Welcome! Thank you for visiting our web site. 

Johnston, Inc. is a manufacturers' representative covering 

North Carolina, South Carolina, and Virginia.

We represent ISCO, Plasti-Fab, In-Situ and many other high quality 

manufacturers of water and wastewater monitoring equipment 

and treatment products. Please use the links at left to find out how 

we can help with your application or project.

George M. (Mac) Johnston and his wife Martha founded our company in 1969 as G. M. Johnston & Associates. We strive to continue in their footsteps by providing a dedicated sales staff to our principals and excellent products and support to our customers.

In addition to products shown on the accompanying pages we also offer project planning assistance, on site startup and calibration services and turnkey flow studies. Rental programs are available for many of the products we carry. For rental information please visit www.envirolease.com