# Start Date of Consumption

**URL:** <https://community.drivendata.org/t/start-date-of-consumption/505>\
**Category:** From Fog Nets to Neural Nets\
**Created:** [April 2, 2016, 10:30am UTC](https://community.drivendata.org/t/start-date-of-consumption/505 "2016-04-02T10:30:47Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![avsyap](https://avatars.discourse-cdn.com/v4/letter/a/a587f6/32.png) [@avsyap](https://community.drivendata.org/u/avsyap)\
**Post date:** [April 2, 2016, 10:30am UTC](https://community.drivendata.org/t/start-date-of-consumption/505/1 "2016-04-02T10:30:47Z")

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Hi all,

Did the communities only start consuming fog net water on Jun 2015? I can’t seem to find any info on DSH’s FAQ about when the communities actually started consuming the water.

I’m asking because I noticed that the total consumption for 2015 is higher than the total yield for 2015. The only logical explanation I can think of is that the fog nets have been collecting water since 2013, but the communities have only been using it since Jun 2015. Is this correct?

Cheers,  
Andrew

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**Author:** ![bull](https://yyz2.discourse-cdn.com/flex028/user_avatar/community.drivendata.org/bull/32/8_2.png) [@bull](https://community.drivendata.org/u/bull)\
**Post date:** [April 5, 2016, 6:14pm UTC](https://community.drivendata.org/t/start-date-of-consumption/505/2 "2016-04-05T18:14:23Z")

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Hi @avsyap,

The consumption data that is available starts in June 2015, but actual use of the fog net water source started before that. The explanation for what you see is that there is not a direct connection between the units in the consumption data and the units in the yield data.

Obviously, this isn’t ideal for storytelling, and we’re working on being able to provide a conversion between the two. See this thread for details:

> [@Units of yield; total SA of nets?](http://community.drivendata.org/t/units-of-yield-total-sa-of-nets/478/5):
>
> I’m thinking of ways to bring both data sets together to show, for example, how the water captured by fog nets could offset or supplement a community’s water usage. If the communities listed in the water usage data set are currently using water collected from fog nets or are being considered as potential communities where fog-net water is available, it could be interesting to show what impact this might have on how much people are paying for water or what % of their water wouldn’t be coming fro…

Peter