EPA TRI Facility · Electric Utilities
Merrimack Station
Bow, NH · Parent: Gsp Merrimack LLC
- Total releases
- 202.8K lbs
- Chemicals reported
- 11
- Carcinogens
- 2
- Primary pathway
- Air Releases
AIR Form-R mix
Merrimack Station: how the 236.7K lbs splits
236.7K lbs across all reported pathways
- Air Releases 224.8K lbs 95.0%
- Off-site Transfers 5.9K lbs 2.5%
- Land Disposal 4.3K lbs 1.8%
- Water Discharges 1.7K lbs 0.7%
Merrimack Station's 236.7K lbs Form-R total is AIR - air releases is 95.0% of the bar. Next segment: off-site transfers at 2.5%. Leading chemical by pounds: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
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.
MID volume AIR pathway TRACE-CARC
Merrimack Station is an EPA Toxics Release Inventory reporter in Bow, NH, in the electric utilities sector. It reported 33.9K lbs of releases across 7 chemicals in 2024, and 202.8K lbs in total across its 2019-2024 reporting years. That ranks 3,220 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In New Hampshire's 119 reporting TRI sites, pounds #1 is not chemical-count #1. Merrimack Station is pounds #3 and chemical-count #5 at 202.8K lbs. Watts Regulator Co DBA Webster Valve leads reported pounds (472.0K lbs) at 10 chemicals (chemical-count #7). Sig Sauer Inc leads chemical count at 13 chemicals (8.7K lbs, pounds #34). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Kalwall Corp Flat Shee T Div; Pitco Frialator Inc; Heat & Control; Hooksett Crushed Stone Pike Industries Inc. Similar-scale Electric Utilities peers outside New Hampshire: Bayonne Energy Center; Domtar Paper Co LLC; Burlington Generating Station; Otter Tail Power Co Hoot Lake Plant. Largest disclosed chemicals by pounds: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Barium And Barium Compounds; Ammonia.
Merrimack Station stamps MID volume with a dominant AIR pathway (95.0% air releases) across 11 chemicals · 2 carcinogen-classified. Cumulative Form-R extract: 202.8K lbs (2019–2024). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Bayonne Energy Center and Domtar Paper Co LLC.
Merrimack Station vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
203K lbs Top 12% higher than 88% 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
Merrimack Station inside Merrimack's TRI pounds
Among the 513 Electric Utilities facilities in this database, Merrimack Station reports the 289th-largest volume (202.8K lbs). This one site accounts for 27.1% of every pound reported in Merrimack. Its reported volume is concentrated rather than spread: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) alone is 89.6% of the total. Scale peers outside New Hampshire include Bayonne Energy Center and Domtar Paper Co LLC.
County-dominant here means ≥25% of Merrimack's reported pounds (746.8K lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Merrimack Station's total reported releases fell from 66.1 thousand lb in 2022 to 30.6 thousand lb in 2023, based on EPA TRI filings.
- Merrimack Station's off-site transfers fell from 4.7 thousand lb in 2022 to 116 lb in 2023, based on EPA TRI filings.
- Merrimack Station's land releases fell from 3.7 thousand lb in 2022 to 238 lb in 2023, based on EPA TRI filings.
- Merrimack Station's air releases fell from 57.3 thousand lb in 2022 to 30.0 thousand lb in 2023, based on EPA TRI filings.
Merrimack Station Form-R facts
Compare this facility
See how Merrimack Station stacks up against nearby facilities and the typical reporter.
19.1× more than the comparison
3.7× more than 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 Merrimack Station releases toxic chemicals into the environment. Total: 236.7K lbs.
Emissions Trend Summary
From 2019 to 2024, total releases decreased by 32% (50.0K lbs to 33.9K lbs).
Merrimack Station: annual Form-R pounds
MID site · AIR pathway · TRI years 2019–2024
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
- 2024 0
What this shows Merrimack Station year-over-year reported totals (decreased by 32% from 2019 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: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 50.0K lbs | 7 |
| 2020 | 17.8K lbs | 7 |
| 2021 | 38.3K lbs | 7 |
| 2022 | 66.1K lbs | 9 |
| 2023 | 30.6K lbs | 7 |
| 2024 | 33.9K lbs | 7 |
Chemical Releases
Aggregated across all reporting years (2019–2024). 2 of 11 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 212.0K lbs | - |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 12.1K lbs | - |
| Barium And Barium Compounds | 7.4K lbs | - |
| Ammonia | 3.3K lbs | - |
| Lead And Lead Compounds | 906 lbs | - |
| Lead compounds | 534 lbs | - |
| Mercury And Mercury Compounds | 293 lbs | - |
| Mercury compounds | 137 lbs | - |
| Polycyclic aromatic compounds | 28 lbs | Carcinogen |
| Naphthalene | 22 lbs | Carcinogen |
| Benzo[g,h,i]perylene | 1 lbs | - |
Merrimack Station · AIR-pathway site
Nearest TRI Facilities to Merrimack Station
Closest other reporters in New Hampshire - including Kalwall Corp Flat Shee T Div, Pitco Frialator Inc, Heat & Control, ordered by distance.
Showing 8 of 118 other reporting facilities in New Hampshire.
Similar Electric Utilities Facilities
Other Electric Utilities facilities with similar total release volumes (±80%), outside New Hampshire - e.g. Bayonne Energy Center, Domtar Paper Co LLC, Burlington Generating Station.
Compare beyond New Hampshire
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Merrimack Station on cumulative reported pounds (202.8K lbs) and distinct chemical count (11). Release-pound peers include Southern Cast Products Inc, Cabinetworks Group - Mount Jackson Plant, Micro Motion Inc.. Chemical-count peers include Puerto Rico Energy LLC - Bayamon Terminal, Lanco Manufacturing Corp, Buckeye Caribbean Terminals LLC (former Scyi). 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.
- Southern Cast Products Inc Meridian, MS · Primary Metals 202.6K lbs reported
- Cabinetworks Group - Mount Jackson Plant Mount Jackson, VA · Furniture 203.0K lbs reported
- Micro Motion Inc. Boulder, CO · Computers and Electronic Products 202.5K lbs reported
- Reveille Cryogenic Plant Laredo, TX · Natural Gas Processing 202.4K lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
- Puerto Rico Energy LLC - Bayamon Terminal Bayamon, PR · Petroleum Bulk Terminals 11 chemicals
- Lanco Manufacturing Corp San Lorenzo, PR · Chemicals 11 chemicals
- Buckeye Caribbean Terminals LLC (former Scyi) Yabucoa, PR · Petroleum Bulk Terminals 11 chemicals
- Limetree Bay Terminals LLC DBA Ocean Point Terminals Christiansted, VI · Petroleum Bulk Terminals 11 chemicals
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 Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Barium And Barium Compounds, Ammonia; nearby reporters include Kalwall Corp Flat Shee T Div. Merrimack Station stamps MID 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 Merrimack Station TRI extract (MID · AIR · TRACE-CARC · lead Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Merrimack Station totals are self-reported EPCRA §313 estimates for Bow, NH, latest year 2023. Form-R rows span 2019–2024 (6 years). NAICS 221112 · Electric Utilities. 27.1% of Merrimack TRI pounds in this extract. Nearest ABS peer: Southern Cast Products Inc (Δ 203 lbs). Pounds ≠ exposure.
Merrimack Station stamps MID volume · AIR pathway · TRACE-CARC · lead Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size). 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