Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Emergency Response to Gold King Mine Release

Gold King Mine Data, August 27, 2015

Free viewers may be needed to access information linked on this page.

Data from Gold King Mine Response

EPA sediment samples collected August 15, 16, and 19, 2015 from the San Juan River and Lake Powell have been validated.

EPA has done a review of the data which included a comparison to screening levels for exposure during recreational use to determine if the metal concentrations are consistent with pre-event levels.

The metal concentrations of the samples were below soil / sediment recreational screening levels. Based on the sediment sampling results, sediment sample concentrations are trending toward pre-event conditions.

  • Open or download the data file:  r09_sediment_summary_table_08222015-reviewed (xlsx) (27.98 KB)
  • Open or download the data file:  r09_sediment_summary_table_08242015 (xlsx) (53.55 KB)

EPA has released additional water quality data from samples collected on August 15, 16, and 19, 2015 from the San Juan River and Lake Powell.

Each surface or bottom water sample was analyzed for 24 metals including arsenic, cadmium, lead and mercury.
 
Based on the sampling results, surface and bottom water concentrations in Lake Powell did not vary from pre-event conditions.  Based on sampling results, surface and bottom water concentrations have returned to pre-event conditions in the San Juan River.
 
The trend graphs on this website will be updated to include this data in the next few days.

  • Open or download the data file:  r09_surfacewater_summary_table_08242015 (xlsx) (122.76 KB)

Emergency Response to Gold King Mine Release

  • Frequent Questions
  • Press Releases and Updates
  • Gold King Mine Settlements
  • Learn How the Spill Happened
Contact Us About Emergency Response to the Gold King Mine Release
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on November 4, 2024
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.