Here is a PDF of the infographics:
The following infographic generated some controversy:
Friend and alert reader Peter Boddie emailed to let me know that this graphic is grossly misleading. He estimated that there are about 76,000 drops per gallon, so at one drip per second and with 31,557,600 seconds per year yields 415 gallons per year.
A far cry from 27,000 gallons per year!
I thought Peter's figure might be a bit low, so I used the USGS calculator and got about 2,100 gallons per year. The USGS assumed a larger volume for a drop (0.25 mL) than Peter did, which yields about 15,100 drips per gallon (check this converter).
I got about the same figure as the USGS's doing the calculations by hand.
A faucet dripping just once per second will waste as much as 2,700 gallons of water per year.
Looks like the 'smarter water management folks cannot transpose figures correctly.
Upshot: Estimating the water wasted by a leaking faucet is not straightforward unless you actually measure it. But 27,000 gallons per year comes from a HUGE faucet!
Makes me wonder about the validity of the other figures; I have not checked them.
I have informed IBM of this issue.
See Chris Maxwell-Gaines' comment on the original post.
Good lesson for me on checking figures and graphics I use.
"I like to do great stuff with simple things." - Djeevan Schiferli, IBM Smarter Water Management expert