Asbestos
City of Shavano Park
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.
10
Samples
2
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 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 5.12 MFL | 3 | 2 | ND - 14.19 MFL |
| 2022 | 5.92 MFL | 4 | 4 | 0.39 MFL - 20.69 MFL |
| 2023 | 0.63 MFL | 3 | 2 | ND - 1.33 MFL |
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 |
|---|---|---|
| 2021-02-23 | CAL21021499 | 14.19 MFL |
| 2021-03-16 | CAL21032454 | 1.18 MFL |
| 2021-12-20 | CAL211211256 | ND |
| 2022-03-09 | CAL22032147 | 1.60 MFL |
| 2022-04-28 | CAL22043975 | 0.99 MFL |
| 2022-09-27 | CAL22099863 | 0.39 MFL |
| 2022-10-27 | CAL221010823 | 20.69 MFL |
| 2023-06-22 | 3299350 | ND |
| 2023-08-24 | 3365050 | 0.57 MFL |
| 2023-10-16 | 3423168 | 1.33 MFL |