(a)
City’s
Water Utility Profile.
A complete evaluation of the city’s
water and wastewater system and customer use characteristics is provided
in the complete water conservation utility profile. The utility profile
is provided as attachment A to Ordinance O2018-06-02. The city’s
water conservation plan has a five-year planning horizon. The conservation
measures and initiatives of the city are proposed for achieving the
future conservation goals and water use targets. The city’s
conservation plan recognizes the value of the city’s water supply
resource; efforts to avoid water loss and to conserve using reasonable
and cost-effective measures are proposed in the plan.
(b)
Existing
System Description.
(1)
Raw
Water Supply.
The city obtains their supply from a single
source wholesaler, Aquilla Water Supply District.
(2)
Water
Distribution.
(A)
The city’s potable water distribution system is supplied by
a single wholesale provider Aquilla Water Supply Corporation. The
Aquilla WSD water is supplied through several direct taps to the Aquilla
distribution system. The purchased water is stored and treated by
the Aquilla WSC Treatment plant. The design treatment capacity of
the Aquilla WSD is 9.3 MGD.
|
Table 1. Water Sources
| |
|---|---|
|
Location
|
Capacity (GPD)
|
|
Aquilla Water District
|
9.3 MGD
|
(B)
The city has a water CCN #10892 (certificate of convenience and necessity)
filed with the state. The water CCN for the city encompasses the majority
of the city limits.
(C)
Additional information is provided in the attached utility profile
on the customer base characteristics of the city’s system.
(3)
Storage
Facilities.
The city currently has four (4) storage facilities
with a total storage capacity of 1.2 million gallons. The following
table shows the existing storage available for the system:
|
Table 2. City Water Storage Facilities
| ||||
|---|---|---|---|---|
|
Location
|
Type
|
Pressure Plane Served
|
Storage volume
(MG)
|
Material
|
|
Downtown EST
|
Elevated
|
720
|
0.2
|
Steel
|
|
Industrial EST
|
Elevated
|
755
|
0.2
|
Steel
|
|
Hill College EST
|
Elevated
|
840
|
0.2
|
Steel
|
|
W. Elm GST
|
Ground
|
720
|
0.6
|
Concrete
|
(4)
Pump
Stations.
The city does not currently operate any pump
stations. The filling of the existing ground and elevated storage
is provided and maintained via pressures by Aquilla Water Supply District.
Aquilla WSD is the single source wholesale supply for the city.
|
Table 3. City Pump Stations
| ||
|---|---|---|
|
Pump Station Name
|
# Pumps in Service
|
Pump Station (GPM)
|
|
None
|
|
|
(5)
Wastewater
Treatment.
The city owns its own wastewater treatment
plant. The current wastewater flows for the city average 1.0 MGD.
The plant is permitted for a maximum average daily flow of 1.8 MGD.
(c)
Water
Use.
(1)
It
is anticipated that the population growth of this community, located
along IH-35 and adjacent to the city, will continue to be significant
for the long-term future. The growth rates for recent historical period
for the city’s water use appears to be increasing by roughly
0.76%. This reflects the city’s location as an inviting area
to reside and the opportunity of excellent schools adjacent to the
Waco metropolitan area. The average projected annual population growth
rate developed by the TWDB from 2020–2070 is 0.915%. Although
this is significant growth, the Hillsboro area has sufficient areas
to accommodate sustained growth over the long term. Further, prudent
planning for future use on a conservative basis will help ensure that
the city does not have a shortfall in its water supplies for the future.
(2)
Based
on historical population numbers from the U.S. Census Bureau and projected
populations from the TWDB, the city’s population and water customer
base are steadily increasing as shown on the following:
|
Table 4. City Water Service Population
| ||
|---|---|---|
|
Year
|
Projected Population
|
Water Demands
|
|
2018
|
8500
|
190 GPCD
|
|
2019
|
8906
|
190 GPCD
|
|
2020
|
9313
|
190 GPCD
|
|
2021
|
9398
|
189 GPCD
|
|
2022
|
9483
|
189 GPCD
|
|
2023
|
9568
|
188 GPCD
|
|
2024
|
9653
|
187 GPCD
|
|
2025
|
9738
|
186 GPCD
|
|
2026
|
9778
|
185 GPCD
|
|
2027
|
9825
|
185 GPCD
|
|
2030
|
9916
|
170 GPCD
|
|
2035
|
10120
|
170 GPCD
|
|
2040
|
10324
|
170 GPCD
|
|
2050
|
10500
|
165 GPCD
|
(3)
The
historical water use and per capita use are shown for the most recent
five-year period in the following table:
|
Table 5. City Historical Water Usage
| ||
|---|---|---|
|
Year
|
Water Use
|
GPCD
|
|
2013
|
533,293,000
|
172
|
|
2014
|
505,201,000
|
163
|
|
2015
|
496,281,000
|
160
|
|
2016
|
462,257,000
|
150
|
|
2017
|
480,897,000
|
154
|
(4)
The
recent per capita water use does not reflect a trend in water use
responsive to water conservation measures, but it provides an initial
baseline to use in setting targets and measuring the effectiveness
of conservation measures. Under normal hydrologic conditions, where
irrigation impacts do not result from extended drought conditions
during the lawn and turf irrigation season, the past five (5) years
of historical data show an average per capita usage of 161 GPCD.
(5)
The
impact of the summer irrigation season on the per capita water use
is significant, but not atypical for a growing community in Central
Texas.
|
Figure 1. City Monthly Water Usage (GPCD)
| |||||
|---|---|---|---|---|---|
|
Month
|
2017
|
2016
|
2015
|
2014
|
2013
|
|
January
|
138
|
138
|
138
|
150
|
157
|
|
February
|
142
|
139
|
133
|
138
|
144
|
|
March
|
146
|
128
|
143
|
140
|
151
|
|
April
|
137
|
127
|
144
|
153
|
154
|
|
May
|
151
|
126
|
128
|
158
|
159
|
|
June
|
147
|
150
|
141
|
153
|
181
|
|
July
|
162
|
170
|
183
|
177
|
218
|
|
August
|
161
|
186
|
220
|
216
|
235
|
|
September
|
191
|
167
|
219
|
204
|
226
|
|
October
|
169
|
154
|
194
|
171
|
158
|
|
November
|
149
|
169
|
140
|
157
|
138
|
|
December
|
155
|
142
|
136
|
134
|
140
|
|
Total
|
158
|
152
|
158
|
164
|
172
|
(6)
The
graph shows a breakdown of GPCD for each month in the past five (5)
years. The GPCD noticeably increases during the summer months of June,
July, August, and September. A reduction in per capita use during
the summer irrigation season is an important target and perhaps the
most critical target for the city’s water conservation efforts.
Lawn and turf irrigation have a major impact on the per capita water
use. Also, since total water use increases during these periods, the
potential for water loss in transmission is at its maximum.
(7)
Therefore,
the summer season is a key period for implementing cost-effective
water conservation measures as well as for tracking the conservation-effectiveness
of those measures.
(Ordinance O2018-06-02 adopted 6/5/18)
(a)
Description
of Targets and Goals.
(1)
The
city has ample water supplies available for present and future needs.
The city recognizes the state’s goals of water conservation
and supports those goals. As a growing community, the city recognizes
the opportunity to establish goals that will provide measurable results
(reductions in water use and losses) in the future.
(2)
The
following goals are stated as guidelines for the city relative to
water conservation:
(A)
The city will encourage the conservation of water through media,
mail-outs and other avenues. Conservation messages will be conveyed
at the time of the year when water use is expected to increase.
(B)
The city will work toward reducing water loss by repairing and replacing
aged distribution mains and customer meters.
(C)
The city will establish a goal of 155 GPCD total, 145 GPCD residential
water use and a 56 GPCD water loss over the next 20 years.
(3)
These
reductions are based on average water use of 161 GPCD from 2013–2017.
It is anticipated that efforts to identify and reduce leakage will
be significant, but cannot be quantified until the efforts are implemented
and results measured in terms of metered water use in future years.
(4)
The
following table shows the reduction in water consumption that is anticipated
for the twenty (20) year period between 2020 and 2040. The future
water savings projections are calculated by using 5% and 10% reductions
on the current GPCD of 161.
|
Table 6. Water Conservation Plan 5 and 10 Year Goals for Water
Savings
| ||||
|---|---|---|---|---|
|
|
Historic 5 yr Average
|
Baseline
|
5-yr Goal for year 2023
|
10-yr Goal for year 2028
|
|
Total GPCD
|
161
|
161
|
156
|
153
|
|
Residential GPCE
|
54
|
54
|
52
|
50
|
|
Water Loss(GPCD)
|
57
|
57
|
56
|
54
|
|
Water Loss Percentage
|
35%
|
35%
|
36%
|
35%
|
(b)
Schedule
for Implementing Goals.
The city has established conservation
goals to achieve conservation in a practical manner that avoids ineffective
and costly approaches and measures. These goals should be effective,
achievable, and sustainable. Further, the impact from variation in
rainfall should be included. The goal will be accomplished through
a multi-faceted effort:
(1)
Continued
compliance with the state’s plumbing code requirements and the
city’s use of the International Plumbing Code;
(2)
Continued
metering of 100% of the city’s water customers and accurate
accounting for public use of water;
(3)
Calibration
of meters for all treated water deliveries on an annual basis;
(4)
Water
audit to identify water losses and plan for measures to address identified
problems on a priority basis;
(5)
Annual
review and update to the city’s inverted block rate structure
and consideration of additional rate classes;
(6)
Continued
efforts to reduce system leakage and manage water loss through a permanent
leak detection and repair program;
(7)
Increased
water accounting, including a record management system of monthly
production, metered consumption, and water losses that is desegregated
by customer class;
(8)
Implementing
a reuse program through the regional sewer authority to reuse or reclaim
municipal effluent;
(9)
Review
of water conservation provisions and requirements in the city’s
wholesale water contracts; and
(10)
Educating
the public on efficient water use and water reuse.
(c)
Conservation
Measures and Qualifications of Potential Savings.
The
water usage reduction goals of 8.1 GPCD in 2020 (5%) and of 16.2 GPCD
(10%) by the year 2025 are based on anticipated savings from each
of the city’s conservation efforts. These efforts are described
generally in the following sections of the conservation plan. The
quantity of water savings can be estimated by identifying an appropriate
water savings in GPCD based on guidance information and historical
data. As part of the city’s water management effort further
quantification with respect to the city’s conservation applications
and results will be documented to support future adjustments to the
conservation goals. The following table shows the ranges of potential
GPCD reductions for different conservation measures. The method used
to identify the range of reduction is shown as well as a cross reference
to the TWDB’s best management practices (BMP) guide.
|
Table 7. Water Conservation Strategies
| |||
|---|---|---|---|
|
Conservation Measure
|
Related BMP
|
Method to Determine Range of Potential Reduction
|
Result Reduction on Total Water Use
(GPCD)
|
|
Reducing indoor water use: toilet replacement, shower head,
toilet flapper, etc. required pursuant to state law
|
7.3, 7.4
|
Reduction expected was calculated by the TWDB and updated for
the Brazos G Regional Water Plan.
|
Per capita use includes the TWDB estimated reductions
|
|
Water conservation pricing, “nonpromotional” rates
|
3.1
|
Anticipate an elasticity of only 1 to 3 percent for every 10%
increase in average monthly water bill or a price elasticity of -.20
for Texas (2% reduction for every 10% increase lack of response to
price increases requires larger increases in price to achieve small
reductions in demand; indicating that the .20 elasticity can be achieved
with strong public education program to inform consumer of the rate
block and seasonal use increases.
|
1.6 to 4.9 with single anticipated 10% increase prior to 2020
|
|
Meter replacement and accuracy verification program
|
4.1, 4.2
|
Estimates of water savings associated with the meter replacement
are utility specific; it can be estimated that a small-size city with
an ongoing program will increase in efficiency over time (identify
and replace faulty meters reducing continued excessive use from nonregistering
meters). Therefore, using 2017, the total number of metered connections
is 3,183. Assuming that 1% of the total meters are nonregistering,
then replacement of those meters may result in a reduction in the
total water loss of 20,000 gal/day in 2025, that equates to an overall
GPCD reduction of 2.05 in the year 2025.
|
2.0
|
|
Public education programs
|
6.1
|
Education programs are a means of making the consumer aware
in a timely manner of the quantity and cost of the water used, compliment
the effectiveness of the conservation rate structures. Public education
is effective in helping to implement replacement programs. School
education programs that distribute end-use water savings fixtures
are also found to be effective. Until more quantifiable data is available
a reduction of 2.0 to 4.0 GPCD is assumed.
|
2.0 to 4.0
|
|
Water loss and leakage detection repair
|
|
As piping continues to age and valves and appurtenances fail
to function, the leakage increases and the value of leak detection
increases. The quantifiable amount of water savings from the leak
detection and correction should be identified as part of the water
audit process. The city is preparing an estimate of its water loss,
but an estimate for a Central Texas city would be in the 15% to 20%
range of total water use. The estimate for per capita water savings
for the Central Texas area is estimated at 1.0 to 3.0 GPCD. This could
be somewhat higher/lower for the city.
|
1.0 to 3.0
|
(Ordinance O2018-06-02 adopted 6/5/18)
The city is a small-size city that will take appropriate steps
to gauge the effectiveness of its water conservation efforts. Where
costs are not prohibitive, the city will take the following steps
to measure the effectiveness of the conservation plan in meeting the
targets and goals set forth:
(1)
Logs will
be maintained on master meter calibrations, testing of meters, and
for meter replacement;
(2)
Audits
will be conducted and well documented with records kept in city files;
(3)
Records
will be kept by the city staff of mail-outs to citizens on water conservation,
public programs conducted by the city’s public information officer
(PIO), and any other related efforts;
(4)
Water
rates will be implemented by and tracked by city ordinance;
(5)
Records
and logs will be kept for leak detection efforts conducted by the
city or its agents.
(Ordinance O2018-06-02 adopted 6/5/18)
(a)
Master
Meter.
The city currently does not meter each of its
connections to Aquilla Water Supply District. The current operating
procedures in place entail Aquilla WSD metering total flows from treatment
plant and subsequently subtracting metered flows from surrounding
communities and the resulting flow is associated to the city. The
Aquilla WSD meters are inspected monthly and annually calibrated to
insure accurate readings for billings.
(b)
Meter
Testing/Maintenance and Repair/Replacement.
The city
does have an ongoing meter replacement program. The city identifies
meters for replacement based on two primary criteria: age and recording
accuracy based on billing records. The city identifies meters in the
distribution system that have exceeded this service life, and schedules
those for replacement. The city reviews its water billing records
continuously. Records that indicate a malfunctioning or potential
malfunctioning meter are flagged. The meter for the specific record
is either inspected in the field or pulled for testing at the city’s
shop.
(c)
Water
Loss.
(1)
The
city has an ongoing program for detecting leaks in its system and
for repairing identified leaks. Leaks are detected based on billing
and metering records review as well as visual inspection of the system
by city crews. The city staff review the pumping records and the master
meter information to compare with the billing records. Any large discrepancies
are investigated to determine potential causes. Records are kept of
the production (master) meter readings for collating with the corresponding
billing and meter records.
(2)
The
city visually inspects and carefully monitors deliveries of treated
water from the city to detect any water losses in the city transmission
line flowing to the city.
(d)
Goal
for Water Loss Reduction (GPCD).
The water loss reduction
goal for the city is 5% for the next 10 years and 10% for the following
30 years. These goals are typical and responsible for a Central Texas
small-to medium-sized city. The city meters treated water as opposed
to total diverted; therefore, the water loss estimates are based on
treated water billed. The city will continue to work on reducing water
loss in treated water distribution and metering with the goal of cutting
water losses to 10%.
(Ordinance O2018-06-02 adopted 6/5/18)
The city will initiate a program to provide public education
and information regarding water conservation. It will include providing
water conservation information directly to each water user through
mail-outs annually as well as providing water conservation literature
to new customers when they apply for service. The city will coordinate
with the city PIO on water conservation education efforts.
(Ordinance O2018-06-02 adopted 6/5/18)
(a)
The city
has adopted an inverted block rate structure that is not “promotional.”
The rates are cost-based, tiered, and discourage the excessive use
of water.
(b)
The city’s
current water rate structure is provided below:
(1)
Water
Rates - Residential - Inside City Limits.
|
Meter Size
|
Rate-1st 2,000/gals.
|
Per thousand after 2,000 minimum
|
|---|---|---|
|
3/4"
|
$42.58
|
$2.79 per 1,000 gallons for 2,001 to 10,000 gallons
|
|
$4.17 per 1,000 gallons for consumption exceeding 10,000 gallons
| ||
|
1"
|
$71.45
|
$2.79 per 1,000 gallons for 2,001 to 10,000 gallons
|
|
$4.17 per 1,000 gallons for consumption exceeding 10,000 gallons
| ||
|
1-1/2"
|
$71.45
|
$2.79 per 1,000 gallons for 2,001 to 10,000 gallons
|
|
$4.17 per 1,000 gallons for consumption exceeding 10,000 gallons
| ||
|
2"
|
$71.45
|
$2.79 per 1,000 gallons for 2,001 to 10,000 gallons
|
|
$4.17 per 1,000 gallons for consumption exceeding 10,000 gallons
| ||
|
3"
|
$281.11
|
$2.79 per 1,000 gallons for 2,001 to 10,000 gallons
|
|
$4.17 per 1,000 gallons for consumption exceeding 10,000 gallons
| ||
|
4"
|
$424.23
|
$2.79 per 1,000 gallons for 2,001 to 10,000 gallons
|
|
$4.17 per 1,000 gallons for consumption exceeding 10,000 gallons
| ||
|
6"
|
$821.75
|
$2.79 per 1,000 gallons for 2,001 to 10,000 gallons
|
|
$4.17 per 1,000 gallons for consumption exceeding 10,000 gallons
|
(2)
Water
Rates - Nonresidential - Inside City Limits.
|
Meter Size
|
Rate-1st 2,000/gals.
|
Per thousand after 2,000 minimum
|
|---|---|---|
|
3/4"
|
$42.58
|
$3.40 per 1,000 gallons exceeding the minimum consumption
|
|
1"
|
$71.45
|
$3.40 per 1,000 gallons exceeding the minimum consumption
|
|
1-1/2"
|
$106.20
|
$3.40 per 1,000 gallons exceeding the minimum consumption
|
|
2"
|
$153.89
|
$3.40 per 1,000 gallons exceeding the minimum consumption
|
|
3"
|
$281.11
|
$3.40 per 1,000 gallons exceeding the minimum consumption
|
|
4"
|
$424.23
|
$3.40 per 1,000 gallons exceeding the minimum consumption
|
|
6"
|
$821.75
|
$3.40 per 1,000 gallons exceeding the minimum consumption
|
(3)
Water
Rates - Outside City Limits.
Water service rate for customers
outside the city limits shall be billed at 1.5 times the inside city
limits rates shown above.
(Ordinance O2018-06-02 adopted 6/5/18)
(a)
Upon the
completion and review of the water conservation plan, the city council
will be asked to approve the plan by resolution.
(b)
The city’s
water conservation plan will be submitted to the Regional Water Planning
Group to ensure coordination with the plan. Pertinent information
from the conservation plan is available for incorporation in the next
update to the Brazos G Regional Water Plan.
(Ordinance O2018-06-02 adopted 6/5/18)
