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HB2548 - 572R - I Ver
REFERENCE TITLE:
water-efficient plumbing fixtures
State of Arizona
House of Representatives
Fifty-seventh Legislature
Second Regular Session
2026
HB 2548
Introduced by
Representative
Mathis
AN
ACT
amending
sections 45-311, 45-312, 45-313, 45-313.01 and 45-319, Arizona Revised
Statutes; relating to water conservation plumbing requirements.
(TEXT OF BILL BEGINS ON NEXT PAGE)
Be it enacted by the Legislature of the State of Arizona:
Section 1. Section 45-311, Arizona Revised
Statutes, is amended to read:
START_STATUTE
45-311.
Definitions
In this article, unless the context otherwise requires:
1. "Commercial, industrial
and
or
public construction" means buildings used for
commercial, industrial or public purposes, including restaurants, bars,
nightclubs, public buildings, comfort stations, schools, gymnasia, factories,
offices, athletic clubs, hotels and motels.
2. "Person" means an individual, public or
private corporation, company, partnership, firm, association, society, estate
or trust, any other private organization or enterprise, the United States, any
state, territory or country or a governmental entity, political subdivision or
municipal corporation organized under or subject to the constitution and laws
of this state.
3. "Plumbing fixture"
:
(
a
)
Means
a lavatory faucet, lavatory faucet replacement aerator, kitchen faucet, kitchen
faucet replacement aerator, shower head, urinal, water closet, evaporative
cooler or decorative fountain.
Plumbing fixture
(
b
)
Does
not include parts necessary for routine maintenance.
4. "PSI" means pounds per
square inch of water pressure.
5.
4.
"Residential
construction" or "residential dwelling" means buildings used for
temporary or permanent human habitation, including
single family
single-family
residences and accessory guest houses,
multi-family
multifamily
dwellings,
townhouses, condominiums, apartments, the sleeping quarters of hotels and
motels, dormitories and group housing units.
6.
5.
"Urinal"
means a fixture that consists of a
water flushed
water-flushed
bowl
,
and any
associated flush valve
,
and that is used
for the disposal
to dispose
of human
urine.
7.
6.
"Water
closet" means a fixture that consists of a
water flushed
water-flushed
bowl
,
and any
associated flush valve
,
and that is used for the
disposal of all wastes from the human body.
8.
7.
"
Water free
Water-free
urinal"
means a plumbing fixture that
does not require a water supply or
flushing device
is designed
to receive and convey
only liquid waste through a trap seal and into the gravity drainage system
without the use of water
for such function and that meets the
requirements of the American society of mechanical engineers (ASME) standard
A112.19.2M-95 or the American national standards institute (ANSI)
standard Z124.9-94 or any equivalent standard
A112.19.19 as in effect on January 1, 2026
.
8. "Watersense-labeled plumbing
fixture" means a plumbing fixture that has been tested and certified
pursuant to the watersense program and that is authorized to use the watersense
label.
9. "Watersense program"
means the United States environmental protection agency's watersense program
established under America's water infrastructure act of 2018 (P.L. 115-270; 132
Stat. 3765; 42 United States Code section 6294
b
).
END_STATUTE
Sec. 2. Section 45-312, Arizona Revised
Statutes, is amended to read:
START_STATUTE
45-312.
Prohibited plumbing fixtures; residential construction
Except as provided in sections 45-315 and 45-319,
beginning January 1,
1994
2028
,
no
a
person may
not
distribute, sell, offer for sale, import or install any plumbing fixture for
use in this state in any new residential construction or for replacing plumbing
fixtures in existing residential construction
,
unless the
fixtures meet the following water saving performance
standards
plumbing fixture is one of the following
:
1. Lavatory faucets and replacement
aerators shall be designed to deliver no more than an average of three gallons
of water per minute at a pressure of eighty PSI or shall be equipped with
permanent flow control devices that allow delivery of no more than an average
of three gallons of water per minute at a pressure of eighty PSI.
2. Kitchen faucets and replacement
aerators shall be designed to deliver no more than an average of three gallons
of water per minute at a pressure of eighty PSI or shall be equipped with
permanent flow control devices that allow delivery of no more than an average
of three gallons of water per minute at a pressure of eighty PSI.
3. Shower heads shall be designed to
deliver no more than an average of three gallons of water per minute at a
pressure of eighty PSI.
4. Water closets shall be designed to
use no more than an average of one and six-tenths gallons of water per flush.
5. Urinals shall be designed to use no
more than an average of one gallon of water per flush. No urinals
may be installed that use a timing device to flush periodically regardless of
demand.
1. A watersense-labeled plumbing
fixture.
2. A plumbing fixture that meets or
exceeds the water efficiency criteria established before January 1, 2028 by the
watersense program.
3. A plumbing fixture for which the
water efficiency criteria are not established before January 1, 2028 by the
watersense program.
6.
4. An
evaporative cooling
systems and
system
or
decorative
fountains shall be
fountain
that is
equipped with
a
water recycling or reuse
systems
system
.
END_STATUTE
Sec. 3. Section 45-313, Arizona Revised
Statutes, is amended to read:
START_STATUTE
45-313.
Prohibited plumbing fixtures; commercial, industrial or public
construction
Except as provided in sections 45-315 and 45-319,
beginning January 1,
1994
2028
,
no
a
person may
not
distribute, sell, offer for sale, import or install any plumbing
fixtures
fixture
for use in this state in any new commercial,
industrial or public construction or for replacing plumbing fixtures in
existing commercial, industrial or public construction
,
unless the
fixtures meet the following water saving performance
standards
plumbing fixture is one of the following
:
1. Lavatory faucets shall be equipped
with a mechanism that causes the faucet to close automatically after delivering
no more than one-fourth gallon of water or shall be designed to deliver no more
than an average of one-half gallon of water per minute at a pressure of
eighty PSI.
2. Shower heads shall be designed to
deliver no more than an average of three gallons of water per minute at a
pressure of eighty PSI.
3. Water closets shall be designed to
use no more than an average of one and six-tenths gallons of water per flush.
4. Urinals shall be designed to use no
more than an average of one gallon of water per flush. No urinals
may be installed that use a timing device to flush periodically regardless of
demand.
1. A watersense-labeled plumbing
fixture.
2. A plumbing fixture that meets or
exceeds the water efficiency criteria established before January 1, 2028 by the
watersense program.
3. A plumbing fixture for which the
water efficiency criteria are not established before January 1, 2028 by the
watersense program.
5.
4. An
evaporative cooling
systems and
system
or
decorative
fountains shall be
fountain
that is
equipped with
a
water recycling or reuse
systems
system
.
END_STATUTE
Sec. 4. Section 45-313.01, Arizona Revised
Statutes, is amended to read:
START_STATUTE
45-313.01.
Water-free urinals; state buildings
Every effort shall be made to install
water free
water-free
urinals in all new state buildings
constructed after
the effective date of this section
August 25, 2004
that constitute capital projects as defined in
section 41-790 and to install
water free
water-free
urinals in existing state
buildings. The director of the department of administration shall
endeavor to install as many
water free
water-free
urinals in as many state buildings as possible
if the director determines that, given all of the circumstances, their
use is in the best interest of this state
.
END_STATUTE
Sec. 5. Section 45-319, Arizona Revised
Statutes, is amended to read:
START_STATUTE
45-319.
Exception; waiver; preemption
A. The requirements of this article do not apply to
and do not prohibit the sale of
any plumbing fixture that is
documented to have been purchased by a plumbing wholesaler, retailer or end
user and that is actually located in this state before January 1,
1994
2028
.
B. The director may waive the
applicability of this article to historic fixtures as determined by the
director by rule.
B.
C.
An
ordinance adopted by a county, city or town relating to water conserving
low-flow plumbing fixtures is not preempted by this article to the extent that
the ordinance sets forth requirements that are at least as restrictive as the
requirements of this article or regulates fixtures that are not specified in
this article, but any such ordinance is preempted to the extent that its
requirements are less restrictive than the requirements of this article.
END_STATUTE
Sec. 6.
Effective date
A. Section 45-311, Arizona
Revised Statutes, as amended by this act, is effective from and after December
31, 2026.
B. Sections 45-312, 45-313,
45-313.01 and 45-319, Arizona Revised Statutes, as amended by this act, are
effective from and after December 31, 2027.