Welcome to the Wailea Kai Phase III Water Calculator!
This calculator will show your estimated cost to irrigate the 8' common area landscaping strip between your lot and the street.
Please enter your information:
Enter your lot number between 1 and 100.
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Enter your Bill Period Usage (kgal) from your recent water bill.
example
Click to calculate and review your estimates.
Estimates:
Your approximate additional annual water expense if the amemdment passes: ${{ (owner_cost_after * 12).toFixed(0) }}
Approximate amount of your annual HOA dues currently used for common area strip watering: ${{ (owner_cost_before * 12).toFixed(0) }}
Gallon for gallon, each year it will cost ${{ owner_hoa_per_year_delta.toFixed(0) }} more to irrigate the strip fronting your lot if the amendment passes (owner irrigates). Gallon for gallon, each year it will cost ${{ (-owner_hoa_per_year_delta).toFixed(0) }} less to irrigate the strip fronting your lot if the amendment passes (owner irrigates). Gallon for gallon, it costs the same to irrigate the strip fronting your lot whether the HOA irrigates or the owner irrigates.
({{ heads }} sprinkler heads for the common area strip near your lot)
Other factors that may affect expenses if the amendment passes (owner irrigates):
  • HOA expense to hook up owner irrigation: ~${{ switch_cost_per_owner_min.toFixed(0) }} - ${{ switch_cost_per_owner_max.toFixed(0) }} per lot (${{ monthly_supplemental.toFixed(2)}}/month supplemental assessment for one year).
  • Owners can upgrade sprinklers to use more efficient 0.9gpm heads.
  • Owners may be able to water for 5 days/week instead of 6.
  • If zones overlap, owners may adjust them.
  • If strip is up a slope, owners may benefit from less drain-back.
  • HOA dues will not decrease. Instead the portion previously put towards strip irrigation will be put towards reserves, offsetting other costs and vendor price increases.
Other factors that may affect expenses if the amendment fails (HOA irrigates):
  • HOA expense for strip irrigation upgrades: ~${{ assessment_cost_per_owner.toFixed(0) }} per lot (${{ (monthly_supplemental).toFixed(2) }}/month supplemental assessment for three years).
    • After ~{{ break_even_years.toFixed(1) }} years it is cheaper for you if the HOA continues to irrigate.
    • The upgrades should last ~75 years with proper maintenance.
    • Note the ~${{ assessment_cost_per_owner }} is a rough estimate and isn't final. The HOA is still working on bids.
  • HOA pays for leak fixes, cost shared by all owners.
  • Pressurized main lines throughout neighborhood increase likelihood of large scale leaks.
  • Irrigation inefficiencies like slope drain-back, overlapping watering, and less precise scheduling will continue to exist.