我们这里的供水管道上世纪20,30年代的,放出来的水

来源: 2018-07-16 19:41:44 [] [旧帖] [给我悄悄话] 本文已被阅读: 次 (3371 bytes)
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回答: 纽约市仍延用破损严重地铁设备luxh0092018-07-16 19:36:47

都有味道,下雨的时候,电视有报道,水都浑浊,急需重建改造

NBC 的报道: 样本测试达标不超过10%

https://www.nbcnews.com/news/us-news/lead-your-water-are-federal-tests-missing-poison-pipes-n621736

Colorful 'shotgun' homes line of the streets of the Marigny, one of New Orleans' oldest neighborhoods. Here, NBC News found lead levels as high as 121 parts per billion in one homeowner's kitchen tap.

NBC News had a lab test the tap water in two dozen homes in New Orleans, a 300-year-old city with aging infrastructure and many lead pipes. The results, including Bourgeois’, revealed that harmful levels of lead may be much more prevalent in the city than tests currently prescribed by the Environmental Protection Agency show.

Experts said the NBC News investigation bolstered what scientists, including those at the EPA, have known for years — federally mandated tests used across the country to ensure water systems are safe may significantly underestimate lead levels in drinking water. By some estimates, up to 90 million Americans could be drinking from water systems that, if tested more rigorously, would not pass federal muster.

“The flaws in our sampling program have created a false sense of confidence both with the utilities, and the EPA, and consumers in this country that lead in water is a problem of the past,” said Dr. Marc Edwards, the Virginia Tech researcher who helped expose widespread lead contamination in the water in Flint, Michigan. “This is a problem of the present.”

The disaster in Flint brought national attention to lead in water just as the EPA finalizes new regulations, due out in 2017. But it’s unclear if the revisions will include more rigorous testing of drinking water.

New Orleans, which has among the highest blood lead levels of children in the state, is a case in point.

Seven of the 24 homes tested by NBC News, or nearly 30 percent, had at least one sample that exceeded 10 parts per billion, the maximum acceptable level set by the World Health Organization. Three of those seven homes tested over 15 ppb, the point at which the EPA says that action must be taken.

 

The tests indicate lead may be more common than shown in the city’s tests. In 2013, when the New Orleans water board conducted its last round of federally-mandated lead testing, only one of the 53 homes tested exceeded the EPA threshold. Under EPA guidelines, no more than 10 percent of all samples can exceed the threshold. New Orleans passed the monitoring with flying colors.

所有跟帖: 

什么地方?纽约市的水质超过一般瓶装水的质量,可以直接放心饮用。 -BeyondWind- 给 BeyondWind 发送悄悄话 BeyondWind 的个人群组 (0 bytes) () 07/16/2018 postreply 19:46:24

全国95% 的 学校的自来水没有达标,这是新闻中去年公布的调查报告。纽约是其中之一。 -笑薇.- 给 笑薇. 发送悄悄话 笑薇. 的博客首页 笑薇. 的个人群组 (0 bytes) () 07/16/2018 postreply 19:53:31

有出处么?我的信息来自于Certified LAB, 几年前的一手资料。 -BeyondWind- 给 BeyondWind 发送悄悄话 BeyondWind 的个人群组 (0 bytes) () 07/16/2018 postreply 20:13:31

刚刚查了一下,有少数铅超标问题来自于老旧管路的二次污染。反正实验员是喝自来水的。 -BeyondWind- 给 BeyondWind 发送悄悄话 BeyondWind 的个人群组 (0 bytes) () 07/16/2018 postreply 20:21:19

有些地方检验结果很好,有些不行,不过应该是最近几年刚换的管道。因为地表水 -笑薇.- 给 笑薇. 发送悄悄话 笑薇. 的博客首页 笑薇. 的个人群组 (158 bytes) () 07/16/2018 postreply 20:25:45

你这个想当然了,纽约水是上州水库来的,质量非常好,不用过滤,主要是紫外线杀菌,非常安全。 -BeyondWind- 给 BeyondWind 发送悄悄话 BeyondWind 的个人群组 (0 bytes) () 07/16/2018 postreply 20:34:28

注意,不是所有的用的是同一个水源。也不是我的想当然,你想当然的就说不出这样的话了。 -笑薇.- 给 笑薇. 发送悄悄话 笑薇. 的博客首页 笑薇. 的个人群组 (0 bytes) () 07/16/2018 postreply 20:38:00

请看NYCDEP的报告吧,http://www.nyc.gov/html/dep/pdf/wsstate17.pdf  -BeyondWind- 给 BeyondWind 发送悄悄话 BeyondWind 的个人群组 (0 bytes) () 07/16/2018 postreply 20:44:27

前些天一批网民在这里猛夸 连川普都承认的老旧的美国基础设施 -luxh009- 给 luxh009 发送悄悄话 luxh009 的个人群组 (0 bytes) () 07/16/2018 postreply 19:46:26

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