1,3-Butadiene
Contra Costa Water District
8
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | ND | 8 | 0 | ND |
| 2014 | N/A | 0 | 0 | N/A |
| 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
| Date | Lab ID | Result |
|---|---|---|
| 2013-03-19 | 201303200300AM | ND |
| 2013-03-20 | 201303210135AM | ND |
| 2013-06-11 | 201306120211AM | ND |
| 2013-06-12 | 201306130200AM | ND |
| 2013-09-10 | 201309110439AM | ND |
| 2013-09-11 | 201309120475AM | ND |
| 2013-12-10 | 201312120835AM | ND |
| 2013-12-11 | 201312120837AM | ND |