Non-Compliance
TRI Reporter
Clean Air Act
Clean Water Act
RCRA
ENTEGRIS CHESTER PLANT
Quick Summary
- •Released 234 lbs of toxic chemicals to the environment in the most recent TRI reporting year.
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $202,818 in total penalties since records began.
- •Reports releases of chemicals classified as known or probable carcinogens.
- Address
-
800 W FRONT ST
CHESTER, PA 19013
View on map ↗ - County
- DELAWARE County
- Industry
- Manufacturing
- NAICS (North American Industry Classification)
- 325998
- Inspections
- 10 · last Dec 9, 2025
- Total Penalties
- $202,818 · last Jun 9, 2025
- Registry ID
- 110000336093
How This Compares
#473
of 920 TRI reporters in PA
#9,015
of 16,877 TRI reporters in Manufacturing
Ranked by most recent year's total TRI releases.
Compliance Status (Last 12 Quarters)
Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.
0
Air (CAA)
Qtrs Non-Compliant
Qtrs Non-Compliant
0
Water (CWA)
Qtrs Non-Compliant
Qtrs Non-Compliant
6
Hazardous Waste (RCRA)
Qtrs Non-Compliant
Qtrs Non-Compliant
TRI Toxic Chemical Releases
Annual pounds of each toxic chemical released to air, water, and land, as reported to the EPA Toxic Release Inventory. Carcinogen (♦) and PFAS designations are per EPA and IARC classifications.
Emissions Trend (2015–2024)
+506% overall
| Year | Total Releases (lbs) | vs Prior Year |
|---|---|---|
| 2015 | 528 | — |
| 2016 | 795 | +51% |
| 2017 | 234 | -71% |
| 2018 | 179 | -23% |
| 2019 | 150 | -16% |
| 2020 | 118 | -22% |
| 2021 | 246 | +109% |
| 2022 | 557 | +126% |
| 2023 | 996 | +79% |
| 2024 | 3,198 | +221% |
2024
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Toluene | 1,930 | 1,930 | — | — | 300,773 | |
| Methanol | 813 | 813 | — | — | 186,984 | |
| n-Hexane | 232 | 232 | — | — | 181,040 | |
| Xylene (mixed isomers) | 179 | 179 | — | — | 28,822 | |
| Ethylbenzene | 45 | 45 | — | — | 7,205 | ♦ Carcinogen |
2023
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Xylene (mixed isomers) | 466 | 466 | — | — | 45,068 | |
| Toluene | 211 | 211 | — | — | 445,308 | |
| Methanol | 135 | 135 | — | — | 164,917 | |
| Ethylbenzene | 117 | 117 | — | — | 11,266 | ♦ Carcinogen |
| n-Hexane | 67 | 67 | — | — | 58,283 |
2022
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Toluene | 230 | 230 | — | — | 85,233 | |
| Methanol | 188 | 188 | — | — | 130,696 | |
| n-Hexane | 129 | 129 | — | — | 39,624 | |
| Xylene (mixed isomers) | 8 | 8 | — | — | 36,315 | |
| N,N-Dimethylformamide | 2 | 2 | — | — | 16,884 | ♦ Carcinogen |
2021
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| n-Hexane | 92 | 92 | — | — | 36,066 | |
| Methanol | 91 | 91 | — | — | 179,773 | |
| Toluene | 59 | 59 | — | — | 307,062 | |
| Xylene (mixed isomers) | 2 | 2 | — | — | 35,042 | |
| N,N-Dimethylformamide | 2 | 2 | — | — | 34,258 | ♦ Carcinogen |
2020
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| n-Hexane | 49 | 49 | — | — | 42,378 | |
| Toluene | 34 | 34 | — | — | 451,485 | |
| Methanol | 34 | 34 | — | — | 212,886 | |
| Xylene (mixed isomers) | 1 | 1 | — | — | 61,021 |
2019
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Methanol | 63 | 63 | — | — | 275,238 | |
| n-Hexane | 47 | 47 | — | — | 24,641 | |
| Toluene | 38 | 38 | — | — | 351,586 | |
| N,N-Dimethylformamide | 2 | 2 | — | — | 58,044 | ♦ Carcinogen |
| Xylene (mixed isomers) | 1 | 1 | — | — | 49,900 |
2018
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Methanol | 66 | 66 | — | — | 264,497 | |
| Toluene | 65 | 65 | — | — | 509,820 | |
| n-Hexane | 48 | 48 | — | — | 50,454 | |
| Xylene (mixed isomers) | 1 | 1 | — | — | 44,177 | |
| N,N-Dimethylformamide | 1 | 1 | — | — | 18,106 | ♦ Carcinogen |
2017
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Methanol | 94 | 94 | — | — | 240,229 | |
| n-Hexane | 87 | 87 | — | — | 25,327 | |
| Toluene | 46 | 46 | — | — | 289,820 | |
| N,N-Dimethylformamide | 5 | 5 | — | — | 82,114 | ♦ Carcinogen |
| Xylene (mixed isomers) | 1 | 1 | — | — | 19,912 | |
| n-Butyl alcohol | 1 | 1 | — | — | 7,112 |
2016
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Methanol | 255 | 255 | — | — | 187,731 | |
| Toluene | 255 | 255 | — | — | 216,803 | |
| n-Hexane | 255 | 255 | — | — | 12,792 | |
| N,N-Dimethylformamide | 10 | 10 | — | — | 37,339 | ♦ Carcinogen |
| Xylene (mixed isomers) | 10 | 10 | — | — | 14,924 | |
| n-Butyl alcohol | 10 | 10 | — | — | 7,167 |
2015
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Xylene (mixed isomers) | 187 | 187 | — | — | 15,026 | |
| Methanol | 141 | 141 | — | — | 119,514 | |
| N,N-Dimethylformamide | 129 | 129 | — | — | 14,646 | ♦ Carcinogen |
| Toluene | 68 | 68 | — | — | 159,568 | |
| n-Hexane | 3 | 3 | — | — | 20,752 |
Waste Management & Recycling
How this facility manages toxic chemicals beyond direct releases — through recycling, energy recovery, and on-site or off-site treatment. Data from the most recent TRI reporting year. Quantities in pounds.
| Chemical | Released | Recycled | Energy Recovery | Treated |
|---|---|---|---|---|
| Xylene (mixed isomers) | — | — | 28,814 | 8 |
| n-Hexane | — | — | 39,475 | 141,565 |
| Methanol | — | — | 180,970 | 6,014 |
| Toluene | — | — | 63,160 | 237,613 |
| Ethylbenzene | — | — | 7,203 | 2 |
Off-Site Transfer Destinations
Facilities to which toxic chemicals were transferred for disposal, recycling, energy recovery, or treatment during the most recent TRI reporting year. Quantities in pounds.
| Destination | Chemical | Disposal | Recycling | Energy Rec. | Treatment |
|---|---|---|---|---|---|
|
ACV ENVIRONMENTAL SERVICES INC.
RAHWAY, NJ
|
Ethylbenzene | — | — | 1,579 | — |
|
CLEAN HARBORS EL DORADO, LLC
EL DORADO, AR
|
Ethylbenzene | — | — | — | 2 |
|
SAFETY-KLEEN SYSTEMS, INC.
SMITHFIELD, KY
|
Ethylbenzene | — | — | 5,624 | — |
|
ACV ENVIRONMENTAL SERVICES INC.
RAHWAY, NJ
|
Toluene | — | — | 63,160 | — |
|
CLEAN HARBORS EL DORADO, LLC
EL DORADO, AR
|
Toluene | — | — | — | 12,413 |
|
CLEAN HARBORS OF BALTIMORE INC.
BALTIMORE, MD
|
Toluene | — | — | — | 216 |
|
SAFETY-KLEEN SYSTEMS, INC.
SMITHFIELD, KY
|
Toluene | — | — | — | 224,984 |
|
ACV ENVIRONMENTAL SERVICES INC.
RAHWAY, NJ
|
Xylene (mixed isomers) | — | — | 6,316 | — |
|
CLEAN HARBORS EL DORADO, LLC
EL DORADO, AR
|
Xylene (mixed isomers) | — | — | — | 8 |
|
SAFETY-KLEEN SYSTEMS, INC.
SMITHFIELD, KY
|
Xylene (mixed isomers) | — | — | 22,498 | — |
|
ACV ENVIRONMENTAL SERVICES INC.
RAHWAY, NJ
|
n-Hexane | — | — | 39,475 | — |
|
CLEAN HARBORS EL DORADO, LLC
EL DORADO, AR
|
n-Hexane | — | — | — | 680 |
|
CLEAN HARBORS OF BALTIMORE INC.
BALTIMORE, MD
|
n-Hexane | — | — | — | 216 |
|
SAFETY-KLEEN SYSTEMS, INC.
SMITHFIELD, KY
|
n-Hexane | — | — | — | 140,669 |
|
CLEAN HARBORS EL DORADO, LLC
EL DORADO, AR
|
Methanol | — | — | — | 68 |
|
PETROLEUM RECYCLING CORP
PHILADELPHIA, PA
|
Methanol | — | — | — | 5,730 |
|
SAFETY-KLEEN SYSTEMS, INC.
SMITHFIELD, KY
|
Methanol | — | — | 141,495 | — |
|
CLEAN HARBORS OF BALTIMORE INC.
BALTIMORE, MD
|
Methanol | — | — | — | 216 |
|
ACV ENVIRONMENTAL SERVICES INC.
RAHWAY, NJ
|
Methanol | — | — | 39,475 | — |
Compliance Violations
Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.
| Program | Type | Violation Date | Return to Compliance | Status |
|---|---|---|---|---|
| caa | — | — | — | Open |
| rcra | Standards Applicable to Generators of HW: General | Aug 21, 2024 | Sep 6, 2024 | Resolved |
| caa | FRV | Jan 31, 2023 | — | Open |
| rcra | Standards Applicable to Generators of HW: Manifest Requirements Applicable to Small and Large Quantity Generators | Feb 28, 2020 | Mar 3, 2020 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Feb 28, 2020 | Mar 3, 2020 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Feb 28, 2020 | Mar 3, 2020 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: Use and Management of Containers | Feb 4, 2020 | Dec 7, 2020 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Feb 4, 2020 | Dec 7, 2020 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Feb 4, 2020 | Dec 7, 2020 | Resolved |
| rcra | Standards for Universal Waste Management: Standards for Small Quantity Handlers | Feb 4, 2020 | Dec 7, 2020 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: Tank Systems | Feb 4, 2020 | Dec 7, 2020 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: Air Emission Standards for Equipment Leaks | Feb 4, 2020 | Dec 7, 2020 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: General Facility Standards | Feb 4, 2020 | Dec 7, 2020 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: Contingency Plan and Emergency Procedures | Feb 4, 2020 | Dec 7, 2020 | Resolved |
| caa | FRV | Sep 20, 2016 | — | Open |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: Contingency Plan and Emergency Procedures | Jul 30, 2013 | Oct 23, 2014 | Resolved |
| rcra | Standards Applicable to Recordkeeping and Reporting Applicable to Small and Large Quantity Generators | Jul 30, 2013 | Aug 9, 2013 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: General Facility Standards | Jul 30, 2013 | Oct 23, 2014 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Jul 30, 2013 | Oct 23, 2014 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Jul 30, 2013 | Oct 23, 2014 | Resolved |
| rcra | State Statutory or Regulatory requirements that are broader-in-scope than the federal RCRA requirements | Apr 5, 2012 | May 17, 2012 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Apr 5, 2012 | May 17, 2012 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: Use and Management of Containers | Apr 5, 2012 | May 17, 2012 | Resolved |
| rcra | Standards Applicable to Recordkeeping and Reporting Applicable to Small and Large Quantity Generators | Apr 5, 2012 | May 17, 2012 | Resolved |
| rcra | State Statutory or Regulatory requirements that are broader-in-scope than the federal RCRA requirements | Dec 10, 2009 | Jan 14, 2010 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: Use and Management of Containers | Dec 10, 2009 | Jan 14, 2010 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: Use and Management of Containers | Sep 29, 2009 | Dec 10, 2009 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Sep 29, 2009 | Dec 10, 2009 | Resolved |
| rcra | Standards for Owners and Operators of HW TSDs: Use and Management of Containers | Sep 29, 2009 | Dec 10, 2009 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Sep 29, 2009 | Dec 10, 2009 | Resolved |
| rcra | State Statutory or Regulatory requirements that are broader-in-scope than the federal RCRA requirements | Sep 29, 2009 | Dec 10, 2009 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Jul 11, 2008 | Jul 11, 2008 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Aug 10, 2007 | Aug 10, 2007 | Resolved |
| rcra | State Statutory or Regulatory requirements that are broader-in-scope than the federal RCRA requirements | Mar 21, 2007 | Aug 10, 2007 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: Use and Management of Containers | Mar 21, 2007 | Mar 21, 2007 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Mar 21, 2007 | Mar 21, 2007 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Oct 12, 2006 | Oct 17, 2006 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: General Facility Standards | Oct 12, 2006 | Mar 21, 2007 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: Use and Management of Containers | Oct 12, 2006 | Mar 21, 2007 | Resolved |
| rcra | State Statutory or Regulatory requirements that are broader-in-scope than the federal RCRA requirements | Oct 12, 2006 | Aug 10, 2007 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Jun 29, 2005 | Jun 29, 2005 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | May 19, 2004 | Aug 3, 2004 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | May 19, 2004 | Aug 3, 2004 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Mar 29, 1999 | Jun 23, 1999 | Resolved |
| rcra | Standards Applicable to Recordkeeping and Reporting Applicable to Small and Large Quantity Generators | Nov 3, 1998 | Jun 23, 1999 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Nov 3, 1998 | Jun 23, 1999 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Oct 21, 1994 | Jan 26, 1995 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Feb 4, 1994 | May 23, 1994 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Feb 4, 1994 | May 23, 1994 | Resolved |
Enforcement Actions
Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.
Administrative - Formal
· Case 03-2025-0078 · Jun 9, 2025
$55,421
Administrative - Formal
Clean Air Act
· Case 3604428003 · Jun 9, 2025
$55,421
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-PAD982363889-001 · Mar 22, 2024
$45,988
Administrative - Formal
· Case 03-2024-0014 · Mar 22, 2024
$45,988
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-PAD982363889-101 · Feb 28, 2020
Administrative - Formal
· Case 03-2015-0014 · Oct 23, 2014
$34,000
CONSENT ASSESSMENT OF CIVIL PENALTY
RCRA (Hazardous Waste)
· Case RCRA-PAD982363889-100 · Oct 13, 2010
$15,000
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-PAD982363889-000 · Feb 15, 1994
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