Chemicals manufacturers in Connecticut
Connecticut has 166 chemicals establishments employing 6,806 people (Census, 2023), and EPA's ECHO database lists 136 active chemicals facilities in the state. By employment it is Connecticut's number 7 manufacturing industry, and Connecticut ranks number 30 among states for it.
- NAICS subsector
- 325
- Chemical Manufacturing
- Establishments
- 166
- Census 2023
- Employees
- 6,806
- Census 2023
- In EPA records
- 136
- With a page here
- 7
- Revised
- November 11, 2026
Chemicals factories with a page
| Facility | What it makes (NAICS) | City |
|---|---|---|
| Americas Styrenics Polystyrene Plant | Plastics Material and Resin Manufacturing | Ledyard (Gales Ferry) |
| Chemtura | All Other Basic Organic Chemical Manufacturing | Naugatuck |
| Hampford Research Inc | All Other Basic Organic Chemical Manufacturing | Stratford |
| Pfizer Incorporated, Manufacturing and Research | Medicinal and Botanical Manufacturing | Groton |
| Pharmacia & Upjohn (Former) | Pharmaceutical Preparation Manufacturing | North Haven |
| Resin Solutions LLC - Stratford Facility | All Other Basic Organic Chemical Manufacturing | Stratford |
| Vanderbilt Chemicals, LLC Bethel | All Other Miscellaneous Chemical Product and Preparation Manufacturing | Bethel |
These are the Connecticut chemicals facilities that report to EPA's Toxics Release Inventory. The other 129 in EPA records don't have a page yet.
What these factories make
- All Other Basic Organic Chemical Manufacturing (NAICS 325199): 4 facilities
- Petrochemical Manufacturing (NAICS 325110): 3 facilities
- Medicinal and Botanical Manufacturing (NAICS 325411): 2 facilities
- Pharmaceutical Preparation Manufacturing (NAICS 325412): 2 facilities
- Plastics Material and Resin Manufacturing (NAICS 325211): 1 facility
- All Other Miscellaneous Chemical Product and Preparation Manufacturing (NAICS 325998): 1 facility
Where they cluster
Cities with the most active chemicals facilities in EPA records: Danbury (10), New Haven (7), Wallingford (7), Rocky Hill (6), Waterbury (6).
Chemicals manufacturing across the US. Everything made in Connecticut.