1,3-Butadiene
California Water Service - San Mateo
NOTE: California Water Service - San Mateo purchases water from San Francisco Regional Water System which is required to test for 1,3-butadiene. Sample information shown below was taken by San Francisco Regional Water System.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 4 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.0103 ppb
The EWG Health Guideline of 0.0103 ppb for 1,3-butadiene was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against cancer.
ppb = parts per billion
All test results
NOTE: California Water Service - San Mateo purchases water from San Francisco Regional Water System which is required to test for 1,3-butadiene. Sample information shown below was taken by San Francisco Regional Water System.
Date | Lab ID | Result |
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