Asbestos
Montara Water and Sanitary District
Asbestos is a mineral fiber introduced into water by the dissolution of asbestos-containing minerals and from decay of asbestos cement in water mains. Asbestos causes cancer when ingested or inhaled.
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 2 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 7 | 0 | ND |
MFL = million fibers per liter
State and national drinking water standards and health guidelines
EPA Maximum Contaminant
Level (MCL) 7 MFL
The legal limit for asbestos, established in 1991, was based on toxicity studies in laboratory animals conducted in the 1980s.
MFL = million fibers per liter
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2015-10-19 | 1620-031-1050 | ND |
| 2015-10-19 | 1620-032-1015 | ND |
| 2019-02-12 | 2283-003-1055 | ND |
| 2019-02-12 | 2283-014-1100 | ND |
| 2019-02-12 | 2283-015-0935 | ND |
| 2019-02-19 | 2283-010-1045 | ND |
| 2019-03-11 | 2283-001-1450 | ND |
| 2019-03-11 | 2283-008-1500 | ND |
| 2019-03-11 | 2283-012-1440 | ND |