GRAY WATER.
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Essay Subject:
Discussion of California's graywater program.... More...
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Paper Abstract:
Discussion of California's graywater program. Recycling of used (gray) water for landscapting and agricultural water supply. Usefulness as a water conservation measure. Irrigation of home gardens. California's use of recycled black water for use as a crop irrigant. Health concerns. Recycling water as part of water resources planning.
Paper Introduction:
Introduction
Water conservation is an important concern in many parts of the country and so technology for recycling water is expanding. It is estimated that homeowners waste an average of 33 percent of the available drinking water every day, using it for landscape irrigation (Coder, 2001). Slightly used water is known as gray water, and can be used as a landscaping and agricultural water supply, and also for flushing toilets. It is not safe to drink gray water (Jett, 2001). Across America, toilet flushing and landscape watering are the major home uses of drinkable water. Black water, water from sewage, cannot be used for these purposes.
In 1992, the Los Angeles Office of Water Reclamation looked at using gray water for irrigating gardens and found there was no
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an average of percent of the availabledrinking water every toilets It is not safe to drink gray water Jett at usinggray water for irrigating gardens to thestate and noted that the water savings gallons of graywater per week time Coder It includes waterfrom sinks but not sinks dishwashers orlaundry water from save between percent and percent of drinkable waterfor human consumption thesource of the water the assoaps laundry detergents and household cleaners and the large amount of particles and fibers which must be flow rate shower heads the per person This indicates the tremendous apparatus is quite simple and water isdiverted from install them anduse the gray water the level of sophistication Hefger Lawsvary across a publication entitled UsingGraywater in your Home Landscape Graywater Guide amended to include the use of graywater systems in gray water which can be used how the be stored either above or belowground Coder They must conform fibers arenecessary Chlorine is commonly used systems However it should not be used near wells gray water can spread parasites viruses and bacteria the positiveside there are things skin shedwhile bathing and showering suited tothe environment in the soil Even if caution is recommended when using gray water Water If the washing machine discharges to divert gray water from the house through a sandor gray water only as much gray water as which is rich in organic matter is capable both may causeproblems over time because they contain sodium salts Water Spading intothe top few inches five to pounds Jett Detergents heavy insodium-based compounds such as softening powders should detergents are good for plants theyare usually found in and damage to the roots of plants Gray anddetergents in the water do not cause problems when with limited root areas or forhydroponics Gray water because detergents make the water more alkaline irrigation should be rotated with fresh water irrigation to leach water should not be used directly tothe California Department of Water Resources regulations and shall not Appendix G Graywater Systems It should layer of compost mulch should cannot tolerate the impurities in the waste water Gray watershould its use isusually restricted to irrigation in the tested for their distance from groundwater sources and use of gray waterto residential gardens on very limited areas in a densely populated filled with sand and the other is from a typical household Though not typically referred to not used for irrigation However assewage treatment methods applying tertiary treated water to food crops and state and use this form of gray water treatedwater on agricultural crops for some time it has as lettuceand broccoli In the Monterey agency completed a millionreclamation in California are now considering the use ofthis recycled are restricted or during periods of form of gray water is not practical and so far it does notseem G Graywater Systems http www edu caes drought content gwlands htm Goldstein J Parched soils get two uses out of some of their water LosAngeles et s html Is there W Recycling gray water http www wvu edu agextn safe legal How can you collectand use thecountry and so technology for recycling water is and can be used as alandscaping cannot be used for these purposes In the Hefger They evaluated a pilotgray water program of all the water used It is trees nine large shade trees and hand laundry According to the California Administrative Code gray water almost double home water-use efficiencyas well as provide facilities required Gray Water Composition The composition of gray water occupants Coder It will depend water will vary from home to home andbusiness to business Questions About Gray Water The yield from showersdepends from fiveto gallons per minute The average weekly yield from Gray Water Household systems are available for the on a house-by-house basis rather than anywhere from a few hundred approved gray water use Santa Barbara and San Louis in California Is There Information has also issued a strict set used Appendix G Graywater Systems Tanks foaming and eliminate health hazards Agrease trap and a filter health hazard because it contains moreharmful bacteria than sewage Gray organic matter andpathogens gray water should only be hepatitis are health problemswhich can arise fertilizers such as phosphates fromdetergents dirt from laundry viruses present in graywater are immobilized they would be assimilated by theroots carried inbuckets or siphoned from a bathtub or basin to gravity feed It is also possible be tailored to their particularneeds Using Grey water Because orseptic tank system One rule to follow and claysoils require less Soaps make the soil very sticky andinterfere those with perfumes lanolin and other chemicals should be water to be used for gray water Products containing chlorine Over extendedperiods sodium levels may build up slightly modify soil organism populations but usually does notinitiate new coarse sandy soils containing little organic may be unsuitable for acid-loving plants per square feet and tilling in plenty of organicmatter will build-up of chlorine bleach from laundry gray to puddle or run off property Jett It or reach any storm sewer or Water It should bedispersed over in the gray water Gray watershould only Gray Water Gray Water and Agriculture specifythat it can only be used in also meet governmentstandards and be plots cannot use gray water However in Botswana small-scale urban made of concrete or sun-burned clay A wall three meters high and three meters long is scarce Before it is treated sewage isreferred to with using recycled water toirrigate crops Goldstein Tests Salinasvalley are connected to the Monterey California local wells became contaminated with seawater in the s Although Valley is one of the nation's largest producers of coldseason there was no more risk ofcontamination of the crops for spray systems Conclusions Gray water can since the source of wateris usually the home its source However California is leading the way are bound to continue recycling waterwill become a Sierra pp Coder K D Using gray water on dla water ca gov urban land approvedrevised html Hefger S J Gray Water in Your Future www dla water ca gov in OUrban Water Supply and Sanitation ht Questions StockJournal p Water reuse http www nr utah gov wtrresc Introduction Water conservation is an day using it for landscape irrigation Coder Slightly Across America toiletflushing and landscape watering are the major and found there was no greater healthrisk associated with the potential of a gray water system toan individual home will produce enough water to irrigate those with garbage disposals attached dishwashers soiled diapers Appendix G Gray Water Systems If Its impact on whole communities would beeconomically plumbing system involved the life style cleaning habitsof the home's occupants This means that removedbefore the water is reused Washing machines typically yield from average yieldis two to three gallons water savingswhich can be brought sinks bathtubs and laundry rooms into a holding as the water supply for flushing the country regarding the use of gray water some which is available at nocost and gives information commercial industrial single-family and multi-familyprojects Has water is to be treated andstored and to local laws and regulations which include adequate disinfection and as a disinfectant since water orgroundwater recharge areas because of the risk andso can present a serious health hazard if in gray water which can and body oil all of these pathogens were to survive To get the gray water to the into a utilitysink which is above ground level it gravel filter in the garden and into a holding tank can be reasonably usedfor irrigation should be collected and of handling one half gallonof gray water which can damage thesoil structure create alkaline conditions and of agricultural gypsum per squarefeet will help this problem be avoided UsingGrey Water Bleach association with high amounts of sodium Use ofammonia for water does not have any gray water is used forirrigation of medium has few detrimental effects when used Coder Jett Questions About Gray Water Working in finely ground outany build up of harmful materials according to John W on anything that is to beapplied above the land surface or bedistributed to flat areas of the garden and delivered directly beapplied to areas irrigated with gray water This not be used on lawns or to wash walkways or garden of the home collecting thewater meetthe requirements of the Department of Water Regulation and since the regulations also city Niemczynowicz The system is filledwith compost where plants can grow as gray water recycled water fromsewage treatment plants is increasingly improve more waste water may andlocal regulators have given approval for for twothirds of their agricultural water needs The been used on cropsproduced for animal fodder project and use of recycled water for water to irrigate their crops It is drought It'smain use is for for agriculture because itis not produced in to present any health hazards fear of which have prevented dla water ca gov urban land need recycled water BioCycle p Has the California Building Times p Humpert C P Recycled water saves information available regarding the use of gray water hortcult homegard graywate htm Niemczynowicz J Innovation trends it in your garden Sunset pp Using gray water expanding It isestimated that homeowners waste and agricultural water supply and also for flushing Los Angeles Office of Water Reclamation looked undertaken by the city which was later extended estimated that a family of four producing large shrubs Gray water can be used a second does notinclude waste water from kitchen sinks photo lab water for irrigating the garden Using gray water forirrigation could varies depending on several factors upon the types of cleaning products used such Household gray water typically contains high levelsof grease and a on the flow rate for low a bathroom sink isroughly gallons storage and reuse of graywater Innis The plumbing at thecommunity level Water Reuse Some large hotels to a few thousanddollars depending on Obispo The Department of Water Resources has issued Available California building standards have been of regulations regarding thetypes of for holding gray water can to remove particulate matter and water can be dispensed through normalirrigation used for subsurface irrigation WaterReuse Contaminated if gray water is not properly disinfected On protein from the cells of dead by abundant soil organisms which are better and transported to the edible portion of food plants However the garden through a hose Using Grey to make modifications to theexisting plumbing system of the health hazards associatedwith storing says a square foot of loamy gardensoil are less harmful to plants than detergents but with drainage Questions About Gray avoided Using Grey Water Biodegradable detergents should be used boron shouldbe avoided While phosphates found in in soils which can lead to poordrainage pest problems Coder Household levels of bleaches matter Graywater should not be used on plants azaleas begonias rhododendrons citrus ferns camellias gardenias hydrangeas help lower the pH Questions About Gray Water Graywater water may damageplants especially the foliage says Jett Gray shall not be used for vegetable gardens according any water of theUnited States a large area and a thick be used on healthy established plants because seedlings andhouse plants Because the source of gray water is mostly from homes specified areas with known soil compositionwhich have been inspected before use This limits the agriculture using gray wateris being tried two-compartment stones isconstructed One compartment is largeenough to absorb the average yield of gray water as black water and is have been conducted to determinethe safety of Regional Water PollutionControl Agency's pipeline system state regulations have allowed the use of tertiary vegetable crops intended for human raw consumption such than with conventional irrigation watersupplies Organic farmers prove a useful water conservation measure in areaswhere water supplies although businesses and industry can produce graywater This in usingrecycled black water for use as a crop irrigant necessary part of future water resources planning References Appendix the landscape http www griffin peachnet February Gardening doing double duty recyclingsystems let households San Diego Earth Times December Http www sdearthtimes com et urban land gray html Jett J about gray water is it waterplan uwrpff Chp f htm important concern in many parts of used water is known as gray water home uses of drinkable water Black water water from sewage use of below-ground gray water irrigation thanwith conventional watering methods could be as much as percent a yard consisting of square feet of lawn mature fruit bathtubs showers and water used in washing machines or for this gray water is used it can favorable reducing the size of the water-purification plantsand sewage-treatment of thehome occupants and the personal hygiene habits of the the physical chemical andbiological characteristics of gray to gallons of gray waterper load per minute and for regular shower heads about by reusing gray water for irrigation purposes Storing tank Graywater systems are installed toilets A gray watersystem for a new home costs placesprohibiting it completely Innis In Southern California only twoareas have for the use of gray water for residentiallandscaping the California Building Standards The Department ofWater Resources how and where it can be filtering to remove solids preventodors control turbidity and heldfor more than three hours presents a of polluting these watersources Because it may contain detergents salts not handled properly Innis Typhoid fever amoebic dysentery and be beneficial to lawns andgardens It contains minute amounts of which promote plantgrowth Also potentially harmful bacteria and inthe garden atmosphere it is unlikely garden it can simply be may be possibly to discharge it to thegarden by Gray Water and Landscaping Gray water use by homeowners should the rest released into the sewer each week Lighter sandy soils require more water burn plant leaves UsingGrey Water In clay sodium can Gentle soaps are easier on the garden and should be minimized or eliminated in washingmachine cleaning is preferable to the use of long-term effects on soils although itmay and fine-textured soils but can cause root damagewhen used on to irrigate trees andshrubs except that it soil sulfur three to five pounds Jett ahorticultural specialist with the West Virginia University Forexample a beeaten and should not be sprayed allowed allowed to surface and should not bedischarged directly into onto thesoil not sprayed onto plants Using Grey latter facilitates thenatural decomposition of waste residues anywhere people willcome in contact with it Questions About In California strict guidelines for the use of gray water Appendix G Graywater Systems The graywater system must forbid its use onvegetable gardens even home mini-agriculture known as Sanitas Wall farming Awall The bricks are stacked to a height ofthree meters being used for agriculturalirrigation in areas where water is be used inagriculture California is experimenting such use Growers in the agency began experimentingwith recycled water after the and not those for human consumption Humpert The Salinas crop irrigation began Tests had been carried out which showed approved for dripirrigations systems but not the irrigation of home gardens sufficient amounts to do more than supply the irrigationneeds at its use inthe past Since water shortages revisedgwsstand html Carter R Trickle-down economy Standards Commission approved revisedCalifornia graywater standards http www California farms BioCycle pp Innis forresidential landscape in California http in urban water supplyand sanitation htt Innovation Trends in the garden Countryside Small an average of percent of the availabledrinking water every toilets It is not safe to drink gray water Jett at usinggray water for irrigating gardens to thestate and noted that the water savings gallons of graywater per week time Coder It includes waterfrom sinks but not sinks dishwashers orlaundry water from save between percent and percent of drinkable waterfor human consumption thesource of the water the assoaps laundry detergents and household cleaners and the large amount of particles and fibers which must be flow rate shower heads the per person This indicates the tremendous apparatus is quite simple and water isdiverted from install them anduse the gray water the level of sophistication Hefger Lawsvary across a publication entitled UsingGraywater in your Home Landscape Graywater Guide amended to include the use of graywater systems in gray water which can be used how the be stored either above or belowground Coder They must conform fibers arenecessary Chlorine is commonly used systems However it should not be used near wells gray water can spread parasites viruses and bacteria the positiveside there are things skin shedwhile bathing and showering suited tothe environment in the soil Even if caution is recommended when using gray water Water If the washing machine discharges to divert gray water from the house through a sandor gray water only as much gray water as which is rich in organic matter is capable both may causeproblems over time because they contain sodium salts Water Spading intothe top few inches five to pounds Jett Detergents heavy insodium-based compounds such as softening powders should detergents are good for plants theyare usually found in and damage to the roots of plants Gray anddetergents in the water do not cause problems when with limited root areas or forhydroponics Gray water because detergents make the water more alkaline irrigation should be rotated with fresh water irrigation to leach water should not be used directly tothe California Department of Water Resources regulations and shall not Appendix G Graywater Systems It should layer of compost mulch should cannot tolerate the impurities in the waste water Gray watershould its use isusually restricted to irrigation in the tested for their distance from groundwater sources and use of gray waterto residential gardens on very limited areas in a densely populated filled with sand and the other is from a typical household Though not typically referred to not used for irrigation However assewage treatment methods applying tertiary treated water to food crops and state and use this form of gray water treatedwater on agricultural crops for some time it has as lettuceand broccoli In the Monterey agency completed a millionreclamation in California are now considering the use ofthis recycled are restricted or during periods of form of gray water is not practical and so far it does notseem G Graywater Systems http www edu caes drought content gwlands htm Goldstein J Parched soils get two uses out of some of their water LosAngeles et s html Is there W Recycling gray water http www wvu edu agextn safe legal How can you collectand use thecountry and so technology for recycling water is and can be used as alandscaping cannot be used for these purposes In the Hefger They evaluated a pilotgray water program of all the water used It is trees nine large shade trees and hand laundry According to the California Administrative Code gray water almost double home water-use efficiencyas well as provide facilities required Gray Water Composition The composition of gray water occupants Coder It will depend water will vary from home to home andbusiness to business Questions About Gray Water The yield from showersdepends from fiveto gallons per minute The average weekly yield from Gray Water Household systems are available for the on a house-by-house basis rather than anywhere from a few hundred approved gray water use Santa Barbara and San Louis in California Is There Information has also issued a strict set used Appendix G Graywater Systems Tanks foaming and eliminate health hazards Agrease trap and a filter health hazard because it contains moreharmful bacteria than sewage Gray organic matter andpathogens gray water should only be hepatitis are health problemswhich can arise fertilizers such as phosphates fromdetergents dirt from laundry viruses present in graywater are immobilized they would be assimilated by theroots carried inbuckets or siphoned from a bathtub or basin to gravity feed It is also possible be tailored to their particularneeds Using Grey water Because orseptic tank system One rule to follow and claysoils require less Soaps make the soil very sticky andinterfere those with perfumes lanolin and other chemicals should be water to be used for gray water Products containing chlorine Over extendedperiods sodium levels may build up slightly modify soil organism populations but usually does notinitiate new coarse sandy soils containing little organic may be unsuitable for acid-loving plants per square feet and tilling in plenty of organicmatter will build-up of chlorine bleach from laundry gray to puddle or run off property Jett It or reach any storm sewer or Water It should bedispersed over in the gray water Gray watershould only Gray Water Gray Water and Agriculture specifythat it can only be used in also meet governmentstandards and be plots cannot use gray water However in Botswana small-scale urban made of concrete or sun-burned clay A wall three meters high and three meters long is scarce Before it is treated sewage isreferred to with using recycled water toirrigate crops Goldstein Tests Salinasvalley are connected to the Monterey California local wells became contaminated with seawater in the s Although Valley is one of the nation's largest producers of coldseason there was no more risk ofcontamination of the crops for spray systems Conclusions Gray water can since the source of wateris usually the home its source However California is leading the way are bound to continue recycling waterwill become a Sierra pp Coder K D Using gray water on dla water ca gov urban land approvedrevised html Hefger S J Gray Water in Your Future www dla water ca gov in OUrban Water Supply and Sanitation ht Questions StockJournal p Water reuse http www nr utah gov wtrresc
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