Naphthalene
City of San Juan
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.
27
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 | ND | 4 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 7 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-01-29 | AC40685 | ND |
| 2014-01-29 | AC40682 | ND |
| 2014-07-23 | AC60704 | ND |
| 2014-07-23 | AC60680 | ND |
| 2015-01-21 | AC77145 | ND |
| 2015-01-21 | AC77150 | ND |
| 2015-07-14 | AC99429 | ND |
| 2015-07-14 | AC99405 | ND |
| 2016-01-29 | AD21256 | ND |
| 2016-04-29 | AD34911 | ND |
| 2016-07-14 | AD44283 | ND |
| 2016-07-14 | AD44293 | ND |
| 2017-01-10 | AD64120 | ND |
| 2017-04-21 | AD80791 | ND |
| 2017-05-30 | AD86004 | ND |
| 2017-07-14 | AD89565 | ND |
| 2017-07-14 | AD89528 | ND |
| 2017-07-14 | AD89530 | ND |
| 2017-10-31 | AE03057 | ND |
| 2018-01-24 | AE10302 | ND |
| 2018-04-11 | AE22122 | ND |
| 2018-08-16 | AE37385 | ND |
| 2018-08-16 | AE37373 | ND |
| 2019-02-26 | AE56114 | ND |
| 2019-05-21 | AE67485 | ND |
| 2019-09-04 | AE82071 | ND |
| 2019-09-04 | AE82075 | ND |