Ray-Right! I think blood lead half life is about 30 days. The good thing about the Flint child CDC data is that it represented thousands of samples in each period, before, during and after the water changes. By the way, I checked the Detroit data from 2013 (where Flint did and now gets its water). The Detroit blood leads were higher than Flint's in 2013 and also during the Flint problem. Detroit had about 8% above 5 ug/dl whereas Flint's were around 3% in 2013. I think a lot of both are coming from old housing with old lead paint. Pennsylvania also reported a lot of cities with elevated blood leads which they attribute mostly to lead paint. The other source in water that nobody mentions is adsorption and release from old galvanized iron pipe, again old housing that has not been rehabed.
Published by Joseph Cotruvo, President at Joseph Cotruvo & Associates, Water , Environment and Public Health
Ray-Right! I think blood lead half life is about 30 days. The good thing about the Flint child CDC data is that it represented thousands of samples in each period, before, during and after the water changes. By the way, I checked the Detroit data from 2013 (where Flint did and now gets its water). The Detroit blood leads were higher than Flint's in 2013 and also during the Flint problem. Detroit had about 8% above 5 ug/dl whereas Flint's were around 3% in 2013. I think a lot of both are coming from old housing with old lead paint. Pennsylvania also reported a lot of cities with elevated blood leads which they attribute mostly to lead paint. The other source in water that nobody mentions is adsorption and release from old galvanized iron pipe, again old housing that has not been rehabed.