The 100 gal/person/day is outdated or includes non-residential water usage (e.g. water used to produce the goods that you use).
With more modern fixtures and appliances, the average residential use is closer to 30-40 gal/person/day. You'd also expect less water usage during the winter where there is no water usage for residential landscaping.
Old toilets used to require 7+ gal/flush, now the standard is 6 liter/flush (1.6 gal). Washing machines are similarly more efficient. Many places still cite old water usage estimates. The US uses less water than it did in the 1970's, despite having 50% more people.
ArdernLockett t1_ixpqrzm wrote
Reply to comment by movdqa in How much water do you use per person per day? by movdqa
The 100 gal/person/day is outdated or includes non-residential water usage (e.g. water used to produce the goods that you use).
With more modern fixtures and appliances, the average residential use is closer to 30-40 gal/person/day. You'd also expect less water usage during the winter where there is no water usage for residential landscaping.
Old toilets used to require 7+ gal/flush, now the standard is 6 liter/flush (1.6 gal). Washing machines are similarly more efficient. Many places still cite old water usage estimates. The US uses less water than it did in the 1970's, despite having 50% more people.
Edit: 1970's not 1907's