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Division 10 — SOIL AND WATER CONSERVATION›Chapter 4 — WATER CONSERVATION

810.0425 Water Efficient Landscape Worksheet.

Yucaipa Zoning Code · 2026-06 edition · updated 2026-09-10 · Yucaipa

(a) A project applicant shall complete the Water Efficient Landscape Worksheet in Appendix A which contains information on the plant factor, irrigation method, irrigation efficiency, and area associated with each hydrozone. Calculations are then made to show that the evapotranspiration adjustment factor (ETAF) for the landscape project does not exceed a factor of 0.55 for residential areas and 0.45 for non-residential areas, exclusive of Special Landscape Areas. The ETAF for a landscape project is based on the plant factors and irrigation methods selected. The Maximum Applied Water Allowance is calculated based on the maximum ETAF allowed (0.55 for residential areas and 0.45 for non-residential areas) and expressed as annual gallons required. The Estimated Total Water Use (ETWU) is calculated based on the plants used and irrigation method selected for the landscape design. ETWU must be below the MAWA.

(b) In calculating the Maximum Applied Water Allowance and Estimated Total Water Use, a project applicant shall use the following ETo values:

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual ETo
2.0 2.3 3.4 4.4 6.1 7.1 7.6 7.9 6.0 3.9 2.6 1.7 55.0

(c) Water budget calculations shall adhere to the following requirements:

(1) The plant factor used shall be from WUCOLS or from horticultural researchers with academic institutions or professional associations as approved by the California Department of Water Resources (DWR). The plant factor ranges from 0 to 0.1 for very low water using plants, from 0.1 to 0.3 for low water use plants, from 0.4 to 0.6 for moderate water use plants, and from 0.7 to 1.0 for high water use plants.

(2) All water features shall be included in the high water use hydrozone and temporarily irrigated areas shall be included in the low water use hydrozone.

(3) All Special Landscape Areas shall be identified and their water use calculated as shown in Appendix A.

(4) ETAF for new and existing (non-rehabilitated) Special Landscape Areas shall not exceed 1.0. (Amended by Ord. 338 § 1, 2015; Ord. 293 § 3, 2009)

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▸Contents — Yucaipa Zoning Code
Yucaipa Zoning Code
  1. Division 1 — GENERAL PROVISIONS
  2. Division 2 — REVIEWING AUTHORITIES
  3. Division 3 — PROCEDURES
  4. Division 1
  5. Division 2
  6. Division 3
  7. Division 4
  8. Division 5
  9. Division 6
  10. Division 7
  11. Division 4 — LAND USES
  12. Division 6 — PLANNING AREAS
  13. Division 7 — GENERAL DESIGN STANDARDS
  14. Division 8 — SPECIFIC USE DESIGN STANDARDS
  15. Division 9 — PLANT PROTECTION AND MANAGEMENT
  16. ▸Division 10 — SOIL AND WATER CONSERVATION
    Overview
    1. Chapter 1 — SURFACE MINING AND LAND RECLAMATION
    2. Chapter 2 — EROSION AND SEDIMENT CONTROL
    3. Chapter 3 — WIND-BORNE SOIL EROSION
    4. ▸Chapter 4 — WATER CONSERVATION
      Overview
      1. 810.0401 Findings and Purpose.
      2. 810.0405 Applicability.
      3. 810.0410 Definitions.
      4. 810.0415 Compliance with Landscape Documentation Package.
      5. 810.0420 Elements of the Landscape Documentation Package.
      6. 810.0425 Water Efficient Landscape Worksheet.
      7. 810.0430 Soil Management Report.
      8. 810.0435 Landscape Design Plan.
      9. 810.0440 Irrigation Design Plan.
      10. 810.0445 Grading Design Plan.
      11. 810.0450 Certificate of Completion.
      12. 810.0455 Irrigation Scheduling.
      13. 810.0465 Irrigation Audit, Irrigation Survey, and Irrigation W…
      14. 810.0470 Irrigation Efficiency.
      15. 810.0475 Recycled Water.
      16. 810.0480 Graywater Systems.
      17. 810.0490 Public Education.
      18. 810.0495 Existing Landscaping: Irrigation Audit, Irrigation Su…
      19. 810.0500 Water Waste Prevention.
      20. 810.0505 Effective Precipitation.
      21. 810.0510 Appendices.
    5. Chapter 5 — ONSITE WASTEWATER TREATMENT SYSTEMS
  17. Division 11 — PUBLIC FACILITIES FINANCING

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