national multiple family submetering and allocation billing program ...

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Figure 5.1 shows the frequency distribution of water use for each of these four groups, using the combined 2001-2002 historic billing data. These histograms are plotted as lines rather than bars to make it easier to compare the shape of each distribution. The in-rent, submetered, and RUBS frequency distributions are quite similar in shape with the RUBS curve slightly elevated in the 60 – 90 kgal/unit/year range. The hot water hybrid distribution appears to be markedly shifted to the left (suggesting lower water use), but higher use in the 70 – 110 kgal/unit/year range pushed the average up. 25% 20% Relative Frequency 15% 10% 5% 0% 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 Avg. Annual Water Use Per Unit (kgal) In-Rent Submetered RUBS Hot Water Hybrid Figure 5.1 Frequency distribution, avg. annual water use per unit, postcard survey respondents Three separate t-tests were performed comparing the annual per unit water use (2001 and 2002) from the in-rent properties first against the submetered properties, then the RUBS properties, and finally the hot water hybrid properties. The purpose of these analyses was to determine if a statistically significant difference in water use exists between any of these groups at the 95% confidence level. The results of these t-tests are shown in Table 5.7. The null hypothesis in each test was that the difference in mean water use was 0. The alpha-level for a 95% confidence level was 0.05. Only the difference in means between the in-rent and the submetered properties proved to be statistically significant at the 95% confidence level. There 134
was no statistically significant difference found between water use at the in-rent properties and the RUBS or the hot water hybrid properties. This can also be observed in Figure 5.3, which shows that the confidence intervals around the estimate of the difference in the average water use of submetered properties compared to in-rent properties does not include 0. Table 5.7 Statistical tests of postcard survey respondent properties: in-rent properties vs. impact properties In-Rent vs. In-Rent vs. Hot Means (kgal) Submetered In-Rent = 53.21 Submetered = 44.87 In-Rent vs. RUBS In-Rent = 53.21 RUBS = 52.10 Water Hybrid In-Rent = 53.21 HWH = 49.61 Hypothesized Mean Difference 0 0 0 Degrees of freedom 299 745 40 t Stat 5.278 1.070 .732 p-value (T
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NATIONAL MULTIPLE FAMILY SUBMETERIN
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CONTENTS LIST OF TABLES............
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Matched-Pair Analysis .............
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LIST OF TABLES Table ES.1.1 Breakdo
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Table 6.6 Elasticity values, analys
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Figure 4.30 RUBS water bill #6 ....
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investigated local water savings as
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We are grateful to the members of a
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quantitative aspects of separate bi
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3. Owner/postcard survey: To identi
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"averages" of impact property water
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in-rent properties, others used the
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of these models included the billin
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70 Average Annual Water Use Per Uni
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COSTS AND BENEFITS Beyond quantifyi
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service charge, then the resident w
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Billing Method Efficient Fixtures?
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70 Avg. Water Use per MF Unit (kgal
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REGULATORY FRAMEWORK REVIEW The fra
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Table ES.1.12 NSUAA Summary of Stat
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above, the researchers offer the fo
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service is preferable, and would he
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practices (BMPs) should be implemen
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infrastructure of the building and
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multi-family housing. The transfer
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CHAPTER 1 INTRODU CTION More and mo
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In 1998, 15.0%, or 15.4 million, of
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TERMINOLOGY AND DEFINITIONS OF BILL
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submetering. With utility-submeteri
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all the two bedroom units for $20 p
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HOW TO USE THIS REPORT This report
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CHAPTER 2 LITERAT URE REVIEW As the
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A review of the literature unearthe
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The price elasticity of water deman
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expected. Additionally, McClelland
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submetered and five control (in-ren
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Another study might want to target
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CHAPTER 3 RESEARC H METHODS, APPROA
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1. Selection of participating study
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STUDY SITE SELECTION The Study aime
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Figure 3.2 National Multiple Family
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Matched pair protocol/survey - conf
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information given the available bud
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survey. Service companies that prov
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in “business to business” calli
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MATCHED PAIR SAMPLE The purpose of
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The second part of the visit requir
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epresentative of a known population
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51 Table 3.7 Postcard survey statis
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Table 3.8 Comparison of annual wate
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postcard survey. Nevertheless, exam
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confidence interval ranged from 49.
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particular property (e.g., the mont
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State PUC officials - water commiss
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10. The PROPID number appearing on
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These costs represent the commodity
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The postcard survey provided inform
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Table 4.4 Average number of units f
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Two-thirds of the properties that r
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Percent of Surveyed Properties with
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$700 Average Rent Per Bedroom ($) $
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Percent of Surveyed Properties with
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Impact properties were also more li
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Table 4.8 Issues considered before
Page 136 and 137: Percent of Surveyed Impact Properti
Page 138 and 139: 60% Percent of Surveyed Properties
Page 140 and 141: From the visits, it was found that
Page 142 and 143: 100% Percent of Surveyed Residents
Page 144 and 145: Roughly similar proportions of resi
Page 146 and 147: inserts for toilets (21%) or low-fl
Page 148 and 149: proportion were unsure, 37% from su
Page 150 and 151: Table 4.18 Ownership and rental rat
Page 152 and 153: Figure 4.17 Submeter water bill #1
Page 158 and 159: wastewater rates are not shown so t
Page 160 and 161: Figure 4.23 Hot water hybrid water
Page 162 and 163: RUBS Sample Bills Seven sample RUBS
Page 164 and 165: wastewater rates are not shown so t
Page 166 and 167: Figure 4.28 RUBS water bill #4 from
Page 168 and 169: Figure 4.30 RUBS water bill #6 RUBS
Page 170 and 171: directly to and then paid by the th
Page 172 and 173: never subtracting for common area w
Page 174 and 175: Late Fees At the start of water bil
Page 176 and 177: 124
Page 178 and 179: intuitively clear, and matches comm
Page 180 and 181: Indoor water use was normalized on
Page 182 and 183: Table 5.3 Summarized water use anal
Page 184 and 185: easonable assumption since there is
Page 188 and 189: 40 Difference in Annual Water Use p
Page 190 and 191: after 1995. By including only those
Page 192 and 193: 70 Average Annual Water Use Per Uni
Page 194 and 195: Table 5.11 Statistical tests compar
Page 196 and 197: Factors that Influence Water Use Th
Page 198 and 199: Table 5.12 Association of categoric
Page 200 and 201: Indoor Water Use per Unit in 2001 I
Page 202 and 203: Table 5.13 Continuous factors from
Page 204 and 205: Multivariate Models to Determine Im
Page 206 and 207: properties built before 1995 were c
Page 208 and 209: 70 Average Annual Water Use Per Uni
Page 210 and 211: A = Beta coefficient for “Propert
Page 212 and 213: substantially reduces the sample si
Page 214 and 215: Table 5.17 Model #2 coefficients an
Page 216 and 217: 0.00 indicating that whatever fit d
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Page 220 and 221: properties having generally lower w
Page 222 and 223: 110 Average Annual Water Use Per Un
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Page 226 and 227: Table 5.27 Paired samples test, all
Page 228 and 229: Table 5.30 Estimated water use befo
Page 230 and 231: Table 5.33 Comparison of water savi
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Page 234 and 235: sector only reduced usage by 18% (A
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Table 6.1 Avoided costs from submet
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submetered. Complete responses of c
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included in this cost/benefit analy
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Table 6.3 Cost and benefit for owne
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Perceived Concerns In the resident
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With a service fee, residents could
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Table 6.4 Economic return for a res
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ANALYSIS OF PRICE ELASTICITIES Econ
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concluded that if a single elastici
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esults from this analysis point to
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over which they have control than d
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According to the basic consumer cho
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The consumer choice problem can be
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210
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water systems from compliance with
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and methods of practice. NIST publi
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Table 7.1 NSUAA Summary of State Re
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New Surveys of State Agencies and W
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the AWWA WaterStats 1999 database.
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Measures, which dispatches a public
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Mississippi, Missouri, Pennsylvania
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226 Table 7.6 Summary of utility re
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DISCUSSION - KEY EXAMPLES OF STATE
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ill. Condominium associations are g
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under construction after January 1,
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Weights and Measures Regulation In
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from the submetering. Meter testing
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clean and decent housing or the lac
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240
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NATIONAL ORGANIZATIONAL STRUCTURE F
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complaints in all 50 states and app
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- Meters must demonstrate in testin
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- Plumbing systems are space constr
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(2) Twisted or kinked flex supply l
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252
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Estimated Water Use By Different Bi
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there are clear benefits to these s
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study site. These values were then
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immediately strengthens the owner's
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among the nation's key strategies f
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all repair and replacement decision
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These findings underscore the obser
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varies with volume of use) for mult
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Recommendation 6 - Efficient plumbi
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financially responsible for their o
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individual unit, the volume allocat
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RECOMMENDATIONS FOR FURTHER RESEARC
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Fixed rates - Part of a master mete
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Total-capture submetering - a type
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282
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Corral, L.R. 1997. Price and Non-Pr
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McClelland, L. 1980. Encouraging En
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Young, C.E., K.R. Kinsley and W.E.
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