Nyanza Chemical Waste Dump NPL Site

State TrusteeState of Massachusetts
Federal TrusteeDepartment of Commerce
AO Bureau

Also Known As


Incident Type




Case Status



Trolley Brook, Outfall Creek, Sudbury River


Contaminants of Concern Include

Affected DOI Resources Include

Migratory Birds, Anadromous Fish

Case Description

The Nyanza Chemical Waste Dump is a 35-acre site located adjacent to an active industrial complex. Historical industrial operations at the site from 1917 to 1978 released large volumes of wastewater contaminated with acids, organic chemicals and inorganic chemicals. Of particular concern among the released hazardous substances is the chromium and mercury that were used as catalysts in the production of textile dyes. Over 45,000 tons of chemical sludges, together with spent solvents and other chemical wastes, were buried on the site. Some of these wastes were discharged to the Sudbury River. As a result, groundwater, soils, sediments and surface waters are contaminated with heavy metals and chlorinated organic compounds. The U.S. Environmental Protection Agency placed the Nyanza Chemical Waste Dump on the National Priorities List in 1983.

View looking east of remediated and restored eastern wetlands at Nyanza site, Credit: USEPA

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 Document TypeDocument NameDocument Date


 Factsheet Belize Cacao-based Agroforestry Restoration Program Factsheet 01/01/2015
 Factsheet Nyanza Chemical Waste Dump NPL Site NRDAR Factsheet 04/01/2008


 MOA/MOU Nyanza Chemical Waste Dump NPL Site Memorandum of Agreement 05/21/1998


 Restoration Report Belize Cacao-based Agroforestry Restoration Program 2013 Annual Report 03/20/2014
 Restoration Report Belize Cacao-based Agroforestry Restoration Program 2014 Annual Report 02/04/2015
 Restoration Report Belize Cacao-based Agroforestry Restoration Program 2015 Annual Report 02/15/2016
 Restoration Report Belize Cacao-based Agroforestry Restoration Program 2016 Annual Report 02/22/2017
 Restoration Report Belize Cacao-based Agroforestry Restoration Program 2017 Annual Report 03/17/2018
 Restoration Completion Report Greenways Conservation Area Habitat Improvement Project Final Report 01/06/2016
 Restoration Completion Report Migratory Connectivity for Neotropical Migrant Songbirds in the Sudbury River Watershed BRI Final Report 06/15/2015
 Restoration Completion Report Nyanza Natural Resource Damages Funds Final Report 01/01/2017
 Restoration Completion Report Red Maple Trail Final Report 08/21/2017
 Restoration Plan and Environmental Assessment Restoration Plan and Environmental Assessment 05/07/2012
 Restoration Report Sudbury RiverSchools 2013 and 2014 Progress Report 04/02/2015
 Restoration Report Sudbury RiverSchools Final Report 05/11/2017
 Restoration Completion Report Wild Rice Restoration on the Sudbury River Final Performance Report 03/03/2020


 Powerpoint Presentations Nyanza Draft RP/EA Public Meeting PowerPoint Presentation 12/14/2011
 Other Nyanza Restoration Press Release by MassDEP 08/30/2012
 Other Red Maple Trail Celebration News Release 05/01/2017

No publications have been entered for this case.

Map View

Case Contact

New England Ecological Services Field Office

Concord, NH | (603) 223-2541 | http://www.fws.gov/newengland/

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