Cell towers in Carrieres-sur-Seine (Yvelines)

2 supports are declared underground, in a gallery or a tunnel. For questions about exposure, see the exposure guide.

2 underground or tunnel sites and 5 buildings and 2 pylons carry the commune's antennas.

Declared locations include Entre la Route St Germain et rue des Vignes Blanches, Barrière de Péage de Carrières S/ Seine, 1 H Rue de Buzenval, Les Alouettes, 19 Rue des Entrepreneurs and 45 Rue des Entrepreneurs.

ANFR has approved 2 new sites that are not live yet, plus additions on 3 existing masts. New: Bouygues Telecom (4G and 5G) at Golf Club and SFR (4G and 5G, including 5G at 3.5 GHz) at L'Île Fleurie. 4 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

2022 was the busiest year, with 18 new systems, most of them 4G. Free Mobile switched on the first 5G here in December 2020; Orange followed in April 2021, SFR followed in February 2022. The oldest transmitter still listed here goes back to 1999.

ANFR lists a 38 m pylon at Barrière de Péage de Carrières S/ Seine as the tallest structure. The median height of measured supports is 26 m.

3.5 GHz 5G is declared by SFR on all 3 masts, Bouygues Telecom on all 2 masts, Free Mobile on all 2 masts and Orange on 2 of its 4 masts.

1.9 km to the north-east, neighbouring Houilles has 17 masts, more than here.

At 5 km² with 14,791 residents, the commune is dense enough that most antennas sit on rooftops rather than pylons.

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