These drought tolerant landscaping figures cover the measurement periods and populations identified in the available source material. Estimates, surveys and forecasts retain their reported scope.
Key Drought Tolerant Landscaping Statistics
The main findings are:
- Las Vegas Valley averages 4.5 inches of annual precipitation (study context, 2001-2005; Las Vegas Valley, Nevada).
- Turf-to-xeric conversion saved 55.8 gallons per square foot annually (five-year study, 2001-2005; Las Vegas Valley, Nevada).
- Xeric properties reported 26.4 fewer annual labor hours than turf-dominated properties (five-year study, 2001-2005; Las Vegas Valley, Nevada).
- The published Ankara comparison reports 90,591 m3 annual water consumption for Bademlidere before the proposed xeriscape redesign (2026 study scenario; Bademlidere, Ankara, Türkiye).
- In the Ankara model, clover groundcover consumed 1.31 m3/m2/year when maintained green (2026 study scenario; Ankara, Türkiye).
- The Sacramento field assessment covered 100 census tracts (study field assessment; Sacramento, California).
- Las Vegas Valley’s annual evapotranspirational water requirement is nearly 90 inches (study context, 2001-2005; Las Vegas Valley, Nevada).
- Converted homes reduced annual total household water use by 30% (five-year study, 2001-2005; Las Vegas Valley, Nevada).
- Xeric properties reported $206 lower direct annual maintenance expenditures than turf-dominated properties (five-year study, 2001-2005; Las Vegas Valley, Nevada).
- The Ankara comparison reports 185,566 m3 annual water consumption for Batıkent before redesign (2026 study scenario; Batıkent, Ankara, Türkiye).
- In the Ankara model, turfgrass consumed 1.14 m3/m2/year (2026 study scenario; Ankara, Türkiye).
- Landscape irrigation typically accounts for 60%-90% of single-family residential water use in desert Southwest cities (study context, 2001-2005; Desert cities of the U.S. Southwest).
- The 30% household reduction equated to 96,000 gallons annually per converted home in the study’s comparison (five-year study, 2001-2005; Las Vegas Valley, Nevada).
- EPA’s New Mexico example assigns traditional landscaping 25 gallons per square foot per season of supplemental water (EPA guidance example).
- The proposed Batıkent xeriscape design reduced annual demand to 82,835 m3 (2026 study scenario; Batıkent, Ankara, Türkiye).
Contents
- Key Drought Tolerant Landscaping Statistics
- Drought tolerant landscaping statistics: water demand and climate differences
- Xeriscape conversion statistics: residential water savings
- Water-wise landscape costs, labor and maintenance statistics
- Campus and public-space drought tolerant landscaping data
- Drought tolerant landscaping: plant, turf and irrigation comparisons
- Drought tolerant landscaping statistics: adoption and neighborhood patterns
Drought tolerant landscaping statistics: water demand and climate differences
- Las Vegas Valley averages 4.5 inches of annual precipitation (study context, 2001-2005; Las Vegas Valley, Nevada). (An in-depth investigation of Xeriscape…)
- Las Vegas Valley’s annual evapotranspirational water requirement is nearly 90 inches (study context, 2001-2005; Las Vegas Valley, Nevada). (An in-depth investigation of Xeriscape…)
- Landscape irrigation typically accounts for 60%-90% of single-family residential water use in desert Southwest cities (study context, 2001-2005; Desert cities of the U.S. Southwest). (An in-depth investigation of Xeriscape…)
- Measured turf ET was 0.6-1.3 mm/day in humid-city lawns (field measurements, 2018-2019; Boston, Minneapolis-St. Paul, Baltimore and Miami residential lawns). (Evapotranspiration of Residential Lawns Across…)
- Measured turf ET was 2.2-3.6 mm/day in hot, dry-city lawns (field measurements, 2018-2019; Los Angeles and Phoenix residential lawns). (Evapotranspiration of Residential Lawns Across…)
- The residential lawn study measured 79 yards across six U.S. cities (field measurements, 2018-2019). (Evapotranspiration of Residential Lawns Across…)
- The study targeted 16 yards per city, with four yards per landscape type; Boston contributed 12 yards because water-conserving yards were absent (field measurements, 2018-2019; Six U.S. cities). (Evapotranspiration of Residential Lawns Across…)
Climate context, not a landscaping outcome.
Evapotranspirational requirement, not metered use.
Broad cited range across cities and studies.
79-yard study across six cities; turf ET only.
Small, purposive field sample; not a national prevalence estimate.
Design counts are context, not outcome statistics.
Xeriscape conversion statistics: residential water savings
- Turf-to-xeric conversion saved 55.8 gallons per square foot annually (five-year study, 2001-2005; Las Vegas Valley, Nevada). (An in-depth investigation of Xeriscape…)
- Converted homes reduced annual total household water use by 30% (five-year study, 2001-2005; Las Vegas Valley, Nevada). (An in-depth investigation of Xeriscape…)
- The 30% household reduction equated to 96,000 gallons annually per converted home in the study’s comparison (five-year study, 2001-2005; Las Vegas Valley, Nevada). (An in-depth investigation of Xeriscape…)
- A 12-year panel of monthly bills covered 300,000 Las Vegas households (Las Vegas, Nevada). (How Smart Are Water Smart…)
- Water Smart Landscapes participation reduced treated-household consumption by 18% (12-year panel; Las Vegas, Nevada). (How Smart Are Water Smart…)
- The evaluated program cost the water authority about $1.62 per 1,000 gallons saved under its assumed benefit horizon (12-year panel evaluation; Las Vegas, Nevada). (How Smart Are Water Smart…)
- Outdoor water use is described as 60%-65% of residential demand in arid areas (literature context). (How Smart Are Water Smart…)
- Arizona State University Tempe scenarios projected 20% water savings when 25% of lawn area was replaced with xeriscape (2023 campus scenario; ASU Tempe campus, Arizona). (Xeriscaping as a water-saving landscape…)
- The ASU Tempe scenario projected 85% savings when all grass areas were replaced with xeriscape (2023 campus scenario; ASU Tempe campus, Arizona). (Xeriscaping as a water-saving landscape…)
- The ASU study modeled four replacement levels: 25%, 50%, 75% and 100% of grass area (2023 campus scenario; ASU Tempe campus, Arizona). (Xeriscaping as a water-saving landscape…)
Study-group result for converted landscapes.
Residential conversion study; not all household water was outdoor use.
Reported equivalence from the study, not a universal savings rate.
Program evaluation population, not all U.S. households.
Difference-in-differences estimate for rebate participants.
Cost depends on assumed time horizon.
Literature range cited as background, not a new measurement by the paper.
Scenario calculation, not post-installation metering.
Scenario levels are not measured adoption rates.
Water-wise landscape costs, labor and maintenance statistics
- Xeric properties reported 26.4 fewer annual labor hours than turf-dominated properties (five-year study, 2001-2005; Las Vegas Valley, Nevada). (An in-depth investigation of Xeriscape…)
- Xeric properties reported $206 lower direct annual maintenance expenditures than turf-dominated properties (five-year study, 2001-2005; Las Vegas Valley, Nevada). (An in-depth investigation of Xeriscape…)
- EPA’s New Mexico example assigns traditional landscaping 25 gallons per square foot per season of supplemental water (EPA guidance example). (Water Conservation Guidelines for Landscaping)
- EPA’s water-wise New Mexico example assigns 5-10 gallons per square foot per season of supplemental water (EPA guidance example). (Water Conservation Guidelines for Landscaping)
- The EPA example’s water-wise range is 15-20 gallons per square foot per season below its 25-gallon traditional example (EPA guidance example; New Mexico example). (Water Conservation Guidelines for Landscaping)
- EPA describes water-wise landscaping as reducing supplemental irrigation by more than 50% (EPA guidance; Southwestern landscaping guidance). (Water Conservation Guidelines for Landscaping)
- A Sacramento study reports that residential water use is more than 60% of total urban water consumption in California (literature context). (Patterns of water-wise residential landscaping…)
Reported average difference between study groups.
Direct maintenance only; reported group average.
Typical example, not a universal regional average.
Typical example, dependent on design and climate.
Arithmetic difference between EPA’s illustrative ranges; not a new field measurement.
Guidance benchmark, not a single controlled trial.
Secondary literature context in a city landscape study.
Campus and public-space drought tolerant landscaping data
- The published Ankara comparison reports 90,591 m3 annual water consumption for Bademlidere before the proposed xeriscape redesign (2026 study scenario; Bademlidere, Ankara, Türkiye). (Role of Urban Landscapes in…)
- The Ankara comparison reports 185,566 m3 annual water consumption for Batıkent before redesign (2026 study scenario; Batıkent, Ankara, Türkiye). (Role of Urban Landscapes in…)
- The proposed Batıkent xeriscape design reduced annual demand to 82,835 m3 (2026 study scenario; Batıkent, Ankara, Türkiye). (Role of Urban Landscapes in…)
- The Batıkent scenario saved 102,731 m3 annually (2026 study scenario; Batıkent, Ankara, Türkiye). (Role of Urban Landscapes in…)
- The Batıkent scenario represented a 55.4% annual water saving (2026 study scenario; Batıkent, Ankara, Türkiye). (Role of Urban Landscapes in…)
- The Batıkent saving was described as approximately the annual domestic water use of 600 households (2026 study scenario; Batıkent, Ankara, Türkiye). (Role of Urban Landscapes in…)
Search-extracted study result; modeled crop-water consumption.
Modeled crop-water consumption.
Design scenario, not post-construction metering.
Reported model result; site-specific.
Equivalence depends on assumed household water use.
Drought tolerant landscaping: plant, turf and irrigation comparisons
- In the Ankara model, clover groundcover consumed 1.31 m3/m2/year when maintained green (2026 study scenario; Ankara, Türkiye). (Role of Urban Landscapes in…)
- In the Ankara model, turfgrass consumed 1.14 m3/m2/year (2026 study scenario; Ankara, Türkiye). (Role of Urban Landscapes in…)
- The Ankara model’s clover value was 0.17 m3/m2/year higher than its turfgrass value (2026 study scenario; Ankara, Türkiye). (Role of Urban Landscapes in…)
- The Ankara model’s clover value was about 14.9% higher than its turfgrass value (2026 study scenario; Ankara, Türkiye). (Role of Urban Landscapes in…)
Modeled species comparison under green-appearance condition.
Modeled comparison; not a universal turf rate.
Arithmetic difference between two modeled values.
Derived ratio; illustrates that a lawn alternative is not automatically lower-water.
Drought tolerant landscaping statistics: adoption and neighborhood patterns
The Sacramento field assessment covered 100 census tracts (study field assessment; Sacramento, California). (Water Conservation Guidelines for Landscaping)
Study coverage count, not a citywide adoption percentage by itself.