The environmental quality standards referred to in article 2.2.1 can be established in the form of limit values and guide values.
Limit values may not be exceeded, except in the case of force majeure. Without prejudice to the other provisions of this decree, the regulations imposed determine the measures to be taken by the designated authorities in the event of excess pollution or threatening excess pollution with the objective of protecting the relative interests of the environment.
Guide values determine the environmental quality level that must be reached or maintained to the extent possible.
Limit values and guide values can be imposed separately or in combination with each other.