1,3-Butadiene
Nob Hill Water Association
9
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 |
|---|---|---|---|---|
| 2014 | ND | 5 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 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 |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2014-04-21 | WA97-SE1-14-07099-17190 | ND |
| 2014-04-21 | WA97-SE1-14-07099-17188 | ND |
| 2014-04-21 | WA97-SE1-14-07099-17189 | ND |
| 2014-09-09 | WA97-SE1-14-17950-41046 | ND |
| 2014-09-09 | WA97-SE1-14-17950-41045 | ND |
| 2015-05-14 | WA97-SE2-15-09609-21837 | ND |
| 2015-05-14 | WA97-SE1-15-09609-21836 | ND |
| 2015-10-06 | WA97-SE2-15-21669-48260 | ND |
| 2015-10-06 | WA97-SE2-15-21669-48259 | ND |