I'm an engineer and am probably analyzing this to death, but here goes...
I live in Las Vegas on city water. I've had Culligan come by and give me the sales pitch (they measured 21gpg).
http://www.lvvwd.com/assets/pdf/wq_summary_lvvwd.pdf (lists 16.7 gpg, iron < 100ppb).
Family of 3.5, new house with all low flow showers, high efficiency appliances. Average water bills over 6 months (including drip irrigation) is 3500-4000 gallons/mo. So 3750 gal/mo / 30 days / 3.5 people = 35 gal/day/person. Taking out ~20% for irrigation leaves 30 gal/day/person. Is this crazy low? Everything I read is saying 75 gallons per person.
Presuming that 30 gal/day is correct: 3 people * 30 gal/day * 18 gpg = 1620 grains / day. If my daughter is home from college, then 4 * 40 * 18 = 2880 grains / day.
Sound right?
I live in Las Vegas on city water. I've had Culligan come by and give me the sales pitch (they measured 21gpg).
http://www.lvvwd.com/assets/pdf/wq_summary_lvvwd.pdf (lists 16.7 gpg, iron < 100ppb).
Family of 3.5, new house with all low flow showers, high efficiency appliances. Average water bills over 6 months (including drip irrigation) is 3500-4000 gallons/mo. So 3750 gal/mo / 30 days / 3.5 people = 35 gal/day/person. Taking out ~20% for irrigation leaves 30 gal/day/person. Is this crazy low? Everything I read is saying 75 gallons per person.
Presuming that 30 gal/day is correct: 3 people * 30 gal/day * 18 gpg = 1620 grains / day. If my daughter is home from college, then 4 * 40 * 18 = 2880 grains / day.
Sound right?