Water use and conservation are as interconnected as supply
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1 Conservation May Help Control Costs with Flow Reductions Amy Vickers, engineer and author of the Handbook of Water Use and Conservation, writes in her book that, historically, water conservation has been seen as a standby or temporary source of supply... during times of drought or other emergency water shortage. But today, that notion is changing. Conservation lowers demand and is quickly being seen as a moneysaving option, for consumers and utilities alike, often saving homeowners hundreds of dollars and utility operators thousands of dollars in operating costs. In addition, conservation measures may sometimes allow utilities to downsize, or at the least, avoid capital expansions. The idea of water conservation probably began with the origins of humans, when the thought of carving a container to hold the life-saving liquid first occurred to people. Throughout history, the proximity or discovery of water dictated where our ancestors would settle. By Natalie Eddy, NESC STAFF WRITER Design by Julie Black Water use and conservation are as interconnected as supply and demand. The facilities used to collect and treat wastewater are sized to meet their demand. If the demand is high because of wasteful use, residents and industry alike are paying more for services than necessary. China is renowned for water conservation with a history that dates back more than 6,000 years. A water conservation museum is currently under construction in Hangzhou, the capital of east China s Zhejiang Province, named as the water home of China. The Beijing- Hangzhou Grand Canal, which was constructed in 486 B.C., remains today as one remnant of the country s early conservation efforts. More recently, the first national conservation movement in the U.S. occurred in 1933 with the establishment of the Soil Erosion Service (SES). As dust storms swept across the Great Plains in the 1930s, much of the land was rendered useless, which accentuated the need for conserving water. The land was so dry, the region became known as the Dust Bowl. Saving money is an attractive incentive for conservation, but there are other reasons as well. Although the Dust Bowl water shortage was far worse in terms of temperature, rainfall, and soil moisture rates, when you look at need the growing demand for water and the increasing population many authorities believe today s conditions rival those of the Dust Bowl, which makes conservation a timely and important topic. Currently, the western U.S. is struggling with a five-year drought. In the central and eastern parts of the country, often water is taken for granted, but Photos.com Photos.com Black Sunday, April 14, The dust storm that turned day into night. Many believed the world was coming to an end. Photo by Historic National Weather Service Collection 18
2 Photo by Historic National Weather Service Collection increasing infrastructure costs stemming from groundwater depletion and water-quality issues make water conservation an attractive practice for everyone. What s Required? There is no federal requirement for water conservation except where federal plumbing fixtures apply. Some states in the West have enacted conservation measures ranging from mandatory restrictions for customers with penalties to rebate programs for low-flow fixtures, such as toilets, showerheads, and washers. The Safe Drinking Water Act 1996 amendment required the U.S. Environmental Protection Agency (EPA) to publish guidelines for water utilities to use in preparing a water conservation plan. Under the amendment, states may decide whether to require utilities to file conservation plans. Although the guidelines are for water utility operators and not wastewater operators, many small community water services are connected with a public works department for both utilities, and the guidelines may apply to both providers. John Flowers, EPA water efficiency program director, said wastewater plant operators should participate in conservation program planning because wastewater facilities receive the benefit of reduced flows. Saving water also can help wastewater systems avoid, downsize, or postpone construction projects. Most states have some type of water efficiency requirements on the books, such as plumbing fixture or compliance efficiency standards. But in-depth conservation plans are a little harder to find, according to Vickers. She estimates that at least 15 states have some type of requirement for the development of a water conservation plan. There is probably just a handful of states that have an extensive plan, but in my view, that plan often doesn t really mean much, said Vickers. The reality is that many of these plans are perfunctory and in practical terms are not implemented. What really matters is what local and regional suppliers do. They are the decision makers. EPA Guidelines A 1998 EPA booklet titled Water Conservation Plan Guidelines outlines the voluntary steps wastewater and drinking water systems might take to initiate a conservation program. The booklet can be downloaded at -efficiency/wecongid.htm#pdf. The EPA conservation guidelines are broken down into three parts: basic, for water systems serving populations 10,000 or fewer; intermediate, for water systems serving between 10,000 and 100,000 people; and advanced, for those systems with more than 100,000. The conservation measures are broken down further into three levels: level one for basic systems recommends universal metering, water accounting and loss control, costing and pricing, and information and education; level two for intermediate systems lists water-use audits, retrofits, pressure management, and landscape efficiency; and level three for advanced systems recommends replacements and promotions, reuse and recycling, water-use regulation, and integrated resource management. A number of topics are addressed in the guidelines, such as integrating water conservation and infrastructure planning, water conservation planning criteria, state roles, and current state programs. The EPA booklet also discusses a capacity-development approach for very small systems, and there is also an overview to the organization, content, and use of the guidelines. The EPA conservation guidelines include: 1. Specify conservation planning goals list your goals and their relationship to supply-side planning and describe the community s role in the goal-development overall plan. 2. Develop a system profile inventory your facilities, production characteristics, and water use and prepare an overview of conditions that might affect your system and plan. 3. Prepare a demand forecast look at anticipated water demand in the future (any adjustments to that demand that can be calculated on known or measurable factors) and conduct a what if analysis. 4. Describe planned facilities decide what improvements are planned for the system in the near horizon, estimate the total annual unit cost per gallon of these supply-side improvements and additions, and prepare a preliminary forecast of the total water capacity needed based on the improvements and additions. 5. Identify water conservation measures review any conservation measures that have been implemented or are planned, discuss any legal or other barriers to the plan, and identify other measures that may need further analysis. 6. Analyze benefits and costs estimate the total implementation cost and water savings, conduct a cost-effectiveness assessment for the recommended conservation measures, and compare how much it will cost to implement the plan versus the avoided supply-side costs. 7. Select conservation measures develop selection criteria for choosing your conserva- 19
3 tion measures, select measures, and set up a strategy and timetable for implementing the selected conservation measures. 8. Integrate resources and modify forecasts modify water demand and supply capacity forecasts to reflect the effects of the conservation measures, discuss the effects of the measures on planned water purchases, improvements, and additions, and discuss the effects of the planned conservation measures on the overall revenues. 9. Present implementation and evaluation strategy outline approaches for implementing and evaluating the conservation plan and, finally, have the plan approved by the system s governing body. The good news is that there are a number of systems around the country, small and large, that have water conservation programs, said Vickers. In my experience, the best programs are actually those that are self-generated. They re not doing them because the state is requiring them. They re doing them because they perceive a need, and they value the role of conservation. That is what really drives effective conservation plans from what I see. Vickers adds in her book that to date, no water or wastewater utility has fully exploited its potential for water conservation or optimized the use of its existing system. Taking That First Step Flowers said when thinking about adopting a conservation plan, the first step a water or wastewater utility operator should take is to figure out a goal. It s like planning a facility, really. You have to look at the structure of your program and what each component costs and what benefit it will be to achieving your goal, he said. From there, a water or wastewater operator should do a costbenefit analysis. You have to make sure that by reducing water use, you re not reducing revenues to the point where you affect the operation of the facility, he said. Rate planning should be part of the process. There have to be enough benefits to outweigh the expenditure of resources. In other words, if the system isn t planning to grow or your water sources are inadequate, a conservation program is often very effective in avoiding the costs of plant expansion or developing another water source. The plan has to be done with a goal in mind. You have to ask what s to be achieved by the conservation plan. If the goal is to reduce operating costs, for example, then a more modest program may be called for. Vickers added that each community should look at its particular situation before designing a conservation program. When a water system develops a conservation plan, the operators shouldn t take a cookiecutter approach and look at what the town next door is doing, because I find that every system is unique, said Vickers. There are some generalities and commonalities, but just because the town next door is doing one thing doesn t mean that you should, too. Vickers added that a sound water conservation plan is goal-oriented, cost-effective, and practical in design and implementation. She said that, ideally, a conservation plan should involve participation from all stakeholders water and wastewater managers, planners, engineers, financial administrators, information specialists, the public, businesses, environmental interests, and policymakers. She added that these stakeholders should be involved from the beginning of the process, not just at the end. Flowers noted that much information has been written about conservation. But developing an effective conservation program is not an easy thing to do. I don t want to delude anybody into thinking it is, he said. But whether you want to reduce the cost of future infrastructure or help solve some environmental problem like keeping more water in the streams and/or reducing impacts on groundwater, a conservation program can be a useful and cost-effective tool. Vickers and Flowers agree that system-wide demand reductions of at least 25 percent from a conservation program might be a reasonable goal for many utilities. My professional view is that water and wastewater systems should look at the EPA guidelines because they re good, Vickers said. In addition, they also need to understand their unique water-use scenario where and how water is used in their system to set goals and make a plan about the best conservation approach for their particular system. Because community A, with 10,000 customers, and community B, with 10,000 customers, have very different types of uses, I wouldn t apply a cookie-cutter approach with either one. For example, if one had a lot of agricultural users, they would have a different conservation plan than the other with more suburban users. 20
4 Photos.com Important Points Flowers added that a very important conservation measure for water utility operators is a leakage management program. Leaks should be determined in the plant, line, and at the end user. Plant operators need to do a system audit to figure out where the water is going by using a water accounting system such as the one in the guidelines, said Flowers. Then, a plan should be developed for detecting leaks using electronic listening equipment or other techniques. Vickers agreed, adding that the leakage issue is often neglected and can sometimes equal between 10 to 30 percent of the produced water. It s very important system wide that mains, pipes, and connection valves are regularly audited and checked for leaks. It sounds so simple just fix the leaks but from the point of a water source to the water plant, the incidence of leakage and losses can sometimes be quite high in volume, Vickers said. That s not often looked at. Just because it s been neglected doesn t mean it s something we should continue to not pay attention to. Flowers said metering is a very important part of leakage management. You can t do an effective system audit if you re not metering what goes out and what your customers are using, so you can t estimate water loss, he said. All that said, Flowers cautions that sometimes it may not be costeffective to continually repair a water main segment, and pipe replacement may be necessary. Good record keeping and testing may allow you to predict when pipes may fail, and timely replacement could prevent leakage. Rebate and Retrofit Small water and wastewater utilities may also consider some type of rebate or retrofit program with its customers, such as low-flow showerhead changeovers or low-flow toilets. Traditionally it s been difficult for a very small water utility to offer some of these same kinds of programs that have been used successfully by large facilities, but there may be a way to work with the state, Flowers said. Most states have conservation criteria in their Drinking Water or Clean Water State Revolving Loan Fund (SRF). SRFs can also make water conservation measures eligible for funding. If a state approved such an eligibility, a utility could borrow SRF money to set up a rebate program, for example, and pay it back over time, he added. The eligible cost of the conservation in this case would be the administrative costs and the rebates, but many other conservation measures could be eligible if the state elects. The Clean Water SRF program can fund projects that reuse wastewater for public purposes, while the Drinking Water SRF program can fund projects to create dual distribution systems for drinking water and water for other uses, such as lawn watering. Both programs can be used to fund nonstructural measures that accurately track water usage and water efficient devices, such as plumbing fixtures and appliances. SRF loans average 2.2 percent compared to market rates that average 4.8 percent currently. A project funded at the lower rate compared to the market rate would cost 21 percent less. It might also be feasible to work with other small utilities on a regional basis, going together to set up a rebate or retrofit program. By pooling your resource, you might get more bang for your buck, Flowers said. These programs have been a very effective way of helping to reduce water use and wastewater generation in a service area, particularly in the West and in coastal regions where there is high growth and limited water availability. Consumer Education Utilities should also play an important role in educating consumers, according to Flowers. Utilities should make an effort to provide its customers with water-saving tips to reduce wastewater flows. A typical household uses approximately 260 gallons of water per day, according to the EPA. The American Water Works Association (AWWA) states that if all U.S. households installed water-efficient fixtures and appliances, water use would decrease by 30 percent, saving an estimated 5.4 billion gallons per day. Installation of low-flow toilets reduces water use from 3.5 to 7 gallons per flush to 1.6 gallons per flush. 21
5 The following are some other helpful conservation efforts in addition to changing fixtures and appliances. Don t use the toilet as a wastebasket; older toilets use 3.5 to 7 gallons per flush. Reduce the water level per flush by installing a toilet displacement device in older toilets, such as a plastic bottle weighted with pebbles and water. Check toilets for leaks by putting a few drops of food coloring in your toilet tank. If the color begins to appear in the bowl without flushing, you have a leak. Don t let the sink run while brushing teeth you will save more than 5 gallons of water. Instead of running water, clean razors in a small pool of water or a glass of water. Take shorter showers a quick shower rather than a bath can save an average of 20 gallons of water. Use both sides of the sink when washing dishes one side to wash and the other to rinse. Don t wash dishes with the water running. Garbage disposals use approximately 11.5 gallons of water per day. Try composting organic wastes instead. Keep a bottle of water in the refrigerator instead of waiting for the tap water to get cold. Use dishwasher and washer on full only. Install flow restrictors in faucets. Final Thoughts Once a utility has initiated a conservation plan, Flowers said an important follow-up step to any plant conservation program is to try to measure results. You need to know whether you ve been effective, and then you can demonstrate to the town or the city that you ve gotten your money s worth. It s very important to try to plan a way to measure your results and show how you ve benefited, Flowers said. In the end, the main benefit and the easiest one to show is an obvious one saving water. Some things in life are simple, said Vickers. And with that comes a savings in money, via operation and maintenance costs. For every gallon of water you save, you re saving money in costs for chemicals and power to treat that water, Vickers added. But aside from finances, from an ecological perspective, water conservation may also have an effect on our health relating to the way we use water. Water conservation is increasingly important to our health. There is a relationship between how we use water and the chemicals and other pollutants in our lives, said Vickers. We have a growing national and global population, but nature s water budget is fixed. Over time, we need to learn to use water more wisely if we re going to meet our essential water needs in the future. For more information about water conservation, contact Vickers at (413) or Flowers at (202) Related Products (order form on page 39) WWVTPE42 Dollars Down the Drain: Caring for Your Septic Tank...$10.00 WWBLRE28 Household Water Reduction and Design Flow Allowances for On-Site Wastewater Management and Supplement...$4.00 WWFSGN196 Composting Toilets...$1.40 SFBLTO04 Alternative Toilets...$1.25 SFBLTO05 Graywater Systems...$1.25 WWFSGN190 High Efficiency Toilets...$1.00 WWFSGN197 Incinerating Toilets...$1.00 WWFSOM53 Septic Tank and Drainfield Operation and Maintenance...$0.80 WWFSGN198 Oil Recirculating Toilets...$0.80 WWFSPE92 How a House Works: What Happens After the Flush...$0.80 WWFSGN111 Water Efficiency...$0.40 SFPLNL28 Graywater: Safe Reuse and Recycling...$0.40 SFPLNL22 Alternative Toilets: Options for Conservation and Specific Site Conditions...$0.40 SFPLNL17 Infiltration and Inflow Can be Costly for Communities...$0.40 WWBRPE26 Preventing Pollution through Efficient Water Use...$0.40 WWBLPE31 Sanitary Sewer Overflows: What Are They, and How Do We Reduce Them?...$0.00 WWBKGN Guidelines for Water Reuse (Book)...$0.00 WWCDGN Guidelines for Water Reuse (CD ROM)...$
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