Government Regulation No. 20/1990 on Water Pollution Control.

The Regulation is divided into the following Chapters: General Definitions (I); Making an Inventory of Quality and Quantity of Water (II); Water Grouping (III); Control (IV); Licensing (V); Supervision and Monitoring (VI); Financing (VII); Sanction (VIII); Transitional Provisions (IX); Concluding Provision (X).
The Regulation aims at assuring and controlling the quality of water. To these ends it makes provisions for the inventory of quality and quantity of water, for the designation of a technical department by the Governor and the arrangement of data collected.
The water shall be grouped as follows: Group A: potable water without previous treatment; Group B: standard drinking water; Group C: water to be used for fishery or cattle-breeding purposes; Group D: water to be used for agricultural purposes, as well as for urban, business industry or hydraulic power plant. The Minister assigned to manage the living environment shall establish the quality standard of liquid waste, to be reviewed at least once every five years. The disposal of waste into the water is subject to the granting of a permit by the Governor, whereas the disposal of household waste shall be regulated by Regional Regulation and the disposal of liquid waste into the sea shall be regulated in separate Regulation. The quality of water shall be monitored by the Governor/Head of Province, according to the criteria set out in article 30.