EPA TRI Facility · Chemicals
Alnylam Pharmaceuticals
Norton, MA
- Total releases
- 5.3K lbs
- Chemicals reported
- 3
- Carcinogens
- 1
- Primary pathway
- Air Releases
AIR Form-R mix
Alnylam Pharmaceuticals: how the 7.5K lbs splits
7.5K lbs across all reported pathways
- Air Releases 7.5K lbs 100.0%
Alnylam Pharmaceuticals's 7.5K lbs Form-R total is AIR - air releases is 100.0% of the bar. Off-site transfers stay separate from air, water, and land releases. Leading chemical by pounds: Acetonitrile.
Carcinogen-classified pounds vs other reported pounds
Same cumulative TRI total as above, split by EPA/IARC carcinogen classification on each chemical: pounds share, not chemical count. Classification is not a site health-risk score.
LIGHT volume AIR pathway TRACE-CARC
Alnylam Pharmaceuticals is an EPA Toxics Release Inventory reporter in Norton, MA, in the chemicals sector. It reported 2.1K lbs of releases across 2 chemicals in 2024, and 5.3K lbs in total across its 2020-2024 reporting years. That ranks 11,064 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Massachusetts's 373 reporting TRI sites, pounds #1 is not chemical-count #1. Alnylam Pharmaceuticals is pounds #160 and chemical-count #122 at 5.3K lbs. Solutia Inc leads reported pounds (2.5M lbs) at 9 chemicals (chemical-count #10). Astro Chemicals Inc leads chemical count at 17 chemicals (5.9K lbs, pounds #154). Reported volume rose against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Waters Technology Corp; Qg Printing II Corp; Professional Contract Sterilization Inc (pcs); Airborn Electronics Inc. Similar-scale Chemicals peers outside Massachusetts: Kedrion Biopharma; Sherwin-Williams Co; Safc Inc.; Porcelen Ltd Ct LLC. Largest disclosed chemicals by pounds: Acetonitrile; Toluene; Pyridine.
Compare Alnylam Pharmaceuticals with
Nearest reporters in Massachusetts
- Waters Technology Corp Taunton · 66.6K lbs
- Qg Printing II Corp Taunton · 6.4K lbs
- Professional Contract Sterilization Inc (pcs) Taunton · 282 lbs
- Airborn Electronics Inc Taunton · 3 lbs
Similar-scale Chemicals sites elsewhere: Kedrion Biopharma (NY) · Sherwin-Williams Co (IL) · Safc Inc. (WI)
Alnylam Pharmaceuticals stamps LIGHT volume with a dominant AIR pathway (100.0% air releases) across 3 chemicals · 1 carcinogen-classified. Cumulative Form-R extract: 5.3K lbs (2020–2024). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Kedrion Biopharma and Sherwin-Williams Co.
Alnylam Pharmaceuticals vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
5.3K lbs Top 43% higher than 57% of 25,986 reporting TRI facilities
Each bar is a $1M-wide band; taller bars hold more reporting TRI facilities. The dashed line and filled bar mark this facility. Hover, focus, or tap a bar for its full count, share, and position.
Source U.S. Environmental Protection Agency, Toxics Release Inventory · 2023 reporting year
Alnylam Pharmaceuticals: Acetonitrile-led volume
Among the 3,917 Chemicals facilities in this database, Alnylam Pharmaceuticals reports the 2,285th-largest volume (5.3K lbs). Its reported volume is concentrated rather than spread: Acetonitrile alone is 92.1% of the total. Scale peers outside Massachusetts include Kedrion Biopharma and Sherwin-Williams Co.
Concentrated means ≥60% of Alnylam Pharmaceuticals's pounds in one chemical - here Acetonitrile at 92.1%. Not a toxicity score.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Alnylam Pharmaceuticals's total reported releases rose from 1.5 thousand lb in 2022 to 2.2 thousand lb in 2023, based on EPA TRI filings.
- Alnylam Pharmaceuticals's chemicals reported rose from 2 in 2022 to 3 in 2023, based on EPA TRI filings.
- Alnylam Pharmaceuticals's air releases rose from 1.5 thousand lb in 2022 to 2.2 thousand lb in 2023, based on EPA TRI filings.
Alnylam Pharmaceuticals Form-R facts
Compare this facility
See how Alnylam Pharmaceuticals stacks up against nearby facilities and the typical reporter.
92% less than the comparison
About the same as the comparison
Comparison reflects reported pounds and chemical counts, not toxicity or health risk. Averages cover facilities reporting any release.
How does this facility release toxic chemicals?
How Alnylam Pharmaceuticals releases toxic chemicals into the environment. Total: 7.5K lbs.
Emissions Trend Summary
From 2020 to 2024, total releases increased by 216% (667 lbs to 2.1K lbs).
Alnylam Pharmaceuticals: annual Form-R pounds
LIGHT site · AIR pathway · TRI years 2020–2024
- 2020 0
- 2021 0
- 2022 0
- 2023 0
- 2024 0
What this shows Alnylam Pharmaceuticals year-over-year reported totals (increased by 216% from 2020 to 2024). TRI figures are self-reported estimates and can swing with production, waste handling, and reporting changes, not only with controls. Lead chemical in the extract: Acetonitrile.
| Year | Total | Chemicals |
|---|---|---|
| 2020 | 667 lbs | 2 |
| 2021 | 997 lbs | 2 |
| 2022 | 1.5K lbs | 2 |
| 2023 | 2.2K lbs | 3 |
| 2024 | 2.1K lbs | 2 |
Chemical Releases
Aggregated across all reporting years (2020–2024). 1 of 3 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Acetonitrile | 6.9K lbs | - |
| Toluene | 549 lbs | - |
| Pyridine | 42 lbs | Carcinogen |
Alnylam Pharmaceuticals · AIR-pathway site
Nearest TRI Facilities to Alnylam Pharmaceuticals
Closest other reporters in Massachusetts - including Waters Technology Corp, Qg Printing II Corp, Professional Contract Sterilization Inc (pcs), ordered by distance.
Showing 8 of 372 other reporting facilities in Massachusetts.
Similar Chemicals Facilities
Other Chemicals facilities with similar total release volumes (±80%), outside Massachusetts - e.g. Kedrion Biopharma, Sherwin-Williams Co, Safc Inc..
Compare beyond Massachusetts
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Alnylam Pharmaceuticals on cumulative reported pounds (5.3K lbs) and distinct chemical count (3). Release-pound peers include Martin Operating Ptnr-Fourchon 15, Delta Marine Industries Inc., Ptc Tubular Products LLC. Chemical-count peers include Industrial C&s of Pr LLC Arecibo Plant, Island Litho Corp., Fenwal International Inc. Neighborhoods are forced disjoint so each axis surfaces a different set of sites.
Similar reported release pounds
Nearest out-of-state reporters (≥1,000 lbs) by absolute TRI pounds, not same-industry or same-county neighbors.
- Martin Operating Ptnr-Fourchon 15 Golden Meadow, LA · Petroleum Bulk Terminals 5.3K lbs reported
- Delta Marine Industries Inc. Seattle, WA · Transportation Equipment 5.3K lbs reported
- Ptc Tubular Products LLC Fairbury, IL · Primary Metals 5.3K lbs reported
- Kedrion Biopharma Melville, NY · Chemicals 5.3K lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
About TRI Data
Data as of 2023 reporting year. Source: U.S. Environmental Protection Agency (EPA) Toxic Release Inventory.
On this page the largest disclosed chemicals include Acetonitrile, Toluene, Pyridine; nearby reporters include Waters Technology Corp. Alnylam Pharmaceuticals stamps LIGHT volume · AIR pathway · TRACE-CARC carcinogen-lbs on this Form-R extract. Totals are self-reported estimates under EPCRA §313, not measured stack emissions or a health-risk score.
Use and verify this record
This Alnylam Pharmaceuticals TRI extract (LIGHT · AIR · TRACE-CARC · lead Acetonitrile) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Alnylam Pharmaceuticals totals are self-reported EPCRA §313 estimates for Norton, MA, latest year 2023. Form-R rows span 2020–2024 (5 years). NAICS 325412 · Chemicals. 0.2% of Bristol TRI pounds in this extract. Nearest ABS peer: Martin Operating Ptnr-Fourchon 15 (Δ 4 lbs). Pounds ≠ exposure.
Alnylam Pharmaceuticals stamps LIGHT volume · AIR pathway · TRACE-CARC · lead Acetonitrile. PlainEnviro renders this EPA Form-R extract from its pipeline; no figure is typed in by an editor. Corrections: editorial policy.
All federal data sources used on this page
- EPA Toxics Release Inventory (TRI) Basic Data Files - annual self-reported chemical-release filings. epa.gov
- EPA TRI Program reference - how chemicals and reported releases are counted. epa.gov
- EPA Facility Registry Service - facility location and identity. epa.gov
- EPA ECHO - regulatory and compliance context. epa.gov
- EPA Envirofacts - the EPA data warehouse exposing these datasets. epa.gov