Key:water_volume
 water_volume
|
| Description |
|---|
Volume of a water reserve, applicable only to water tanks and swimming pools. 
|
| Group: properties |
| Used on these elements |
    |
| See also |
Status: approved
|
| Tools for this tag |
This key has been introduced to specify the (permanent) volume of water in a tank or pool as part of the proposal "Fire hydrant extensions part 2" [1] in 2017. It is a duplicate of water_tank:volume=* which has been introduced earlier (2012) without prior proposal.
Although never officially approved water_tank:volume=* has been used 15400 times as per 2026/02, compared to 434 uses of water_volume=*.
To avoid confusion the use of water_volume=* is not recommended. Consider using the more common water_tank:volume=* instead, or alternatively the generic capacity=* which can be applied to all kinds of storage tanks, including emergency water tanks and reservoirs.
See also
capacity=* - a very generic tag used for various kinds of objects, including all kinds of storage tanks.
Related forum discussion
https://community.openstreetmap.org/t/deprecate-water-volume-in-favour-of-water-tank-volume/141117.