| #Q001 | treatment | health | mandatory | Disinfection Effectiveness | drinking water | Efforts to limit the concentration and/or formation of bromate must not compromise the effectiveness of disinfection. | | high |
| #Q002 | administrative | operational | recommended | Purchase Certified Hypochlorite Solutions | drinking water | Purchase hypochlorite solutions that are certified as meeting NSF International (NSF) /American National Standards Institute (ANSI) Standard 60 for the maximum use level (MUL) of 10 mg Cl2/L and that have minimum handling and storage time between product manufacturing and delivery dates. | For facilities using hypochlorite solutions | high |
| #Q003 | operational | operational | recommended | Use Certified Low-Bromide Salt | drinking water | For water utilities using on-site systems for the generation of hypochlorite, use a low-bromide salt that is certified as meeting NSF/ANSI Standard 60. | For water utilities using on-site systems for the generation of hypochlorite | high |
| #Q004 | operational | operational | recommended | Hypochlorite Handling and Storage | drinking water | Follow the handling and storage recommendations outlined in Appendix B. | For facilities using hypochlorite solutions | high |
| #Q005 | administrative | operational | recommended | Quality Control Program for Solutions | drinking water | Establish a quality control program to verify product quality and manage solution storage. | For facilities using hypochlorite solutions | high |
| #Q006 | administrative | health | recommended | Implementation of Risk Management Approach | drinking water | All water utilities should implement a risk management approach such as the source-to-tap multi-barrier approach or water safety plan approach. | | high |
| #Q007 | operational | operational | mandatory | Operator Training Requirement | drinking water | Operator training is also required to ensure the effectiveness of the water safety plan at all times. | | high |
| #Q008 | monitoring | reporting | recommended | Focus on Ozonation and Hypochlorite Sources | drinking water | Since ozonation of bromide-containing waters and the use of hypochlorite solutions are currently considered the primary sources of bromate in drinking water, monitoring should focus on these processes. | | high |
| #Q009 | monitoring | operational | recommended | Source Water Characterization for Ozonation | drinking water | Water utilities using ozone should characterize their source water to assess water quality parameters (i.e., bromide, temperature, pH, alkalinity, natural organic matter, ammonia) as well as how these change on a seasonal basis. | For utilities using ozone | high |
| #Q010 | monitoring | reporting | recommended | Quarterly Raw Water Bromide Monitoring | drinking water | Quarterly monitoring of raw water bromide is recommended to characterize the source water and allow correlation to bromate (and brominated disinfection by-products). | | high |
| #Q011 | monitoring | operational | mandatory | Process Control Monitoring for Ozone Facilities | drinking water | Therefore, for facilities using ozone, parameters such as ozone, alkalinity, temperature and pH require more frequent process control monitoring. | For facilities using ozone | high |
| #Q012 | monitoring | operational | mandatory | Process Monitoring for Hypochlorite Facilities | drinking water | For facilities using hypochlorite solutions, process monitoring is also required to ensure water is adequately disinfected and disinfection by-product formation is minimized. | For facilities using hypochlorite solutions | high |
| #Q013 | administrative | operational | mandatory | Hypochlorite Solution Purchasing and Handling Procedures | drinking water | Procedures regarding the purchasing, handling and storage of hypochlorite solutions are also required to minimize the bromate concentration in the treated water. | For facilities using hypochlorite solutions | high |
| #Q014 | monitoring | reporting | recommended | Quarterly Compliance Monitoring | drinking water | At a minimum, quarterly monitoring of treated water from surface water and groundwater sources is recommended at facilities using ozone or hypochlorite solutions to verify that the MAC is being achieved. | At facilities using ozone or hypochlorite solutions | high |
| #Q015 | monitoring | reporting | recommended | Sampling for Re-chlorination Stations | drinking water | In systems with re-chlorination stations using hypochlorite solutions, quarterly samples should also be collected where re-chlorinated water enters the distribution system. | Systems with re-chlorination stations using hypochlorite solutions | high |
| #Q016 | monitoring | reporting | recommended | Sampling Frequency for Hypochlorite Solutions | drinking water | For facilities using hypochlorite solutions, the sampling frequency should be representative of the "worst-case" scenario. | For facilities using hypochlorite solutions | high |
| #Q017 | monitoring | reporting | recommended | Sample Collection Protocol | drinking water | Samples should be collected in precleaned opaque plastic or amber glass bottles containing the appropriate quenching agent for the analytical method. | | high |
| #Q018 | monitoring | reporting | recommended | Sample Pretreatment for Chloride Interference | drinking water | Sample pretreatment methods should remove high concentrations of chloride, which may interfere with bromate measurement. | | high |
| #Q019 | administrative | reporting | recommended | Discuss Sampling Requirements with Accredited Laboratory | drinking water | Water utilities should discuss sampling requirements with the accredited laboratory conducting the analysis to ensure that quality control procedures are met and that MDLs/MRLs are low enough to ensure accurate monitoring at concentrations below the MAC. | | high |
| #Q020 | administrative | reporting | recommended | Establish Analytical Performance Measures | drinking water | Water utilities should establish performance measures when specifying which analytical method to use (i.e., sample volume, sampling requirements, sample preservation and storage, MDL). | | high |
| #Q021 | treatment | health | recommended | Disinfection and Maintenance of Disinfectant Residual | drinking water | In general, all water supplies should be disinfected, and an adequate concentration of disinfectant residual should be maintained throughout the distribution system at all times. | | high |
| #Q022 | operational | operational | recommended | Understanding Source Water Characteristics and Seasonality | drinking water | Water utilities should have a good understanding of the sources and concentration of bromide in their source waters and the seasonal variability of water quality parameters that may affect the formation of bromate or other DBPs as described in Section 7.3. | | high |
| #Q023 | operational | health | mandatory | Ensure Disinfection Not Compromised | drinking water | Process optimization to reduce the formation of DBPs, including bromate, must not compromise the effectiveness of disinfection. | During process optimization | high |
| #Q024 | administrative | health | recommended | Purchase NSF/ANSI Standard 60 Certified Hypochlorite | drinking water | To minimize the amount of bromate added to treated water, utilities should purchase hypochlorite treatment chemicals that are certified as meeting NSF/ANSI Standard 60 for the MUL of 10 mg Cl2/L (NSF/ANSI, 2016) and have minimum handling and storage time between product manufacturing and product delivery. | | high |
| #Q025 | administrative | operational | recommended | Quality Control Program Verification | drinking water | It is recommended that water utilities establish a quality control program to verify product quality and manage solution storage. | | high |
| #Q026 | monitoring | operational | recommended | Identify Natural and Anthropogenic Sources of Bromide | drinking water | Water utilities should identify natural and anthropogenic sources of bromide by adequately characterizing their source water. | | high |
| #Q027 | administrative | reporting | recommended | Ensure MRL is Low Enough | drinking water | Water utilities should ensure that the MRL is low enough for their purposes when specifying which analytical method to use | | high |
| #Q028 | operational | operational | recommended | Optimize O3 Dose for Seasonal Changes | drinking water | Water utilities should be aware of seasonal changes to optimize the applied O3 dose at all times while minimizing the formation of bromate and other DBPs. | For utilities using ozone | high |
| #Q029 | monitoring | operational | recommended | Monitor Water Quality, O3 and Energy Consumption | drinking water | Water quality, O3 consumption and energy consumption should be monitored to ensure that treatment objectives are met. | For utilities using ozone | high |
| #Q030 | operational | operational | recommended | Adjust Water Quality Goals for Seasonal Temperature Changes | drinking water | As water utilities cannot adjust the temperature during water treatment, they should be aware of seasonal changes and how their process responds for bromate and other DBP formation, so that they can adjust their water quality goals accordingly | | high |
| #Q031 | treatment | treatment | guidance | H2O2 Addition Advisory | drinking water | If treatment objectives include both advanced oxidation and disinfection, H2O2 addition is not recommended | If treatment objectives include both advanced oxidation and disinfection | high |
| #Q032 | design | operational | recommended | Bench- or Pilot-Scale Testing Prior to Ozonation | drinking water | Bench- or pilot-scale testing is recommended prior to selecting ozonation to ensure it is the most appropriate solution with respect to water quality characteristics, treatment objectives and bromate formation. | | high |
| #Q033 | operational | health | recommended | Household Precautions for Hypochlorite Solutions | drinking water | The precautions outlined in Section 7.2.2 should be followed when individual households use hypochlorite solutions as the source of chlorine to disinfect their water. | For individual households using hypochlorite solutions as the source of chlorine to disinfect their water | high |
| #Q034 | design | health | recommended | Use Certified Residential Treatment Devices | drinking water | ...it strongly recommends that consumers use devices that have been certified by an accredited certification body as meeting the appropriate NSF/ANSI drinking water treatment unit standards. | For residential scale treatment | high |
| #Q035 | design | operational | recommended | Point-of-Use Installation for Residential Devices | drinking water | Therefore, these devices should be installed only at the point of use. | For reverse osmosis and distillation devices | high |
| #Q036 | monitoring | reporting | recommended | Periodic Testing for Residential Devices | drinking water | Periodic testing by an accredited laboratory should be conducted on both the water entering the treatment device and the finished water to verify that the treatment device is effective. | For residential scale treatment devices | high |
| #Q037 | operational | operational | recommended | Verify Longevity and Maintain Residential Components | drinking water | Consumers should verify the expected longevity of the components in their treatment device according to the manufacturer's recommendations and service it when required. | For residential scale treatment devices | high |
| #Q038 | operational | operational | recommended | Dilute Hypochlorite Solutions | drinking water | Dilute stored hypochlorite solutions upon delivery | For handling and storage of hypochlorite solutions | high |
| #Q039 | operational | operational | recommended | Store Hypochlorite at Lower Temperatures | drinking water | Store the hypochlorite solutions at lower temperatures | For handling and storage of hypochlorite solutions | high |
| #Q040 | operational | operational | recommended | Control pH of Hypochlorite Solutions | drinking water | Control the pH of stored hypochlorite solutions at pH 11−13 even after dilution | For handling and storage of hypochlorite solutions | high |
| #Q041 | administrative | operational | recommended | Control Transition Metal Ions in Hypochlorite | drinking water | Control the removal of transition metal ions by purchasing filtered hypochlorite solutions and by using low-metal ion concentration feed water for the OSG systems and dilution water | For handling and storage of hypochlorite solutions | high |
| #Q042 | operational | operational | recommended | Use Fresh Hypochlorite Solutions | drinking water | Use fresh hypochlorite solutions when possible | For handling and storage of hypochlorite solutions | high |
| #Q043 | operational | operational | recommended | Use Low-Bromide Salt for OSG Hypochlorite | drinking water | For utilities using OSG hypochlorite, use a low-bromide salt to minimize the amount of bromide present in the brine | For utilities using OSG hypochlorite | high |
| #Q044 | monitoring | reporting | recommended | Bromate Analytical Reporting Limit | drinking water | The analytical method used to measure bromate concentrations should have a reporting limit of 0.005 mg/L (5 µg/L) or less. | For facilities using ozone | high |
| #Q045 | monitoring | operational | guideline | Monitor Brine Water Bromide | drinking water | For facilities generating hypochlorite on-site, it important to know the bromide concentration in the water used for the brine as this affects the amount of bromate that can be generated in the hypochlorite solution and subsequently added to the treated water. | For facilities generating hypochlorite on-site | high |
| #Q046 | monitoring | operational | guideline | Verify Available Chlorine in Hypochlorite | drinking water | It is also important to verify the available chlorine in hypochlorite solutions as this concentration affects the chlorine dose required to achieve disinfection targets and, by association, the bromate concentration in the treated water. | For facilities using hypochlorite solutions | high |
| #Q047 | operational | operational | recommended | Adjust Treatment Goals for Water Quality Changes | drinking water | As such, water utilities should be aware of how their process responds to water quality changes and adjust their treatment goals accordingly to optimize their process and minimize bromate formation. | | high |
| #Q048 | administrative | operational | guideline | Maximum Anticipated Dose Consideration in Purchasing | drinking water | Thus, it is important that water utilities consider the maximum anticipated dose at their facilities when purchasing hypochlorite solutions to ensure that the product MUL can achieve this anticipated maximum dose (ANSI/AWWA, 2010). | When purchasing hypochlorite solutions | high |
| #Q049 | administrative | operational | recommended | Jurisdictional Guidance | drinking water | Specific guidance related to the implementation of drinking water guidelines should be obtained from the appropriate drinking water authority in the affected jurisdiction. | | high |
| #Q050 | operational | operational | mandatory | Consider Treatment Trade-offs | drinking water | Water utilities must consider the trade-offs when implementing these control strategies [pH depression, ammonia or chlorine-ammonia addition], as outlined in Sections 7.3.4 and 7.3.7. | When implementing bromate control strategies | high |
| #Q051 | operational | operational | mandatory | Consider Water Quality for Ammonia Addition | drinking water | As increased pH affects disinfection targets, water utilities must consider water quality characteristics when implementing ammonia addition as a control strategy. | When implementing ammonia addition for bromate control | high |
| #Q052 | operational | operational | recommended | Store Hypochlorite Out of Sunlight | drinking water | To minimize temperature increases, the product should be stored out of direct sunlight. | Storage of hypochlorite solutions | high |
| #Q053 | operational | operational | recommended | Hypochlorite Stock Rotation | drinking water | Rotate stock and minimize the quantity of aged product in storage tanks prior to the delivery of new product. | Storage of hypochlorite solutions | high |
| #Q054 | monitoring | operational | recommended | Rainwater and Snowmelt Bromide Testing | drinking water | Water sources that are highly dependent on rainwater or snowmelt should also be tested to determine the bromide concentration in raw water, particularly if drinking water is disinfected using ozonation or chlorination, because of the potential to form bromate or chlorination DBPs, respectively. | Water sources highly dependent on rainwater or snowmelt | high |
| #Q055 | operational | operational | recommended | OSG Hypochlorite Storage Duration | drinking water | Given the typical pH range of on-site generation (OSG) hypochlorite (pH 9−10), such solutions should be used as soon as possible after manufacture and should not be stored for more than 1−2 days. | For utilities using on-site generated (OSG) hypochlorite | high |
| #Q056 | administrative | operational | recommended | Manufacturer pH Specification Verification | drinking water | utilities should continue to insist that manufacturer specifications include pH control in the range of 11−13. | When purchasing hypochlorite solutions | high |
| #Q057 | design | health | recommended | Residential Treatment Standards | drinking water | it is recommended that drinking water treatment devices certified as meeting NSF/ANSI Standard 58 (Reverse Osmosis Drinking Water Treatment Systems), NSF/ANSI Standard 62 (Drinking Water Distillation Systems) or NSF/ANSI Standard 53 (Drinking Water Treatment Units – Health Effects) be used. | For residential scale treatment | high |
| #Q058 | operational | operational | recommended | Optimize System Operation for Ozone Dose | drinking water | The goal for optimized system operation should be to meet treatment objectives with the lowest possible ozone dose. | For facilities using ozone | high |
| #Q059 | operational | operational | guidance | Determine Ozone Demand and Decay | drinking water | Determining the O3 demand and decay beforehand will help optimize the process. | Prior to ozonation treatment | high |
| #Q060 | operational | health | recommended | Consider Nitrogen-Containing DBP Formation | drinking water | The potential to form nitrogen-containing disinfection by-products should nonetheless be considered (Westerhoff, 2014). | When considering ammonia addition for bromate control | high |
| #Q061 | administrative | operational | mandatory | Water Safety Plan Validation Protocols | drinking water | Compliance monitoring is determined and other protocols to validate the water safety plan are implemented (e.g., record keeping, consumer satisfaction). | As part of the risk management or water safety plan approach | high |
| #Q062 | design | operational | recommended | Ozone Design Dose Determination | drinking water | the O3 design dose should be determined relative to treatment objectives (e.g., disinfection, taste and odour control, colour removal, etc.) and seasonal source water characteristics. | When designing or installing ozone treatment systems | high |
| #Q063 | design | operational | recommended | Ozone Dosing Location Establishment | drinking water | The location where O3 will be dosed (pre-ozonation or intermediate ozonation) should also be established as it relates to treatment objectives. | When designing or installing ozone treatment systems | high |
| #Q064 | operational | operational | recommended | Corrective Action and Incident Response Protocols | drinking water | Operational monitoring is then established and operational/management protocols, including corrective actions and incident responses, are instituted. | As part of implementing a risk management or water safety plan approach | high |