Laserfiche WebLink
concentrations of each contaminant in drinking water supplied by the City in calendar <br />years 2016 through 2018. <br />4.0 Numerical Public Health Risks <br />Section 116470(b)(2) of the Health and Safety Code requires disclosure of the <br />numerical public health risk, determined by OEHHA, associated with the MCLs, Action <br />Levels, PHGs and MCLGs. Available numerical health risks developed by OEHHA for <br />the contaminants identified above are shown on the accompany chart. Only numerical <br />risks associated with cancer -causing chemicals have been quantified by OEHHA. <br />Arsenic — OEHHA has determined the health risk associated with the PHG is 1 excess <br />case of cancer in a million people. USEPA has determined the risk associated with the <br />MCL is 2.5 excess cases of cancer in 1,000 people exposed over a 70-year lifetime. <br />Bromate — OEHHA has determined the theoretical health risk associated with the PHG <br />is 1 excess case of cancer in a million people. USEPA has determined the risk <br />associated with the MCL is 1 excess cases of cancer in 10,000 people exposed over a <br />70-year lifetime. <br />Coliform Bacteria, Total — OEHHA has not established a PHG. USEPA has <br />established an MCLG of 0. <br />Gross Alpha — OEHHA has not established a PHG. USEPA has established an MCLG <br />of 0 and the risk associated with the MCL is 1 excess case of cancer in 1,000 people <br />over a lifetime exposure. <br />Gross Beta — OEHHA has not established a PHG. USEPA has established an MCLG <br />of 0 and the risk associated with the MCL is 2 excess cases of cancer in 1,000 people <br />over a lifetime exposure. <br />City of Santa Ana 4 2019 PHGs Report <br />75C-7 <br />