Cyanide
Ridgewood Water
Cyanide is a toxic chemical that causes central nervous system and thyroid toxicity. Water contamination is generally the result of metal mining and chemical industry waste, runoff from agriculture and road salts used for melting ice.
346
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 | 52 | 0 | ND |
| 2015 | ND | 54 | 0 | ND |
| 2016 | ND | 57 | 0 | ND |
| 2017 | ND | 64 | 0 | ND |
| 2018 | ND | 62 | 0 | ND |
| 2019 | ND | 57 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 150 ppb
The EWG Health Guideline of 150 ppb for cyanide 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 harm to the brain and nervous system.
EPA Maximum Contaminant
Level (MCL) 200 ppb
The legal limit for cyanide, established in 1992, was based on a 1955 toxicity study conducted in laboratory animals. This limit does not include any additional consideration of children’s health.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-03-05 | 4030099-08 | ND |
| 2014-03-05 | 4030099-05 | ND |
| 2014-03-05 | 4030099-06 | ND |
| 2014-03-05 | 4030099-03 | ND |
| 2014-03-05 | 4030099-09 | ND |
| 2014-03-05 | 4030099-07 | ND |
| 2014-03-05 | 4030099-01 | ND |
| 2014-03-05 | 4030099-02 | ND |
| 2014-03-05 | 4030099-11 | ND |
| 2014-03-05 | 4030099-04 | ND |
| 2014-03-05 | 4030099-10 | ND |
| 2014-05-28 | 4050791-09 | ND |
| 2014-05-28 | 4050791-01 | ND |
| 2014-05-28 | 4050791-04 | ND |
| 2014-05-28 | 4050791-02 | ND |
| 2014-05-28 | 4050791-03 | ND |
| 2014-05-28 | 4050791-06 | ND |
| 2014-05-28 | 4050791-05 | ND |
| 2014-05-28 | 4050791-07 | ND |
| 2014-05-28 | 4050791-08 | ND |
| 2014-07-09 | 4070294-06 | ND |
| 2014-07-09 | 4070294-14 | ND |
| 2014-07-09 | 4070294-07 | ND |
| 2014-07-09 | 4070294-04 | ND |
| 2014-07-09 | 4070294-01 | ND |
| 2014-07-09 | 4070294-08 | ND |
| 2014-07-09 | 4070294-02 | ND |
| 2014-07-09 | 4070294-05 | ND |
| 2014-07-09 | 4070294-03 | ND |
| 2014-07-09 | 4070294-09 | ND |
| 2014-07-09 | 4070294-12 | ND |
| 2014-07-09 | 4070294-11 | ND |
| 2014-07-09 | 4070294-10 | ND |
| 2014-07-09 | 4070294-13 | ND |
| 2014-07-23 | 4070750-04 | ND |
| 2014-07-23 | 4070750-02 | ND |
| 2014-07-23 | 4070750-05 | ND |
| 2014-07-23 | 4070750-01 | ND |
| 2014-07-23 | 4070750-06 | ND |
| 2014-07-23 | 4070750-03 | ND |
| 2014-10-29 | 4100857-04 | ND |
| 2014-10-29 | 4100857-03 | ND |
| 2014-10-29 | 4100857-05 | ND |
| 2014-10-29 | 4100857-12 | ND |
| 2014-10-29 | 4100857-01 | ND |
| 2014-10-29 | 4100857-08 | ND |
| 2014-10-29 | 4100857-09 | ND |
| 2014-10-29 | 4100857-02 | ND |
| 2014-10-29 | 4100857-07 | ND |
| 2014-10-29 | 4100857-06 | ND |
| 2014-10-29 | 4100857-10 | ND |
| 2014-10-29 | 4100857-11 | ND |
| 2015-03-09 | 5030145-09 | ND |
| 2015-03-09 | 5030145-02 | ND |
| 2015-03-09 | 5030145-01 | ND |
| 2015-03-09 | 5030145-04 | ND |
| 2015-03-09 | 5030145-06 | ND |
| 2015-03-09 | 5030145-11 | ND |
| 2015-03-09 | 5030145-05 | ND |
| 2015-03-09 | 5030145-08 | ND |
| 2015-03-09 | 5030145-07 | ND |
| 2015-03-09 | 5030145-03 | ND |
| 2015-03-09 | 5030145-10 | ND |
| 2015-03-10 | 5030178-01 | ND |
| 2015-03-30 | 5030652-01 | ND |
| 2015-03-31 | 5040020-01 | ND |
| 2015-05-12 | 5050322-09 | ND |
| 2015-05-12 | 5050322-03 | ND |
| 2015-05-12 | 5050322-06 | ND |
| 2015-05-12 | 5050322-01 | ND |
| 2015-05-12 | 5050322-08 | ND |
| 2015-05-12 | 5050322-07 | ND |
| 2015-05-12 | 5050322-02 | ND |
| 2015-05-12 | 5050322-10 | ND |
| 2015-05-13 | 5050377-01 | ND |
| 2015-06-09 | 5060246-08 | ND |
| 2015-07-15 | 5070473-07 | ND |
| 2015-07-15 | 5070473-03 | ND |
| 2015-07-15 | 5070473-05 | ND |
| 2015-07-15 | 5070473-01 | ND |
| 2015-07-15 | 5070473-08 | ND |
| 2015-07-15 | 5070473-02 | ND |
| 2015-07-15 | 5070473-06 | ND |
| 2015-07-15 | 5070473-04 | ND |
| 2015-07-15 | 5070473-10 | ND |
| 2015-07-15 | 5070473-09 | ND |
| 2015-07-15 | 5070473-13 | ND |
| 2015-07-15 | 5070473-12 | ND |
| 2015-07-15 | 5070473-11 | ND |
| 2015-07-15 | 5070473-14 | ND |
| 2015-07-16 | 5070495-01 | ND |
| 2015-10-14 | 5100424-04 | ND |
| 2015-10-14 | 5100424-03 | ND |
| 2015-10-14 | 5100424-10 | ND |
| 2015-10-14 | 5100424-05 | ND |
| 2015-10-14 | 5100424-01 | ND |
| 2015-10-14 | 5100424-09 | ND |
| 2015-10-14 | 5100424-02 | ND |
| 2015-10-14 | 5100424-07 | ND |
| 2015-10-14 | 5100424-06 | ND |
| 2015-10-14 | 5100424-08 | ND |
| 2015-10-21 | 5100667-03 | ND |
| 2015-10-21 | 5100667-02 | ND |
| 2015-10-21 | 5100667-04 | ND |
| 2015-10-21 | 5100667-01 | ND |
| 2015-12-29 | 5120773-02 | ND |
| 2016-01-07 | 6010110-06 | ND |
| 2016-01-07 | 6010110-01 | ND |
| 2016-01-07 | 6010110-07 | ND |
| 2016-01-07 | 6010110-04 | ND |
| 2016-01-07 | 6010110-02 | ND |
| 2016-01-07 | 6010110-05 | ND |
| 2016-01-07 | 6010110-03 | ND |
| 2016-01-07 | 6010110-09 | ND |
| 2016-01-07 | 6010110-10 | ND |
| 2016-01-07 | 6010110-11 | ND |
| 2016-01-07 | 6010110-08 | ND |
| 2016-01-07 | 6010110-12 | ND |
| 2016-01-08 | 6010173-01 | ND |
| 2016-01-08 | 6010173-02 | ND |
| 2016-04-06 | 6040180-04 | ND |
| 2016-04-06 | 6040180-06 | ND |
| 2016-04-06 | 6040180-05 | ND |
| 2016-04-06 | 6040180-02 | ND |
| 2016-04-06 | 6040180-03 | ND |
| 2016-04-06 | 6040180-01 | ND |
| 2016-04-06 | 6040180-08 | ND |
| 2016-04-06 | 6040180-07 | ND |
| 2016-04-06 | 6040180-09 | ND |
| 2016-04-19 | 6040629-02 | ND |
| 2016-04-19 | 6040629-01 | ND |
| 2016-05-03 | 6050075-01 | ND |
| 2016-05-11 | 6050372-04 | ND |
| 2016-07-06 | 6070112-06 | ND |
| 2016-07-06 | 6070112-09 | ND |
| 2016-07-06 | 6070112-07 | ND |
| 2016-07-06 | 6070112-04 | ND |
| 2016-07-06 | 6070112-01 | ND |
| 2016-07-06 | 6070112-08 | ND |
| 2016-07-06 | 6070112-02 | ND |
| 2016-07-06 | 6070112-05 | ND |
| 2016-07-06 | 6070112-03 | ND |
| 2016-07-06 | 6070112-11 | ND |
| 2016-07-06 | 6070112-10 | ND |
| 2016-07-06 | 6070112-14 | ND |
| 2016-07-06 | 6070112-13 | ND |
| 2016-07-06 | 6070112-12 | ND |
| 2016-07-06 | 6070112-15 | ND |
| 2016-10-11 | 6100288-07 | ND |
| 2016-10-11 | 6100288-06 | ND |
| 2016-10-11 | 6100288-11 | ND |
| 2016-10-11 | 6100288-08 | ND |
| 2016-10-11 | 6100288-04 | ND |
| 2016-10-11 | 6100288-03 | ND |
| 2016-10-11 | 6100288-09 | ND |
| 2016-10-11 | 6100288-01 | ND |
| 2016-10-11 | 6100288-05 | ND |
| 2016-10-11 | 6100288-02 | ND |
| 2016-10-11 | 6100288-10 | ND |
| 2016-10-11 | 6100288-13 | ND |
| 2016-10-11 | 6100288-12 | ND |
| 2016-10-11 | 6100288-14 | ND |
| 2016-10-11 | 6100288-15 | ND |
| 2017-01-18 | 7010444-04 | ND |
| 2017-01-18 | 7010444-07 | ND |
| 2017-01-18 | 7010444-05 | ND |
| 2017-01-18 | 7010444-03 | ND |
| 2017-01-18 | 7010444-02 | ND |
| 2017-01-18 | 7010444-06 | ND |
| 2017-01-18 | 7010444-01 | ND |
| 2017-01-18 | 7010444-10 | ND |
| 2017-01-18 | 7010444-11 | ND |
| 2017-01-18 | 7010444-12 | ND |
| 2017-01-18 | 7010444-14 | ND |
| 2017-01-18 | 7010444-13 | ND |
| 2017-01-18 | 7010444-08 | ND |
| 2017-01-18 | 7010444-09 | ND |
| 2017-01-18 | 7010444-15 | ND |
| 2017-01-18 | 7010444-16 | ND |
| 2017-01-24 | 7010573-01 | ND |
| 2017-04-18 | 7040506-04 | ND |
| 2017-04-18 | 7040506-06 | ND |
| 2017-04-18 | 7040506-05 | ND |
| 2017-04-20 | 7040580-05 | ND |
| 2017-04-20 | 7040580-01 | ND |
| 2017-04-20 | 7040580-10 | ND |
| 2017-04-20 | 7040580-03 | ND |
| 2017-04-20 | 7040580-02 | ND |
| 2017-04-20 | 7040580-04 | ND |
| 2017-04-20 | 7040580-07 | ND |
| 2017-04-20 | 7040580-08 | ND |
| 2017-04-20 | 7040580-06 | ND |
| 2017-04-20 | 7040580-09 | ND |
| 2017-05-10 | 7050367-02 | ND |
| 2017-05-10 | 7050367-01 | ND |
| 2017-05-17 | 7050640-03 | ND |
| 2017-07-05 | 7070048-06 | ND |
| 2017-07-05 | 7070048-10 | ND |
| 2017-07-05 | 7070048-07 | ND |
| 2017-07-05 | 7070048-04 | ND |
| 2017-07-05 | 7070048-03 | ND |
| 2017-07-05 | 7070025-01 | ND |
| 2017-07-05 | 7070048-08 | ND |
| 2017-07-05 | 7070048-01 | ND |
| 2017-07-05 | 7070048-05 | ND |
| 2017-07-05 | 7070048-02 | ND |
| 2017-07-05 | 7070048-09 | ND |
| 2017-07-05 | 7070048-12 | ND |
| 2017-07-05 | 7070048-11 | ND |
| 2017-07-05 | 7070048-15 | ND |
| 2017-07-05 | 7070048-14 | ND |
| 2017-07-05 | 7070048-13 | ND |
| 2017-10-03 | 7100035-07 | ND |
| 2017-10-03 | 7100035-06 | ND |
| 2017-10-03 | 7100035-08 | ND |
| 2017-10-03 | 7100035-12 | ND |
| 2017-10-03 | 7100035-09 | ND |
| 2017-10-03 | 7100035-04 | ND |
| 2017-10-03 | 7100035-03 | ND |
| 2017-10-03 | 7100035-10 | ND |
| 2017-10-03 | 7100035-01 | ND |
| 2017-10-03 | 7100035-05 | ND |
| 2017-10-03 | 7100035-02 | ND |
| 2017-10-03 | 7100035-11 | ND |
| 2017-10-03 | 7100035-14 | ND |
| 2017-10-03 | 7100035-13 | ND |
| 2017-10-03 | 7100035-15 | ND |
| 2018-01-03 | 8010030-05 | ND |
| 2018-01-03 | 8010030-04 | ND |
| 2018-01-03 | 8010030-03 | ND |
| 2018-01-03 | 8010030-02 | ND |
| 2018-01-03 | 8010030-01 | ND |
| 2018-01-03 | 8010030-06 | ND |
| 2018-01-03 | 8010030-07 | ND |
| 2018-01-03 | 8010030-08 | ND |
| 2018-01-09 | 8010168-03 | ND |
| 2018-01-09 | 8010168-04 | ND |
| 2018-01-09 | 8010168-01 | ND |
| 2018-01-09 | 8010168-02 | ND |
| 2018-01-09 | 8010168-05 | ND |
| 2018-01-09 | 8010168-06 | ND |
| 2018-02-05 | 8020087-03 | ND |
| 2018-04-03 | 8040027-06 | ND |
| 2018-04-03 | 8040027-01 | ND |
| 2018-04-03 | 8040027-07 | ND |
| 2018-04-03 | 8040027-04 | ND |
| 2018-04-03 | 8040027-03 | ND |
| 2018-04-03 | 8040027-08 | ND |
| 2018-04-03 | 8040027-05 | ND |
| 2018-04-03 | 8040027-02 | ND |
| 2018-04-03 | 8040027-09 | ND |
| 2018-04-03 | 8040027-11 | ND |
| 2018-04-03 | 8040027-10 | ND |
| 2018-04-04 | 8040074-03 | ND |
| 2018-04-04 | 8040074-05 | ND |
| 2018-04-26 | 8040945-02 | ND |
| 2018-04-26 | 8040945-01 | ND |
| 2018-07-02 | 8070013-07 | ND |
| 2018-07-02 | 8070013-11 | ND |
| 2018-07-02 | 8070013-08 | ND |
| 2018-07-02 | 8070013-05 | ND |
| 2018-07-02 | 8070013-04 | ND |
| 2018-07-02 | 8070013-01 | ND |
| 2018-07-02 | 8070013-09 | ND |
| 2018-07-02 | 8070013-02 | ND |
| 2018-07-02 | 8070013-06 | ND |
| 2018-07-02 | 8070013-03 | ND |
| 2018-07-02 | 8070013-10 | ND |
| 2018-07-02 | 8070013-13 | ND |
| 2018-07-02 | 8070013-14 | ND |
| 2018-07-02 | 8070013-12 | ND |
| 2018-07-02 | 8070013-16 | ND |
| 2018-07-02 | 8070013-15 | ND |
| 2018-10-02 | 8100082-08 | ND |
| 2018-10-02 | 8100082-07 | ND |
| 2018-10-02 | 8100082-09 | ND |
| 2018-10-02 | 8100082-01 | ND |
| 2018-10-02 | 8100082-05 | ND |
| 2018-10-02 | 8100082-04 | ND |
| 2018-10-02 | 8100082-02 | ND |
| 2018-10-02 | 8100082-06 | ND |
| 2018-10-02 | 8100082-03 | ND |
| 2018-10-03 | 8100136-01 | ND |
| 2018-10-03 | 8100136-02 | ND |
| 2018-10-03 | 8100136-03 | ND |
| 2018-10-03 | 8100136-05 | ND |
| 2018-10-03 | 8100136-06 | ND |
| 2018-10-03 | 8100136-04 | ND |
| 2018-10-03 | 8100136-07 | ND |
| 2019-01-10 | 9010342-02 | ND |
| 2019-01-10 | 9010342-06 | ND |
| 2019-01-10 | 9010342-03 | ND |
| 2019-01-10 | 9010342-01 | ND |
| 2019-01-10 | 9010342-09 | ND |
| 2019-01-10 | 9010342-04 | ND |
| 2019-01-10 | 9010342-08 | ND |
| 2019-01-10 | 9010342-05 | ND |
| 2019-01-10 | 9010342-15 | ND |
| 2019-01-10 | 9010342-14 | ND |
| 2019-01-10 | 9010342-13 | ND |
| 2019-01-10 | 9010342-11 | ND |
| 2019-01-10 | 9010342-12 | ND |
| 2019-01-10 | 9010342-07 | ND |
| 2019-01-10 | 9010342-16 | ND |
| 2019-01-10 | 9010342-10 | ND |
| 2019-04-10 | 9040481-02 | ND |
| 2019-04-10 | 9040481-06 | ND |
| 2019-04-10 | 9040481-12 | ND |
| 2019-04-10 | 9040481-07 | ND |
| 2019-04-10 | 9040481-11 | ND |
| 2019-04-10 | 9040481-10 | ND |
| 2019-04-10 | 9040481-09 | ND |
| 2019-04-10 | 9040481-01 | ND |
| 2019-04-10 | 9040481-03 | ND |
| 2019-04-10 | 9040481-08 | ND |
| 2019-04-10 | 9040481-05 | ND |
| 2019-04-10 | 9040481-04 | ND |
| 2019-07-24 | 9071191-08 | ND |
| 2019-07-24 | 9071191-14 | ND |
| 2019-07-24 | 9071191-02 | ND |
| 2019-07-24 | 9071191-01 | ND |
| 2019-07-24 | 9071191-05 | ND |
| 2019-07-24 | 9071191-09 | ND |
| 2019-07-24 | 9071191-11 | ND |
| 2019-07-24 | 9071191-07 | ND |
| 2019-07-24 | 9071191-06 | ND |
| 2019-07-24 | 9071191-10 | ND |
| 2019-07-24 | 9071191-03 | ND |
| 2019-07-24 | 9071191-13 | ND |
| 2019-07-24 | 9071191-12 | ND |
| 2019-07-24 | 9071191-04 | ND |
| 2019-09-19 | 9090882-01 | ND |
| 2019-10-09 | 9100466-06 | ND |
| 2019-10-09 | 9100466-07 | ND |
| 2019-10-09 | 9100466-13 | ND |
| 2019-10-09 | 9100466-03 | ND |
| 2019-10-09 | 9100466-01 | ND |
| 2019-10-09 | 9100466-11 | ND |
| 2019-10-09 | 9100466-09 | ND |
| 2019-10-09 | 9100466-05 | ND |
| 2019-10-09 | 9100466-08 | ND |
| 2019-10-09 | 9100466-04 | ND |
| 2019-10-09 | 9100466-12 | ND |
| 2019-10-09 | 9100466-10 | ND |
| 2019-10-09 | 9100466-02 | ND |
| 2019-12-04 | 9120094-01 | ND |