Using Graywater and Stormwater to Enhance Local Water Supplies An Assessment of Risks, Costs, and Benefits (2016) / Chapter Skim
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10 Priorities for Research
10 Priorities for Research
Pages 167-172
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From page 167... ...
This is particularly true for roof runoff, in which the These research needs, if addressed, have the potential to ad- sources of indicator bacteria may be primarily derived from vance the use of graywater and stormwater to expand local animal waste that may or may not contain human pathogens. water supplies and ensure its safe and reliable use.
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From page 168... ...
in support of integrated water supply management, decision making, and refinement of decision tools Policy and Regulatory Issues 12. Identify incentives and various regulatory strategies that have proven effective in the implementation of stormwater or graywater systems to conserve water supplies ity in pathogen concentrations in graywater under different gens, and salts pose a particular concern for groundwater scales, storage conditions, and with and without source con- recharge.
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From page 169... ...
Develop risk-based water quality guidance for various systems could also assess the timing of water use relative to uses that could serve as a basis to develop standards of the demand for stormwater capture to assess the benefits propractice vided and to identify strategies to optimize multiple benefits. Risk-based water quality guidance should be developed TREATMENT TECHNOLOGY for various stormwater and graywater uses based on an understanding of anticipated human exposures from nonpo- As graywater and stormwater use expands in scale table uses of graywater and stormwater and possible con- and for uses other than subsurface or restricted access irritaminant concentrations (to be informed by research needs 1 gation, treatment will likely be necessary to protect public and 2)
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From page 170... ...
9. Identify strategies to retrofit existing infrastructure for With respect to the groundwater recharge of stormwa- enhanced beneficial use of on-site water sources ter, there is a need to better understand water quality improvements during storage and infiltration, including long- Research is needed on cost-effective strategies for retterm performance of natural treatment processes.
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From page 171... ...
Similarly, knowledge that laundry water is being performance data, potential water supply capture benefits, reused for irrigation may lead residents to do more laundry and the broad array of potential co-benefits should be colbecause the net cost of each load has been reduced. It is also lected in a database of graywater and stormwater projects.
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From page 172... ...
Examine how incentives and various regulatory markets, and integrated watershed management planning strategies have proven effective in the implementation that optimizes local sustainable water supplies. Research of stormwater or graywater systems to conserve water should include an assessment of regulatory barriers, includsupplies ing those that may arise if conveyances and delivery systems cross property lines (or water management boundaries)
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