Even if no specific legislation for drinking water exists, there are some mandatory requirements in the current regulation affecting livestock production that need to be observed:

• The farm needs to have a clear-water supply. The microorganism values must specifically be within the legal limits imposed by the Royal Decree 140/2003 from the 7^th February, which established the health criteria for the quality of water intended for human consumption
• Watering equipment needs to be strategically placed in order to reduce up to its maximum the contamination risk.
• All the animals must have an easy and direct access to water.

In order to meet the mentioned requirements, the next hygiene practices should be followed:

• The drinking troughs need to maintain hygiene and have to be regularly cleaned.
• Prevent the water from mixing with the animal defecation.
• In case of having water accumulation tanks, pay attention to their maintenance and clean them at least once a year. In addition, they need to be permanently covered.
• In case water does not come from the public water system, water analysis need to be periodically run and make sure the drinking water is not contaminated.