The Site is defined by two contaminant plumes, the Newmark plume and the Muscoy plume. EPA is addressing site cleanup in two phases, including the containment and cleanup of the two contaminant plumes and addressing the source of the contamination.
| City | San Bernardino |
|---|---|
| County | San Bernardino County |
| State | California |
| Coordinates | 34.17181, -117.31310 |
Newmark Ground Water Contamination is a federal Superfund site in California. The Superfund program, created by Congress in 1980, addresses sites where hazardous substances have been released or threaten release into the environment. EPA scores potential sites using the Hazard Ranking System; those that score high enough are placed on the National Priorities List.
Current status: Cleanup underway. Active cleanup is underway, meaning EPA has approved a remediation plan and work is in progress. Cleanup timelines vary widely — some sites take decades depending on contamination depth, groundwater involvement, and funding availability.
EPA has identified 7 contaminants of concern at this site, including 1,1-dichloroethane, cis-1,2-dichloroethene, dichlorodifluoromethane. Contamination has been detected in groundwater.
If you live near this site and have health concerns, your state health department can provide site-specific guidance. EPA maintains a community involvement program for most NPL sites, and site documents — including the Record of Decision, five-year reviews, and public health assessments — are typically available through EPA's Superfund site profile.