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Earlier editions: 20222019

Chapter 15 — ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS

California Plumbing Code (Title 24, Part 5) · 2025 edition · updated 2026-09-10 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

(Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

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Chapter/Section
1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 & Exception
1501.4
1501.5
1501.5 Exception
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1 Exception
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2 Exception
1503.3 & Exceptions
1503.4 Exception
Table 1503.4		 BSC BSC-
CG		 SFM HCD DSA OSHPD BSCC DPH AGR DWR CEC CA SL SLC
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Chapter/Section
1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 BSC BSC-
CG		 SFM 1 2 1-AC AC ** SS** SS/CC 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 6
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X X X X X X X
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1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 & Exception
1501.4
1501.5
1501.5 Exception
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1 Exception
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2 Exception
1503.3 & Exceptions
1503.4 Exception
Table 1503.4		 BSC BSC-
CG		 SFM HCD DSA OSHPD BSCC DPH AGR DWR CEC CA SL SLC
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1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X X
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1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X X
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1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X
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1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X
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1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X
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1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 & Exception
1501.4
1501.5
1501.5 Exception
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1 Exception
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2 Exception
1503.3 & Exceptions
1503.4 Exception
Table 1503.4		 BSC BSC-
CG		 SFM HCD DSA OSHPD BSCC DPH AGR DWR CEC CA SL SLC
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1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X X
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1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
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1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
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1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
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1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
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1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 & Exception
1501.4
1501.5
1501.5 Exception
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1 Exception
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2 Exception
1503.3 & Exceptions
1503.4 Exception
Table 1503.4		 BSC BSC-
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1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
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1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X
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Chapter/Section
1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X X X X
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Chapter/Section
1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X X X
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Chapter/Section
1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X X
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Chapter/Section
1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X
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Chapter/Section
1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 & Exception
1501.4
1501.5
1501.5 Exception
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1 Exception
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2 Exception
1503.3 & Exceptions
1503.4 Exception
Table 1503.4		 BSC BSC-
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Chapter/Section
1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 & Exception
1501.4
1501.5
1501.5 Exception
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1 Exception
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2 Exception
1503.3 & Exceptions
1503.4 Exception
Table 1503.4		 BSC BSC-
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Chapter/Section
1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 & Exception
1501.4
1501.5
1501.5 Exception
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1 Exception
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2 Exception
1503.3 & Exceptions
1503.4 Exception
Table 1503.4		 BSC BSC-
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X
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1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4		 X X

CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE

CHAPTER 15 - ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS (continued) (Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

Adopting Agency BSC BSC-
CG		 SFM HCD DSA OSHPD BSCC DPH AGR DWR CEC CA SL SLC
Adopting Agency BSC BSC-
CG		 SFM 1 2 1-AC AC ** SS** SS/CC 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 6
Adopt Entire Chapter X X X X X X X X
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sections listed below)		 X X
Adopt only those sections
that are listed below		 X X X
Chapter/Section
1503.5_Exception_ X X
1503.6 X X
1503.7 Exceptions 2 & 3 X X
1503.8_Exception_ X X
1503.8.1 X
1503.8.2 X
1503.8.2.1 - 1503.8.2.3 X
1503.8.3 X X
1503.9 X X
1503.9.1 X X
1503.9.3 - 1503.9.4 X X
Table 1504.2 X X
1504.3_Exceptions 1 & 2_ X X
1504.4 Note X X
1504.5 - 1504.5.3 X X
Table 1504.5.3 X X
1504.8 X X
1504.9 X X
1504.9.1 X X
1504.11 X X
1505.0 - 1505.16 † † † X
Figure 1505.10 X
Table 1505.16 † † X
1506.0 - 1506.4 Exceptions X X
1506.4 & Exceptions X
1506.5 X X
1506.6 -1506.10.6 X X
1506.12 X X X
1506.13 X X

This state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.0.

308 2025 CALIFORNIA PLUMBING CODE

CHAPTER 15

ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS

1501.0 General.

1502.0 Inspection and Testing.

1503.0 Gray Water Systems. [BSC-CG] Gray water sys-

tems shall be verified in accordance with the California Green Building Standards Code (CALGreen), Chapter 5, Division 5.3.

1504.0 Subsurface Irrigation System Zones.

1505.0 Recycled Water Supply Systems in Buildings .

1506.0 On-Site Treated Nonpotable Gray Water Sys-

tems.

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▸Contents — California Plumbing Code (Title 24, Part 5)
California Plumbing Code (Title 24, Part 5)
  1. Chapter 1 — GENERAL CODE PROVISIONS
  2. Chapter 2 — DEFINITIONS
  3. Chapter 3 — GENERAL REGULATIONS
  4. Chapter 4 — PLUMBING FIXTURES AND FIXTURE FITTINGS
  5. Chapter 5 — WATER HEATERS
  6. Chapter 6 — WATER SUPPLY AND DISTRIBUTION
  7. Chapter 7 — SANITARY DRAINAGE
  8. Chapter 8 — INDIRECT WASTES
  9. Chapter 9 — VENTS
  10. Chapter 10 — TRAPS AND INTERCEPTORS
  11. Chapter 11 — STORM DRAINAGE
  12. Chapter 12 — FUEL GAS PIPING
  13. Chapter 13 — HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICA…
  14. Chapter 14 — FIRESTOP PROTECTION
  15. ▸Chapter 15 — ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS
    Overview
    1. 1501.1 Applicability. [BSC-CG, DWR & HCD 1] The provisions of …
    2. 1501.2 System Design. [BSC-CG, HCD 1 & DWR]
    3. 1501.3 Permit. [BSC-CG, HCD 1 & DWR] It shall be
    4. 1501.4 Component Identification. System components
    5. 1501.5 Maintenance and Inspection. [BSC-CG, HCD
    6. 1505.16 .
    7. 1501.6 Operation and Maintenance Manual. [BSC-
    8. 1501.7 Minimum Water Quality Requirements. [BSC-
    9. 1501.8 Material Compatibility. Alternate water source systems …
    10. 1501.9 Signage. [BSC-CG, HCD 1, HCD 2 & HCD 1-
    11. 1501.10 System Controls. Controls for pumps, valves, and
    12. 1502.1 General. Alternate water source systems shall be
    13. 1502.2 Supply System Inspection and Test. Alternate
    14. 1502.3 Cross-Connection Inspection and Testing. An
    15. 1502.4 Separation Requirements. Underground alternate
    16. 1502.5 Abandonment. Alternate water source systems that
    17. 1502.6 Sizing. Unless otherwise provided for in this chapter, …
    18. 1503.1 General. The provisions of this section shall apply to
    19. 1503.2 System Requirements. Gray water shall be permitted to b…
    20. 1503.3 Connections to Potable and Reclaimed (Recy-
    21. 1503.4 Location. No gray water system or part thereof shall
    22. 1503.5 Plot Plan Submission. No permit for a gray water
    23. 1503.6 Prohibited Location. Where there is insufficient
    24. 1503.7 Drawings and Specifications. The Authority Having Juris…
    25. 1503.8 Procedure for Estimating Gray Water Dis-
    26. 1503.9 Gray Water System Components. Gray water
    27. 1504.1 General. Irrigation or disposal fields shall be permitt…
    28. 1504.2 Required Area of Subsurface Irrigation
    29. 1504.3 Determination of Maximum Absorption
    30. 1504.4 Groundwater Level. No excavation for an irrigation fiel…
    31. 1504.5 Irrigation, Disposal Field and Mulch Basin
    32. 1504.6 Reserved.
    33. 1504.7 Reserved .
    34. 1504.8 Gray Water System Color and Marking Infor-
    35. 1504.9 Other Collection and Distribution Systems.
    36. 1504.10 Testing. Building drains and vents for gray water
    37. 1504.11 Maintenance. Gray water systems and components shall b…
    38. 1505.1 General. The provisions of Section 1505.0 through
    39. 1505.2 Permit. It shall be unlawful for a person to construct,
    40. 1505.3 System Changes. No changes or connections shall
    41. 1505.4 Connections to Potable or Recycled Water
    42. 1505.5 Water Pressure. Reclaimed (recycled) water systems supp…
    43. 1505.6 Initial Cross-Connection Test. A cross-connection
    44. 1505.7 Recycled Water Supply System Materials.
    45. 1505.8 Recycled Water Supply System Color and
    46. 1505.9 Valves. Valves, except fixture supply control valves,
    47. 1505.13 Signage . Signs in rooms and water closet tanks in
    48. 1505.14 Inspection and Testing. Recycled water supply
    49. 1505.10 Hose Bibbs. Hose bibbs shall not be allowed on
    50. 1505.11 Required Appurtenances. The recycled water
    51. 1505.12 Pipe Separation in Trenches . Reclaimed (recycled) wat…
    52. 1505.15 Minimum Water Quality Requirements for
    53. 1505.16 Maintenance and Inspection. Recycled water
    54. 1506.1 General. The provisions of this section shall apply
    55. 1506.2 Plumbing Plan Submission. No permit for an
    56. 1506.3 System Changes. No changes or connections shall
    57. 1506.4 Connections to Potable or Recycled Water
    58. 1506.5 Water Pressure. On-site treated non-potable gray
    59. 1506.11 Valves. Valves, except fixture supply control
    60. 1506.12 Signs. Signs in buildings using on-site treated nonpot…
    61. 1506.13 Inspection and Testing. On-site treated nonpotable gra…
    62. 1506.6 Initial Cross-Connection Test. A cross-connection test …
    63. 1506.7 On-Site Treated Nonpotable Gray Water Sys-
    64. 1506.8 On-Site Treated Nonpotable Gray Water
    65. 1506.9 On-Site Treated Nonpotable Gray Water Sys-
    66. 1506.10 Design and Installation. The design and installation o…
  16. Chapter 16 — NONPOTABLE RAINWATER CATCHMENT SYSTEMS
  17. Chapter 17 — REFERENCED STANDARDS
  18. Appendix A — RECOMMENDED RULES FOR SIZING THE WATER SUPPLY SYS…
  19. Appendix B — EXPLANATORY NOTES ON COMBINATION WASTE AND VENT S…
  20. Appendix C — ALTERNATE PLUMBING SYSTEMS
  21. Appendix D — SIZING STORM WATER DRAINAGE SYSTEMS
  22. Appendix E — MANUFACTURED/MOBILE HOME PARKS AND RECREATIONAL V…
  23. Appendix F — FIREFIGHTER BREATHING AIR REPLENISHMENT SYSTEMS
  24. Appendix G — SIZING OF VENTING SYSTEMS
  25. Appendix H — PRIVATE SEWAGE DISPOSAL SYSTEMS
  26. Appendix I — INSTALLATION STANDARDS
  27. Appendix J — COMBINATION OF INDOOR AND OUTDOOR COMBUSTION AND …
  28. Appendix K — POTABLE RAINWATER CATCHMENT SYSTEMS
  29. Appendix L — SUSTAINABLE PRACTICES
  30. Appendix M — PEAK WATER DEMAND CALCULATOR
  31. Appendix N — IMPACT OF WATER TEMPERATURE ON THE POTENTIAL FOR …
  32. Appendix O — NON-SEWERED SANITATION SYSTEMS
  33. Appendix P — PROFESSIONAL QUALIFICATIONS
  34. Appendix Q — INDOOR HORTICULTURAL FACILITIES
  35. Appendix R — TINY HOUSES
  36. Appendix S — ONSITE STORMWATER TREATMENT SYSTEMS

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