Directions would help.

200 Lake Shore Drive, Haworth NJ 07641 is the actual address

BUT!!!!!!  IF using GPS, this address will NOT work - it will put you at the other end of Lakeshore with a closed road in between getting you hopelessly lost.

Generally you can use Corner of "Lake Shore Drive and Sunset Avenue" and make it but directions would be far safer.

Very simple:

From the Garden State Parkway, follow Oradell Avenue EAST to the end (2-3 miles).

At the end of Oradell Ave (blinking red), go left onto Grant Ave.

Second left is Lake Shore Drive.  It's at a bend in the road where Grant turns into Sunset Ave. You will see the reservoir on your left.  Follow Lake Shore Drive for about 1000 feet.  Treatment plant is on your right.

Park just past the guard booth

John O