About Us

South Jersey Water Test, LLC is an independent, highly specialized laboratory focused on the sampling and analysis of drinking water. The laboratory was formed specifically to provide services to people wanting their drinking water tested, such as homeowners, landlords, realtors, home inspectors, well drillers, consultants, business owners, and builders.

The goal of SJWT is to provide friendly, professional, reasonably priced, and high quality sampling and testing services.

The laboratory is centrally located to serve all South Jersey counties.

All of SJWT’s sampling technicians are specially trained and equipped to properly collect potable well samples.

The technicians perform on-site, certified pH testing ("analyze immediately" parameter) as well as obtain Global Positioning System (GPS) coordinates for Private Well Testing Act (PWTA) requirements.

A complete Chain of Custody document is initiated to track sample movement.

The laboratory receives the samples and NJDEP certified methods are performed to insure high quality and acceptance by the regulatory authorities.

Final reports are prepared and sent via fax and/or US mail in addition to electronic data reporting for PWTA sample results.

The purpose of SJWT is to test the water of homes and buildings that use a private well for drinking water.

The business is designed to be independent and customer driven while offering fast, accurate, and NJDEP certified laboratory analysis. The laboratory offers a high level of technical services and provides exceptional personal attention.

To learn more, call
toll free: 856-875-3506.

Mark J. Riether - Owner and Lab Director

Mark J. Riether
Owner & Lab Director


The laboratory Owner and Lab Director, Mark J. Riether, was born and raised in Southern New Jersey. He has a Bachelor of Science degree and over fifteen years of environmental laboratory experience. His breadth of experience and knowledge is deeply routed in New Jersey’s regulatory programs as well as the most sophisticated EPA and Dept. of Defense programs.