Afew months ago, I wrote about new research done on residential water usage and how changing the estimated daily water use can impact system design, including septic tank size and soil treatment and dispersal area.
The research showed a decrease in average water use by a household from the previous estimate of 75 gallons per day per person. But questions remain whether this should result in changes to water use estimates for design purposes. The 75-gpd estimated water use per person was based on the flush toilet using 5 or more gallons per flush. Now the federal plumbing standard specifies the
