Suburban Water Self-Sufficiency — FarmPal

Reduce municipal water consumption by 50-70% through rainwater harvesting, greywater recycling, and drought-resistant landscaping on a standard suburban lot.

Principles

  • Outdoor irrigation is 30-50% of suburban water use address first
  • A 1,500 sq ft roof captures 935 gallons per inch of rain
  • Greywater from laundry and showers safely irrigates trees and shrubs
  • Mulch reduces irrigation needs 50-70% compared to bare soil
  • Drip irrigation uses 30-50% less water than sprinklers with better results

Action steps

  1. Install rain barrels on every downspout

    55-gallon barrels ($30-60) on 2-4 downspouts. Link in series. Elevate on cinder blocks for gravity-fed drip irrigation. First-flush diverters keep debris out.

  2. Convert sprinklers to drip

    Drip delivers water to root zones at 90% efficiency (vs 50-60% sprinklers). Timer-based drip is hands-free.

  3. Redirect laundry greywater

    Washing machine drain to 1" poly tubing to mulch basins around fruit trees. Legal without permit in many states. Use biocompatible detergent.

  4. Mulch everything

    4-6 inches of wood chips on all beds and around trees. Reduces evaporation 50-70%, suppresses weeds. Free chips from arborists (ChipDrop.in).

Benefits

  • Reduces water bills 50-70%
  • Garden survives water restrictions
  • Rainwater is better for plants (no chlorine)
  • Mulching improves soil health

Further reading

  • Rainwater Harvesting for Drylands Brad Lancaster
  • Create an Oasis with Greywater Art Ludwig