Cell towers in Poissy (Yvelines)

Supports leave a gap of about 1.6 km to the south-west of the centre. 1 support is declared underground, in a gallery or a tunnel. For questions about exposure, see the exposure guide.

1 underground or tunnel site and 20 buildings and 3 pylons carry the commune's antennas.

Place names on the register include Stade Beauregard 76 Avenue Blanche de Castille, Cite du Clos D Arcy, Avenue du Marechal Lyautey, SNCF Gare de Frêt, Chem de la Bidonniere au Poult and 2 rue Charles Edouard Jeanneret.

15 systems were switched on in the past 12 months. ANFR has approved one new site that is not live yet, plus additions on 4 existing masts. New: Free Mobile (4G and 5G, including 5G at 3.5 GHz) at 117 Rue Saint Sebastien. 13 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

The commune owns 4 of the 24 masts, On Tower France owns 1.

2015 was the busiest year, with 43 new systems, most of them 4G. Bouygues Telecom opened 5G here in November 2020; SFR followed in December 2020, Free Mobile followed in December 2020. The oldest transmitter still listed here goes back to 1996.

3.5 GHz 5G is declared by Free Mobile on 8 of its 9 masts, SFR on 7 of its 9 masts, Bouygues Telecom on 6 of its 7 masts and Orange on 5 of its 7 masts.

Nearby, Carrieres-sous-Poissy (2.4 km to the north) has only 9 masts.

20 of the 24 masts are rooftop-mounted. The tallest support is 47 m (building). The median height of measured supports is 27 m.

Of the 24 masts in the commune, Free Mobile is the only carrier on 7 masts.

By mast count, Poissy is 7th of the 62 Yvelines towns that have five or more. With 24 masts for 40,983 residents, or 6 per 10,000, it has fewer masts per inhabitant than the median for those towns (7).

At 13 km² with 40,983 residents, the commune is dense enough that most antennas sit on rooftops rather than pylons. It is part of the CU Grand Paris Seine et Oise intercommunal grouping.

Source: operator declarations to ANFR, as of October 2026. Projects that are only approved are left out of the totals.