EmissionsLookup
Non-Compliance TRI Reporter Clean Air Act Clean Water Act RCRA

MONSANTO SODA SPRINGS PLANT

Quick Summary

  • Released 6,054,672 lbs of toxic chemicals to the environment in the most recent TRI reporting year.
  • Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
  • Assessed $6,300 in total penalties since records began.
  • Reports releases of chemicals classified as known or probable carcinogens.
Address
1853 ID-34
SODA SPRINGS, ID 83276
View on map ↗
County
CARIBOU County
Industry
Manufacturing
NAICS (North American Industry Classification)
325180
Inspections
4 · last Oct 30, 2025
Total Penalties
$6,300 · last Jan 4, 2024
Registry ID
110000743982

How This Compares

#2 of 114 TRI reporters in ID
#23 of 16,877 TRI reporters in Manufacturing

Ranked by most recent year's total TRI releases.

Compliance Status (Last 12 Quarters)

Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.

1
Air (CAA)
Qtrs Non-Compliant
0
Water (CWA)
Qtrs Non-Compliant
2
Hazardous Waste (RCRA)
Qtrs Non-Compliant

TRI Toxic Chemical Releases

Annual pounds of each toxic chemical released to air, water, and land, as reported to the EPA Toxic Release Inventory. Carcinogen (♦) and PFAS designations are per EPA and IARC classifications.

Emissions Trend (2015–2024) -26% overall
Year Total Releases (lbs) vs Prior Year
2015 5,975,646
2016 4,716,882 -21%
2017 6,054,672 +28%
2018 5,953,208 -2%
2019 4,610,965 -23%
2020 5,721,460 +24%
2021 4,398,912 -23%
2022 4,459,431 +1%
2023 4,002,052 -10%
2024 4,432,339 +11%

2024

Chemical Total (lbs) Air Water Land Off-Site
Zinc compounds 2,488,948 49,022 2,439,926 9
Vanadium compounds 741,724 683 741,041 9
Chromium compounds (except for chromite ore mined in the Transvaal Region) 469,052 3,958 465,094 4
Cadmium compounds 246,161 3,887 242,274 0 ♦ Carcinogen
Manganese compounds 105,554 157 105,397
Copper compounds 65,849 239 65,610 5
Selenium compounds 61,790 3,410 58,380 0
Nickel compounds 54,749 436 54,313 1 ♦ Carcinogen
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) 52,090 52,090
Arsenic compounds 45,277 327 44,950 0 ♦ Carcinogen
Lead compounds 40,567 361 40,206 0
Antimony compounds 16,067 684 15,383 5
Hydrogen cyanide 15,189 15,189
Hydrogen sulfide 9,915 9,915
Carbonyl sulfide 4,820 4,820
Phosphorus (yellow or white) 4,693 507 4,186 1,555
Hydrogen fluoride 4,568 4,568
Phosphine 4,491 4,491
Mercury compounds 835 594 241 0

2023

Chemical Total (lbs) Air Water Land Off-Site
Zinc compounds 2,223,526 46,174 304 2,177,048 6
Vanadium compounds 679,962 623 81 679,258 8
Chromium compounds (except for chromite ore mined in the Transvaal Region) 434,402 3,913 26 430,463 4
Cadmium compounds 218,648 3,880 214,768 0 ♦ Carcinogen
Manganese compounds 98,629 153 98,476
Copper compounds 59,945 226 24 59,694 4
Selenium compounds 56,167 3,395 38 52,734 0
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) 52,237 52,237
Nickel compounds 49,312 424 32 48,856 1 ♦ Carcinogen
Arsenic compounds 40,659 325 2 40,332 0 ♦ Carcinogen
Lead compounds 36,483 349 36,134 0
Antimony compounds 14,560 649 13,911 8
Hydrogen cyanide 13,963 13,963
Hydrogen sulfide 9,074 9,074
Carbonyl sulfide 4,421 4,421
Phosphine 4,291 4,291
Hydrogen fluoride 4,239 4,239
Mercury compounds 901 682 219 0
Phosphorus (yellow or white) 631 631 1,466

2022

Chemical Total (lbs) Air Water Land Off-Site
Zinc compounds 2,353,121 52,916 17 2,300,188 5
Vanadium compounds 833,320 592 7 832,721 7
Chromium compounds (except for chromite ore mined in the Transvaal Region) 546,613 5,353 541,260 3
Cadmium compounds 225,919 4,164 221,755 0 ♦ Carcinogen
Manganese compounds 126,926 159 126,767
Copper compounds 71,948 273 71,675 3
Selenium compounds 60,833 4,362 56,471 0
Nickel compounds 57,329 445 56,884 1 ♦ Carcinogen
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) 46,626 46,626
Arsenic compounds 45,083 366 2 44,715 0 ♦ Carcinogen
Lead compounds 41,174 380 40,794 0
Antimony compounds 16,619 736 15,883 7
Hydrogen cyanide 13,885 13,885
Hydrogen sulfide 8,714 8,714
Hydrogen fluoride 4,931 4,931
Phosphine 4,478 4,478
Mercury compounds 986 730 256 0
Carbonyl sulfide 529 529
Phosphorus (yellow or white) 399 399 1,065

2021

Chemical Total (lbs) Air Water Land Off-Site
Zinc compounds 2,516,648 51,096 200 2,465,353 5
Vanadium compounds 712,652 555 43 712,054 6
Chromium compounds (except for chromite ore mined in the Transvaal Region) 448,956 5,366 443,590 3
Cadmium compounds 248,679 4,193 244,486 0 ♦ Carcinogen
Manganese compounds 99,927 153 0 99,773
Copper compounds 63,720 267 63,453 3
Selenium compounds 62,865 4,384 58,481 0
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) 54,423 54,423
Nickel compounds 53,389 443 2 52,943 1 ♦ Carcinogen
Arsenic compounds 44,883 367 3 44,513 0 ♦ Carcinogen
Lead compounds 40,013 372 39,641 0
Antimony compounds 15,834 715 5 15,114 5
Hydrogen cyanide 13,934 13,934
Hydrogen sulfide 9,080 9,080
Phosphine 4,320 4,320
Hydrogen fluoride 4,268 4,268
Carbonyl sulfide 3,230 3,230
Mercury compounds 1,213 977 1 235 0
Phosphorus (yellow or white) 878 615 263 987

2020

Chemical Total (lbs) Air Water Land Off-Site
Zinc compounds 3,419,224 50,724 129 3,368,372 4
Vanadium compounds 868,757 717 58 867,982 5
Chromium compounds (except for chromite ore mined in the Transvaal Region) 525,707 5,039 7 520,662 4
Cadmium compounds 340,949 3,844 337,105 0 ♦ Carcinogen
Manganese compounds 112,615 159 112,456
Selenium compounds 79,876 4,035 12 75,829 0
Copper compounds 79,865 258 1 79,606 2
Nickel compounds 69,567 425 69,142 1 ♦ Carcinogen
Arsenic compounds 59,230 341 3 58,886 0 ♦ Carcinogen
Lead compounds 52,598 361 52,237 2
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) 52,419 52,419
Antimony compounds 20,108 703 19,405 6
Hydrogen cyanide 15,149 15,149
Hydrogen sulfide 9,870 9,870
Carbonyl sulfide 4,689 4,689
Phosphine 4,559 4,559
Hydrogen fluoride 4,398 4,398
Mercury compounds 1,193 895 1 297 0
Phosphorus (yellow or white) 687 609 78 1,142

2019

Chemical Total (lbs) Air Water Land Off-Site
Zinc compounds 3,582,283 46,678 483 3,535,122 4
Vanadium compounds 894,449 693 87 893,669 5
Manganese compounds 113,903 149 50 113,704
Hydrogen cyanide 14,494 14,494
Phosphine 4,505 4,505
Mercury compounds 1,332 1,010 1 321 0

2018

Chemical Total (lbs) Air Water Land Off-Site
Zinc compounds 3,510,107 49,497 52 3,460,558 7
Vanadium compounds 950,733 798 29 949,906 8
Chromium compounds (except for chromite ore mined in the Transvaal Region) 581,152 4,200 29 576,922 4
Cadmium compounds 344,521 4,601 339,920 0 ♦ Carcinogen
Manganese compounds 126,418 191 14 126,214
Selenium compounds 80,260 3,684 76,576 0
Nickel compounds 74,594 512 74,082 1 ♦ Carcinogen
Arsenic compounds 61,545 384 3 61,158 0 ♦ Carcinogen
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) 60,742 60,742
Lead compounds 55,804 392 55,412 0
Copper compounds 36,389 315 0 36,074 4
Antimony compounds 21,072 676 20,396 6
Hydrogen cyanide 15,872 15,872
Hydrogen sulfide 10,474 10,474
Hydrogen fluoride 9,357 9,357
Carbonyl sulfide 4,885 4,885
Phosphine 4,763 4,763
Phosphorus (yellow or white) 3,086 1,231 1,855 1,522
Mercury compounds 1,434 1,101 1 332 0

2017

Chemical Total (lbs) Air Water Land Off-Site
Zinc compounds 3,535,205 42,142 100 3,492,963 4
Vanadium compounds 984,127 2,487 981,640 5
Chromium compounds (except for chromite ore mined in the Transvaal Region) 603,954 3,434 7 600,513 3
Cadmium compounds 354,042 5,926 17 348,099 0 ♦ Carcinogen
Manganese compounds 132,686 257 132,429
Selenium compounds 82,628 2,955 75 79,598 0
Nickel compounds 76,379 775 75,604 1 ♦ Carcinogen
Arsenic compounds 63,298 481 3 62,814 0 ♦ Carcinogen
Lead compounds 57,437 454 56,983 0
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) 56,643 56,643
Copper compounds 38,585 438 38,147 2
Antimony compounds 21,616 610 21,006 5
Hydrogen cyanide 15,392 15,392
Hydrogen sulfide 10,254 10,254
Hydrogen fluoride 7,427 7,427
Carbonyl sulfide 4,914 4,914
Phosphine 4,502 4,502
Phosphorus (yellow or white) 3,969 1,179 2,790 1,855
Mercury compounds 1,615 1,278 1 337 0

2016

Chemical Total (lbs) Air Water Land Off-Site
Zinc compounds 2,550,499 39,917 531 2,510,051 5
Vanadium compounds 861,419 2,541 151 858,727 5
Chromium compounds (except for chromite ore mined in the Transvaal Region) 550,479 3,454 125 546,900 2
Cadmium compounds 254,741 5,972 38 248,731 0 ♦ Carcinogen
Manganese compounds 125,911 255 56 125,600
Selenium compounds 63,206 2,951 58 60,197 0
Nickel compounds 62,080 755 55 61,270 1 ♦ Carcinogen
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) 57,501 57,501
Arsenic compounds 49,022 484 8 48,530 0 ♦ Carcinogen
Lead compounds 45,044 449 0 44,595 0
Copper compounds 39,314 422 50 38,842 3
Antimony compounds 17,420 579 4 16,837 3
Hydrogen cyanide 14,275 14,275
Hydrogen sulfide 9,494 9,494
Hydrogen fluoride 7,302 7,302
Phosphine 4,343 4,343
Carbonyl sulfide 2,552 2,552
Mercury compounds 1,149 868 281 0
Phosphorus (yellow or white) 1,133 1,133 1,559

2015

Chemical Total (lbs) Air Water Land Off-Site
Zinc compounds 3,429,770 41,492 305 3,387,973 6
Vanadium compounds 1,006,602 2,511 1,004,091 7
Chromium compounds (except for chromite ore mined in the Transvaal Region) 620,470 3,450 73 616,947 3
Cadmium compounds 343,095 6,024 94 336,977 0 ♦ Carcinogen
Manganese compounds 136,848 260 136,588
Selenium compounds 79,329 2,977 43 76,309 0
Nickel compounds 77,577 766 26 76,785 1 ♦ Carcinogen
Arsenic compounds 62,654 489 6 62,159 0 ♦ Carcinogen
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) 58,803 58,803
Lead compounds 57,020 458 56,562 0
Copper compounds 39,774 434 26 39,314 4
Antimony compounds 21,479 600 2 20,877 4
Hydrogen cyanide 14,959 14,959
Hydrogen sulfide 9,744 9,744
Hydrogen fluoride 7,671 7,671
Phosphine 4,715 4,715
Carbonyl sulfide 2,761 2,761
Mercury compounds 1,216 877 0 339 0
Phosphorus (yellow or white) 1,159 1,159 2,738

Waste Management & Recycling

How this facility manages toxic chemicals beyond direct releases — through recycling, energy recovery, and on-site or off-site treatment. Data from the most recent TRI reporting year. Quantities in pounds.

Chemical Released Recycled Energy Recovery Treated
Hydrogen fluoride 133,501
Hydrogen sulfide 106,738
Carbonyl sulfide 229,364
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) 56,715
Phosphorus (yellow or white) 21,754 167,909
Phosphine 40,935
Hydrogen cyanide 132,345

Off-Site Transfer Destinations

Facilities to which toxic chemicals were transferred for disposal, recycling, energy recovery, or treatment during the most recent TRI reporting year. Quantities in pounds.

Destination Chemical Disposal Recycling Energy Rec. Treatment
CLEAN HARBORS GRASSY MOUNTAIN
KNOLLS, UT
Arsenic compounds 0
CLEAN HARBORS GRASSY MOUNTAIN
KNOLLS, UT
Zinc compounds 9
CLEAN HARBORS GRASSY MOUNTAIN
KNOLLS, UT
Selenium compounds 0
CLEAN HARBORS GRASSY MOUNTAIN
KNOLLS, UT
Vanadium compounds 9
CLEAN HARBORS GRASSY MOUNTAIN
KNOLLS, UT
Antimony compounds 5
CLEAN HARBORS GRASSY MOUNTAIN
KNOLLS, UT
Cadmium compounds 0
CLEAN HARBORS GRASSY MOUNTAIN
KNOLLS, UT
Copper compounds 5
CLEAN HARBORS GRASSY MOUNTAIN
KNOLLS, UT
Lead compounds 0
CLEAN HARBORS GRASSY MOUNTAIN
KNOLLS, UT
Nickel compounds 1
CLEAN HARBORS GRASSY MOUNTAIN
KNOLLS, UT
Mercury compounds 0
CLEAN HARBORS GRASSY MOUNTAIN
KNOLLS, UT
Chromium compounds (except for chromite ore mined in the Transvaal Region) 4
CLEAN HARBORS GRASSY MOUNTAIN
KNOLLS, UT
Phosphorus (yellow or white) 1,555

Compliance Violations

Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.

Program Type Violation Date Return to Compliance Status
rcra Standards Applicable to Generators of HW: General Oct 30, 2025 Oct 30, 2025 Resolved
caa FRV Sep 13, 2023 Open
caa FRV Nov 15, 2022 Open
caa FRV Dec 30, 2019 Open
caa FRV Oct 26, 2016 Open
rcra Standards Applicable to Generators of HW: General Dec 3, 2001 Jan 5, 2009 Resolved
rcra Land Disposal Restrictions: General Dec 3, 2001 Jan 5, 2009 Resolved
rcra Standards Applicable to Recordkeeping and Reporting Applicable to Small and Large Quantity Generators Jul 14, 1994 Aug 15, 1994 Resolved

Enforcement Actions

Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.

WRITTEN INFORMAL
RCRA (Hazardous Waste) · Case RCRA-IDD081830994-002 · Jan 6, 2026
Administrative - Formal
Clean Air Act · Case 3603831245 · Jan 4, 2024
$4,050
Notice of Violation
Clean Air Act · Case 3603713929 · Sep 11, 2023
Administrative - Formal
Clean Air Act · Case 3603520960 · Dec 28, 2022
$2,250
Notice of Violation
Clean Air Act · Case 3603438748 · Nov 25, 2022
Administrative - Formal
· Case 10-2021-0088 · Apr 23, 2021
Administrative - Formal
Clean Air Act · Case 3602364964 · Dec 21, 2020
$4,320
Notice of Violation
Clean Air Act · Case 3602264197 · Jul 30, 2020
Warning Letter
Clean Air Act · Case 3600841433 · Oct 25, 2016
Judicial
· Case 10-2011-0122 · Mar 26, 2015
$600,000
NO DECISION MADE, LETTER SENT TO FACILITY
RCRA (Hazardous Waste) · Case RCRA-IDD081830994-001 · Oct 20, 2004
Judicial
· Case 10-1997-0179 · Jun 29, 1998
Administrative - Formal
· Case 10-1999-0085 · Mar 19, 1991

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