Other Non Metal Contaminants
Arsenic
Is a "non-metal" element. It is in the nitrogen family along with phosphorous, antimony and bismuth. It occurs naturally in soil (2-3ppm) and in shale (13ppm) & coal ash (500ppm). It is extremely toxic. In the human body it combines with certain enymes and interferes with metabolism. Is a suspected carcinogen. It is used for rodenticides, insecticides and weed killers. Thousands of tons of arsenic are used in agriculture. In water it may be present as an insoluble colloid (removed by coagulation), as an organic compound (removable by GAC), as a soluble arsenite As+3 and As+5 (RO removes 90% As+5, 50% As+3. Chlorination will cause oxygenation, which will facilitate removal by RO). Make sure you know what type of arsenic contamination you have before you treat it.1996 amendments to 'The Clean Water Act' reduced the EPA MCL from 50ppm to 10ppm.
There is an NTL test for Arsenic and Trihalomethanes.
Radon
There was a News Release 10/26/95 by CALPIRG and NRDC that there was ARSENIC found in the Concord water supply, exposing 225,000 people and in Oakland Water supplies exposing , and Radon in the Novato area, exposing 55,000 residents to radon. It also talked about Trihalomethanes being too high in city water.
The radon claim in the article is misinformation; NMWD-North Marin Water District has two different water systems; Novato and Pt. Reyes. They tested Pt. Reyes which is on ground water (indicator for radon due to the type of bedrock), and found 300 picocures per litre. This was voluntary on their part-above and beyond the call of duty to test at all, since it is not required by the EPA or Feds to monitor it. It is also a naturally occuring phenomenon/gas. 300picocures is not of much concern-BL concurs. Mainly gas in the air, enclosed basements etc. that is a concern.
Radon in drinking water is not a common concern. Bath and shower is more of a concern.
Radon is carcinogenic when inhaled. Radon is the heaviest of the "Noble" gases, naturally occurring in some sorts of bedrock on ground water supplies. short lived, radioactive produced by the decay of uranium/radium and is soluble in water (?? BL translate) - is carcinogenic.
Generically speaking-Carbon filtration addresses Radon. None of our systems are NSF certified for radon reduction.
Cuno says that they do not make a recommendation for radon removal and will not "stand behind the AP600" or any other product. However generically speaking .... carbon gets radon.... and the AP600 is a carbon filter....have the customer draw their own conclusions. Radon is not listed as a health risk by the EPA, so legally, we can say that the AP 600 reduces radon. However, tread lightly. There is an environmental/ legal concern re: the disposal of filters that have been used for radon removal because of concentration of radioctivity/radon on the filter. Tread lightly!! More News to Come. Radon can also be reduced by aeration.
Testing should not be necessary because we can get the figures off the CALPIRG report which is applicable for the entire water supply-North Marin Water District =Novato.
NTL also does not test for radon. HT TFC systems are NSF certified for arsenic (TFC min rjctn 98%, CTA min rjctn 93%).
Arsenic
Is a "non-metal" element. It is in the nitrogen family along with phosphorous, antimony and bismuth. It occurs naturally in soil (2-3ppm) and in shale (13ppm) & coal ash (500ppm). It is extremely toxic. In the human body it combines with certain enymes and interferes with metabolism. Is a suspected carcinogen. It is used for rodenticides, insecticides and weed killers. Thousands of tons of arsenic are used in agriculture. In water it may be present as an insoluble colloid (removed by coagulation), as an organic compound (removable by GAC), as a soluble arsenite As+3 and As+5 (RO removes 90% As+5, 50% As+3. Chlorination will cause oxygenation, which will facilitate removal by RO). Make sure you know what type of arsenic contamination you have before you treat it.1996 amendments to 'The Clean Water Act' reduced the EPA MCL from 50ppm to 10ppm.
There is an NTL test for Arsenic and Trihalomethanes.
Radon
There was a News Release 10/26/95 by CALPIRG and NRDC that there was ARSENIC found in the Concord water supply, exposing 225,000 people and in Oakland Water supplies exposing , and Radon in the Novato area, exposing 55,000 residents to radon. It also talked about Trihalomethanes being too high in city water.
The radon claim in the article is misinformation; NMWD-North Marin Water District has two different water systems; Novato and Pt. Reyes. They tested Pt. Reyes which is on ground water (indicator for radon due to the type of bedrock), and found 300 picocures per litre. This was voluntary on their part-above and beyond the call of duty to test at all, since it is not required by the EPA or Feds to monitor it. It is also a naturally occuring phenomenon/gas. 300picocures is not of much concern-BL concurs. Mainly gas in the air, enclosed basements etc. that is a concern.
Radon in drinking water is not a common concern. Bath and shower is more of a concern.
Radon is carcinogenic when inhaled. Radon is the heaviest of the "Noble" gases, naturally occurring in some sorts of bedrock on ground water supplies. short lived, radioactive produced by the decay of uranium/radium and is soluble in water (?? BL translate) - is carcinogenic.
Generically speaking-Carbon filtration addresses Radon. None of our systems are NSF certified for radon reduction.
Cuno says that they do not make a recommendation for radon removal and will not "stand behind the AP600" or any other product. However generically speaking .... carbon gets radon.... and the AP600 is a carbon filter....have the customer draw their own conclusions. Radon is not listed as a health risk by the EPA, so legally, we can say that the AP 600 reduces radon. However, tread lightly. There is an environmental/ legal concern re: the disposal of filters that have been used for radon removal because of concentration of radioctivity/radon on the filter. Tread lightly!! More News to Come. Radon can also be reduced by aeration.
Testing should not be necessary because we can get the figures off the CALPIRG report which is applicable for the entire water supply-North Marin Water District =Novato.
NTL also does not test for radon. HT TFC systems are NSF certified for arsenic (TFC min rjctn 98%, CTA min rjctn 93%).
