## Drinkable water

Fill in the questionnaire**The new data collection has started!** After a preliminary phase, here is a new questionnaire you can take part in from the **25 ^{th} of May** to the

**20**. Help us collect new data on the counters, answer the few simple questions of "

^{th}of July**HOW MUCH WATER DO YOU USE?!**" to get more precise data on your domestic consumption!

### How to read the water meter

#### Types of water meters

The types of water meters mounted in homes can be of three types:

**Hand counters**;

**Direct reading**;

**Electronic**.

**one**or

**two**: in the first case you have the autonomous boiler in the house and this means that the hot water you produce by yourself and therefore this single meter measures the consumption of incoming cold water; while if you have two meters it is because the hot water is produced by a condominium boiler so you will find a meter for hot water and one for cold water, both inlet.

#### If you have a HAND COUNTER:

- Start with the 4 watches with the
**black hands**representing the__integers__(they measure the thousands, hundreds, tens and units respectively). Proceeding**clockwise**to the**left**(from the dial with indicated × 1000) mark the numbers indicated by the arrow and multiply them.- the first× 1000 m³
- the second × 100 m³
- the third × 10 m³
- the fourth × 1 m³

**Attention:**if the hand is**between two numbers**, mark the lowest number (already exceeded by the hand) not the one yet to be reached! - Switch to 3 watches with
**red hands-counter**that show__decimal numbers__(measure hectoliters, decaliters and liters), sign the numbers and multiply- the first × 0,1 m³
- the second × 0,01 m³
- the third × 0,001 m³

Thought the hand-counter is**between two numbers**, you have to sign the lowest number (already exceeded by the hand) not the one yet to be reached! **Add up**everything you have signed and observed your m³ consumed!

es. 00240 + (9 × 0,1) + (9 × 0,01) + (4 × 0,001) + (5 × 0,0001)= 240,9945 m³**Convert**to__litres__(1 m³ = 1000 l), so multiply the value obtained × 1000. es. 240,9945 m³ × 1000 = 240994,5 l

#### If you have a NUMBERING, DIAL or DIRECT READING COUNTER:

- Start from the
__left__and read the**black numbers**shown in the**dial**represent the__whole numbers__in m³ (ignore the zeros on the left of the first number!)**Attention:**if the figure is not well aligned, you have to sign the lowest number! - Read the
**red numbers**, (to the right of the dial) they represent the__decimals__in m³ often separated from the previous ones by a__comma__.

If you have 4**red hands**representing decilitres, litres, decaliters and hectolitres, you have to multiply- the
__leftmost__number × 0,0001 m³ - the second × 0,001 m³
- the third × 0,01 m³
- the fourth × 0,1 m³

- the
**Convert**all your numbers from m³__into liters__(1m³ = 1000 l), so you have to multiply your result × 1000. es. 240,9945 m³ × 1000 = 240994,5 l

**Sources:**

### First detection results

From 9 to 24 May we made a first data collection, these are some of the results obtained (click to zoom).

### Questionnaire status

Answers received: 63 - Last reply on 07/21/2020 at 7:47:10 (UTC +1)

### Did you know that...

Of the 1,4 billion km^{3} of water on the water, only the 2,5% is fresh water. Of this volume the 70% is imprisoned in the ice and snow in the mountains, Antarctic and Arctic regions. So the water to us is truly residual, despite this the consumption of this material is very high. In fact it has grown of 600%within a century, this number can be explained with the increase of the temperature and with the waste of every single citizen.
Among the 28 countries of European Union, Italy has the Italy has the largest annual withdrawal of water for drinking per capita: 156 cubic meters per inhabitant, this number also grows exponentially if we consider the virtual water wasted (water used to produce food and make industries work) this number reaching 6˙309 litres per capita per day.

**Bibliography:**

- P. H. Gleick - Encyclopedia of Climate and Weather;
- Utilizzo e qualità della risorsa idrica in Italia (Istat 10-2019)
- Emanuele Bompan, Federica Fragapane, Marirosa Iannelli, Riccardo Pravettoni, Atlante geopolitico dell'Acqua: Water grabbing, diritti, sicurezza alimentare ed energia; HOEPLI: Milano;
- Consumiamo il 600% in più di acqua rispetto al secolo scorso (Repubblica 22-03-2018)