Update (Aug. 16, 2015): New Mexico has resumed supplying public drinking water to cities from two stretches of rivers recently affected by the released toxic waste, Reuters reports.
Officials found tested water samples to be safe for drinking and recreation by state and federal standards. Contamination levels in fish are still unclear, however, and people are encouraged to release their catch until further notice.
Update (Aug. 15, 2015): 10 days after the wastewater spill that turned the river orange and saw large portions of the waterway closed to the public, the Animas River has been reopened for recreational use. In a statement released Friday, Colorado health officials said that analysis of sediment from the river shows contaminant levels are below a level that might pose a threat to human health. Despite giving the green light for recreational users to use the river as normal, the statement cautioned those who come in contact with river water or sediment to use the following four “prudent public health practices”:
- Don’t drink untreated water from the river
- Wash hands thoroughly with soap and water after contact with the sediment and surface water.
- Avoid contact in areas where there is visible discoloration in sediment or river water.
- Wash clothes after contact with sediments and surface water.
The statement warned agricultural water users that irrigation ditches that draw water from the river were still being flushed out and that they should wait until the process was complete before using the water to water crops.
New Mexico has also lifted a ban on drinking water from wells in the Animas River Valley downstream from the spill site.
The announcements followed the Environmental Protection Agency’s admission that it underestimated the volume of wastewater released in the accident. The agency’s revised estimate says that 3 million gallons of water were released. The initial estimate was about 1 million gallons.
Original post published on Aug. 8, 2015: The Environmental Protection Agency took responsibility Friday for a massive wastewater spill that contaminated a Colorado river Wednesday, and warned locals to avoid the polluted waters. According to a statement by the agency, an EPA cleanup team accidentally caused the spill while excavating the entrance to the Gold King Mine, an abandoned mine near Silverton in southwestern Colorado that had been leaking pollution.
While the crew was excavating, they breached a debris dam that had held the water inside the mine, allowing around 1 million gallons of toxic mustard-colored sludge to gush out of a mine tunnel and into the nearby Animas River, staining the river a bright yellow-orange color.
A yellow colored Animas River flows through Durango on Friday carrying toxic sludge from the Gold King Mine spill. pic.twitter.com/Dan3cOXmUR
— DurangoHerald (@DurangoHerald) August 8, 2015
Agency officials reported that samples of the water contained heavy metals, including lead, aluminum, arsenic, iron, copper, cadmium and calcium, in addition to sediment. With testing still underway and heavy metal concentrations currently unknown, officials said Friday that it was too soon to know whether the waste poses a health risk.
The orange Animas River at Bakers Bridge just north of Durango Colorado #orangeriver #durango #colorado #cnnireport #animasriver #drone #uav #dji A photo posted by Ian Lucier (@lli_photography) on
Long-term exposure to lead and arsenic can be lethal to humans, though the toxins’ effects depend on concentration.
No drinking water contamination had been reported as of Friday evening, according to The Associated Press, and at least seven water utilities shut down their intakes in anticipation of the advancing plume.
EPA has warned people along the Animas to avoid contact with the contaminated water, and to keep pets and livestock out of the river. Portions of the river, which is a popular recreational destination, have been closed off by law enforcement, and officials warned agricultural users to shut off water intakes along affected portions of the river.
Officials also released extra water from a reservoir in order to dilute the pollution.
As of Saturday morning, the river had begun to clear up near the spill site, but contaminated water has continued downstream into northern New Mexico.
Even after the water has cleared, heavy metals may remain on the river bottom and may linger on beaches.
Water continues to seep from the mine, though more slowly than during the initial spill Wednesday. EPA says it is constructing settling ponds to hold and treat the water that is still flowing from the mine, and that it expects construction to be completed tomorrow morning.