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Pollution Prevention and Waste Management
Each year, the Toxics Release Inventory (TRI) collects information from more than 21,000
facilities on the quantities of TRI-listed chemicals they recycle, combust for energy recovery,
treat for destruction, and dispose of or otherwise release both on and off site as part of their
normal operations. These quantities, in total, are collectively referred to as the quantity of
production-related waste managed.
Looking at production-related waste managed over
time helps track progress made by industrial
facilities in reducing the amount of chemical waste
generated and in adopting waste management
practices that are preferable to disposing of or
otherwise releasing waste into the environment.
EPA encourages facilities to first eliminate the
creation of chemical waste through source reduction
activities. For wastes that are generated, the most
preferred management method is recycling,
followed by combusting for energy recovery, treatment, and, as a last resort, disposing of or
otherwise releasing the chemical waste into the environment in an environmentally safe
manner. This order of preference is established in the Pollution Prevention Act fPPAl of 1990
and illustrated by the waste management hierarchy graphic above. One goal of the PPA is that
over time facilities will shift from disposal or other releases toward the more preferred
techniques in the waste management hierarchy that do not result in releases to the
environment.
As with any dataset, there are several factors to consider when using the TRI data. Key factors
associated with data used in the National Analysis are summarized in the Introduction. For more
information see Factors to Consider When Using Toxics Release Inventory Data.
Also note that the list of TRI chemicals has changed over the years. For comparability, trend
graphs include only those chemicals that were reportable for all years presented. Figures that
focus only on the year 2018 include all chemicals reportable for 2018, therefore, values for a
2018-only analysis may differ slightly from results for 2018 in a trend analysis.
Waste Management Hierarchy
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Source Reduction Activities Reported
Facilities are required to report to TRI new source reduction activities that they initiated or fully
implemented during the year. Source reduction includes activities that eliminate or reduce the
generation of chemical waste. Other waste management practices, such as recycling and
treatment, refer to how chemical waste is managed after it is generated and are not considered
source reduction activities. The source reduction information the TRI Program collects can help
facilities learn from each other's best practices and potentially reduce their own chemical
releases.
For more information, see the TRI Source Reduction Reporting Fact Sheet.
Source Reduction Activities Reported
Good Operating Practices
Process Modifications
¦	Spill and Leak Prevention
¦	Inventory Control
Raw Material Modifications
¦	Product Modifications
¦	Cleaning and Degreasing
¦	Surface Preparation and
Finishing
Note: Facilities report their source reduction activities by selecting codes that describe their activities. These codes fall into
one of eight categories listed in the graph legend and are defined in the TRI Reporting Forms and Instructions.
•	In 2018, a total of 3,120 new source reduction activities were implemented by 1,270
facilities (6% of all facilities that reported to TRI).
•	Facilities select from 49 types of source reduction activities that fall under the 8
categories shown in the graph. The most commonly reported source reduction category
is Good Operating Practices.
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o For example, a printed circuit board manufacturing facility reported periodic
maintenance of equipment that helps minimize overdosing ammonia into the
process. fClick to view facility details in the Pollution Prevention rP21 tooll
Additional Resources
•	See the TRI P2 Data Overview Factsheet for more information on source reduction
reporting in recent years.
•	Note that facilities may have implemented source reduction activities in earlier years
which are ongoing or completed projects. To see details of source reduction activities
implemented for this year or in previous years, use the TRI Pollution Prevention fP21
Search Tool.
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Green Chemistry Activities
Green chemistry is a discipline within the field of chemistry which seeks to prevent formation of
pollution through the design and implementation of manufacturing syntheses that use safer
reagents (e.g., green solvents) or feedstocks, use minimal energy, and produce the desired
product in high yield without forming unwanted byproducts or wastes. In the pollution
prevention hierarchy green chemistry is a means to achieve source reduction. Advancements in
green chemistry allow industry to reduce or even prevent pollution at its source by, for
example, designing manufacturing processes that use or produce fewer quantities of TRI
chemicals, or no TRI chemicals at all.
Six of the source reduction codes are specific to green chemistry activities, although green
chemistry practices may also fit under other codes. This figure shows the chemicals for which
the highest number of green chemistry activities, based on the six green chemistry codes, were
implemented over the last five years and the sectors that reported those activities.
Green Chemistry Activities for Top Chemicals, by Industry, 2014-2018
Methanol
Lead and Lead Compounds
Toluene
Nickel and Nickel Compounds
Ammonia
Chromium and Chromium Compounds
20	40	60	80	100
Number of Green Chemistry Activities Reported
120
Chemical Manufacturing
I Transportation Equipment
I Primary Metals
I Fabricated Metals
Computers and Electronic Products
All others
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•	Since 2014, facilities have reported 1,496 green chemistry activities for 130 TRI
chemicals and chemical categories.
•	Green chemistry activities were reported most frequently for methanol, lead and lead
compounds, toluene, nickel and nickel compounds, ammonia, and chromium and
chromium compounds.
•	The chemical manufacturing, fabricated metals, and transportation equipment
sectors reported the highest number of green chemistry activities.
•	Chemical manufacturers used green chemistry to reduce or eliminate their use of TRI
solvent and reagent chemicals, such as methanol, toluene, and ammonia. For example:
o Based on an employee recommendation, a paint and coating manufacturing
facility reformulated a number of products to reduce its toluene usage. fClick
to view facility details in the Pollution Prevention rP21 Tooll
•	Fabricated metal producers applied green chemistry techniques to reduce their usage of
metals including lead, nickel, and chromium. For example:
o A metal forming and laser cutting facility used enhanced process monitoring
and quality control to improve its resource utilization and reduce the scrap
metal (containing nickell generated. fClick to view facility details in the P2
Tooll
•	Transportation equipment manufacturers used green chemistry to reduce or eliminate
their usage of chromium, nickel, and lead. For example:
o A motor vehicle electronics manufacturer replaced leaded product lines with
non-leaded lines, reducing its amount of lead waste managed. fClick to view
facility details in the P2 Tooll
Additional Resources
Source reduction activities such as green chemistry are the preferred way to reduce formation
of chemical wastes. Find more information on green chemistry using these resources:
•	EPA's TRI Pollution Prevention fP21 Olik Dashboard to find green chemistry examples for
a specific chemical and/or industry.
•	EPA's Green Chemistry program for information about green chemistry and EPA's efforts
to facilitate its adoption.
•	EPA's Safer Choice program for information about consumer products with lower hazard.
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For more details on the types of green chemistry activities reported to TRI and trends in
green chemistry reporting, see The Utility of the Toxics Release Inventory CTRI) in
Tracking Implementation and Environmental Impact of Industrial Green Chemistry
Practices in the United States. I™!
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Reported Barriers to Source Reduction
Facilities that did not implement new source reduction activities for a TRI chemical have the
option to disclose any barriers that prevented them from implementing source reduction. Since
2014, TRI reporting forms include barrier codes, which enable reporting and analysis of
obstacles that facilities may be experiencing. This figure shows the types of barriers that
facilities reported for metals and for all other (non-metal) TRI chemicals.
Barriers to Source Reduction Reported for Metals and All
Other Chemicals, 2014 - 2018
(O
-Q
T3
CD
+j
k_
O
Q.
CD
£
CD
U
&_
CD
Q.
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
Metals
I Source reduction unsuccessful
Regulatory barriers
I Insufficient capital
I Further source reduction not feasible
I No known substitutes
Non-metals
I Technical information needed
I Reduction not technically feasible
I Product quality concerns
I Other barriers
Note: Facilities report barriers to source reduction by selecting from nine codes that describe possible barriers. These codes are
defined in the TRI Reporting Forms and Instructions.
From 2014 to 2018:
• Facilities reported barriers to source reduction for 333 chemicals and chemical
categories. Analyzing the source reduction barriers reported to TRI helps identify where
more research is needed, for example, to address technological challenges or promote
development of viable alternatives. It may also allow for better communication between
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those that have knowledge of source reduction practices and those that are seeking
additional help.
•	The most frequently reported barriers for both metals and non-metals were no known
substitutes or alternative technologies and further source reduction not feasible. This
excludes other barriers, a catch-all category available to facilities.
•	While no known substitutes was the most frequently reported barrier for both metals
and non-metals, it accounted for almost half (47%) of the barriers reported for metals
but made up a smaller portion (37%) of barriers reported for non-metals.
•	For the no known substitutes barrier for metals, many facilities reported the presence of
the TRI metal in their raw materials (e.g., metal alloys) as the reason they did not
implement source reduction activities. Examples include:
o A sign manufacturer reported that the prime aluminum and magnesium they use
in production contains trace amounts of lead as an undesirable impurity. fClick to
view facility details in the Pollution Prevention rP21 Tooll
o An iron and steel mill noted that manganese is used in steel production to
comply with American Society for Testing and Materials (ASTM) standards, so
they are unable to reduce their use of this chemical. fClick to view facility details
in the P2 Tooll
•	Further source reduction not feasible was another commonly reported barrier, especially
for non-metals. Facilities select this barrier code when additional reductions do not
appear feasible. For example:
o A plastic product manufacturing facility implemented a recirculation system for
bulk storage and an accurate metering system related to its stvrene usage.
Further reductions could be realized with the implementation of a robotic
application process, but the facility reported insufficient capital to install such
equipment. fClick to view facility details in the P2 Tooll
•	You can view barriers reported for any TRI chemical bv using the TRI P2 Search Tool.
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Source Reduction Activities by Chemical
For the chemicals with the highest source reduction reporting rates over the last 5 years, this
figure shows the number and types of activities implemented.
Newly Implemented Source Reduction Activities by Chemical, 2014-2018
Good Operating Practices
I Spill and Leak Prevention
I Inventory Control
I Surface Preparation and Finishing
Process Modifications
Raw Material Modifications
I Product Modifications
I Cleaning and Degreasing
1,000
900
800
700
600
500
400
300
200
100
Styrene
Antimony and Antimony
Compounds
Dichloromethane
Trichloroethylene
Di(2-ethylhexyl)phthalate
Note: 1) Limited to chemicals with at least 100 reports of source reduction activities from 2014-2018. 2) Facilities report their
source reduction activities by selecting codes that describe their activities. These codes fall into one of eight categories listed in the
graph and are defined in the TRI Reporting Forms and Instructions.
From 2014 to 2018:
•	TRI facilities reported 28,951 source reduction activities for 267 chemicals and chemical
categories.
•	Chemicals with the highest source reduction reporting rates were: stvrene. antimony
and antimony compounds, dichloromethane (DCM, also known as methylene chloride),
trichloroethylene. and dit^-ethvlhexvnphthalate.
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•	The type of source reduction activity implemented for these chemicals varied depending
on their use in industrial operations and the chemical's characteristics. For example:
o Raw material modifications is commonly reported as a source reduction
activity to reduce waste of di(2-ethylhexyl)phthalate (DEHP), a plasticizer;
styrene, a chemical used to make plastics such as polystyrene; and antimony
compounds which are used in electronics, batteries, and as a component of fire
retardants.
o Cleaning and degreasing, including changing to aqueous cleaners, is
implemented for industrial solvents such as trichloroethylene (TCE).
o Process modifications, including optimizing reaction conditions and modifying
equipment, layout, or piping, can help reduce the amount of solvents such as
dichloromethane (DCM) needed for a process.
Facilities may also report additional details to TRI about their source reduction, recycling, or
pollution control activities in an optional text field of the TRI reporting form.
Examples of optional source reduction information for 2018:
•	Stvrene: A boat manufacturer optimized the efficient use of styrene by adding
equipment to conduct some molding operations under closed conditions. I"Click to view
facility details in the Pollution Prevention rP21 Tooll
•	Dichloromethane: A paint and coating manufacturer was able to reduce its releases of
dichloromethane by implementing product reformulation identified through participative
team management. I"Click to view facility details in the P2 Tooll
•	Trichloroethylene: A metal stamping facility purchased and installed a new vacuum
vapor degreaser to reduce its trichloroethylene releases. fClick to view facility details in
the P2 Tooll
•	Dir2-ethvlhexvnphthalate: A resin compounding facility substituted DEHP with other
plasticizer(s). fClick to view facility details in the P2 Tooll
•	Antimony Compounds: An automobile parts manufacturer is moving away from PVC
materials which use antimony trioxide as a fire retardant to thermoplastic polyolefin
(TPO)-type materials to meet customer demands. The facility continues to test
alternative fire retardants to use in its products. fClick to view facility details in the P2
Tooll
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You can compare facilities^ waste management methods and trends for any TRI chemical bv
using the TRI P2 Search Tool.
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Source Reduction Activities by industry
For the industries with the highest source reduction reporting rates over the last 5 years, this
figure shows the number and types of activities these sectors implemented.
Newly Implemented Source Reduction Activities by Industry, 2014-2018
Good Operating Practices
I Spill and Leak Prevention
I Inventory Control
I Surface Preparation and Finishing
Process Modifications
Raw Material Modifications
I Product Modifications
I Cleaning and Degreasing
2,000
1,600 	
Plastics and Rubber
Computers and
Electronic Products
Miscellaneous
Manufacturing
Textiles
Printing
Note: Facilities report their source reduction activities by selecting codes that describe their activities. These codes fall into one of eight categories
listed in the graph legend and are defined in the TRI Reporting Forms and Instructions.
From 2014 to 2018:
•	The five industry sectors with the highest source reduction reporting rates were plastics
and rubber, computers and electronic products, miscellaneous manufacturing (e.g.,
medical equipment), textiles, and printing.
•	For most sectors, "Good operating practices" was the most frequently reported type of
source reduction activity. Other commonly reported source reduction activities varied by
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sector. For example, computers and electronic products manufacturers frequently
reported modifications to their raw materials and products, often associated with the
elimination of lead-based solder.
•	Facilities may also report additional details to TRI about their source reduction or waste
management activities, as shown in the following examples.
Examples of optional source reduction information for 2018:
•	Plastics and Rubber: A plastics and resin manufacturing facility reformulated its liquid
polyester resin to a zero-styrene alternative resin, and reformulated its sheet molding
compounds resin to use raw materials with lower quantities of styrene. fClick to view
facility details in the P2 Tool!
•	Computers and Electronic Products: A printed circuit board manufacturing facility
began offering alternative product finishes to customers in order to offset the use of
lead finish in its product. The facility also changed product specifications to minimize
the amount of rework required in production, further reducing unnecessary use of lead
for metal coating. fClick to view facility details in the P2 Tool!
•	Miscellaneous Manufacturing: A surgical and medical instrument manufacturing
facility purchased raw materials shaped more similarly to final products to reduce its
chromium-containing stainless steel scrap. fClick to view facility details in the P2 Tool!
•	Printing: A gravure printer reduced toluene use through paint scrap tracking and paint
reuse programs. fClick to view facility details in the P2 Tool!
•	Textiles: A carpet and rug mill implemented raw material modifications and reduced its
cobalt and copper compounds releases by using a different type of yarn. fClick to view
facility details in the P2 Tool!
You can view all reported pollution prevention activities and compare facilities' waste
management methods and trends for any TRI chemical bv using the TRI P2 Search Tool.
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Waste Management Trends
Facilities report to TRI the quantities of TRI-listed chemicals that they dispose of or otherwise
release to the environment as a result of normal industrial operations. In addition, facilities
report the quantities of these chemicals that they manage through preferred methods including
recycling, combusting for energy recovery, and treating for destruction. This figure shows the
trend in these quantities, collectively referred to as production-related waste managed.
Production-Related Waste Managed, 2007-2018
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Year
Disposal or Other Releases	Treatment
Energy Recovery	Recycling
0 Facilities
Note: For comparability, trend graphs include only those chemicals that were reportable to TRI for all years presented.
From 2007 to 2018:
•	Production-related waste managed decreased during the recession. Since 2009,
production-related waste managed has generally been increasing as the U.S. economy
has improved.
•	Since 2007, production-related waste managed increased by 6.8 billion pounds (28%).
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o Disposal and other releases decreased by 466 million pounds (-11%).
o Treatment decreased by 707 million pounds (-9%).
o Energy recovery increased by 194 million pounds (7%).
o Recycling increased by 7.8 billion pounds (86%), a trend largely driven by two
plastics manufacturing facilities reporting billions of pounds of dichloromethane
recycled and one petrochemical manufacturing facility reporting over 3.4 billion
pounds of cumene recycled each year from 2014-2018.
• The number of facilities that report to TRI has declined by 8% since 2007. Reasons for
this decrease include facility closures, outsourcing of operations to other countries, and
facilities reducing their manufacture, processing, or other use of TRI-listed chemicals
below the reporting thresholds.
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Production-Related Waste Managed by Chemical
This figure shows the chemicals that were managed as waste in the greatest quantities from
2007 to 2018.
Production-Related Waste Managed by Chemical
35,000
30,000
25,000
o 20,000
o 15,000
10,000
5,000
METHANOL
ICUMENE
I DICHLOROMETHANE
HYDROCHLORIC ACID
I LEAD AND LEAD COMPOUNDS
TOLUENE
I ZINC AND ZINC COMPOUNDS
ETHYLENE
I COPPER AND COPPER COMPOUNDS
I All Others
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Year
Note: For comparability, trend graphs include only those chemicals that were reportable to TRI for all years presented.
From 2007 to 2018:
•	Facilities reported production-related waste managed for 546 chemicals and chemical
categories from 2007 to 2018. The nine chemicals for which facilities reported the most
production-related waste managed, shown above, represent 50% of the total
production-related waste reported.
•	The reported quantities of most of the top chemicals contributing to production-related
waste managed have remained relatively constant since 2007.
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•	Of the chemicals shown above, facilities reported increased quantities of waste managed
for: dichloromethane. lead and lead compounds, cumene. and ethylene.
o Production-related waste of lead and lead compounds increased by 21%.
o Cumene waste managed increased eight-fold, mostly driven by one facility
reporting over 3.4 billion pounds of cumene recycled annually during 2014-2018.
TCIick to view facility details in the Pollution Prevention rP21 Tooll
From 2017 to 2018:
•	Facilities reported decreases in waste management quantities for these chemicals:
o Lead and lead compounds decreased by 117 million pounds (-8%)
o Toluene decreased by 70.0 million pounds (-4%)
o Hydrochloric acid decreased by 42.2 million pounds (-4%)
o Cumene decreased by 37.8 million pounds (-1%)
o Zinc and zinc compounds decreased by 27.4 million pounds (-2%)
•	Dichloromethane waste managed increased by 1.8 billion pounds (112%), mostly driven
by one plastic manufacturing facility reporting 2.0 billion pounds of the chemical
recycled in 2018 and no recycling of dichloromethane in prior years. I"Click to view
facility details in the Pollution Prevention fP21 Tooll
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Production-Related Waste Managed by Industry
This figure shows the industry sectors that managed the most waste from 2007 to 2018.
Production-Related Waste Managed by Industry
I All Others
I Paper Manufacturing
I Primary Metals
Petroleum Products Manufacturing ¦ Food Manufacturing
I Metal Mining	Electric Utilities
Chemical Manufacturing
30,000
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Note: For comparability, trend graphs include only those chemicals that were reportable to TRI for all years presented.
From 2007 to 2018:
•	The percent contribution of each of the top sectors to production-related waste
managed has remained relatively constant since 2007.
•	Of the sectors shown in the graph, four increased their quantity of waste managed:
o	Chemical manufacturing increased by 7 billion pounds (71%)
o	Metal mining increased by 601 million pounds (47%)
o	Food manufacturing increased by 553 million pounds (55%)
o	Petroleum products manufacturing increased by 203 million pounds (17%)
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•	The quantity of waste generated in some industries fluctuates considerably from year to
year, due to changes in production or other factors. For example, quantities of waste
managed reported by metal mining facilities can change significantly based on
differences in the composition of waste rock.
From 2017 to 2018:
•	Industry sectors with the greatest reported changes in waste management quantities
were:
o Chemical manufacturing increased by 2.5 billion pounds (16%)
o Petroleum products manufacturing increased by 175 million pounds (8%)
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Waste Management by Parent Company
Facilities that report to the Toxics Release Inventory (TRI) provide information on their parent
company. For TRI reporting purposes, the parent company is the highest-level company located
in the United States. This figure shows the parent companies whose facilities reported the most
production-related waste managed for 2018. Facilities outside of the manufacturing sector, such
as electric utilities and coal and metal mines, are not included in this chart because those
sectors' activities do not lend themselves to the same types or degree of source reduction
opportunities as the activities at manufacturing facilities.
Note that almost all of these companies are largely managing their waste through EPA's
preferred waste management methods-recycling, energy recovery, or treatment-rather than
releasing it to the environment.
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Production-Related Waste Managed by Parent Company
Sabic US Holdings LP

1 1
2018





2017



Advansix Inc




2018



2017

DowDuPont Inc




2018









2017




Incobrasa Industries Ltd




2018




2017




PBF Energy Inc




2018




2017




Koch Industries Inc




2018









2017
	
IHHI



Bridgestone Americas Inc




2018




2017




Syngenta Corp




2018




2017




BASF Corp




2018









2017




Honeywell International Inc




2018




2017




0	12	3	4
Billions of Pounds
¦ Disposal or Other Releases ¦ Treatment ¦ Energy Recovery ¦ Recycling
Notes: 1) This figure uses EPA's standardized parent name. 2) To view facility counts by parent in 2017 or 2018, mouse over the bar graph. 3) One facility, incobrasa
Industries Ltd, does not report a parent company but it is included in this figure because it has a comparable quantity of production-related waste managed. 4) For 2017, ten
facilities submitted subsidiaries or variations of Bridgestone Americas, Inc. as their parent company and for 2018, these facilities were standardized under the Bridgestone
Americas parent company.
These parent companies'TRI-reporting facilities operate in the following industry sectors:
•	Chemical manufacturing: Advansix Inc, DowDuPont Inc, BASF Corp, Syngenta Corp,
Honeywell International Inc, Sabic US Holdings LP
•	Soybean processing: Incobrasa Industries Ltd
•	Multiple sectors, e.g. pulp and paper, petroleum refining, and chemicals: Koch
Industries Inc
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•	Tires and rubber products: Bridgestone Americas Inc
•	Petroleum refining: PBF Energy Inc
Six of these top parent companies reported implementing new source reduction activities in
2018. Some of these companies reported additional (optional) descriptive information to TRI
about their pollution prevention or waste management activities.
Examples of additional pollution prevention-related information for 2018:
•	A DowDuPont plastics and resin manufacturing facility replaced a process tank and
connected the new tank to an air pollution control device to reduce releases of
chemicals including acrvlonitrile. I"Click to view facility details in the Pollution Prevention
TP21 Tool!
•	A wood product manufacturing facility owned by Koch Industries upgraded a wastewater
treatment system to reduce releases of ammonia in wastewater, and diverted a portion
of the previously treated wastewater for energy recovery. I"Click to view facility details in
the P2 Tooll
To conduct a similar type of parent company comparison for a given sector, chemical, or
geographic location, use the TRI P2 Search Tool.
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Source Reduction Activities by Parent Company
This figure shows the parent companies whose facilities implemented the most source reduction
activities during 2018. Facilities outside of the manufacturing sector, such as electric utilities
and coal and metal mines, are not included in this chart because those sectors' activities do not
lend themselves to the same source reduction opportunities as the activities at manufacturing
facilities. For example, metal mining involves moving large volumes of earth from below ground
or from a mining pit to the surface, to get to the target metal ore. This activity, which metal
mines report as a release of TRI chemicals, is inherent in mining operations.
Facilities report their source reduction activities by selecting codes that describe their activities.
These codes fall into one of eight categories listed in the graph legend and are defined in the
TRI Reporting Forms and Instructions.
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Source Reduction Activities for Top Parent Companies
3M Co
2018
2017
Berkshire Hathaway Inc
2018
2017
Shell Oil Co
2018
2017
Axalta Coating Systems LLC
2018
2017
Nucor Corp
2018
2017
Superior Essex Inc
2018
2017
Lyondellbasell Industries
2018
2017
Exxon Mobil Corp
2018
2017
Ergon Inc
2018
2017
CCL Industries Corp
2018
2017
20	40	60	80
Number of Source Reduction Activities Reported
100
120
Good Operating Practices
I Spill and Leak Prevention
I Inventory Control
I Cleaning and Degreasing
Process Modifications
Raw Material Modifications
I Product Modifications
I Surface Preparation and Finishing
Notes: 1) This figure uses EPA's standardized parent company names. 2) The increases by Ergon, Inc are driven by the
acquisition of two facilities whose source reduction activities for 2017 are under their former parent company. 3) For 2017, 13
facilities reported subsidiaries of Shell Oil Company as their parent companies; for 2018 the parent company for these facilities
was standardized to Shell Oil Company. 4) To view facility counts by parent in 2017 or 2018, mouse over the bar graph.
These parent companies' facilities primarily operate in the following industries:
•	Chemical manufacturing: 3M Co, Axalta Coating Systems, Lyondellbasell Industries
•	Multiple sectors: Berkshire Hathaway Inc, Ergon Inc
•	Steel manufacturing: Nucor Corp
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•	Wire and cable manufacturing: Superior Essex Inc
•	Metal containers: CCL Industries Corp
•	Petroleum products manufacturing: Shell Oil Co, Exxon Mobil Corp
Good operating practices, such as improving maintenance scheduling and installation of quality
monitoring systems, are the most commonly reported types of source reduction activities for
these parent companies. Spill and leak prevention and process modifications are also commonly
reported.
Some of these parent companies submitted additional optional text on their TRI reporting forms
describing their pollution prevention or waste management activities.
Examples of additional pollution prevention-related information for 2018:
•	A Nucor facility began using a new primer paint coating containing less certain glycol
ethers to reduce its releases of the chemical. fClick to view facility details in the Pollution
Prevention rP21 Tooll
•	A 3M facility implemented procedures to prevent spilling or leakage of boron trifluoride
by improving maintenance and inspection requirements for its outdoor storage tanks.
fClick to view facility details in the P2 Tooll
You can find P2 activities reported bv a specific parent company and compare facilities' waste
management methods and trends for any TRI chemical bv using the TRI P2 Search Tool.
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