Originally Posted By: frozenbuttFew years ago there was a trailer court for mobile homes around here that closed down because of high arsenic levels. They either had to spend hunders of thousands of dollars to put a filtration system in or close the place. So they closed. Funny thing is the levels never went up in the water in the 40 years it was there, but the EPA's allowable PPM for arsenic levels went down and all of a sudden it was a problem, so now it is plowed up for growing corn. Also funny is that the farms that are all around that old place are still using their wells.
Absolutely FB! That was the problem with most of the contaminants developed under the Safe Drinking Water Act. Technology developed to the point they could find traces so small that it would be impossible for it to ever affect you, however there was no "needs assessment" required in the original draft of the Safe Drinking Water Act legislation. The EPA was told you will determine XX number of contaminants this year, this many more 3 years down the road, this many more 5 years down the road, and XX number per year, every year thereafter.
In developing a Maximum Contaminant Level (MCL), the contaminant was fed to lab animals to the point that they find carcinogenic (cancer causing) or lethal dosage. That level of ingestion is then fed into a computer model that translates it into human dosage levels. Then taking into account those with weakened immune systems, (immune system disorders, elderly, infants, pregnant women, etc.), wherein the contaminant may have a greater impact, a multiplication factor is introduced dependent upon toxicity of the contaminant, and the MCL is then calculated to determine how much may be necessary to negatively impact 1 person in 1,000,000. So your MCL is essentially a computer generated model, of a computer generated model, of a dead lab rat, that MIGHT cause ill effects in one person in one million.
As stated above on the Arsenic in well water, there are 90 - 95 year old people in southeast North Dakota that have drank from the same wells all their lives, and never experienced a problem from arsenic in well water. Not one single health problem ever reported in that area associated with arsenic ingestion. No indication of any greater carcinogenic effect in that area than any other. Yet the EPA issued a $10,000,000 check out of the SDWA Emergency Fund, to save everyone's lives.
Same crap with the Lead/Copper Rule... There are people out there that have drank from the same water pipes all of their lives, and never had a problem; and lead accumulates in your system over time, it is not dissipated. Furthermore, there is not 1 documented case of lead poisoning as a result of lead in drinking water, in the US, ever. Not one! On top of that, Copper is an essential element in the Human Body, it is beneficial. However, it was used as an indicator that lead "could" leach from the water pipes in the homes, and if more than 1 copper sample exceeded prescribed levels, the system had to treat for lead, even if no lead results exceeded the MCL, when the lead/copper found was in the user's home, not in the system itself.
Prescribed method of treatment was to inject Zinc-Ortho-Phosphate into the water, to coat the inside of the water pipes, and prevent the water from leaching the lead and/or copper from the line. Zinc is likewise an essential element, necessary to the body. However, Ortho-Phosphate is essentially a fertilizer, and it promotes bacterial growth, which in turn places additional demand on chlorine, lowering your disinfectant residual on far reaches of large systems. With certain waters/treatment methods, it can also cause disinfectant by-products called chloramines, which are also carcinogenic. So treating for one carcinogen led to development of another.
And, that's all on top of the fact that you're injecting a known poison into the water to treat for bacterial growth.