NSF 350-1-2017
- Onsite residential and commercial graywater treatment systems for subsurface discharge
- standard by NSF International, 12/01/2017
- Category: NSF
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This Standard contains minimum requirements for onsite residential and commercial greywater treatmentsystems. Systems may include:
— Greywater reuse treatment systems having a rated treatment capacity up to 5,678 L/d(1,500 gal/d): This applies to onsite residential and commercial reuse treatment systems that treatcombined greywater, those that treat laundry water only from residential laundry facilities, and those thattreat bathing water only. See 8.1 for performance testing and evaluation.
— Commercial greywater reuse treatment systems: This applies to onsite commercial reuse treatmentsystems that treat combined commercial facility greywater with capacities exceeding5,678 L/d (1,500 gal/d) and commercial facility laundry water only of any capacity. These systems shall beperformance tested and evaluated at the location of the reuse system installation, using the greywatergenerated onsite from the facility serving the treatment system. See 8.2 for performance testing andevaluation. The key elements of a field evaluation of a commercial onsite reuse treatment system aredescribed in Annex A.
The Standard is intended to address public health and environmental issues only. Actual performance for anysite or system may vary, depending on variations in raw water supply (such as in alkalinity and hardness),greywater constituents, and patterns of use. The end use of the effluent is the responsibility of the owner,design professionals, and regulatory officials.
Management methods and end uses appropriate for the treated effluent discharged from greywater residentialand commercial treatment systems meeting this Standard are limited to subsurface discharge to theenvironment only. Effluent quality criteria consistent with these uses are described in 8.5 ? Criteria.
System components covered under other NSF or NSF/ANSI standards or criteria shall also comply with therequirements therein. This Standard shall in no way restrict new system designs, provided such designs meetthe minimum specifications described herein.
— Greywater reuse treatment systems having a rated treatment capacity up to 5,678 L/d(1,500 gal/d): This applies to onsite residential and commercial reuse treatment systems that treatcombined greywater, those that treat laundry water only from residential laundry facilities, and those thattreat bathing water only. See 8.1 for performance testing and evaluation.
— Commercial greywater reuse treatment systems: This applies to onsite commercial reuse treatmentsystems that treat combined commercial facility greywater with capacities exceeding5,678 L/d (1,500 gal/d) and commercial facility laundry water only of any capacity. These systems shall beperformance tested and evaluated at the location of the reuse system installation, using the greywatergenerated onsite from the facility serving the treatment system. See 8.2 for performance testing andevaluation. The key elements of a field evaluation of a commercial onsite reuse treatment system aredescribed in Annex A.
The Standard is intended to address public health and environmental issues only. Actual performance for anysite or system may vary, depending on variations in raw water supply (such as in alkalinity and hardness),greywater constituents, and patterns of use. The end use of the effluent is the responsibility of the owner,design professionals, and regulatory officials.
Management methods and end uses appropriate for the treated effluent discharged from greywater residentialand commercial treatment systems meeting this Standard are limited to subsurface discharge to theenvironment only. Effluent quality criteria consistent with these uses are described in 8.5 ? Criteria.
System components covered under other NSF or NSF/ANSI standards or criteria shall also comply with therequirements therein. This Standard shall in no way restrict new system designs, provided such designs meetthe minimum specifications described herein.
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