Asbestos
St John Water District 1
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.
12
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 |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 0 | ND |
MFL = million fibers per liter
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2019-01-22 | 35483806001 | ND |
| 2019-01-22 | 35483806002 | ND |
| 2019-01-22 | 35483806001 | ND |
| 2019-01-22 | 35483806002 | ND |
| 2020-03-05 | 35536157001 | ND |
| 2020-03-05 | 35536157002 | ND |
| 2021-01-28 | 35608241001 | ND |
| 2021-01-28 | 35608241002 | ND |
| 2022-02-02 | 35695491001 | ND |
| 2022-02-02 | 35695491002 | ND |
| 2023-03-20 | 35788994001 | ND |
| 2023-03-20 | 35788994002 | ND |