[varelse]

We found out the hard way that you can have manganese sediment in your drinking water to the point that the water comes out brown and full of sand and it doesn't violate EPA regulations just their recommendations as it clogs all your plumbing fixtures and sets you up for a huge repair bill. And the water company is absolutely not responsible in any way.

[guru4consulting]

Long ago, I had worked at EPA OPP division, the office of pesticide protection. In general, the regulations are not enough. I won't be able to share all the details, but I can say that these kinds of regulations sometime help the pesticide companies because they can legally do the illegal/unethical things.

[TedDoesntTalk]

Another example: EPA allows up to 15 µg/L of lead in drinking water. But lower levels are known to be dangerous:

“Researchers now know, blood lead levels in children as low as five micrograms per deciliter — the Centers for Disease Control's "level of concern" — can lead to IQ deficits and increases in behavior problems like ADHD and conduct disorder.

In adults, low-level exposure of 10 micrograms per deciliter can cause high blood pressure and kidney problems.”

And the CDC has said that no level of lead in blood is safe.

https://www.npr.org/sections/thetwo-way/2016/08/13/489825051...

https://ntp.niehs.nih.gov/ntp/ohat/lead/final/monographhealt...

[nitrogen]

You're comparing micrograms per liter in water to micrograms per deciliter in blood. Those are very different things.

[pvaldes]

bioaccumulation still can happen