City Council Public Hearing August 16, 2010 PUBLIC HEALTH GOALS City Council Public Hearing August 16, 2010

Public Health Goals (PHGs) WHAT ARE PHGs? Set by the California Office of Environmental Health Hazard Assessment (OEHHA) which is part of California EPA Based solely on public health risk considerations Detection capability, availability of treatment technology, benefits and costs are not considered Are not enforceable and not required to be met

PHG vs. Consumer Confidence Report (CCR) CCR Report Required annually Drinking water regulatory standards Includes information on source water Levels of any detected contaminants PWP’s compliance with drinking water regulations PHG Report Required every 3 years Level of a contaminant in drinking water, that does not pose a health risk if consumed for a lifetime. Contaminants present, but at levels below the drinking water standards (MCLs) Technology for removal, if any, and associated cost

Constituents Detected That Have Exceeded a PHG or a MCLG The constituents listed below have exceeded a PHG or a MCLG at one or more of the City’s sources. Trichloroethylene (TCE) Perchlorate Tetrachloroethylene (PCE) Lead/Copper Total Coliform Bacteria Arsenic Nitrate Uranium Fluoride Gross Alpha The water from these sources have been blended with other sources of water to meet all applicable water quality standards before being delivered to customers.

Acronyms PHG Public Health Goal. The level of a contaminant in drinking water below which there is no known or expected risk to health. Set by Cal-EPA. MCL Maximum Contaminant Level. The highest level of a contaminant that is allowed in drinking water. Primary MCLs are set as close to the PHGs (or MCLGs) as is economically and technologically feasible. MCLG Maximum Contaminant Level Goal - The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by the U.S. Environmental Protection Agency.

Conclusion The drinking water quality of the City of Pasadena meets all State and Federal drinking water standards set to protect public health. To further reduce the contaminant levels to meet the PHGs would require additional costly treatment processes. No action is proposed.

Constituents Detected That Have Exceeded a PHG or a MCLG Chemical PHG / MCLG (mg/L) MCL Range of Detections (mg/L) Trichloroethylene (TCE) 0.0017 0.005 0.0048 - 0.00923 Tetrachloroethylene (PCE) 0.00006 0.0005 - 0.005 Total Coliform Bacteria 0 MCLG 5% 0.75-1.5% Nitrate 45 45.5 ** Fluoride 1 2 0.42- 1.57 Perchlorate 0.006 0.006-0.0132 Lead / Copper* 0.0002 / 0.3 * 0.015 / 1.3 < 0.005/ 0.170 Arsenic 0.000004 0.01 0.001-0.002 Uranium 0.43 picoCuries/L 20 2.0 -17.0 Gross Alpha 15pci/L 3-16pci/L ** * 90th percentile of the samples collected cannot exceed the action level. ** Copelin Well