National Cement
12 facilities · 2 states · 166.2K lbs total releases
According to the EPA Toxics Release Inventory, National Cement is the reported parent of 12 Form R facilities across 2 states, disclosing 166.2K lbs of toxic releases. 1 of 47 reported chemicals carry a carcinogen classification in the TRI extract. The heaviest-reporting state by release volume is California (118.7K lbs). Those TRI figures remain self-reported disclosure pounds for National Cement, including carcinogen-flagged substances, not a measured public-health risk score.
Release-over-release change
What changed for National Cement: EPA TRI 2023 reporting year
Same facilities, both years
+9.7%
12 facilities that filed in 2022 and 2023
Whole inventory
+9.7%
26.4 thousand lb → 29.0 thousand lb, every facility that filed
- National Cement's total reported releases rose from 26.4 thousand lb in 2022 to 29.0 thousand lb in 2023, based on EPA TRI filings.
- National Cement's water releases fell from 512 lb in 2022 to 281 lb in 2023, based on EPA TRI filings.
- National Cement's air releases rose from 25.6 thousand lb in 2022 to 28.4 thousand lb in 2023, based on EPA TRI filings.
- National Cement's off-site transfers fell from 333 lb in 2022 to 319 lb in 2023, based on EPA TRI filings.
TRI parent disclosure trail
Read National Cement from filing to facility
Largest Form R sites under this parent: National Cement Co of California Inc; National Cement Co. of Alabama Inc.; National Ready Mix Concrete Co.; National Ready Mix Concrete Co .. Neighbor parents on the disclosure ladder: Clean Harbors Inc; Waste Management Inc. Largest disclosed chemicals by pounds: Ammonia; Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Manganese; Chromium; Lead compounds. Heaviest-reporting states in this extract: California; Alabama. Industry labels on the parent rollup: 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: National Cement Co of California Inc; National Cement Co. of Alabama Inc.; National Ready Mix Concrete Co.; National Ready Mix Concrete Co .. Neighbor parents on the disclosure ladder: Clean Harbors Inc; Waste Management Inc. Largest disclosed chemicals by pounds: Ammonia; Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Manganese; Chromium; Lead compounds. Heaviest-reporting states in this extract: California; Alabama. Industry labels on the parent rollup: Nonmetallic Mineral Product.
National Cement ranks #1,373 of 4,988 slug-merged TRI parents, a smaller disclosed-volume parent relative to the national Form R parent set. National Cement files across 2 states, a regional parent portfolio rather than a single-state discloser. Releases are facility-concentrated: National Cement Co of California Inc accounts for most of National Cement's disclosed pounds, so peer comparisons should weight that site, not an even portfolio average.
Parent aggregation for National Cement 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 National Cement sits among TRI parents
National Cement 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 #1,371 · 52.2M lbs
- Waste Management Inc · rank #1,372 · 19.2M lbs
Largest chemicals disclosed by National Cement
Ammonia; Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Manganese; Chromium; Lead compounds lead the Form R pound rollup for this parent, including filings such as National Cement Co of California Inc. Pound totals, not toxicity-weighted risk.
| Chemical | Disclosed lbs |
|---|---|
| Ammonia | 95.8K lbs |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 63.3K lbs |
| Manganese | 2.4K lbs |
| Chromium | 2.2K lbs |
| Lead compounds | 1.2K lbs |
Where does this company operate?
| State | Facilities | Total Releases |
|---|---|---|
| California | 11 | 118.7K lbs |
| Alabama | 1 | 47.5K lbs |
Facilities (12)
| Facility | Releases |
|---|---|
| National Cement Co of California Inc Lebec, CA | 118.0K lbs |
| National Cement Co. of Alabama Inc. Ragland, AL | 47.5K lbs |
| National Ready Mix Concrete Co. Los Angeles, CA | 220 lbs |
| National Ready Mix Concrete Co . Artesia, CA | 129 lbs |
| National Ready Mix Concrete Co . Los Angeles, CA | 92 lbs |
| National Ready Mix Concrete Co . Canoga Park, CA | 87 lbs |
| National Ready Mix Concrete Co . Sun Valley, CA | 82 lbs |
| National Ready Mix Concrete Co . Van Nuys, CA | 82 lbs |
| National Ready Mix Concrete Co . Irvine, CA | 64 lbs |
| National Ready Mix Concrete Co . Irwindale, CA | 0 lbs |
| National Ready Mix Concrete Co . Moorpark, CA | 0 lbs |
| National Ready Mix Concrete Co . Santa Clarita, CA | 0 lbs |
Frequently Asked Questions
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Compare beyond the release ladder
Nationwide peers by disclosed pounds & facility count
Cross-portfolio TRI parents nearest National Cement on total disclosed release pounds (166.2K lbs) and reporting facility count (12). Release-volume peers include Phibro Animal Health Corp, Amcor Flexibles N.a. Inc, Apex Tool Group LLC. Facility-count peers include Avery Dennison Corp, Bodycote Thermal Processing Inc, Harsco Corp. 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, Alabama; facility-reported names can vary across subsidiaries.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files
What to do with National Cement's TRI parent record
From National Cement, open National Cement Co of California Inc or compare against Clean Harbors Inc rather than reading rank alone.
- Open the largest Form R site for National Cement (National Cement Co of California Inc 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 National Cement 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
National Cement'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.