我們這裏的供水管道上世紀20，30年代的，放出來的水

來源: 嘴大吃八方於 2018-07-16 19:41:44 [檔案] [舊帖] [給我悄悄話] 本文已被閱讀：次 (3371 bytes)

本文內容已被 [ 嘴大吃八方 ] 在 2018-07-16 20:33:08 編輯過。如有問題，請報告版主或論壇管理刪除.

回答: 紐約市仍延用破損嚴重地鐵設備由 luxh009 於 2018-07-16 19:36:47

都有味道，下雨的時候，電視有報道，水都渾濁，急需重建改造

NBC 的報道：樣本測試達標不超過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.