ACWWA 2007 WCPlan

• Project Type: Water Conservation Plan
• Applicant: Arber Water, WasteWater & Reuse Engineers
• Title: Arapahoe County Water and Wastewater Authority Water Conservation Plan
• Date: 11/1/2006
• County: Arapahoe
• Water Conservation - Doc Type: Complete Plan

Water Conservation Plan

1.6.4 Household and Landscape Efficiency

ACWW A provides its customers with voluntary watering schedules. The schedules are available
online and they are sent out in a springtime bill. There are three watering groups which are based
on the last two digits of the customers address. The schedule then outlines watering for each
group to occur every third day. The Authority also sends out a list of 1 00 Ways to Save Water
every year to its residential customers. A sample schedule and the water saving tips can be found
in Appendix F.

1.6.5 Rate Structures and Billing Systems Designed to Encourage Efficiency

ACWW A meters water services. Bills are sent to customers once a month. The Authority bills
homes based on the amount of water they use (volume billing), see Section 1.4.1. Currently
ACWW A has a tiered rate structure where the cost of water increases with the amount of water
used. This billing system is currently being evaluated.

1.6.6 Distribution System Efficiency

A Water Audit is conducted once a year. This usually corresponds with the annual financial audit
of ACWWA's records. The records of total water pumped for the calendar year are compared to
the total amount of water billed. Various unmetered water volumes are also identified and
quantified. An extensive metering program for both source water and service connections mal(es
the water audit possible. The Authority also has a program for meter testing and replacement.

1.6.7 Water Savings From Existing Conservation Activities

The exact quantity of water conserved by the conservation activities currently implemented by
ACWWA is unl(nown. Most of ACWWA's existing conservation activities are in the form of
regulations and policies that encourage conservation by water users. It is difficult to quantify
water savings from behavioral conservation practices in comparison to specific engineering
actions that limit water usage. The metering of water services and tiered water rate structures are
recognized to be some of the most effective means to encourage conservation by water users.

The total annual savings from all the conservation activities currently implemented by ACWW A
is estimated to be 30% of the average day demand or 1,330 acre-ft per year. The majority of
these savings is from the use of reuse water at Valley Country Club, the metering of water
services and the use of a tiered water rate structure.

1.6.8 Planned Future Conservation Projects

The capital improvement projects that ACWW A has already planned for the next 20 years
include a considerable amount of water conservation efforts.

November 2006

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Richard P. Arber Associates, Inc.