Continental Cement Co – Emissions Trend

Buffalo, IA · 2019–2023 · Parent: Summit Materials LLC

This page assembles 5 consecutive years of EPA Toxics Release Inventory Form R filings for Continental Cement Co, spanning 2019–2023. Each annual total aggregates on-site air emissions, surface-water discharges, land disposal, and off-site transfers reported by the facility under EPCRA Section 313, which requires disclosure whenever a listed chemical is manufactured, processed, or otherwise used above threshold quantities.

Reported releases opened at 153.0K in 2019 and closed at 169.5K in 2023 – a increase of 10.8% over the window. The chart below stacks the four TRI release media (air, water, land, off-site) and overlays the yearly total. The top contributor by cumulative mass is Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) at 697.2K, followed by Ammonia at 87.9K.

Because TRI figures are estimated, not metered, year-over-year deltas can reflect methodology revisions, ownership changes, or shifts in what a facility classifies as reportable, not only physical emission changes. Treat the trajectory as a disclosure record, and cross-reference with the EPA Enforcement and Compliance History Online (ECHO) system for the fuller regulatory picture on this nonmetallic mineral product facility.

Overall Trend
↑ Increasing (+10.8%)
2019 Total
153.0K lbs
2023 Total
169.5K lbs

Total Releases by Category

Air
Water
Land
Offsite Transfer
035.2K70.3K105.5K140.7K175.8K 20192020202120222023 Pounds Released

Year-over-Year Comparison

Year Total Chemicals YoY Change
2019 153.0K lbs 7 -
2020 158.6K lbs 6 +3.7%
2021 159.6K lbs 7 +0.6%
2022 175.8K lbs 7 +10.2%
2023 169.5K lbs 7 -3.6%

Top Chemicals by Year

Chemical 20192020202120222023 Total
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) 136.4K 138.6K 139.1K 138.3K 144.8K 697.2K
Ammonia 16.4K 17.0K 16.6K 18.5K 19.4K 87.9K
Chromium 14 - 14 11.8K 3.8K 15.7K
Manganese compounds - 1.6K 2.1K 4.2K 648 8.5K
Zinc compounds - 815 947 1.5K 583 3.9K
Lead And Lead Compounds 90 586 771 1.5K 262 3.2K
Mercury And Mercury Compounds - 24 24 24 25 97
Mercury compounds 23 - - - - 23

About This Data

Trend data is sourced from the EPA Toxic Release Inventory (TRI). Facilities report annually. Release quantities are self-reported estimates. Year-over-year changes may reflect changes in production, pollution control measures, reporting methodology, or chemical thresholds.

A decrease in reported releases does not necessarily indicate improved environmental performance, as it may reflect production cutbacks, facility closures, or changes in reporting requirements. Similarly, increases may reflect expanded production rather than degraded environmental practices.

Frequently Asked Questions

Is Continental Cement Co getting cleaner or dirtier?
Based on EPA TRI data from 2019–2023, Continental Cement Co's total toxic releases have increased by approximately 11%.
What time period does this trend data cover?
This page shows 5 years of EPA Toxic Release Inventory data from 2019–2023. Release quantities are self-reported estimates filed annually by the facility.