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Covanta Plymouth

About the Facility

Covanta Plymouth began commercial operation in February 1992 and serves communities and businesses in Eastern Pennsylvania with sustainable waste disposal. It provides an alternative to landfilling post-recycled waste that reduces greenhouse gases and generates energy. The facility processes approximately 1,216 tons per day of municipal solid waste and generates enough energy to power 25,000 homes. The facility is also a large recycler of metal, annually recovering enough to build more than 4,600 cars.

The Covanta Plymouth facility is equipped with a water-cooled turbine-generator condenser that converts steam to water for continuous cycling of water through the boilers. It also features extensive pollution control systems, including flue gas scrubbers injecting lime, fabric filter baghouses, nitrogen oxide control, mercury control and a continuous emissions monitoring system.

The facility is a recipient of the U.S. Occupational Safety and Health Administration’s (OSHA) Voluntary Protection Program (VPP) Star award. Acceptance into the VPP Star program is official recognition of the outstanding efforts of employers and employees to achieve exemplary occupational safety and health policies, procedures and practice.

Covanta Plymouth Odor Incident Update 

On Sunday, December 15, 2019, Covanta Plymouth was notified of an odor complaint in the vicinity of the facility. After an investigation, it was quickly determined that the Plymouth facility was in fact the source of the odor. Adjustments were made immediately to eliminate the cause of the odor.

In addition, a software modification was deployed to the facility’s computer operating system to help address the issue, which we believe has provided a full remedy to Sunday’s incident. We will continue to review the data and will make any additional adjustments deemed necessary to prevent odors.

In keeping with ongoing efforts to address and allay community concerns with regard to Covanta Plymouth, we have updated the facility’s webpage ( to display continuous emissions monitoring data. Should the public have any questions or need assistance in accessing this data, please call our hotline at 610-569-9372. 

Covanta Plymouth

1155 Conshohocken Road
Conshohocken, PA 19428

Contact Information:

Herman Love


Contact Us

Please contact our dedicated 24-hour hotline at 610-569-9372 with any questions or concerns.

We welcome the opportunity to show you how our resource recovery process works. If you are interested in a tour of the facility, please fill out the adjacent form.

Tour Checklist (PDF)

To search for careers in this area click below:

Downloadable Fact Sheets

Plymouth facility fact sheet

Covanta Plymouth Facts and Figures

Facility Performance Sheet preview

Facility Performance Data

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How the Energy-from-Waste Process Works

Facts about Emissions at Covanta Facilities

Covanta Plymouth Emissions Data

Data Presented in Permit Required Units as Averaged Emissions

(a) CO values are the maximum 4-hr block average for the day.
(b) SO2 and NOx values are the daily (24-hr) block averages for that day.
(c) Opacity values are the maximum 6-minute average for that day.
(d) All emission values reported in units consistent with the permit:
     CO, SO2 and NOx reported as parts per million, dry gas basis at 7% O2 (ppmdv7), Opacity as %, Removal Efficiency as %
(e) SO2 and HCL compliance based on concentration (ppm) or removal efficiency (% reduction between inlet and outlet emissions).
(f) CO emissions during periods of unit startup and shutdown are exempt as per the Title V Operating permit.

* Results are provided for informational purposes only and are subject to adjustment based on allowable quality assurance/quality control (QA/QC) review.