Environmental Liabilities and Expenditures (Tables)

3 Months Ended

Mar. 31, 2021

Environmental Remediation Obligations [Abstract]

Schedule of current and non-current environmental remediation reserves by categories of sites

The following table presents Occidental’s current and non-current environmental remediation liabilities as of March 31, 2021. The current portion, $123 million, is included in accrued liabilities and the non-current portion, $1.0 billion, in deferred credits and other liabilities-environmental remediation liabilities.

Occidental’s environmental remediation sites are grouped into four categories: sites listed or proposed for listing by the U.S. Environmental Protection Agency (EPA) on the CERCLA National Priorities List (NPL) and three categories of non-NPL sites—third-party sites, Occidental-operated sites and closed or non-operated Occidental sites.

millions, except number of sites	Number of Sites	Remediation Balance
NPL sites	34	$	445
Third-party sites	69	303
Occidental-operated sites	17	141
Closed or non-operated Occidental sites	48	263
Total	168	$	1,152