Naphthalene
Nob Hill Water Association
Naphthalene is a polycyclic aromatic hydrocarbon, or PAH, released from combustion of fossil fuels and waste incinerators, and also used as a moth repellent. PAHs increase the risk of cancer; damage the immune, nervous and reproductive systems; and can harm developing fetuses.
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 |
|---|---|---|---|---|
| 2018 | ND | 1 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-06-06 | ND | |
| 2021-07-07 | 4146288 | ND |
| 2021-07-07 | 4146287 | ND |
| 2021-07-07 | 4144639 | ND |
| 2022-03-21 | 4258505 | ND |
| 2022-06-06 | 4298839 | ND |
| 2022-08-15 | 4327034 | ND |
| 2022-09-14 | 4344892 | ND |
| 2022-10-11 | 4356385 | ND |