From here its course runs through the communes Montano Lucino, Grandate, Civello, Casnate con Bernate, Portichetto, Fino Mornasco, Cucciago, Vertemate con Minoprio, Asnago, Carimate, Cimnago, Lentate sul Seveso, Camnago, Barlassina, Seveso, Cesano Maderno, Binzago, Bovisio-Masciago, Varedo, Palazzolo Milanese, Paderno Dugnano, Cusano Milanino, Cormano, Bresso.

Finally, at Milan, it joins with the canal called the Naviglio Martesana which flows into the Lambro.

The Seveso is sometimes called il fiume nero, or "the black river," on account of the colour it acquires from industrial pollutants.

The beyond Seveso brianzolo, ( of Brianza), consists of the municipalities of Cermenate, Lazzate, Misinto, Cogliate, Ceriano Laghetto, Solaro and Limbiate.

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