CLEAN HARBORS INC
For the period ended Dec 31, 2025. Filed Feb 18, 2026.
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FY2025 · Filed Feb 18, 2026
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(9) Closure and Post-Closure Liabilities
The changes to closure and post-closure liabilities (also referred to as “asset retirement obligations”) from January 1, 2024 through December 31, 2025 were as follows (in thousands):
| LandfillRetirementLiability | Non-LandfillRetirementLiability | Total | |
|---|---|---|---|
| Balance at January 1, 2024 | $59,443 | $59,157 | $118,600 |
| Liabilities assumed in acquisitions | — | 11,421 | 11,421 |
| New asset retirement obligations | 2,118 | — | 2,118 |
| Accretion | 5,069 | 4,489 | 9,558 |
| Changes in estimates recorded to consolidated statement of operations | 70 | (295) | (225) |
| Changes in estimates recorded to consolidated balance sheet | 4,335 | 402 | 4,737 |
| Environmental expenditures | (11,210) | (4,466) | (15,676) |
| Currency translation and other | (425) | (320) | (745) |
| Balance at December 31, 2024 | 59,400 | 70,388 | 129,788 |
| Measurement period adjustments from prior period acquisitions | — | 420 | 420 |
| New asset retirement obligations | 3,839 | — | 3,839 |
| Accretion | 5,013 | 5,552 | 10,565 |
| Changes in estimates recorded to consolidated statement of operations | 446 | (332) | 114 |
| Changes in estimates recorded to consolidated balance sheet | (4,410) | 906 | (3,504) |
| Environmental expenditures | (4,719) | (1,446) | (6,165) |
| Currency translation and other | 194 | 77 | 271 |
| Balance at December 31, 2025 | $59,763 | $75,565 | $135,328 |
In the year ended December 31, 2025, there were no significant benefits or charges resulting from changes in estimates for closure and post-closure liabilities.
Anticipated payments (based on current estimated costs and anticipated timing of necessary regulatory approvals to commence work on closure and post-closure activities) for each of the next five years and thereafter are as follows (in thousands):
| Years ending December 31, | |
|---|---|
| 2026 | $10,290 |
| 2027 | 13,906 |
| 2028 | 20,063 |
| 2029 | 8,738 |
| 2030 | 1,723 |
| Thereafter | 294,466 |
| Undiscounted closure and post-closure liabilities | 349,186 |
| Less: Discount at credit-adjusted risk-free rate | (115,489) |
| Less: Undiscounted estimated closure and post-closure liabilities relating to airspace not yet consumed | (98,369) |
| Present value of closure and post-closure liabilities | $135,328 |
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