Cell towers in Jouars-Pontchartrain (Yvelines)

Supports leave a gap of about 2.5 km to the east of the centre. 2 supports are declared underground, in a gallery or a tunnel. For questions about exposure, see the exposure guide.

Most of the town's 7 masts are pylons (3); 2 underground or tunnel sites and 1 water tower make up the rest of the mix.

Place names on the register include Les Bordes, La Butte Rouge, RN 12 Tunnel de Pontchartrain, 8 Rue des Artisans and RTE D'Elancourt.

2017 was the busiest year, with 11 new systems, most of them 4G. Free Mobile opened 5G here in January 2021; Bouygues Telecom followed in April 2021, Orange followed in January 2022. The oldest transmitter still listed here goes back to 1998.

Approved additions not yet in service are pending on 3 existing masts, for example Free Mobile (4G and 5G) at RN 12 Tunnel de Pontchartrain, Free Mobile (4G and 5G, including 5G at 3.5 GHz) at La Butte Rouge and Orange (5G 2100 MHz) at La Butte Rouge. 5 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

3.5 GHz 5G is declared by Bouygues Telecom on 2 of its 4 masts, Orange on 2 of its 3 masts, SFR on 2 of its 3 masts and Free Mobile on 1 of its 2 masts. 71% of the town's masts carry 5G, fewer than across Yvelines towns with five or more masts (88%).

The tallest structure is a 39 m water tower at Les Bordes. The median height of measured supports is 26 m.

Elancourt lies 4.2 km to the east and has 21 masts, more than here.

Of the 7 masts in the commune, only one mast carries all four networks.

By mast count, Jouars-Pontchartrain is 43rd of the 62 Yvelines towns that have five or more. With 7 masts for 6,039 residents, or 12 per 10,000, it has more masts per inhabitant than the median for those towns (7).

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