This site allows residents of the greater Main Line area to access the precise boundaries of the eruv, check the eruv status on a weekly basis, learn the history of the eruv, and even report any possible problems you may have noticed during the week.
The Lower Merion Eruv has recently connected with the Main Line Eruv in several locations, allowing for access from Lower Merion to the Overbrook/Wynnewood communities, and allowing for access to the Lankenau Hospital on Shabbat. For details, select the Eruv Maps tab above.
For those without internet access on Friday afternoon, the Eruv Hotline number is (610) 664-5626 option 3.