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Facilities

SEMASS

141 Cranberry Highway
West Wareham, MA 02576

Facility Alert

On Thursday April 6, Covanta Plymouth proactively removed a unit from service and reduced processing in the other unit due to some necessary repairs. The reductions were made to avoid the necessity of venting excess steam to atmosphere. Later that evening, when attempting to reconnect to the local utility, all power was lost at the facility. Power was restored at the site approximately 24 hours later. We are currently evaluating plant electrical systems and making necessary repairs prior to the units being restarted. A full investigation of the incident has been completed, click on the link below to see the brief summary of the findings.

Reducing Landfill Waste

Located in West Wareham, Massachusetts, the Southeastern Massachusetts (SEMASS) Resource Recovery Facility is an award-winning Thermomechanical Treatment Facility that serves the nearly 40 participating communities in Cape Cod, Southeastern Massachusetts and the Boston metropolitan area with reliable and sustainable waste management. Every year, our facility processes more than 1,050,000 tons of waste that would otherwise have ended up in landfills.

In addition to keeping waste out of landfills, Reworld™ is committed to ensuring safe operations and minimizing environmental impacts. We have been consistently recognized for exceptional operations and community involvement, including the American Society of Mechanical Engineers (ASME) Materials & Energy Recovery Division (MER) Facility Recognition Award, the Solid Waste Association of North America (SWANA) Silver Excellence Award, and the Environmental Business Council of New England (NE-EBC) John A.S. McGlennon Environmental-Energy Award for Corporate Leadership.

Our Facility’s Annual Impact

  • Methane2-BLUE

    Less waste in landfills reduces greenhouse gas emissions by 755,000 metric tons of CO2. That’s like taking 162,000 passenger vehicles off the road for one year.

  • Energy-BLUE

    We produce 78 megawatts of electricity 24/7 with our Waste-to-Energy process - enough to power 54,000 homes for a year.

  • Metals Recovery-BLUE

    We also recover 38,700 tons of metal for recycling annually - enough to build 28,000 cars.

Environmental Performance

We care about our communities and operate well below emissions limits. Over 99.9 percent of what comes out of our plant’s stack is what you’d typically find in air - water vapor, nitrogen, oxygen, and carbon dioxide. The remaining constituents are well below federal and state standards.

Download the Data Sheet

  1. Permit Limits are derived from USEPA standards for Large Municipal Waste Combustors (40 CFR 60, Subparts A, Cb and Eb) or state specific limits if more stringent.
  2. CO, SO2 and NOx values are the daily (24-hr) block averages for that day.
  3. Opacity values are the maximum 6-minute average for that day.
  4. All emission values reported in units consistent with the permit: CO, SO2 and NOx reported as parts per million, dry gas basis, corrected to 12% CO2 for Units 1&2 (ppmdv12) and 7% O2 for Unit 3 (ppmdv7), Opacity as %, SO2 Removal Efficiency as %.
  5. SO2 compliance is based on concentration (ppm) or removal efficiency (% reduction between inlet and outlet emissions).
  6. The dash symbol (-) indicates that a unit is off-line, has insufficient data for a compliance period or is in an exempted period.

*Results are provided for informational purposes only. Data is posted 24 hours after completion of each day to allow for quality assurance/quality control (QA/QC) review.

Questions? Visit our FAQs page

Join the team at Reworld™ SEMASS

Join our team for a rewarding career partnering with colleagues, customers, and communities to solve one of society’s greatest challenges. At Reworld™, innovation is encouraged and everyone’s ideas are valued.

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