From 1987 to 1999, 15 natural and 7 artificial water bodies were investigated by the Province of Milan, such as the Lambro Settentrionale river, the Ticino river, the Olona river, the Seveso torrent, the Adda river and the Naviglio Grande, for a total of 31 sampling stations. The Data set contains all the analytical checks carried out in the period, pursuant to the LR. 32/80. In implementation of this law, a series of chemical - physical - biological parameters were detected on the main waterways of the territory of the then province of Milan. With the enactment of Legislative Decree 152/99, both the criteria for evaluating the water quality of surface water bodies and the monitoring parameters and methods have completely changed. Following that law, checks are carried out by ARPA.
