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Title 16 — BUILDING REGULATIONS

Chapter 16.12 — RECYCLED WATER

Palo Alto Municipal Code · 2026-09 edition · updated 2026-09-29 · Palo Alto

16.12.025 Converting existing potable water users (with existing dual plumbing) to…

16.12.010 Definitions.

(a) "Dual plumbing" means a system of two sets of water pipes, one for recycled water for toilets and urinals and one for potable water for other interior uses.

(b) "Floortrap priming" means the practice of adding water to traps beneath floor drains to ensure a barrier from sewer gas.

(c) "Identified customers" are entities purchasing water from the city who are adjacent to a recycled water pipeline shown in a Final Palo Alto Recycled Water Project Plan. Identified customers do not include single family residences. (d) "Recycled water" means wastewater treated by the Regional Water Quality Control Plant that meets state requirements for reuse.

(e) "Recycled water permit" means a permit issued by the city manager or his/her designee to allow a customer to use recycled water at its facility.

(f) "Recycled water project area" means a geographical area of the city designated by resolution of city council as an area where recycled water will be served.

(Ord. 5002 § 2, 2008)

16.12.015 Compliance with state and local regulations.

All users of recycled water shall comply with the California Department of Public Health regulations contained in Title 17 and Title 22 of the California Code of Regulations, and with the Palo Alto Water Reuse Rules and Regulations for the use of recycled water.

Additional opportunities and/or requirements for adding recycled water infrastructure or nonresidential and multifamily new construction and major renovation projects are described in Chapter 16.14 (California Green Building Code).

(Ord. 5108 § 4, 2010: Ord. 5002 § 2, 2008)

16.12.020 Converting existing potable water users to recycled water for irrigation.

Within the boundaries of any recycled water project area, identified customers who are notified by mail by the city shall use recycled water for irrigation when available. Any such notification shall include the conditions of use, pricing, and construction schedule for the city's recycled water pipeline and the connections to it.

(Ord. 5002 § 2, 2008)

16.12.025 Converting existing potable water users (with existing dual plumbing) to…

trap priming.

For facilities with existing dual plumbing within the boundaries of any recycled water project area, identified customers shall use recycled water when it is available following notification by mail by the city that a conversion to recycled water for toilet and urinal flushing and floor trap priming purposes is required. Any such notification shall include the conditions of use, pricing, and construction schedule for the city's pipeline and the connections to it.

(Ord. 5002 § 2, 2008)

16.12.030 New construction; recycled water use for irrigation.

(a) All applications for land use permits, building permits and other discretionary actions for projects other than single family homes, within the boundaries of any recycled water project area, filed after the adoption of this chapter, shall include the following:

(1) Plans demonstrating that recycled water will be used, when available, for all irrigation.

(2) Consideration of plants suitable for irrigation with recycled water.

(3) The installation of the on-site infrastructure necessary to connect the irrigation system to the city's recycled water supply when it becomes available.

(b) All applications for land use permits, building permits and other discretionary actions for projects other than single family homes, in geographic areas not within the boundaries of a recycled water project area, where the total landscape area exceeds 1,500 square feet, filed after the adoption of this chapter, shall include the following:

(1) Plans demonstrating that recycled water will be used, when available, for all irrigation.

(2) Consideration of plants suitable for irrigation with recycled water.

(3) The installation of on-site infrastructure necessary to connect the site's irrigation system to the city's recycled water supply when it becomes available.

(Ord. 5002 § 2, 2008)

16.12.035 New construction; recycled water use for toilet and urinal flushing and floor trap priming.

(a) All applications for building permits for new or remodeled buildings or groups of buildings within the boundaries of a recycled water project area, filed after the adoption of this chapter, where the building square footage total, including both the original square footage and any addition, is greater than 10,000 square feet or where installation of twenty-five or more toilets and urinals is proposed, shall incorporate dual plumbing in the design of the facility to allow the use of recycled water, when it becomes available, for flushing toilets and urinals and priming floor traps. Dual plumbing requirements shall not apply to single family homes.

(b) All applications for building permits for new or remodeled buildings or groups of buildings in geographic areas not within the boundaries of a recycled water project area, filed after the adoption of this chapter, where the building square footage total, including both the original square footage and any addition, is greater than 50,000 square feet or where installation of 50 or more toilets and urinals is proposed, shall incorporate dual plumbing in the design of the facility to allow the use of recycled water, when it becomes available, for flushing toilets and urinals and priming floor traps. Dual plumbing requirements shall not apply to single family homes.

(c) When dual plumbing requirements are triggered by remodeling, only those restroom facilities located within the remodel project area shall be required to incorporate dual plumbing.

(Ord. 5510 § 3, 2020: Ord. 5481 § 3, 2019: Ord. 5002 § 2, 2008)

16.12.040 Recycled water permit required.

Upon written notification pursuant to §§ 16.12.020 and 16.12.025 that recycled water is available and must be used, the recycled water customer shall obtain a recycled water permit by submitting a recycled water permit application, which shall include plans detailing the recycled and potable water distribution systems at the facility. A city representative shall review the plans and conduct a field inspection before the recycled water permit is issued. The applicant must make any required changes as directed by the city before a recycled water permit may be issued.

(Ord. 5002 § 2, 2008)

16.12.045 Recycled water permit conditions; verification of compliance.

The recycled water permit shall specify the requirements for the applicant's use of recycled water based on the water reuse rules and regulations adopted pursuant to § 16.12.015, and shall require compliance with the California Department of Public Health regulations contained in Title 17 and Title 22 of the California Code of Regulations and with any additional requirements specified by the state water resources control board. Recycled water shall not be supplied to a facility until inspection by a city representative determines that the applicant is in compliance with the permit conditions.

(Ord. 5002 § 2, 2008)

16.12.050 Exemptions and adjustments.

An application for an exemption or an adjustment to the requirements of this chapter shall be made to the director of public works or his/her designee. Requests for an exemption or adjustment may be made consistent with state law and shall be based on the finding by the director of public works that the use of recycled water demonstrates an adverse effect to the applicant's landscaping installed prior to the effective date of the ordinance codified herein. The director of public works may also consider any additional factors, including any special costs or hardships which may be created by the use of recycled water. A written determination will be made on all requests for exemptions or adjustments within ten business days and mailed to the applicant. If the exemption or adjustment is not granted, the applicant must fully comply with the requirements of this section.

(Ord. 5002 § 2, 2008)

16.12.055 Appeals.

Denial of any application for an exemption and/or adjustment to the provisions of recycled water use may be appealed to the city manager or his/her designee, whose decision shall be final. An application for appeal shall be filed with the city clerk in writing within ten business days after the director of public works' decision and shall state the specific grounds for the appeal. The city manager or his/her designee shall hear the appeal within sixty calendar days after the appeal has been filed with the city clerk and shall issue a written decision within thirty days.

(Ord. 5002 § 2, 2008)

16.12.060 Failure to comply with this chapter.

In addition to existing penalties in state and local law for violation of the provisions of this chapter, the city manager or his/her designee may assess the following penalties, subject to the appeal provisions set forth above:

(a) A water service surcharge of fifty percent of the general water service rate, as set forth in utility rate schedule, for each billing period during which potable water is used for irrigation.

(b) Continued use of potable water for irrigation, after a written warning by the city manager or his/her designee, may result in the discontinuation of water service supplied for irrigation by the city following a noticed hearing. A charge as set forth in the city's administrative fee schedule shall be paid prior to the reactivation or restoration of water service.

(c) Any use of recycled water in a manner contrary to the provisions of this chapter, is hereby declared to be a nuisance and may be abated in the manner provided for the abatement of nuisances in Chapter 9.56 of the Palo Alto Municipal Code.

(Ord. 5002 § 2, 2008)

16.12.065 Monitoring.

Representatives of the city and the San Francisco Bay Regional Water Quality Control Board shall be authorized to enter the premises of any recycled water user to carry out inspections and monitoring to assure compliance with this chapter and applicable state of California regulations.

(Ord. 5002 § 2, 2008)

16.12.070 Severability.

If any provision or clause of this chapter is held to be unconstitutional or otherwise invalid by any court of competent jurisdiction, such invalidity shall not affect other provisions of this chapter, and clauses of this chapter are declared to be severable.

(Ord. 5002 § 2, 2008)

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▸Contents — Palo Alto Municipal Code
Palo Alto Municipal Code
  1. Article VIII — A. Board of Education
  2. Title 1 — GENERAL PROVISIONS
  3. Title 2 — ADMINISTRATIVE CODE
  4. Title 4 — BUSINESS LICENSES AND REGULATIONS
  5. Title 5 — HEALTH AND SANITATION
  6. Title 6 — ANIMALS
  7. Title 8 — TREES AND VEGETATION
  8. Title 9 — PUBLIC PEACE, MORALS AND SAFETY
  9. Title 10 — VEHICLES AND TRAFFIC
  10. Title 11 — ENVIRONMENTAL IMPACT PROCEDURE
  11. Title 12 — PUBLIC WORKS AND UTILITIES
  12. Title 13 — IMPROVEMENT PROCEDURE
  13. Title 15 — FIRE PREVENTION
  14. ▸Title 16 — BUILDING REGULATIONS
    Overview
    1. 16.04 California Building Code, California Code of Regulations…
    2. 16.05 California Mechanical Code, California Code of Regulatio…
    3. 16.08 California Plumbing Code, California Code of Regulations…
    4. 16.09 Sewer Use Ordinance
    5. 16.10 Private Sewage Disposal Systems
    6. 16.11 Stormwater Pollution Prevention
    7. 16.12 Recycled Water
    8. 16.13 Requirements for Food Facilities Related to Water Pollut…
    9. 16.14 California Green Building Standards Code, California Cod…
    10. 16.15 Electric Vehicle Charging Stations
    11. 16.17 California Energy Code, California Code of Regulations, …
    12. 16.19 California Historical Building Code, California Code of …
    13. 16.20 Signs
    14. 16.24 Fences
    15. 16.28 Excavations, Grading and Fills
    16. 16.32 Moving and Relocating Buildings
    17. 16.36 House Numbering
    18. 16.38 Certificate of Use and Occupancy for Community Housing
    19. 16.40 Unsafe Buildings
    20. 16.42 Seismic Hazards Identification Program
    21. 16.44 Fallout Shelters
    22. 16.45 Transportation Impact Fee for New Nonresidential Develop…
    23. 16.46 Approval of Projects with Impacts on Traffic in the San …
    24. 16.47 Reserved
    25. 16.48 Reserved
    26. 16.49 Historic Preservation
    27. 16.50 Reserved
    28. 16.52 Flood Hazard Regulations
    29. 16.56 Handicapped Access Regulations - Appeal
    30. 16.57 In-Lieu Parking Fee for New Nonresidential Development i…
    31. 16.58 Development Impact Fees
    32. 16.59 Citywide Transportation Impact Fee
    33. 16.60 Charleston Arastradero Corridor Pedestrian and Bicyclist…
    34. 16.61 Public Art for Private Developments
    35. 16.62 Expired Permits for Residential Construction and Demolit…
    36. 16.63 Small Residential Rooftop Solar Energy Systems
    37. 16.64 Development Fee and In-lieu Payment Administration
    38. 16.65 Citywide Affordable Housing Requirements
    39. 16.66 Hauled Liquid Waste
    40. Chapter 16.04 — CALIFORNIA BUILDING CODE, CALIFORNIA CODE OF
    41. Chapter 16.05 — CALIFORNIA MECHANICAL CODE, CALIFORNIA CODE OF
    42. Chapter 16.08 — CALIFORNIA PLUMBING CODE, CALIFORNIA CODE OF
    43. Chapter 16.09 — SEWER USE ORDINANCE
    44. Chapter 16.10 — PRIVATE SEWAGE DISPOSAL SYSTEMS
    45. Chapter 16.11 — STORMWATER POLLUTION PREVENTION
    46. Part 2 — General Provisions
    47. Part 3 — Development Projects
    48. Part 10 — Copper Controls
    49. Part 3 — Development Projects
    50. Part 4 — Required Best Management Practices for All Dischargers
    51. Part 5 — Illicit Discharge Detection and Elimination and Mobil…
    52. Part 6 — Pesticides Toxicity Control
    53. Part 7 — Trash Load Reductions
    54. Part 8 — Mercury Controls
    55. Part 9 — Polychlorinated Biphenyls (PCBs) Controls
    56. Part 10 — Copper Controls
    57. Chapter 16.12 — RECYCLED WATER
    58. Chapter 16.13 — REQUIREMENTS FOR FOOD FACILITIES RELATED TO WA…
    59. Part 6 — Rooftop Grease Containment System Requirements
    60. Part 11 — Food Facility Closure or Ownership Change
    61. Part 3 — Authority to Inspect and Enforce
    62. Part 4 — Prohibited Discharges, Devices, and Connections
    63. Part 5 — Grease Control Device Requirements
    64. Part 6 — Rooftop Grease Containment System Requirements
    65. Part 7 — Waste Oil Management Requirements
    66. Part 8 — Spill Response Requirements
    67. Part 9 — Best Management Practices for Existing Facilities
    68. Part 10 — Mobile Food Facilities
    69. Part 11 — Food Facility Closure or Ownership Change
    70. Chapter 16.14 — CALIFORNIA GREEN BUILDING STANDARDS CODE,
    71. Part 1 — General
    72. Chapter 4 — RESIDENTIAL
    73. Chapter 7 — INSTALLER AND SPECIAL
    74. Part 7 — Local Modifications to
    75. Chapter 5 — NONRESIDENTIAL
    76. Part 9 — Local Modifications to
    77. Part 1 — General
    78. Chapter 1 — ADMINISTRATION
    79. Chapter 2 — DEFINITIONS
    80. Chapter 3 — GREEN BUILDING
    81. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
    82. Chapter 7 — INSTALLER AND SPECIAL INSPECTOR QUALIFICATIONS
    83. Part 7 — Local Modifications to
    84. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
    85. Part 9 — Local Modifications to
    86. Chapter 16.16 — CALIFORNIA ELECTRICAL CODE, CALIFORNIA CODE OF
    87. Chapter 16.17 — CALIFORNIA ENERGY CODE, CALIFORNIA CODE OF
    88. Chapter 16.19 — CALIFORNIA HISTORICAL BUILDING CODE, CALIFORNI…
    89. Chapter 16.20 — SIGNS
    90. Chapter 16.20 — Table 1
    91. Chapter 16.20 — Table 2
    92. Chapter 16.20 — Table 2
    93. Chapter 16.20 — Table 3
    94. Chapter 16.24 — FENCES
    95. Chapter 16.28 — GRADING AND EROSION AND SEDIMENT CONTROL
    96. Chapter 16.32 — MOVING AND RELOCATING BUILDINGS
    97. Chapter 16.36 — HOUSE NUMBERING
    98. Chapter 16.38 — CERTIFICATE OF USE AND OCCUPANCY FOR COMMUNITY
    99. Chapter 16.40 — UNSAFE BUILDINGS
    100. Chapter 16.44 — FALLOUT SHELTERS
    101. Chapter 16.45 — TRANSPORTATION IMPACT FEE FOR NEW NONRESIDENTIAL
    102. Chapter 16.46 — APPROVAL OF PROJECTS WITH IMPACTS ON TRAFFIC I…
    103. Chapter 16.48 — RESERVED
    104. Chapter 16.49 — HISTORIC PRESERVATION
    105. Chapter 16.50 — RESERVED
    106. Chapter 16.52 — FLOOD HAZARD REGULATIONS
    107. Chapter 16.56 — HANDICAPPED ACCESS REGULATIONS - APPEAL
    108. Chapter 16.57 — IN-LIEU PARKING FEE FOR NEW NONRESIDENTIAL DEV…
    109. Chapter 16.58 — DEVELOPMENT IMPACT FEES
    110. Chapter 16.59 — CITYWIDE TRANSPORTATION IMPACT FEE
    111. Chapter 16.60 — CHARLESTON ARASTRADERO CORRIDOR PEDESTRIAN
    112. Chapter 16.61 — PUBLIC ART FOR PRIVATE DEVELOPMENTS
    113. Chapter 16.62 — EXPIRED PERMITS FOR RESIDENTIAL CONSTRUCTION AND
    114. Chapter 16.63 — SMALL RESIDENTIAL ROOFTOP SOLAR ENERGY SYSTEMS
    115. Chapter 16.64 — DEVELOPMENT FEE AND IN-LIEU PAYMENT ADMINISTRA…
    116. Chapter 16.66 — HAULED LIQUID WASTE
  15. Title 17 — HAZARDOUS MATERIALS STORAGE
  16. Title 18 — ZONING
  17. Title 19 — MASTER PLAN
  18. Article 7 — AUTHORITY FOR AND SCOPE OF MASTER OR GENERAL PLANS.
  19. Article 8 — PROCEDURE FOR ADOPTION OF MASTER OR GENERAL PLAN.
  20. Chapter 19.06 — SPECIFIC PLANS
  21. Chapter 19.10 — COORDINATED AREA PLANS
  22. Title 20 — PRECISE PLANS
  23. Title 21 — SUBDIVISIONS AND OTHER DIVISIONS OF LAND
  24. Title 22 — PARKS

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