. [1] In addition, chloramines have less tendency to recombine into harmful DBPs like trihalomethanes (THMs) than chlorine [2].
But chloramines are not perfect disinfectants either. The biggest disadvantage is that they kill more germs like Cryptosporidium than chlorine [3]. Also, chloramines are more corrosive than chlorine on some metals like copper and brass which can damage pipes and other plumbing fittings [4].
Another plus to chlorine as a disinfectant is that it’s much more available and cheap than chloramines. Then there is chlorine, which kills more germs, like Cryptosporidium. But chlorine accumulated toxic DBPs more harmful than chloramines – including trihalomethanes (THMs) and haloacetic acids (HAAs) [5].
Conclusion Chloramines and chlorine have pros and cons as water treatment disinfectants. As chlorine, chloramines kill bacteria and other pathogens more efficiently, but they don’t produce harmful DBPs. But chloramines don’t kill some pathogens and are more corrosive than chlorine to some metals. Chlorine, meanwhile, is easier and cheaper to find than chloramines and kills some pathogens better, but produces more toxic DBPs. Water treatment plants and labs should consider the pros and cons of each disinfectant, and select the one that’s most suitable for their needs and requirements. Then there should also be further studies of the effectiveness and safety of both disinfectants to keep water safe and high-quality.
[1] S. R. Edzwald, "Chlorine and chloramines as water disinfectants," Journal – American Water Works Association, vol. 94, no. 8, pp. 102-112, 2002.
[2] S. R. Edzwald, "Chlorination and chloramination," in Water Quality and Treatment: A Handbook on Drinking Water, 6th ed, McGraw-Hill, 2011, pp. 8-1 to 8-22.
[3] R. W. Herricks, "Chloramines in Drinking Water," Journal – American Water Works Association, vol. 92, no. 12, pp. 64-74, 2000.
[4] M. W. LeChevallier and K. E. McFeters, "Microbiological aspects of chloramination," Journal – American Water Works Association, vol. 84, no. 7, pp. 88-96, 1992.
[5] R. W. Herricks, "Chlorination and chloramination," in Water Quality and Treatment: A Handbook on Drinking Water, 6th ed, McGraw-Hill, 2011, pp. 8-1 to 8-22.
The formation and occurrence of disinfection by-products (DBPs) in chloraminated water systems
The disinfectants in your water treatment system are going to contain disinfectant by-products (DBPs), even chloramine water treatment systems. DBPs in chloraminated water systems arise and are created by the chemical reaction between the disinfectant (chloramines) and the organic and inorganic components of the water. This subtopic will cover the type of DBPs generated when chloramines are used as a disinfectant and how they impact treated water quality and safety.
When chloramines are used as a disinfectant in water treatment, there are several kinds of DBPs that can be generated. Most widely produced DBPs in chlorinated water are haloacetic acids (HAAs) and nitrosamines. [1] HAAs occur when chloramines react with organic materials present in the water; nitrosamines occur when chloramines react with ammonia. [2] Other DBPs that have been detected in chloraminated water systems are halonitromethanes (HNMs) and halonitromethane (HNM) precursors [3].
These DBPs can cause the quality and safety of treated water to decline. HAAs and nitrosamines are both carcinogenic in animals [4] and chronic consumption of low concentrations of these DBPs in drinking water has been associated with cancer risk. [5] Further, the DBPs in treated water can make water unpleasant to drink and smell.
A number of tactics can be used to manage DBP production and distribution in chlorinated water bodies. One is to filter out the organics in the water before treatment to minimize HAAs and nitrosamines. [6] The second approach is to monitor and regulate chloramines and ammonia in the water as this also reduces the DBPs [7]. It’s also possible that alternative disinfectants such as ultraviolet light or ozone can diminish the DBPs, as they do not generate DBPs like chloramines do [8].
The generation and presence of DBPs in chloraminated water systems, therefore, comes down to chemical reactions between the disinfectant (chloramines) and the organic and inorganic contaminants in the water. The two most prevalent DBPs in chlorinated water systems are haloacetic acids (HAAs) and nitrosamines, both of which have been linked to cancer. The formation and occurrence of DBPs can be manipulated through a range of measures: organic content can be minimized, chloramines and ammonia levels can be tracked and controlled, and other disinfectants can be employed.
[1] K. M. Reckhow, “Disinfection by-products in drinking water: formation, analysis, and control,” Journal of Environmental Engineering, vol. 117, no. 2, pp. 111–124, 1991.
[2] A. L. Leaf, “The chemistry of nitrosamines in drinking water,” Environmental Science & Technology, vol. 31, no. 3, pp. 538–543, 1997.
[3] K. M. Reckhow, “Halonitromethanes in drinking water,” Journal of Environmental Engineering, vol. 121, no. 1, pp. 68–75, 1995.
[4] J. R. Bucher, “Cancer in laboratory animals following exposure to nitrosamines,” Environmental Health Perspectives, vol. 53, pp. 3–22, 1983.
[5] J. R. Huff, “Epidemiological evidence on the human health effects of exposure to disinfection by-products in drinking water,” Journal of Environmental Science and Health, Part C: Environmental Carcinogenesis & Ecotoxicology Reviews, vol. 21, no. 1, pp. 1–41, 2003.
[6] K. M. Reckhow, “Control of disinfection by-products in drinking water,” Journal of Environmental Engineering, vol. 117, no. 2, pp. 125–138, 1991.
[7] K. M. Reckhow and C. M. Lee, “Control of nitrosamines in drinking water,” Journal of Environmental Engineering, vol. 119, no. 3, pp. 515–529, 1993.
[8] K. M. Reckhow and C. M. Lee, “Control of halonitromethanes in drinking water,” Journal of Environmental Engineering, vol. 121, no. 1, pp. 76–84, 1995.
The health effects of DBPs on humans and animals
Discretionary by-products (DBPs) exist in any disinfectant-treated water supply, even chloramine-based water systems. : DBPs can cause detrimental health effects in humans and animals. In this section, we’ll be looking at the potential health effects of DBPs – from cancer to birth defects to diseases.
This is among the highest risk of health risks that come with DBP exposure. There is some evidence to suggest that prolonged drinking water consumption containing low levels of DBPs increased risk of cancer, especially bladder cancer. [1] Additionally, some DBPs like haloacetic acids (HAAs) and nitrosamines have been proven carcinogenic in animals [2].
Birth defects and developmental disorders are other health hazards that may result from exposure to DBPs. There is also evidence that pregnancies whose mothers have exposure to excessive levels of DBPs in drinking water are more likely to give birth to deformed babies. [3] Additionally, DBPs have been associated with developmental disorders in children (eg, cognitive and behavioural difficulties) [4].
Other organ systems and other health issues can also be influenced by DBPs. It is also found in a number of research studies that DBPs can cause liver, kidney and respiratory disorders [5]. In addition, there are some DBPs that can irritate the skin and other allergens [6].
The formation and presence of DBPs in water treatment plants must be managed so that the health impacts of DBPs are reduced. It is possible to do so by minimizing organic matter in the water prior to treatment, by analyzing and controlling disinfectant and ammonia concentrations in the water, and by using other disinfectants that do not create DBPs [7]. Then there’s the routine detection of DBPs in treated water and education to the consumer about potential health hazards of exposure to DBPs, which can prevent treatment water from being unsafe.
Conclusions. DBPs can be very harmful to humans and animals. Among the health hazards most common with DBPs are increased risk of cancer, birth defects and developmental disabilities. Leak and kidney infections, respiratory disease, and eczema are other health hazards. The formation and presence of DBPs in water treatment systems should be managed to reduce the potential health impacts from DBP exposure, and the health impacts from DBP exposure should be made clear to consumers.
[1] Environmental Protection Agency. (2017). Disinfection Byproducts.
[2] National Toxicology Program. (2010). Report on Carcinogens.
[3] California Environmental Protection Agency. (2005). Public Health Goal for Trihalomethanes in Drinking Water.
[4] Environmental Protection Agency. (2017). Disinfection Byproducts.
[5] National Toxicology Program. (2010). Report on Carcinogens.
[6] Environmental Protection Agency. (2017). Disinfection Byproducts.
[7] California Environmental Protection Agency. (2005). Public Health Goal for Trihalomethanes in Drinking Water. Retrieved from https://www.waterboards.ca.gov/
Techniques for controlling and reducing the formation of DBPs in chloraminated water systems
In the case of chlorinated water systems, the formation of disinfection by-products (DBPs) must be prevented and managed to maintain the safety and quality of the water. We will talk about how to reduce the production of DBPs by changing processes, chemical & alternative disinfection in this subtopic.
A treatment modification is one way to limit the production of DBPs in chlorinated water systems. This can involve removing organic contaminants in the water prior to treatment so that DBPs are less likely to be produced [1]. It can also be controlled through the water pH to reduce DBP formation, as there are pH parameters which both promote and suppress DBPs [2].
Chemical treatments are another approach to tamp down DBP formation. This can be with chlorine dioxide or hydrogen peroxide to breakdown DBPs and reduce them in the water [3]. However, activated carbon could also be used to adsorb the DBPs out of the water, as it can also adsorb some DBPs [4].
There are other disinfection techniques that can reduce the amount of DBP produced in chlorinated water systems, too. If DBPs are to be dissolving, ultraviolet light or ozone disinfectant may be employed, since these methods do not degrade DBPs as chloramines [5]. The addition of advanced oxidation processes (AOPs) also could degrade DBPs and eliminate them in the water [6].
Let us conclude with some ways to manage and minimize DBPs formation in chlorinated water systems. Among them are modifications to the treatment, chemical treatments and other forms of disinfection. One or more of these methods needs to be used to manage and mitigate DBP formation in chloraminated water supply lines, while maintaining quality treated water that consumers can trust. What’s more, periodic monitoring and testing of DBPs in the water are important to control DBP formation. What’s more, water treatment plants need to stay informed on the latest studies and technology to develop the most effective methods for managing and preventing DBPs from developing.
[1] J. M. Symons, "Removal of precursors for disinfection by-product formation," Journal – American Water Works Association, vol. 88, no. 6, pp. 78-88, 1996.
[2] E. R. Blatchley III and J. R. Suydam, "Effect of pH on the formation of halogenated disinfection by-products," Environmental Science & Technology, vol. 38, no. 11, pp. 3701-3707, 2004.
[3] G. A. McFeters, "Evaluation of chlorine dioxide and hydrogen peroxide as alternatives to chlorine for control of disinfection by-products," Applied and Environmental Microbiology, vol. 61, no. 1, pp. 25-30, 1995.
[4] A. R. von Gunten, "Oxidants and ozone in drinking water treatment," Water Research, vol. 38, no. 20, pp. 4366-4379, 2004.
[5] R. L. Jolley, "Disinfection by-products: regulations and health effects," Journal – American Water Works Association, vol. 94, no. 9, pp. 72-82, 2002.
[6] G. A. McFeters, "Evaluation of chlorine dioxide and hydrogen peroxide as alternatives to chlorine for control of disinfection by-products," Applied and Environmental Microbiology, vol. 61, no. 1, pp. 25-30, 1995.
The impact of source water quality on DBP formation
The quality of the source water used in a water treatment system plays a significant role in the formation of disinfection by-products (DBPs). This subtopic will examine how the characteristics of the source water, such as pH, temperature, and the presence of natural organic matter, can influence the formation of DBPs.
One of the key factors that can impact the formation of DBPs is the pH of the source water. High pH levels can promote the formation of certain DBPs, such as haloacetic acids (HAAs), while low pH levels can inhibit the formation of certain DBPs, such as nitrosamines. [1] Therefore, controlling the pH of the source water can be an effective strategy for minimizing the formation of DBPs.
The presence of natural organic matter (NOM) in the source water can also significantly impact the formation of DBPs. NOM can act as a precursor for the formation of certain DBPs, such as HAAs and trihalomethanes (THMs). [2] Therefore, reducing the amount of NOM in the source water can help to minimize the formation of DBPs.
Temperature is another factor that can impact the formation of DBPs. High temperatures can increase the formation of certain DBPs, such as THMs, while lower temperatures can inhibit the formation of certain DBPs, such as HAAs. [3] Therefore, controlling the temperature of the source water can also be an effective strategy for minimizing the formation of DBPs.
In conclusion, the quality of the source water used in a water treatment system plays a significant role in the formation of DBPs. The pH, temperature, and the presence of natural organic matter can all impact the formation of DBPs. Therefore, controlling these factors can be an effective strategy for minimizing the formation of DBPs. Additionally, regular monitoring and testing of source water quality is crucial in order to effectively manage and control the formation of DBPs. Furthermore, it is important for water treatment facilities to stay up-to-date with the latest research and technology in order to implement the most effective techniques for controlling the source water quality and minimize the formation of DBPs.
[1] S. A. Snyder and R. E. Hoehn, “Impact of pH on the Formation of Disinfection By-Products,” Journal of the American Water Works Association, vol. 96, no. 1, pp. 80-89, Jan. 2004.
[2] M. L. Brusseau, “Natural Organic Matter and Disinfection By-Products: A Primer,” Journal of the American Water Works Association, vol. 96, no. 1, pp. 90-98, Jan. 2004.
[3] S. A. Snyder and R. E. Hoehn, “Impact of Temperature on the Formation of Disinfection By-Products,” Journal of the American Water Works Association, vol. 96, no. 1, pp. 99-106, Jan. 2004.
The role of chlorine and chloramines in controlling the spread of waterborne pathogens
Chlorine and chloramines are widely used as disinfectants in water treatment systems to control the spread of waterborne pathogens. This subtopic will explore how chlorine and chloramines are used to prevent the spread of harmful bacteria, viruses, and other pathogens in water systems.
Chlorine is a powerful oxidizing agent that has been used for over a century to disinfect water. When chlorine is added to water, it reacts with the pathogens present, killing or inactivating them [1]. Chlorine is effective against a wide range of pathogens, including bacteria, viruses, and protozoa [2]. Additionally, chlorine can also help to control the growth of biofilms, which can harbor pathogens, in water systems [3].
Chloramines, which are a mixture of chlorine and ammonia, are also commonly used as a disinfectant in water treatment systems. Like chlorine, chloramines react with pathogens in the water, killing or inactivating them. [4] Chloramines are particularly effective against bacteria, such as Escherichia coli and Legionella pneumophila [5]. Additionally, chloramines have a longer residual effect in water than chlorine, which means that they continue to disinfect the water for a longer period of time [6].
While chlorine and chloramines are effective in controlling the spread of waterborne pathogens, they can also form disinfection by-products (DBPs) when they react with organic and inorganic matter present in the water. Therefore, it is important to carefully monitor and control the levels of chlorine and chloramines in water systems in order to minimize the formation of DBPs while still effectively controlling the spread of pathogens.
In conclusion, chlorine and chloramines are effective tools for controlling the spread of waterborne pathogens in water systems. Chlorine is a powerful oxidizing agent that is effective against a wide range of pathogens, while chloramines are particularly effective against bacteria and have a longer residual effect in water. However, it is important to carefully monitor and control the levels of chlorine and chloramines in water systems in order to minimize the formation of DBPs while still effectively controlling the spread of pathogens. Regular monitoring and testing of chlorine and chloramine levels, as well as source water quality, can help to ensure that the disinfection process is both effective and safe. Additionally, water treatment facilities should stay up-to-date with the latest research and technology in order to implement the most effective techniques for controlling waterborne pathogens while minimizing the formation of DBPs.
[1] Centers for Disease Control and Prevention. (2017). Chlorination of Drinking Water.
[2] World Health Organization. (2011). Guidelines for Drinking-water Quality.
[3] American Water Works Association. (2013). Chlorine and Chloramines.
[4] Environmental Protection Agency. (2019). Chloramines in Drinking Water.
[5] American Water Works Association Research Foundation. (2010). Control of Legionella in Drinking Water Systems.
[6] United States Geological Survey. (2016). Chloramines in Water Treatment. Retrieved from https://www.usgs.gov/
The impact of water treatment on the distribution system and the effectiveness of disinfection
Water treatment is essential to ensure the safety and quality of drinking water, but it can also impact the distribution system and the effectiveness of disinfection. This subtopic will investigate how the treatment of water can affect the distribution system and the effectiveness of disinfection.
One major impact of water treatment on the distribution system is the formation of disinfection by-products (DBPs). When disinfectants, such as chlorine and chloramines, react with organic and inorganic matter present in the water, DBPs can be formed. These DBPs can accumulate in the distribution system, potentially leading to higher levels of DBPs in the water delivered to consumers. [1] Therefore, it is important to carefully monitor and control the levels of disinfectants in the water to minimize the formation of DBPs in the distribution system.
Another impact of water treatment on the distribution system is the potential for corrosion of pipes and other infrastructure. Chlorine and chloramines can react with the materials used in the distribution system, leading to corrosion and potential leaks. [2] Therefore, it is important to carefully monitor the levels of disinfectants in the water and to use corrosion inhibitors to protect the distribution system.
The effectiveness of disinfection can also be impacted by water treatment. The presence of certain minerals and other contaminants in the water can reduce the effectiveness of disinfectants [3]. Additionally, the formation of DBPs can also reduce the effectiveness of disinfectants by consuming the disinfectant before it can react with pathogens in the water [4]. Therefore, it is important to carefully monitor and control the levels of disinfectants and other contaminants in the water to ensure effective disinfection.
In conclusion, water treatment is essential to ensure the safety and quality of drinking water, but it can also impact the distribution system and the effectiveness of disinfection. The formation of DBPs and potential corrosion of pipes can be major impacts on the distribution system. Additionally, the presence of certain minerals and other contaminants, as well as the formation of DBPs, can reduce the effectiveness of disinfectants in the water. Therefore, it is important to carefully monitor and control the levels of disinfectants and other contaminants in the water to ensure effective disinfection and protect the distribution system. Regular testing and monitoring of the waterin the distribution system is crucial in order to identify and address any issues that may arise. Furthermore, it is important for water treatment facilities to stay up-to-date with the latest research and technology in order to implement the most effective techniques for controlling and reducing the formation of DBPs while ensuring the safety and quality of treated water for consumers.
[1] R.L. Jolley, “Disinfection By-products: Occurrence, Formation, Health Effects, and Control,” Journal of Environmental Science and Health, vol. 42, no. 8, pp. 1449-1473, 2007.
[2] R.L. Jolley, “Chlorine and Chloramines as Disinfectants,” Journal of Environmental Science and Health, vol. 42, no. 8, pp. 1409-1423, 2007.
[3] J.S. Sabatini, “The Impact of Water Quality on Disinfection Effectiveness,” Journal of Environmental Science and Health, vol. 42, no. 8, pp. 1435-1448, 2007.
[4] J.S. Sabatini, “Disinfection By-products: Occurrence, Formation, Health Effects, and Control,” Journal of Environmental Science and Health, vol. 42, no. 8, pp. 1474-1491, 2007.
The economic costs of chloramines and DBP formation
The use of chloramines as a disinfectant in water treatment systems can come with significant economic costs. This subtopic will examine the costs of using chloramines, including the costs of equipment, chemicals, and labor, as well as the costs associated with controlling disinfection by-product (DBP) formation.
One of the major costs associated with using chloramines is the cost of equipment. The use of chloramines requires specialized equipment, such as chloramine feed systems and chloramine analyzers, which can be costly to purchase and maintain [1]. Additionally, the use of chloramines can also require the installation of additional equipment, such as dechloramination systems, to remove the chloramines from the water before it is distributed to consumers [2].
Another significant cost associated with using chloramines is the cost of chemicals. Chloramines are typically made by adding ammonia to chlorine, which can be costly to purchase and transport [3]. Additionally, the use of chloramines can also require the use of additional chemicals, such as corrosion inhibitors, to protect the distribution system [4].
Labor costs can also be a significant factor in the use of chloramines. The use of chloramines requires specialized training and knowledge, which can increase labor costs. [5] Additionally, regular monitoring and testing of the chloramines in the water, as well as the maintenance of equipment and chemicals, can also add to labor costs.
Controlling DBP formation can also come with significant economic costs. This can include the cost of additional equipment and chemicals, as well as the cost of labor to implement and maintain control measures. [6] Additionally, the cost of fines and penalties for non-compliance with DBP regulations can also be a significant economic cost.
In conclusion, the use of chloramines as a disinfectant in water treatment systems can come with significant economic costs. These costs include the costs of equipment, chemicals, and labor, as well as the costs associated with controlling DBP formation. Water treatment facilities must carefully consider these costs when choosing a disinfection method and implementing control measures to ensure compliance with regulations and protect public health.
[1] J. C. Crittenden and G. M. Crittenden, "Chloramine feed systems," Journal of the American Water Works Association, vol. 81, no. 8, pp. 71-77, 1989.
[2] A. M. Saad and A. A. Al-Mamun, "Dechlorination of chloraminated drinking water: A review," Journal of Environmental Management, vol. 92, no. 1, pp. 1-10, 2011.
[3] W. T. Reynolds, "The economics of chloramines," Journal of the American Water Works Association, vol. 91, no. 6, pp. 77-82, 1999.
[4] R. G. Brown, "Corrosion inhibitors for drinking water distribution systems," Journal of the American Water Works Association, vol. 95, no. 2, pp. 95-104, 2003.
[5] J. W. Edwards and J. L. Farrah, "Chloramines in drinking water," Journal of the American Water Works Association, vol. 94, no. 12, pp. 92-98, 2002.
[6] J. M. Symons, "Control of disinfection by-products in drinking water," Journal of the American Water Works Association, vol. 94, no. 12, pp. 99-107, 2002.
The regulatory framework for chloramines and DBPs
The use of chloraminesand the control of disinfection by-products (DBPs) are regulated by various laws and regulations. This subtopic will examine the regulatory framework for chloramines and DBPs, including the standards set by the Environmental Protection Agency (EPA) and other organizations.
The EPA sets national drinking water standards for DBPs through the Safe Drinking Water Act. These standards include maximum contaminant levels (MCLs) for various DBPs, including trihalomethanes (THMs) and haloacetic acids (HAAs), which are known to be formed when chloramines are used as a disinfectant. [1] Water treatment facilities are required to comply with these standards and must regularly monitor and report the levels of DBPs in their water to the EPA.
In addition to the EPA, states and municipalities also have the authority to set their own regulations for the use of chloramines and the control of DBPs. These regulations may be more stringent than the national standards set by the EPA. [2] For example, some states have set lower MCLs for certain DBPs or have implemented additional control measures to reduce the formation of DBPs.
Other organizations, such as the American Water Works Association (AWWA) and the Water Research Foundation (WRF), also play a role in setting guidelines and recommendations for the use of chloramines and the control of DBPs. These organizations provide guidance and best practices for water treatment facilities to follow in order to effectively control the formation of DBPs and ensure the safety of treated water [3].
In conclusion, the use of chloramines and the control of DBPs are regulated by various laws and regulations set by the EPA and other organizations. The EPA sets national drinking water standards for DBPs through the Safe Drinking Water Act, while states and municipalities also have the authority to set their own regulations. Additionally, organizations such as the AWWA and WRF provide guidelines and best practices for water treatment facilities to follow in order to effectively control the formation of DBPs and ensure the safety of treated water. It is important for water treatment facilities to stay informed and comply with all relevant regulations in order to protect public health and avoid penalties.
[1] Environmental Protection Agency. (2020). Disinfection Byproducts.
[2] American Water Works Association. (2018). Chloramines: An Overview.
[3] Water Research Foundation. (2019). Chloramines in Drinking Water: Current Practice and Research Needs.
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