Mystic
CHARLESTOWN, MA · Middlesex · NAICS 221112
Data updated May 2026
Mystic sits in the upper third of EPA GHGRP reporters by latest CO₂e (#970 of 8,713 nationally, #6 of 92 in MA).
- National rank #970 of 8,713 GHGRP facilities
- #6 of 92 in MA
- #611 of 1,732 in Power Plants
- 5.9% of CONSTELLATION ENERGY parent CO₂e
- 2023 mix: 0.1% non-CO₂ (N₂O-led)
- -85.8% since 2011
Mystic vs all U.S. GHGRP facilities
Where this site's latest reported Scope 1 CO₂e sits among every EPA GHGRP reporting facility
528,357 970th of 8713 higher than 7,743 of 8,713 facilities
GHGRP facilities, banded by latest reported CO₂e (MT)
Each bar is a band; taller bars hold more facilities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA Greenhouse Gas Reporting Program · 2023
Facility footprint context
This site accounts for 5.9% of CONSTELLATION ENERGY reported parent CO₂e (528K MT of 8.9M MT ; #5 of 10 GHGRP facilities under that parent ). Inside the EPA Power Plants sector it ranks #611 of 1,732 facilities by latest CO₂e. Shares use GHGRP facility rollups only, not Scope 2/3 or non-reporting sites.
2023 gas mix desk
Of 528K MT CO₂e reported for 2023, non-CO₂ gases are 0.1% , led by N₂O at 0.1% . Component shares use this facility's GHGRP CO₂ / CH₄ / N₂O rows for that year (already CO₂e-weighted).
- CO₂
- 99.9%
- 528K MT
- CH₄
- 0%
- 245 MT
- N₂O
- 0.1%
- 291 MT
Emissions decline across reporting years
| Year | Total CO2e (MT) |
|---|---|
| 2023 | 528,357 |
| 2022 | 648,963 |
| 2021 | 494,754 |
| 2020 | 769,671 |
| 2019 | 907,565 |
| 2018 | 1,941,333 |
| 2017 | 2,888,522 |
| 2016 | 2,866,057 |
| 2015 | 1,275,034 |
| 2014 | 845,869 |
| 2013 | 2,871,198 |
| 2012 | 3,394,085 |
| 2011 | 3,728,018 |
Facility insight: Mystic
Mystic (GHGRP ID 1000653) is a high-volume reporter at 528K MT CO₂e in 2023 from CHARLESTOWN, MA (#970 of 8,713 nationally) under Power Plants (NAICS 221112).
Across 2011–2023, annual CO₂e fell 85.8%; peak load was 3.7M MT in 2011. This facility has filed every year from 2011 to 2023, a complete 13-year record.
Peak year was 2011 at 3.7M MT CO2e; latest 2023 sits 85.8% below that peak (528K MT). The largest year-to-year move was 2013→2014 (-70.5%, 2.0M MT).
Frequently Asked Questions
Where does Mystic rank among U.S. GHGRP facilities? ▼
According to the EPA Greenhouse Gas Reporting Program, Mystic ranks #970 of 8,713 reporting facilities by latest reported CO₂e, and #6 of 92 facilities in MA (same sort as the state facility table). See /methodology#corpus-placement.
What share of GHGRP facilities report less CO₂e than Mystic? ▼
Mystic's 528K MT CO₂e is higher than 7,743 of the 8,713 GHGRP facilities with reported emissions (89%), an exact count from the full corpus, not an estimate.
How much CO2 does Mystic emit? ▼
Mystic reported 528K MT CO2e in 2023.
What share of CONSTELLATION ENERGY does Mystic represent? ▼
Mystic accounts for 5.9% of CONSTELLATION ENERGY's reported GHGRP CO₂e (528K MT of 8.9M MT), ranking #5 of 10 facilities under that parent.
What is Mystic's 2023 CO₂ / CH₄ / N₂O mix? ▼
In 2023, non-CO₂ gases were 0.1% of reported CO₂e at Mystic, with N₂O the larger non-CO₂ share at 0.1% (CO₂ 99.9%). Shares use the facility's GHGRP gas components for that year.
Where does Mystic rank inside Power Plants? ▼
Among EPA GHGRP facilities tagged Power Plants, Mystic ranks #611 of 1,732 by latest reported CO₂e.
Is Mystic reducing emissions? ▼
Over 13 reporting years (2011–2023), Mystic's emissions have decreased by 85.8%. This suggests meaningful progress in emissions reduction.
Nationwide facilities with similar CO₂e or sector
Peer sets outside MA for a top-third GHGRP emitter: CO₂e totals first, then Power Plants neighbors.
Similar reported CO₂e
Nearest latest-year facility totals outside MA (528K MT here).
Similar Power Plants CO₂e
Nearest same-sector facility totals outside MA.