ANSI AWWA G481-14:2020 pdf download.Reclaimed Water Program Operation and Management
4.4.2 Treatment plan. Treatment process selection and application should be compliant with any specified treatment process required by state regulations in the state where the project is located.
4.4.3 Disinfection. Providing adequate disinfection is considered one of the critical steps in developing a successful reclaimed water program. Disinfection requirements will vary depending on the specific reuse application. A disinfection program that meets the regulatory quality for each reclaimed water use identified in the local ordinance, and that protects the public health and safety, shall be developed, implemented, and maintained.
4.4.4 Water quality. In addition to meeting applicable regulations and operational performance goals, the reclaimed water should be suitable for the intended use. This may require treatment and monitoring of constituents not associated with public health concerns. Examples include levels of total dissolved solids as they relate to the ability to use reclaimed water for irrigation or for certain industrial applications, and nutrient levels as they relate to the promotion of algal growth in surface water augmentation applications.
4.4.5 Monitoring, sampling, and testing. Reclaimed water samples shall be collected and analyzed for compliance with minimum water quality standards for the identified quality of reclaimed water use. The water quality results should be monitored for trends that may indicate future noncompliance. A plan to respond to nonconformance should be developed that shall include who will develop nonconformance corrective action plans and requirements for additional analysis or increasing system sampling and monitoring frequency when there is significant or recurring nonconformance.
4.5.5 Backflow and cross-connection control. The purveyor shall develop, document, and maintain a backflow and cross-connection control program. The program shall include isolation and containment strategies to protect the potable water supply against cross-connections with nonpotable supplies. Testing of devices should be done at least annually or as required by local ordinances. Where the purveyor of reclaimed water is different from the purveyor of potable water, the reclaimed water utility will coordinate with the potable water utility or appropriate regulating entity to ensure compliance with regulatory requirements pertaining to their jurisdiction. Purveyors of potable water and reclaimed water should coordinate their backflow and cross-connection control program with local building and plumbing code officials that have jurisdiction for plumbing and construction on private property and with state or provincial and local public health officials having jurisdiction over cross-connection control programs.ANSI AWWA G481-14 pdf download.