Northwest Pipe Co
6 facilities · 4 states · 48.9K lbs total releases
According to the EPA Toxics Release Inventory, Northwest Pipe Co is the reported parent of 6 Form R facilities across 4 states, disclosing 48.9K lbs of toxic releases. 1 of 9 reported chemicals carry a carcinogen classification in the TRI extract. The heaviest-reporting state by release volume is California (36.1K lbs). Those TRI figures remain self-reported disclosure pounds for Northwest Pipe Co, including carcinogen-flagged substances, not a measured public-health risk score.
Release-over-release change
What changed for Northwest Pipe Co: EPA TRI 2023 reporting year
Same facilities, both years
-35.1%
3 facilities that filed in 2022 and 2023
Whole inventory
-35.1%
2.8 thousand lb → 1.8 thousand lb, every facility that filed
- Northwest Pipe Co's total reported releases fell from 2.8 thousand lb in 2022 to 1.8 thousand lb in 2023, based on EPA TRI filings.
- Northwest Pipe Co's air releases fell from 182 lb in 2022 to 108 lb in 2023, based on EPA TRI filings.
- Northwest Pipe Co's off-site transfers fell from 2.6 thousand lb in 2022 to 1.7 thousand lb in 2023, based on EPA TRI filings.
TRI parent disclosure trail
Read Northwest Pipe Co from filing to facility
Largest Form R sites under this parent: Northwest Pipe Co; Northwest Pipe Co; Northwest Pipe Co; Northwest Pipe Co. Neighbor parents on the disclosure ladder: Clean Harbors Inc; Waste Management Inc. Largest disclosed chemicals by pounds: Manganese; Di(2-ethylhexyl) phthalate; Anthracene; Diisocyanates. Heaviest-reporting states in this extract: California; Oregon; Texas. Industry labels on the parent rollup: Primary Metals; Chemicals; Fabricated Metals; Nonmetallic Mineral Product. Start from those named sites and neighbors rather than a generic parent blurb; pounds stay disclosure, not risk.
Largest Form R sites under this parent: Northwest Pipe Co; Northwest Pipe Co; Northwest Pipe Co; Northwest Pipe Co. Neighbor parents on the disclosure ladder: Clean Harbors Inc; Waste Management Inc. Largest disclosed chemicals by pounds: Manganese; Di(2-ethylhexyl) phthalate; Anthracene; Diisocyanates. Heaviest-reporting states in this extract: California; Oregon; Texas. Industry labels on the parent rollup: Primary Metals; Chemicals; Fabricated Metals; Nonmetallic Mineral Product.
Northwest Pipe Co ranks #2,004 of 4,988 slug-merged TRI parents, a smaller disclosed-volume parent relative to the national Form R parent set. Northwest Pipe Co files across 4 states, a regional parent portfolio rather than a single-state discloser. Northwest Pipe Co's disclosed pounds are spread across 6 facilities, no single site dominates the parent total in this extract.
Parent aggregation for Northwest Pipe Co follows facility-reported names. Compare the named neighbors (Clean Harbors Inc; Waste Management Inc) before treating rank as a hazard score; TRI stays self-reported and unweighted by toxicity.
Where Northwest Pipe Co sits among TRI parents
Northwest Pipe Co sits on a disclosure ladder beside Clean Harbors Inc and Waste Management Inc. Open those parents for a different facility count, state span, and chemical mix.
Higher disclosed volume
- Clean Harbors Inc · rank #2,002 · 52.2M lbs
- Waste Management Inc · rank #2,003 · 19.2M lbs
Largest chemicals disclosed by Northwest Pipe Co
Manganese; Di(2-ethylhexyl) phthalate; Anthracene; Diisocyanates lead the Form R pound rollup for this parent, including filings such as Northwest Pipe Co. Pound totals, not toxicity-weighted risk.
| Chemical | Disclosed lbs |
|---|---|
| Manganese | 39.5K lbs |
| Di(2-ethylhexyl) phthalate | 9.4K lbs |
| Anthracene | 0 lbs |
| Diisocyanates | 0 lbs |
Where does this company operate?
| State | Facilities | Total Releases |
|---|---|---|
| California | 3 | 36.1K lbs |
| Oregon | 1 | 7.1K lbs |
| Texas | 1 | 4.9K lbs |
| Missouri | 1 | 751 lbs |
Facilities (6)
| Facility | Releases |
|---|---|
| Northwest Pipe Co Adelanto, CA | 26.4K lbs |
| Northwest Pipe Co Brea, CA | 9.4K lbs |
| Northwest Pipe Co Portland, OR | 7.1K lbs |
| Northwest Pipe Co Saginaw, TX | 4.9K lbs |
| Permalok-A Northwest Pipe Co Saint Louis, MO | 751 lbs |
| Northwest Pipe Co Tracy, CA | 267 lbs |
Frequently Asked Questions
How much pollution does Northwest Pipe Co release?
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Does Northwest Pipe Co release carcinogens?
Compare beyond the release ladder
Nationwide peers by disclosed pounds & facility count
Cross-portfolio TRI parents nearest Northwest Pipe Co on total disclosed release pounds (48.9K lbs) and reporting facility count (6). Release-volume peers include Chase Corp, Ahp-Veranova L.P., Valmet Inc. Facility-count peers include Abbott Laboratories, Agribeef Co, Allnex USA Inc. Neighborhoods are forced disjoint so each axis surfaces a different set of parents.
Similar disclosed release pounds
Nearest parents (≥3 facilities, ≥10k lbs) by absolute TRI disclosed pounds, not rank-adjacent ladder neighbors.
Similar facility count
Nearest parents by reporting-site count (deduped against the release-pound neighborhood).
About This Data
EPA TRI parent totals cover all media. This extract's heaviest states for the parent are California, Oregon, Texas; facility-reported names can vary across subsidiaries.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files
What to do with Northwest Pipe Co's TRI parent record
From Northwest Pipe Co, open Northwest Pipe Co or compare against Clean Harbors Inc rather than reading rank alone.
- Open the largest Form R site for Northwest Pipe Co (Northwest Pipe Co in CA). Largest facility
- Compare against Waste Management Inc, the next-higher disclosed-volume parent. Higher-volume parent
- Browse the full parent release ranking to see where Northwest Pipe Co sits among all slug-merged TRI parents. All parent companies
Rank and peers (Clean Harbors Inc, Waste Management Inc) are disclosure volume only, not toxicity-weighted risk or enforcement status.
Use and verify this record
Northwest Pipe Co's record groups disclosed TRI parent-company filings so readers can compare reporting context without treating the total as a measure of risk.
Company release figures are computed directly from EPA Toxic Release Inventory data; source names and the record-linking method are documented in the methodology.
Primary sources
- EPA Toxics Release Inventory Basic Data Files - annual facility-level chemical-release disclosures
PlainEnviro renders public EPA records directly from its data pipeline; no figure on this page is typed in by an editor. See the editorial standards and corrections policy for how source changes and reported errors are handled.