17-beta-Estradiol
San Francisco City Water System
Beta-estradiol is one of the 3 types of estrogen made by the human body. Sex hormones get into water downstream from livestock and pharmaceutical production, or incomplete removal in waste water treatment. There are no standards to gauge how risky additional hormones are for human health.
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 |
ppt = parts per trillion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2013-01-31 | 201302010153SS | ND |
| 2013-02-20 | 201302220337SS | ND |
| 2013-04-29 | 201304300195SS | ND |
| 2013-06-06 | 201306070190SS | ND |
| 2013-07-30 | 201307310290SS | ND |
| 2013-08-12 | 201308130156SS | ND |
| 2013-10-07 | 201310080350SS | ND |
| 2013-10-10 | 201310110406SS | ND |