1,3-Butadiene
Norwalk Water Department
18
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 | 18 | 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 |
|---|---|---|
| 2013-01-31 | 440-36867-5 | ND |
| 2013-01-31 | 440-36867-7 | ND |
| 2013-01-31 | 440-36867-1 | ND |
| 2013-01-31 | 440-36867-3 | ND |
| 2013-04-04 | 440-42854-1 | ND |
| 2013-04-04 | 440-42854-3 | ND |
| 2013-04-30 | 440-45114-3 | ND |
| 2013-04-30 | 440-45114-1 | ND |
| 2013-04-30 | 440-45114-5 | ND |
| 2013-07-29 | 2869357 | ND |
| 2013-07-29 | 2869366 | ND |
| 2013-07-29 | 2869301 | ND |
| 2013-07-29 | 2869312 | ND |
| 2013-07-29 | 2869348 | ND |
| 2013-07-29 | 2869329 | ND |
| 2013-10-29 | 2922288 | ND |
| 2013-10-29 | 2922268 | ND |
| 2013-10-29 | 2922277 | ND |