Can backwash from the filter system on a storage lake or impoundment be discharged?

Backwash water from a filter system is considered to be wastewater and must be properly disposed. Proper disposal methods include sending the backwash water to a sewer system or using the backwash water for surface irrigation at the reuse site. A permit issued by the sewer utility company may be required to discharge the backwash water to the sewer system.

Backwash water may not be discharged to a drywell (for example, a storm water retention basin drywell) unless an Aquifer Protection Permit has been obtained from the Arizona Department of Environmental Quality permitting such disposal. Other backwash water disposal alternatives will be considered on a case-by-case basis. For more information, please call 602-372-2861.

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1. Does reclaimed water have to be disinfected?
2. Can a reclaimed water storage lake or reservoir be uncovered?
3. What are the identification requirements for pipes, valves and other equipment in reclaimed water service?
4. What are the signage requirements for reclaimed water facilities or reuse irrigation systems?
5. Can backwash from the filter system on a storage lake or impoundment be discharged?
6. Can reclaimed water be discharged to a dry well?
7. Can reclaimed water be discharged to the waters of the United States?
8. What is the minimum thickness for reclaimed water storage lake liner?