Benzo[a]pyrene
Bayleaf Master
Benzo[a]pyrene is a polycyclic aromatic hydrocarbon, or PAH, released from combustion of fossil fuels and waste incinerators. PAHs increase the risk of cancer; damage the immune, nervous and reproductive systems; and can harm developing fetuses.
448
Samples
1
Samples exceeding legal limit (MCL)
1
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 94 | 0 | ND |
| 2015 | ND | 71 | 0 | ND |
| 2016 | 0.00359 ppb | 64 | 1 | ND - 0.230 ppb |
| 2017 | ND | 77 | 0 | ND |
| 2018 | ND | 74 | 0 | ND |
| 2019 | ND | 68 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.007 ppb
The EWG Health Guideline of 0.007 ppb for benzo[a]pyrene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.
EPA Maximum Contaminant
Level (MCL) 0.2 ppb
The legal limit for benzo[a]pyrene, established in 1992, was based on analytical detection limits at the time that the standard was set. This limit may not fully protect against the risk of cancer due to PAH exposure.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-01-07 | C316066-02 | ND |
| 2014-01-09 | C316059-01 | ND |
| 2014-01-09 | C316059-02 | ND |
| 2014-01-09 | C316070-01 | ND |
| 2014-01-09 | C316074-01 | ND |
| 2014-01-09 | C316077-01 | ND |
| 2014-01-09 | C400340-01RE1 | ND |
| 2014-01-13 | C316068-01 | ND |
| 2014-01-13 | C316068-02 | ND |
| 2014-01-16 | C316062-01RE1 | ND |
| 2014-01-20 | C316038-01 | ND |
| 2014-01-20 | C316038-02 | ND |
| 2014-01-23 | C316042-01 | ND |
| 2014-01-23 | C316022-01 | ND |
| 2014-01-23 | C316031-01 | ND |
| 2014-01-27 | C316045-01RE1 | ND |
| 2014-02-04 | C316014-01 | ND |
| 2014-02-24 | C316010-01 | ND |
| 2014-04-01 | C402988-01 | ND |
| 2014-04-01 | C403000-01 | ND |
| 2014-04-02 | C402971-01 | ND |
| 2014-04-02 | C402972-01 | ND |
| 2014-04-02 | C402976-01 | ND |
| 2014-04-02 | C402997-01 | ND |
| 2014-04-03 | C404035-01 | ND |
| 2014-04-07 | C403013-01 | ND |
| 2014-04-07 | C403013-02 | ND |
| 2014-04-08 | C402969-01RE2 | ND |
| 2014-04-08 | C402969-02RE1 | ND |
| 2014-04-09 | C403008-01RE1 | ND |
| 2014-04-09 | C403008-02RE1 | ND |
| 2014-04-09 | C403008-03RE2 | ND |
| 2014-04-09 | C403011-01 | ND |
| 2014-04-09 | C403011-02 | ND |
| 2014-04-10 | C402991-01RE2 | ND |
| 2014-04-10 | C402974-01RE1 | ND |
| 2014-04-11 | C402973-01RE1 | ND |
| 2014-04-11 | C402996-01RE2 | ND |
| 2014-04-11 | C402996-02RE2 | ND |
| 2014-04-11 | C402998-01RE2 | ND |
| 2014-04-14 | C403010-01 | ND |
| 2014-04-15 | C404042-01 | ND |
| 2014-04-16 | C404794-01RE1 | ND |
| 2014-04-16 | C403015-01 | ND |
| 2014-04-17 | C402979-01 | ND |
| 2014-04-22 | C404029-01 | ND |
| 2014-04-23 | C403016-01 | ND |
| 2014-04-24 | C402994-01 | ND |
| 2014-04-24 | C402994-02 | ND |
| 2014-04-24 | C403019-01 | ND |
| 2014-04-28 | C402975-02 | ND |
| 2014-04-28 | C402982-01 | ND |
| 2014-04-28 | C403002-01 | ND |
| 2014-05-07 | C402983-01 | ND |
| 2014-05-08 | C404693-01 | ND |
| 2014-05-19 | C405410-01 | ND |
| 2014-06-25 | C408252-01RE1 | ND |
| 2014-06-25 | C407473-01 | ND |
| 2014-07-07 | C407794-01RE2 | ND |
| 2014-07-09 | C407787-01 | ND |
| 2014-07-10 | C407792-01 | ND |
| 2014-07-16 | C407801-01RE1 | ND |
| 2014-07-16 | C408014-01 | ND |
| 2014-07-21 | C408795-01RE1 | ND |
| 2014-07-22 | C407785-01 | ND |
| 2014-07-22 | C407779-01RE1 | ND |
| 2014-07-23 | C407773-01 | ND |
| 2014-07-23 | C407773-02RE2 | ND |
| 2014-07-23 | C407773-03 | ND |
| 2014-07-23 | C407815-01 | ND |
| 2014-07-23 | C409349-01 | ND |
| 2014-07-29 | C407777-01 | ND |
| 2014-07-30 | C407774-01RE1 | ND |
| 2014-07-30 | C407775-01RE2 | ND |
| 2014-07-30 | C407810-01RE2 | ND |
| 2014-07-31 | C407783-03RE2 | ND |
| 2014-07-31 | C407796-01RE1 | ND |
| 2014-07-31 | C407798-01RE2 | ND |
| 2014-08-04 | C409898-01RE2 | ND |
| 2014-08-04 | C409898-02 | ND |
| 2014-08-18 | C407776-01RE1 | ND |
| 2014-08-25 | C410753-01RE2 | ND |
| 2014-08-28 | C409121-01 | ND |
| 2014-09-23 | C412353-01RE4 | ND |
| 2014-10-02 | C411977-01 | ND |
| 2014-10-07 | C411986-01 | ND |
| 2014-10-07 | C411986-02 | ND |
| 2014-10-07 | C411994-01 | ND |
| 2014-10-13 | C411981-01 | ND |
| 2014-10-15 | C411988-01 | ND |
| 2014-10-20 | C413673-01 | ND |
| 2014-10-21 | C411992-01RE1 | ND |
| 2014-10-21 | C411997-01 | ND |
| 2014-10-31 | C411991-01 | ND |
| 2015-01-20 | ND | |
| 2015-01-21 | ND | |
| 2015-01-21 | ND | |
| 2015-01-21 | ND | |
| 2015-01-22 | ND | |
| 2015-01-22 | ND | |
| 2015-01-23 | ND | |
| 2015-01-26 | ND | |
| 2015-01-27 | ND | |
| 2015-01-28 | ND | |
| 2015-01-28 | ND | |
| 2015-01-28 | ND | |
| 2015-01-28 | ND | |
| 2015-01-28 | ND | |
| 2015-01-29 | ND | |
| 2015-01-29 | ND | |
| 2015-01-30 | ND | |
| 2015-01-30 | ND | |
| 2015-02-03 | ND | |
| 2015-04-10 | ND | |
| 2015-04-16 | ND | |
| 2015-04-20 | ND | |
| 2015-04-22 | ND | |
| 2015-04-22 | ND | |
| 2015-04-22 | ND | |
| 2015-04-22 | ND | |
| 2015-04-23 | ND | |
| 2015-04-23 | ND | |
| 2015-04-23 | ND | |
| 2015-04-24 | ND | |
| 2015-04-24 | ND | |
| 2015-04-28 | ND | |
| 2015-04-28 | ND | |
| 2015-04-29 | ND | |
| 2015-04-29 | ND | |
| 2015-04-29 | ND | |
| 2015-04-29 | ND | |
| 2015-04-29 | ND | |
| 2015-04-30 | ND | |
| 2015-04-30 | ND | |
| 2015-05-06 | ND | |
| 2015-05-06 | ND | |
| 2015-05-06 | ND | |
| 2015-05-06 | ND | |
| 2015-05-06 | ND | |
| 2015-05-06 | ND | |
| 2015-05-07 | ND | |
| 2015-05-13 | ND | |
| 2015-05-13 | ND | |
| 2015-07-10 | ND | |
| 2015-07-15 | ND | |
| 2015-07-15 | ND | |
| 2015-07-21 | ND | |
| 2015-07-21 | ND | |
| 2015-07-22 | ND | |
| 2015-07-22 | ND | |
| 2015-07-22 | ND | |
| 2015-07-23 | ND | |
| 2015-07-29 | ND | |
| 2015-07-29 | ND | |
| 2015-07-30 | ND | |
| 2015-07-30 | ND | |
| 2015-07-31 | ND | |
| 2015-07-31 | ND | |
| 2015-08-05 | ND | |
| 2015-08-05 | ND | |
| 2015-08-07 | ND | |
| 2015-08-10 | ND | |
| 2015-10-09 | ND | |
| 2015-10-21 | ND | |
| 2015-11-04 | ND | |
| 2016-01-05 | C515812-01 | ND |
| 2016-01-05 | C515839-01RE1 | ND |
| 2016-01-07 | C515785-01 | ND |
| 2016-01-07 | C515788-01 | ND |
| 2016-01-12 | C515799-01 | ND |
| 2016-01-13 | C515798-02RE1 | 0.230 ppb |
| 2016-01-18 | C515792-01RE1 | ND |
| 2016-01-18 | C515808-01 | ND |
| 2016-01-27 | C515838-01 | ND |
| 2016-02-09 | CZ01814-01 | ND |
| 2016-02-10 | C515826-01 | ND |
| 2016-02-17 | C515800-01 | ND |
| 2016-02-18 | CZ02145-01RE2 | ND |
| 2016-02-22 | C515781-01 | ND |
| 2016-02-25 | CZ02371-01 | ND |
| 2016-03-17 | C515833-01 | ND |
| 2016-03-17 | C515833-02 | ND |
| 2016-03-23 | CZ02855-01 | ND |
| 2016-04-14 | CZ03127-01 | ND |
| 2016-04-18 | CZ03146-01 | ND |
| 2016-04-18 | CZ03146-02 | ND |
| 2016-04-18 | CZ03170-01 | ND |
| 2016-04-19 | CZ03132-01 | ND |
| 2016-04-19 | CZ03136-01 | ND |
| 2016-04-19 | CZ03149-01 | ND |
| 2016-04-20 | CZ03154-01 | ND |
| 2016-04-21 | CZ03167-01 | ND |
| 2016-04-21 | CZ03116-01 | ND |
| 2016-04-22 | CZ03118-01RE3 | ND |
| 2016-04-26 | CZ03122-01 | ND |
| 2016-04-26 | CZ03157-01 | ND |
| 2016-04-28 | CZ03139-01 | ND |
| 2016-04-28 | CZ03164-01 | ND |
| 2016-04-28 | CZ03164-02 | ND |
| 2016-05-03 | CZ03150-01RE2 | ND |
| 2016-05-03 | CZ03151-01 | ND |
| 2016-05-03 | CZ06064-01 | ND |
| 2016-05-04 | CZ03134-01RE1 | ND |
| 2016-05-04 | CZ03152-01 | ND |
| 2016-05-17 | CZ03120-01 | ND |
| 2016-05-17 | CZ07299-01RE1 | ND |
| 2016-05-19 | CZ03142-02 | ND |
| 2016-05-19 | CZ03142-01 | ND |
| 2016-05-24 | CZ03126-01 | ND |
| 2016-05-27 | CZ03113-01 | ND |
| 2016-06-09 | CZ03162-01 | ND |
| 2016-06-14 | CZ09074-01 | ND |
| 2016-07-05 | CZ08305-01 | ND |
| 2016-07-07 | CZ08293-01 | ND |
| 2016-07-08 | CZ08299-01 | ND |
| 2016-07-11 | CZ08312-01 | ND |
| 2016-07-18 | CZ08295-01 | ND |
| 2016-07-28 | CZ08294-01 | ND |
| 2016-07-28 | CZ08308-01 | ND |
| 2016-07-28 | CZ08309-01 | ND |
| 2016-07-28 | CZ08310-01 | ND |
| 2016-08-04 | CZ08302-01 | ND |
| 2016-08-09 | CZ08313-01 | ND |
| 2016-08-16 | CZ08300-01 | ND |
| 2016-08-17 | CZ12208-01 | ND |
| 2016-08-30 | CZ13065-01 | ND |
| 2016-09-19 | CZ08291-01 | ND |
| 2016-10-12 | CZ13732-01 | ND |
| 2016-11-17 | CZ13727-01 | ND |
| 2017-01-16 | CZ18677-01 | ND |
| 2017-01-16 | CZ18677-02 | ND |
| 2017-01-17 | CZ18655-01 | ND |
| 2017-01-17 | CZ18681-01RE1 | ND |
| 2017-01-18 | CZ18651-01 | ND |
| 2017-01-18 | CZ18684-01 | ND |
| 2017-01-19 | CZ18712-01 | ND |
| 2017-01-19 | CZ18715-01RE1 | ND |
| 2017-01-20 | CZ18696-01 | ND |
| 2017-01-20 | CZ18704-02 | ND |
| 2017-01-25 | CZ18708-01 | ND |
| 2017-01-25 | CA01150-01 | ND |
| 2017-01-30 | CA01345-01 | ND |
| 2017-02-01 | CA01491-01 | ND |
| 2017-02-01 | CZ18670-01RE1 | ND |
| 2017-02-01 | CZ18700-01RE2 | ND |
| 2017-02-03 | CZ18706-02RE2 | ND |
| 2017-02-03 | CZ18662-01RE1 | ND |
| 2017-02-17 | CA02512-01 | ND |
| 2017-04-17 | CA02814-02 | ND |
| 2017-04-17 | CA02834-01 | ND |
| 2017-04-18 | CA02803-01 | ND |
| 2017-04-18 | CA02803-03RE1 | ND |
| 2017-04-18 | CA02826-01RE1 | ND |
| 2017-04-18 | CA02826-02 | ND |
| 2017-04-19 | CA02810-01 | ND |
| 2017-04-19 | CA02805-01RE3 | ND |
| 2017-04-19 | CA02829-01 | ND |
| 2017-04-19 | CA02852-01 | ND |
| 2017-04-19 | CA02853-01 | ND |
| 2017-04-19 | CA02855-01 | ND |
| 2017-04-20 | CA02806-01 | ND |
| 2017-04-20 | CA02808-01 | ND |
| 2017-04-24 | CA02828-01 | ND |
| 2017-04-24 | CA02828-02 | ND |
| 2017-04-24 | CA02830-01 | ND |
| 2017-04-24 | CA02807-01RE1 | ND |
| 2017-04-24 | CA02809-01 | ND |
| 2017-04-24 | CA02809-02 | ND |
| 2017-04-24 | CA02815-01 | ND |
| 2017-05-01 | CA06485-01RE1 | ND |
| 2017-05-03 | CA02857-01 | ND |
| 2017-05-04 | CA02842-03 | ND |
| 2017-05-08 | CA02824-01 | ND |
| 2017-05-10 | CA02851-01 | ND |
| 2017-05-11 | CA02845-01 | ND |
| 2017-05-11 | CA07290-01 | ND |
| 2017-05-18 | CA02846-01RE1 | ND |
| 2017-05-18 | CA02846-02 | ND |
| 2017-05-23 | CA02832-01 | ND |
| 2017-05-24 | CA08392-01RE1 | ND |
| 2017-05-25 | CA02849-02RE2 | ND |
| 2017-05-25 | CA08414-01RE2 | ND |
| 2017-05-31 | CA08567-01RE1 | ND |
| 2017-06-05 | CA02821-01 | ND |
| 2017-06-07 | CA02812-01 | ND |
| 2017-06-09 | CA09033-01 | ND |
| 2017-07-10 | CA07669-01RE1 | ND |
| 2017-07-12 | CA07661-01 | ND |
| 2017-07-12 | CA07659-01 | ND |
| 2017-07-12 | CA07659-03RE1 | ND |
| 2017-07-12 | CA07664-01RE1 | ND |
| 2017-07-12 | CA07688-01RE1 | ND |
| 2017-07-13 | CA07662-01 | ND |
| 2017-07-19 | CA07671-01 | ND |
| 2017-07-19 | CA07675-01 | ND |
| 2017-07-19 | CA07675-02 | ND |
| 2017-07-20 | CA07880-01 | ND |
| 2017-07-21 | CA07677-01 | ND |
| 2017-07-21 | CA07667-01 | ND |
| 2017-07-21 | CA07663-01RE1 | ND |
| 2017-07-24 | CA07678-01RE2 | ND |
| 2017-07-26 | CA11475-01 | ND |
| 2017-09-06 | CA07680-01 | ND |
| 2017-09-13 | CA14347-01 | ND |
| 2017-09-22 | CA14697-01RE1 | ND |
| 2017-11-29 | CA14915-01RE1 | ND |
| 2018-01-22 | CA18131-01 | ND |
| 2018-01-23 | CA18180-01 | ND |
| 2018-01-24 | CA18103-01 | ND |
| 2018-01-24 | CA18117-01 | ND |
| 2018-01-24 | CA18138-01 | ND |
| 2018-01-24 | CA18182-01RE1 | ND |
| 2018-01-25 | CA18186-01 | ND |
| 2018-01-26 | CA18203-01 | ND |
| 2018-01-31 | CA18167-01 | ND |
| 2018-02-01 | CA18190-01 | ND |
| 2018-02-01 | CA18190-02RE1 | ND |
| 2018-02-01 | CA18195-01RE1 | ND |
| 2018-02-01 | CA18195-03 | ND |
| 2018-02-02 | CA18129-01 | ND |
| 2018-02-08 | CA18122-01 | ND |
| 2018-02-08 | CA18127-01 | ND |
| 2018-02-08 | CA18202-01 | ND |
| 2018-03-27 | CB04380-01RE2 | ND |
| 2018-04-05 | CB03226-01 | ND |
| 2018-04-05 | CB03226-02 | ND |
| 2018-04-05 | CB03226-03 | ND |
| 2018-04-13 | CB03220-01RE1 | ND |
| 2018-04-17 | CB03242-01RE1 | ND |
| 2018-04-17 | CB03263-01 | ND |
| 2018-04-18 | CB03239-01 | ND |
| 2018-04-18 | CB03245-01RE1 | ND |
| 2018-04-18 | CB03260-01RE1 | ND |
| 2018-04-18 | CB03260-03RE1 | ND |
| 2018-04-19 | CB03233-01 | ND |
| 2018-04-19 | CB03246-01 | ND |
| 2018-04-19 | CB03254-01 | ND |
| 2018-04-19 | CB03256-05RE1 | ND |
| 2018-04-19 | CB03256-06 | ND |
| 2018-04-25 | CB03227-01 | ND |
| 2018-04-25 | CB03250-01 | ND |
| 2018-04-25 | CB03253-01 | ND |
| 2018-04-25 | CB06129-01 | ND |
| 2018-04-25 | CB06129-02 | ND |
| 2018-04-27 | CB03234-01 | ND |
| 2018-04-27 | CB03257-01 | ND |
| 2018-04-27 | CB03257-02 | ND |
| 2018-04-27 | CB03269-01 | ND |
| 2018-05-02 | CB06580-01RE1 | ND |
| 2018-05-03 | CB06594-01RE2 | ND |
| 2018-05-10 | CB07099-01 | ND |
| 2018-05-10 | CB07099-02 | ND |
| 2018-05-10 | CB07099-03RE1 | ND |
| 2018-05-21 | CB07571-01 | ND |
| 2018-05-21 | CB07571-02 | ND |
| 2018-05-24 | CB07822-01 | ND |
| 2018-05-24 | CB07822-02 | ND |
| 2018-06-21 | CB03270-01 | ND |
| 2018-07-19 | CB08093-01 | ND |
| 2018-07-19 | CB08098-01 | ND |
| 2018-07-24 | CB08082-01 | ND |
| 2018-07-25 | CB08089-01 | ND |
| 2018-07-26 | CB08105-01 | ND |
| 2018-07-26 | CB08105-03 | ND |
| 2018-08-02 | CB08100-01 | ND |
| 2018-08-02 | CB08100-02RE2 | ND |
| 2018-08-02 | CB08100-03 | ND |
| 2018-08-02 | CB08100-04 | ND |
| 2018-08-02 | CB08100-05 | ND |
| 2018-08-02 | CB08100-06 | ND |
| 2018-08-02 | CB11707-01RE2 | ND |
| 2018-08-03 | CB11829-01RE1 | ND |
| 2018-08-03 | CB11829-02RE1 | ND |
| 2018-08-03 | CB11829-03RE1 | ND |
| 2018-08-09 | CB08084-01 | ND |
| 2018-08-09 | CB08084-02 | ND |
| 2018-08-09 | CB08084-03RE2 | ND |
| 2018-09-25 | CB14505-01 | ND |
| 2018-10-25 | CB14501-01 | ND |
| 2018-10-26 | CB16357-01RE2 | ND |
| 2019-01-11 | CB18625-01 | ND |
| 2019-01-18 | CB18614-01 | ND |
| 2019-01-18 | CB18618-01 | ND |
| 2019-01-23 | CB18667-01RE3 | ND |
| 2019-01-24 | CB18673-01 | ND |
| 2019-01-29 | CC01414-01 | ND |
| 2019-02-06 | CB18677-01RE1 | ND |
| 2019-02-08 | CB18631-01 | ND |
| 2019-02-08 | CB18632-01RE1 | ND |
| 2019-02-08 | CB18632-02RE1 | ND |
| 2019-02-08 | CB18659-01 | ND |
| 2019-02-15 | CB18644-01 | ND |
| 2019-02-21 | CB18621-01 | ND |
| 2019-02-21 | CB18621-02_A | ND |
| 2019-02-21 | CB18621-03RE1 | ND |
| 2019-02-22 | CB18630-01 | ND |
| 2019-02-22 | CB18630-02 | ND |
| 2019-03-12 | CB18640-01 | ND |
| 2019-03-12 | CB18674-01 | ND |
| 2019-04-12 | CC03992-01 | ND |
| 2019-04-15 | CC04002-01 | ND |
| 2019-04-15 | CC04011-01 | ND |
| 2019-04-15 | CC04040-01 | ND |
| 2019-04-17 | CC03996-01 | ND |
| 2019-04-17 | CC04016-01 | ND |
| 2019-04-18 | CC03999-01RE1 | ND |
| 2019-04-18 | CC04004-01RE1 | ND |
| 2019-04-18 | CC04057-01RE1 | ND |
| 2019-04-24 | CC04037-01 | ND |
| 2019-04-24 | CC04054-01 | ND |
| 2019-04-24 | CC04054-02 | ND |
| 2019-04-25 | CC04031-01 | ND |
| 2019-04-25 | CC06331-01 | ND |
| 2019-04-26 | CC04019-01RE1 | ND |
| 2019-04-26 | CC04019-02 | ND |
| 2019-04-26 | CC04027-01 | ND |
| 2019-04-26 | CC04027-02 | ND |
| 2019-05-01 | CC04009-02 | ND |
| 2019-05-02 | CC04021-01 | ND |
| 2019-05-03 | CC04024-01RE2 | ND |
| 2019-05-03 | CC04024-02 | ND |
| 2019-05-03 | CC04024-03 | ND |
| 2019-05-03 | CC04035-01 | ND |
| 2019-05-03 | CC04043-01 | ND |
| 2019-05-03 | CC04050-01 | ND |
| 2019-05-14 | CC04060-01 | ND |
| 2019-05-14 | CC07576-01RE1 | ND |
| 2019-05-15 | CC04063-01 | ND |
| 2019-06-13 | CC04038-01 | ND |
| 2019-06-28 | CC04036-01 | ND |
| 2019-07-24 | CC10474-01 | ND |
| 2019-07-25 | CC10488-01 | ND |
| 2019-07-26 | CC10509-01 | ND |
| 2019-08-02 | CC10496-01 | ND |
| 2019-08-15 | CC10479-01 | ND |
| 2019-08-15 | CC10485-01 | ND |
| 2019-08-15 | CC10485-02 | ND |
| 2019-08-15 | CC10485-03 | ND |
| 2019-08-15 | CC10497-01 | ND |
| 2019-08-28 | CC10491-01 | ND |
| 2019-08-28 | CC10493-01RE2 | ND |
| 2019-08-28 | CC10494-01 | ND |
| 2019-09-10 | CC10476-01 | ND |
| 2019-09-10 | CC10477-01RE1 | ND |
| 2019-09-10 | CC10483-01 | ND |
| 2019-10-22 | CC15781-01RE1 | ND |
| 2019-11-07 | CC15767-01 | ND |
| 2019-11-19 | CC15773-01 | ND |