Dye Testing & Dye Flooding

 

Dye testing is an effective means to identify potential sources of inflow in our municipal sewer systems. These illicit sources can include roof drains, driveway drains, yard drains and sump pumps that may be connected to sewer lines. EST performs dye testing by introducing non-toxic dye into these potential inflow sources and then tracing the path of the dye to confirm or disprove connectivity with the sanitary sewer. Dye testing is typically performed after suspected inflow sources are identified during building inspections.

Dye flooding, typically performed in conjunction with CCTV inspections, is one of the most reliable means to locate both direct and indirect cross connections. During the dye flooding process, EST performs CCTV inspections of the sanitary sewer to inspect and document specific locations where the dyed water is observed to be flowing into the sanitary sewers. Flow measurements are collected to quantify flows. EST also inspects manholes located near the flooded storm sewer are also inspected for defects including leaking frame seals and wall joints. Dye flooding is typically performed after identifying problem areas during smoke testing.

Contact us today to request a quotation or learn more about EST’s dye testing & flooding capabilities.

From Our Customers

Water Compliance Program Manager

Water Compliance Program Manager

Sr. Environmental Safety Officer – Higher Education


I have been relying on EST since I started in the environmental industry in 2006. From the top down, across all divisions of the company, I have always received professional, prompt, and courteous services.

Robert W. Good, PG, LSRP

Robert W. Good, PG, LSRP

Senior Environmental Scientist- BL Companies


I have been using EST for ground water sampling in New Jersey for several years. I have found them to be very responsive to requests for quotes, scheduling and other information, and their pricing is competitive with other sampling service providers. The quality of service and coordination with laboratories is very good. I am notified promptly when field conditions vary from the anticipated and/or requested scope of services. I highly recommend their services.

Marjorie Merisier

Marjorie Merisier

Environmental Compliance Officer


EST has provided me with neutralization system maintenance and sampling/analyses assistance. I would absolutely recommend them as they provide invaluable expertise and consistent high-level customer service.

Wayne E. Bates, PhD, P.E.

Wayne E. Bates, PhD, P.E.

Principal Engineer – Tighe & Bond


I’ve been working with EST for over ten years on various industrial wastewater projects.  They are highly responsive, affordable, and easy to work with, especially from a sample collection standpoint.  They respect the relationship between the engineer and the client and they consistently provide reliable support and information.

Paul Richard

Paul Richard

Senior Program Director, WOOD PLC


For over twenty years, EST has assisted me with various wastewater and stormwater compliance projects. As an extremely busy project manager, I have high standards and expectations for anyone I’m working with, especially when I’m entrusting them with clients I’m responsible for managing. With EST however, I never have to worry as they are always professional, quick to respond, and they take my client’s compliance needs very seriously. I highly recommend their services.

Chad Kershaw

Chad Kershaw

Project Manager, CDM Smith


When it comes to sewer pipeline services for municipalities, we always reach out to EST. They provide competitive pricing while meeting our often demanding schedule. More importantly, EST completes quality work and quickly gains the trust of our clients. I would recommend them to anyone who needs sewer pipeline investigation work completed.

Arthur J. Cunningham PE

Arthur J. Cunningham PE

LSP Director of Engineering – Capaccio Environmental Engineering, Inc.


One of our most important clients needed wastewater sampling performed and each location had its own unique challenges. We knew EST was resourceful, flexible, had a deep bench, and a can-do attitude so we thought of them to help. The entire EST team made this project a great success for us and our client. We would not hesitate to recommend EST for these and other services as we, and our clients, have had very positive experiences working with them.

New England Office

51 Fremont Street Needham, MA 02494

Mid-Atlantic Office

127-G Gaither Drive Mount Laurel, NJ 08054