川がオレンジに染まる。鉱山廃水が流出【動画・画像】

アメリカ・コロラド州で、環境保護局(EPA)の職員が、廃鉱になった鉱山の廃水を流出させる事故が起き、川がオレンジ色に染まった。
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アメリカ・コロラド州で8月5日、環境保護局(EPA)の職員が、廃鉱になった鉱山の廃水約300万ガロン(1100万リットル)を誤って川に流出させる事故が起き、川がオレンジ色に染まった。廃水には有毒物質が含まれており、EPAは川に近付かないよう住民に呼びかけている。10日、CNNなどが報じた。

ニューヨーク・タイムズによると、EPA職員はこの日、廃鉱になったゴールドキング鉱山の貯水場に貯めてあった汚水をくみ出す作業を行う予定だったが、誤って坑道に穴を開けるミスを犯し、汚水が流出。近くを流れる小川に流れ込んだ。小川はアニマス川に合流しており、下流のニューメキシコ州などに大規模な汚染が広がった。

廃水には高濃度のヒ素や銅、カドミウムといった重金属が含まれているとされ、環境被害への懸念が高まっている。一方でコロラド州の衛生当局者は11日、初期検査の結果、今回の鉱山廃水流出では健康リスクはみられない、と述べた

アニマス川の鉱山廃水
8月9日の川(01 of10)
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Description:Sampling point GKMSW07\nDate Taken:8/9/2015\n (credit:EPA)
8月5日、重機で作業中(02 of10)
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Description:Cleaning out excavated material, small leak.\nDate Taken:8/5/2015
8月5日、廃水が流れだす(03 of10)
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Description:Hole starting to give way to flow.\nDate Taken:8/5/2015 (credit:EPA)
8月5日のゴールドキング鉱山、廃水がどんどん流れる(04 of10)
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(credit:EPA)
Minewater Spill Creeps Its Way Into Animas River(05 of10)
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DURANGO, CO - AUGUST 7: People get their first look at the Gold King Mine wastewater that flowed into the Animas River August 7, 2015 at the 32nd Bridge. Over 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. (Photo By Brent Lewis/The Denver Post via Getty Images) (credit:Brent Lewis via Getty Images)
Minewater Spill Creeps Its Way Into Animas River(06 of10)
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SILVERTON, CO - AUGUST 7: Water flows into pits of mine wastewater below the Gold King Mine on August 7, 2015 along Animas River. Over 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. (Photo By Brent Lewis/The Denver Post via Getty Images) (credit:Brent Lewis via Getty Images)
Minewater Spill Creeps Its Way Into Animas River(07 of10)
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DURANGO, CO - AUGUST 7: The Animas River flows through the center of Durango on August 7, 2015 along Animas River. Over 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. (Photo By Brent Lewis/The Denver Post via Getty Images) (credit:Brent Lewis via Getty Images)
Minewater Spill Creeps Its Way Into Animas River(08 of10)
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DURANGO, CO - AUGUST 6: Residents sit on the edge of the river while waiting a glimpse of the mine wastewater that spilled into the river earlier in the day August 6, 2015 along Animas River. Over 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. (Photo By Brent Lewis/The Denver Post via Getty Images) (credit:Brent Lewis via Getty Images)
Minewater Spill Creeps Its Way Into Animas River(09 of10)
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SILVERTON, CO - AUGUST 7: Mine wastewater empties into pits below the mine August 7, 2015 along Animas River. Over 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. (Photo By Brent Lewis/The Denver Post via Getty Images) (credit:Brent Lewis via Getty Images)
8月9日(10 of10)
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Description:New treatment ponds before discharge to Cement Creek\nDate Taken:8/9/2015 (credit:EPA)