Current through Register Vol. 24-18, September 15, 2024
(1) Water system plans and small water system
management programs submitted for approval for the first year after January 22,
2007, must describe the municipal water supplier's existing water use
efficiency program. The municipal water supplier must continue existing levels
of water use efficiency.
(2)
Subsections (3) and (4) of this section apply to:
(a) Water system plans submitted to the
department for approval under WAC
246-290-100 one year after the
effective date of this rule.
(b)
Small water system management programs developed and implemented or submitted
to the department for approval one year after the effective date of this
rule.
(3) Municipal water
suppliers shall develop and implement a water use efficiency program which
includes sufficient cost-effective water use efficiency measures to meet the
water use efficiency goals developed under WAC
246-290-830.
(4) Municipal water suppliers shall complete
the following items in the water use efficiency program:
(a) Describe the current water use efficiency
program;
(b) For systems serving
one thousand or more total connections, estimate the amount of water saved
through implementation of the water use efficiency program over the prior six
or more years; the estimate may include the entire approval period of the most
recent water system plan required under WAC
246-290-100;
(c) Describe the chosen water use efficiency
goals and document the goals were established in accordance with WAC
246-290-830;
(d) Evaluate water use efficiency measures to
determine if they are cost-effective as follows:
(i) Evaluate or implement, at a minimum, the
number of water use efficiency measures specified in Table 18 of this section
based on the system's total number of connections.
(ii) Evaluate or implement water use
efficiency measures from the following categories of measures if they are
applicable: Indoor residential, outdoor, and
industrial/commercial/institutional.
(iii) For systems serving less than one
thousand total connections, describe the evaluation process used to select
water use efficiency measures.
(iv)
For systems serving one thousand or more total connections, include the
following criteria when evaluating water use efficiency measures:
(A) Quantitatively evaluate water use
efficiency measures to determine if they are cost-effective from the system's
perspective including the marginal costs of producing water.
(B) Address whether the water use efficiency
measures are cost-effective if the costs are shared with other
entities.
(C) Quantitatively or
qualitatively evaluate water use efficiency measures to determine if they are
cost-effective from the societal perspective.
Table 18
|
Number of connections |
Less than 500 |
500-999 |
1,000-2,499 |
2,500-9,999 |
10,000-49,999 |
50,000 or more |
|
Water use efficiency measures |
1 |
4 |
5 |
6 |
9 |
12 |
(e) Describe all water use efficiency
measures to be implemented over the next six or more years, including a
schedule and a budget that demonstrates how the water use efficiency measures
will be funded. Purveyors may submit a schedule and budget for the entire water
system plan approval period, if the approval period is longer than six
years;
(f) Describe how consumers
will be educated on water use efficiency practices;
(g) Estimate projected water savings from
selected water use efficiency measures;
(h) Describe how the water use efficiency
program will be evaluated for effectiveness;
(i) Evaluate water distribution system
leakage as follows:
(i) Include distribution
system leakage annual totals in accordance with WAC 246-290-820 for each of the
past six or more years. Purveyors shall submit distribution system leakage
annual totals for the entire water system plan approval period if the approval
period was longer than six years.
(ii) If necessary, include a copy of the
water loss control action plan in accordance with WAC
246-290-820(4).
(iii) If all or portions of transmission
lines are excluded when determining distribution system leakage, estimate the
amount of leakage from the excluded portion of the transmission mains and
describe how it is maintained to minimize leakage.
Statutory Authority:
RCW
70.119A.180. 07-02-025B, § 246-290-810,
filed 12/22/06, effective 1/22/07.
