Wastewater from Colorado mine flows toward New Mexico, Utah

1People kayak in the Animas River near Durango, Colo., Thursday, Aug. 6, 2015, in water colored from a mine waste spill.
2The U.S. Environmental Protection Agency said that a cleanup team was working with heavy equipment Wednesday to secure an entrance to the Gold King Mine.
3Workers instead released an estimated 1 million gallons of mine waste into Cement Creek, which flows into the Animas River.
4Dan Bender, with the La Plata County Sheriff's Office, takes a water sample from the Animas River near Durango, Colo., Thursday, Aug. 6, 2015.
5Residents sit on the edge of the river while waiting a glimpse of the mine wastewater that spilled into the river earlier in the day on Aug. 6, 2015 along Animas River in Durango, Colo.
6Over a million gallons of mine wastewater has made it's way into the Animas River closing the river and put the city of Durango on alert.
7DENVER (AP) - An eerie yellow sludge that poured out of a shuttered gold mine and into a southwestern Colorado river was inching its way downstream toward New Mexico and Utah.
8Federal officials said Friday the spill contains heavy metals including lead and arsenic, but it was too early to know whether they posed a health risk.
9No health hazard has been detected, but the tests were still being analyzed, said Joan Card, an adviser to Environmental Protection Agency Regional Director Shaun McGrath.
10The spill also contained cadmium, aluminum, copper and calcium, the EPA said.
11The concentrations were not yet known.
12An EPA-supervised cleanup crew accidentally unleashed 1 million gallons of the wastewater from the Gold King Mine on Wednesday, and it flowed down Cement Creek and into the scenic Animas River, which is popular with boaters and anglers.
13The EPA warned people to stay out of the river and to keep domestic animals from drinking from it.
14Local officials declared stretches of the river off-limits in Colorado and New Mexico.
15At least two of the heavy metals can be lethal for humans in long-term exposure.
16Arsenic at high levels can cause blindness, paralysis and cancer.
17Lead poisoning can create muscle and vision problems for adults, harm development in fetuses and lead to kidney disease, developmental problems and sometimes death in children, the agency said.
18Water samples were also tested in New Mexico, but no results had been released.
19The Animas flows into the San Juan River in New Mexico, and the San Juan flows into Utah, where in joins the Colorado River in Lake Powell.
20Officials said the contamination would likely settle into sediment in Lake Powell.
21Glen Canyon National Recreation Area officials said visitors will be warned starting Monday to avoid drinking, swimming or boating on affected stretches of the lake and river until further notice.
22New Mexico officials were angry they were not told of the spill until Thursday, nearly a day after it occurred.
23"New Mexico deserves better," state Environment Secretary Ryan Flynn said.
24McGrath apologized for the EPA's response and for previously sounding cavalier about the concerns for public health and the environment.
25"Our initial response to it was not appropriate in that we did not understand the full extent of what we were looking at here," he said.
26At least seven water utilities shut down their intake valves ahead of the plume to keep it out of their systems, and no drinking-water contamination was reported.
27Farmers also closed the gates on their irrigation ditches to protect their crops.
28Water was still spilling from the mine on Friday, but officials didn't know how fast.
29Crews were building containment ponds to catch it.
30Card said the EPA has no way to get the discolored water out of the river and that it will eventually dissipate.
31It wasn't clear when that will happen.
32Officials were releasing extra water from at least one reservoir to help dilute the pollution.
33Few details have been released about the spill, except that the cleanup crew of EPA employees and contractors accidentally breached a debris dam that had formed inside the mine.
34The crew was trying to enter the mine to pump out and treat the water, EPA spokeswoman Lisa McClain-Vanderpool said.
35The mine has been inactive since 1923.