butylated hydroxyanisole
San Francisco City Water System
Butylated hydroxyanisole, or BHA, is used as a food preservative. The chemical is considered a possible human carcinogen and classified by the European Union as an endocrine disruptor.
23
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 | N/A | 0 | 0 | N/A |
| 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 | ND | 22 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-22 | 201801230577 | ND |
| 2018-01-22 | 201801230575 | ND |
| 2018-01-22 | 201801230583 | ND |
| 2018-01-22 | 201801230763 | ND |
| 2018-01-22 | 201801230588 | ND |
| 2018-01-22 | 201801230754 | ND |
| 2018-04-23 | 201804240634 | ND |
| 2018-04-23 | 201804240635 | ND |
| 2018-04-23 | 201804240646 | ND |
| 2018-04-23 | 201804240633 | ND |
| 2018-06-07 | 201806080877 | ND |
| 2018-06-07 | 201806080878 | ND |
| 2018-07-23 | 201807240392 | ND |
| 2018-07-23 | 201807240390 | ND |
| 2018-08-30 | 201808310449 | ND |
| 2018-08-30 | 201808310471 | ND |
| 2018-09-19 | 201809200530 | ND |
| 2018-09-19 | 201809200540 | ND |
| 2018-11-26 | 201811270386 | ND |
| 2018-11-26 | 201811270385 | ND |
| 2018-12-11 | 201812120358 | ND |
| 2018-12-11 | 201812120277 | ND |
| 2019-01-15 | 201901170151 | ND |