Page 255 - Water Loss Control

228 Cha pte r F o u r tee n

Residential Industrial Metered Total for
2006 By (million (million Commercial Agriculture All Meters
Month gal) gal) (million gal) (million gal) (million gal)
January 146.6 35.8 8.1 0 190.5
February 162.9 35.8 8.1 0 206.8
March 162.9 35.8 8.1 0 206.8
April 179.2 39.1 8.1 24.4 250.8
May 211.8 42.4 8.1 57.0 319.3
June 228.1 48.9 8.1 74.9 360.0
July 260.3 48.9 8.1 57.0 374.3
August 266.5 48.9 8.1 74.9 398.4
September 228.1 45.6 8.1 65.2 347.0
October 162.9 35.8 8.1 0 206.8
November 162.9 35.8 8.1 0 206.8
December 146.6 35.8 8.1 0 190.5

Annual Total 2,318.8 488.6 97.2 353.4 3,258.0
Daily 6.35 1.34 0.27 0.97 8.93
Average, mgd

Source: American Water Works Association. “Water Audits and Loss Control Programs.” Manual of
Water Supply Practices M36, 3d ed. Denver, Colo.: AWWA, 2008.
TABLE 14.2 Total Metered Water Consumption by Category for County Water Company in 2006
(Uncorrected)

Data on Water Supplied to the distribution system (see Chap. 10) can be matched
with customer billing data and the amount of nonrevenue water tracked on a
preliminary basis, as shown in Table 14.3 for the Philadelphia Water Department. Using
such a report on a monthly basis gives the water utility a snapshot look at its water
efficiency status on a more periodic basis than the annual water audit. However, these
monthly numbers do not offer the detail or degree of validation of the water audit data,
but are still useful for short-term tracking of water efficiency standing.
If computerized billing records or reports do not exist, the water auditor must
assemble customer account information from available records. Start by identifying
all customer users from permanent structures who should have meters. Accounts
should be identified by several descriptors such as account number, property street
address, meter size, meter serial number, connection size, assessor’s parcel number,
and the name and address of the property owner, as well as any tenants. In order to
track customer consumption patterns and water conservation impacts it is important
to list the consumption category for each account: residential, industrial, commer-
cial, agricultural, governmental, and the like. Any data that is gathered manually in
this manner should be input into a computerized format. Ideally, the water utility
should move to purchase/install a standard computerized customer billing system.
In lieu of this, or during transition to such a system, data might be entered into a
desktop database or spreadsheet.