Beryllium
San Francisco City Water System
Beryllium is a toxic metal that is both naturally occurring and released into the environment from industrial pollution and incineration. Beryllium can damage lungs, bones and the digestive system.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 1 | 0 | ND |
2017 | ND | 1 | 0 | ND |
2018 | ND | 17 | 0 | ND |
2019 | ND | 4 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 1 ppb
The EWG Health Guideline of 1 ppb for beryllium was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to the stomach and intestines.
EPA Maximum Contaminant
Level (MCL) 4 ppb
The legal limit for beryllium, established in 1992, was based on a toxicity study in laboratory animals published in 1970. This limit does not include any additional consideration of children’s health.
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2016-06-14 | 9553-001-0920 | ND |
2017-06-19 | 9553-001-1015 | ND |
2018-01-11 | 9553-007-1115 | ND |
2018-03-06 | 9553-008-0914 | ND |
2018-03-06 | 9553-004-1031 | ND |
2018-03-08 | 9553-006-0925 | ND |
2018-04-17 | 9553-007-1055 | ND |
2018-06-12 | 9553-004-1058 | ND |
2018-06-12 | 9553-006-1012 | ND |
2018-06-12 | 9553-008-0930 | ND |
2018-06-18 | 9553-001-1025 | ND |
2018-07-17 | 9553-007-0519 | ND |
2018-09-18 | 9553-004-0855 | ND |
2018-09-18 | 9553-008-1025 | ND |
2018-09-18 | 9553-006-0945 | ND |
2018-10-17 | 9553-007-0730 | ND |
2018-12-11 | 9553-008-1045 | ND |
2018-12-11 | 9553-006-0915 | ND |
2018-12-11 | 9553-004-0845 | ND |
2019-06-17 | 9553-007-0905 | ND |
2019-06-17 | 9553-006-1206 | ND |
2019-06-17 | 9553-004-0956 | ND |
2019-06-17 | 9553-008-1106 | ND |