Arsenic
Yorba Linda Water District
Arsenic is a potent carcinogen and common contaminant in drinking water. Arsenic causes thousands of cases of cancer each year in the U.S. Click here to read more about arsenic.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 2.87 ppb | 47 | 46 | ND - 4.70 ppb |
2015 | 2.04 ppb | 52 | 38 | ND - 3.80 ppb |
2016 | 2.56 ppb | 52 | 47 | ND - 4.30 ppb |
2017 | 2.36 ppb | 49 | 37 | ND - 5.10 ppb |
2018 | 4.35 ppb | 52 | 51 | ND - 6.40 ppb |
2019 | 5.26 ppb | 51 | 51 | 4.50 ppb - 6.70 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.004 ppb
The EWG Health Guideline of 0.004 ppb for arsenic 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) 10 ppb
The legal limit for arsenic, established in 2001, was based on costs for arsenic removal, as calculated at the time that the standard was set. This limit does not fully protect against the risk of cancer due to arsenic exposure.
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2014-01-08 | 3761-012-1600 | 3.30 ppb |
2014-01-15 | 3761-012-1600 | 4.70 ppb |
2014-01-22 | 3761-012-1600 | 2.20 ppb |
2014-01-29 | 3761-012-1600 | 2.90 ppb |
2014-02-05 | 3761-012-1600 | 2.80 ppb |
2014-02-12 | 3761-012-1600 | 2.90 ppb |
2014-02-19 | 3761-012-1600 | 3.00 ppb |
2014-02-27 | 3761-012-0800 | 2.40 ppb |
2014-03-05 | 3761-012-1600 | 2.50 ppb |
2014-03-11 | 3761-012-1600 | 2.80 ppb |
2014-03-20 | 3761-012-1100 | 2.70 ppb |
2014-03-26 | 3761-012-1600 | 2.80 ppb |
2014-04-03 | 3761-012-0800 | 3.70 ppb |
2014-04-09 | 3761-012-1600 | 2.70 ppb |
2014-04-17 | 3761-012-0800 | 3.10 ppb |
2014-05-01 | 3761-012-0900 | 2.60 ppb |
2014-05-07 | 3761-012-1600 | 2.80 ppb |
2014-05-15 | 3761-012-0800 | 2.80 ppb |
2014-05-22 | 3761-012-0800 | 2.90 ppb |
2014-05-28 | 3761-012-1600 | 3.40 ppb |
2014-06-04 | 3761-012-1600 | 3.80 ppb |
2014-06-11 | 3761-012-1600 | 3.20 ppb |
2014-06-18 | 3761-012-1600 | 4.00 ppb |
2014-06-25 | 3761-012-1000 | 2.60 ppb |
2014-07-02 | 3761-012-1540 | 2.70 ppb |
2014-07-10 | 3761-012-0800 | 3.00 ppb |
2014-07-16 | 3761-012-1600 | 2.80 ppb |
2014-07-23 | 3761-012-1600 | 3.00 ppb |
2014-07-30 | 3761-012-1600 | 3.30 ppb |
2014-08-06 | 3761-012-1600 | 3.50 ppb |
2014-08-14 | 3761-012-0800 | 3.20 ppb |
2014-08-20 | 3761-012-1600 | 3.20 ppb |
2014-08-26 | 3761-012-1600 | 3.20 ppb |
2014-09-03 | 3761-012-1600 | 3.30 ppb |
2014-09-10 | 3761-012-1600 | 3.40 ppb |
2014-09-17 | 3761-012-1330 | 2.70 ppb |
2014-09-24 | 3761-012-1600 | 2.80 ppb |
2014-10-01 | 3761-012-1600 | 2.60 ppb |
2014-10-08 | 3761-012-1600 | 2.30 ppb |
2014-10-15 | 3761-012-1600 | 2.40 ppb |
2014-11-19 | 3761-012-1600 | 2.30 ppb |
2014-11-25 | 3761-012-1600 | 2.50 ppb |
2014-12-04 | 3761-012-0800 | 2.50 ppb |
2014-12-11 | 3761-012-0800 | ND |
2014-12-17 | 3761-012-1600 | 2.50 ppb |
2014-12-22 | 3761-012-1215 | 2.50 ppb |
2014-12-29 | 3761-012-1400 | 2.50 ppb |
2015-01-07 | 3761-012-1600 | ND |
2015-01-14 | 3761-012-1600 | 3.30 ppb |
2015-01-21 | 3761-012-1600 | 2.80 ppb |
2015-01-28 | 3761-012-1600 | 3.30 ppb |
2015-02-04 | 3761-012-1600 | ND |
2015-02-12 | 3761-012-0800 | 2.90 ppb |
2015-02-18 | 3761-012-1600 | 3.40 ppb |
2015-02-25 | 3761-012-1600 | 2.60 ppb |
2015-03-04 | 3761-012-1600 | ND |
2015-03-11 | 3761-012-1600 | ND |
2015-03-19 | 3761-012-0800 | 2.20 ppb |
2015-03-25 | 3761-012-1440 | ND |
2015-04-01 | 3761-012-0800 | 2.70 ppb |
2015-04-09 | 3761-012-0800 | 2.10 ppb |
2015-04-15 | 3761-012-1600 | ND |
2015-04-23 | 3761-012-0810 | 2.50 ppb |
2015-04-29 | 3761-012-1600 | 2.60 ppb |
2015-05-06 | 3761-012-1600 | ND |
2015-05-13 | 3761-012-1600 | ND |
2015-05-20 | 3761-012-1600 | 3.20 ppb |
2015-05-27 | 3761-012-1600 | 2.60 ppb |
2015-06-03 | 3761-012-1600 | 3.30 ppb |
2015-06-10 | 3761-012-1600 | ND |
2015-06-18 | 3761-012-0800 | 3.00 ppb |
2015-06-25 | 3761-012-0800 | 2.40 ppb |
2015-07-01 | 3761-012-1400 | 2.30 ppb |
2015-07-09 | 3761-012-0800 | 3.10 ppb |
2015-07-15 | 3761-012-0800 | 2.90 ppb |
2015-07-22 | 3761-012-1600 | 2.60 ppb |
2015-07-30 | 3761-012-0800 | 3.00 ppb |
2015-08-06 | 3761-012-0800 | ND |
2015-08-12 | 3761-012-1600 | 2.80 ppb |
2015-08-20 | 3761-012-0800 | 2.30 ppb |
2015-08-26 | 3761-012-1600 | ND |
2015-09-03 | 3761-012-0800 | 3.30 ppb |
2015-09-09 | 3761-012-1600 | 3.40 ppb |
2015-09-16 | 3761-012-0400 | 3.10 ppb |
2015-09-23 | 3761-012-0900 | 2.40 ppb |
2015-09-30 | 3761-012-0000 | 3.00 ppb |
2015-10-08 | 3761-012-0800 | ND |
2015-10-14 | 3761-012-1600 | 3.10 ppb |
2015-10-21 | 3761-012-1600 | 3.00 ppb |
2015-10-28 | 3761-012-1600 | 3.20 ppb |
2015-11-04 | 3761-012-1600 | 2.70 ppb |
2015-11-12 | 3761-012-0800 | 2.30 ppb |
2015-11-18 | 3761-012-1100 | 2.10 ppb |
2015-11-25 | 3761-012-0800 | 2.50 ppb |
2015-12-02 | 3761-012-1600 | 2.10 ppb |
2015-12-09 | 3761-012-1600 | 3.80 ppb |
2015-12-16 | 3761-012-1600 | 2.30 ppb |
2015-12-22 | 3761-012-0843 | ND |
2015-12-29 | 3761-012-0933 | ND |
2016-01-07 | 3761-012-0800 | ND |
2016-01-12 | 3761-012-1600 | 2.00 ppb |
2016-01-20 | 3761-012-1600 | 2.00 ppb |
2016-01-27 | 3761-012-1600 | 2.80 ppb |
2016-02-04 | 3761-012-0800 | 2.80 ppb |
2016-02-11 | 3761-012-0800 | 2.60 ppb |
2016-02-18 | 3761-012-0800 | 2.80 ppb |
2016-02-24 | 3761-012-1600 | 2.70 ppb |
2016-03-02 | 3761-012-1600 | 2.70 ppb |
2016-03-08 | 3761-012-1600 | 2.20 ppb |
2016-03-16 | 3761-012-1600 | 2.90 ppb |
2016-03-23 | 3761-012-1600 | 2.70 ppb |
2016-03-30 | 3761-012-1600 | 3.10 ppb |
2016-04-07 | 3761-012-0800 | 3.50 ppb |
2016-04-13 | 3761-012-0800 | 3.00 ppb |
2016-04-20 | 3761-012-1600 | 2.60 ppb |
2016-04-27 | 3761-012-1600 | 2.10 ppb |
2016-05-05 | 3761-012-0800 | 2.30 ppb |
2016-05-12 | 3761-012-0800 | 2.80 ppb |
2016-05-18 | 3761-012-1600 | 3.40 ppb |
2016-05-25 | 3761-012-1600 | 3.40 ppb |
2016-06-02 | 3761-012-0800 | 3.40 ppb |
2016-06-09 | 3761-012-0800 | 2.70 ppb |
2016-06-15 | 3761-012-1600 | ND |
2016-06-23 | 3761-012-0800 | 3.50 ppb |
2016-06-30 | 3761-012-1000 | 4.20 ppb |
2016-07-06 | 3761-012-1600 | 3.10 ppb |
2016-07-11 | 3761-012-0800 | 2.00 ppb |
2016-07-20 | 3761-012-1600 | 3.10 ppb |
2016-07-27 | 3761-012-1600 | 2.90 ppb |
2016-08-04 | 3761-012-0800 | 2.10 ppb |
2016-08-11 | 3761-012-0800 | 2.70 ppb |
2016-08-17 | 3761-012-1600 | ND |
2016-08-25 | 3761-012-0800 | 2.00 ppb |
2016-09-01 | 3761-012-0800 | 3.00 ppb |
2016-09-07 | 3761-012-1600 | ND |
2016-09-15 | 3761-012-1030 | 2.60 ppb |
2016-09-21 | 3761-012-1600 | 3.80 ppb |
2016-09-28 | 3761-012-1600 | 2.50 ppb |
2016-10-05 | 3761-012-1600 | 3.50 ppb |
2016-10-12 | 3761-012-0900 | 2.80 ppb |
2016-10-19 | 3761-012-1600 | 2.00 ppb |
2016-10-27 | 3761-012-0800 | 2.60 ppb |
2016-11-02 | 3761-012-1600 | 3.50 ppb |
2016-11-08 | 3761-012-1600 | 3.90 ppb |
2016-11-16 | 3761-012-1600 | 3.20 ppb |
2016-11-22 | 3761-012-1600 | 4.30 ppb |
2016-11-30 | 3761-012-0630 | 2.00 ppb |
2016-12-08 | 3761-012-0800 | 2.00 ppb |
2016-12-14 | 3761-012-1600 | 2.70 ppb |
2016-12-20 | 3761-012-1600 | 2.40 ppb |
2016-12-28 | 3761-012-1354 | ND |
2017-01-04 | 3761-012-1045 | 2.30 ppb |
2017-01-12 | 3761-012-1045 | 2.10 ppb |
2017-01-18 | 3761-012-1600 | 2.50 ppb |
2017-02-01 | 3761-012-1600 | 2.40 ppb |
2017-02-09 | 3761-012-0900 | 4.00 ppb |
2017-02-16 | 3761-012-1200 | 2.90 ppb |
2017-02-22 | 3761-012-1600 | 3.30 ppb |
2017-03-09 | 3761-012-0800 | 2.10 ppb |
2017-03-16 | 3761-012-0800 | ND |
2017-03-22 | 3761-012-1500 | 2.00 ppb |
2017-03-30 | 3761-012-0800 | 2.40 ppb |
2017-04-05 | 3761-012-1600 | ND |
2017-04-12 | 3761-012-1000 | ND |
2017-04-20 | 3761-012-0800 | ND |
2017-04-27 | 3761-012-0900 | ND |
2017-05-03 | 3761-012-1000 | ND |
2017-05-10 | 3761-012-1600 | 2.50 ppb |
2017-05-18 | 3761-012-0800 | ND |
2017-05-24 | 3761-012-0800 | ND |
2017-05-31 | 3761-012-1600 | ND |
2017-06-08 | 3761-012-0400 | 2.70 ppb |
2017-06-14 | 3761-012-1600 | 2.30 ppb |
2017-06-21 | 3761-012-1600 | 2.60 ppb |
2017-06-28 | 3761-012-1600 | 2.20 ppb |
2017-07-05 | 3761-012-1600 | 3.30 ppb |
2017-07-12 | 3761-012-1600 | 3.80 ppb |
2017-07-19 | 3761-012-1600 | 2.60 ppb |
2017-08-02 | 3761-012-1600 | 2.30 ppb |
2017-08-09 | 3761-012-0800 | 4.00 ppb |
2017-08-17 | 3761-012-0800 | 2.90 ppb |
2017-08-23 | 3761-012-0900 | ND |
2017-08-30 | 3761-012-1600 | 2.30 ppb |
2017-09-06 | 3761-012-1600 | ND |
2017-09-13 | 3761-012-1600 | 3.10 ppb |
2017-09-20 | 3761-012-1600 | 3.80 ppb |
2017-09-28 | 3761-012-0930 | 4.30 ppb |
2017-10-04 | 3761-012-1600 | 4.90 ppb |
2017-10-11 | 3761-012-1600 | 5.10 ppb |
2017-10-19 | 3761-012-1030 | 4.40 ppb |
2017-10-23 | 3761-012-0900 | 3.30 ppb |
2017-10-25 | 3761-012-1600 | 3.90 ppb |
2017-11-01 | 3761-012-1600 | 4.20 ppb |
2017-11-09 | 3761-012-0000 | 4.60 ppb |
2017-11-20 | 3761-012-1600 | 3.80 ppb |
2017-11-29 | 3761-012-1030 | 3.10 ppb |
2017-12-07 | 3761-012-0800 | ND |
2017-12-14 | 3761-012-0800 | 2.40 ppb |
2017-12-19 | 3761-012-1600 | 2.70 ppb |
2017-12-27 | 3761-012-0949 | 2.60 ppb |
2018-01-03 | 3761-012-1630 | 2.70 ppb |
2018-01-11 | 3761-012-0900 | 4.00 ppb |
2018-01-17 | 3761-012-0900 | 2.50 ppb |
2018-01-24 | 3761-012-1600 | 3.00 ppb |
2018-02-01 | 3761-012-0930 | 2.50 ppb |
2018-02-07 | 3761-012-0900 | 2.70 ppb |
2018-02-14 | 3761-012-1600 | 4.00 ppb |
2018-02-21 | 3761-012-1600 | 5.60 ppb |
2018-02-28 | 3761-012-1630 | 4.40 ppb |
2018-03-07 | 3761-012-0600 | 3.50 ppb |
2018-03-14 | 3761-012-0400 | 6.40 ppb |
2018-03-21 | 3761-012-1045 | 4.90 ppb |
2018-03-28 | 3761-012-1600 | 4.40 ppb |
2018-04-04 | 3761-012-1600 | 3.00 ppb |
2018-04-12 | 3761-012-1000 | 4.70 ppb |
2018-04-18 | 3761-012-0800 | 4.50 ppb |
2018-04-25 | 3761-012-1600 | 5.50 ppb |
2018-05-02 | 3761-012-0940 | 4.90 ppb |
2018-05-10 | 3761-012-0900 | 6.10 ppb |
2018-05-17 | 3761-012-0800 | 2.60 ppb |
2018-05-24 | 3761-012-0830 | 3.80 ppb |
2018-05-30 | 3761-012-1600 | 3.90 ppb |
2018-06-06 | 3761-012-1000 | 2.50 ppb |
2018-06-13 | 3761-012-1600 | ND |
2018-06-21 | 3761-012-0800 | 5.20 ppb |
2018-06-27 | 3761-012-1600 | 5.50 ppb |
2018-07-05 | 3761-012-0800 | 4.50 ppb |
2018-07-11 | 3761-012-0800 | 4.70 ppb |
2018-07-19 | 3761-012-0730 | 4.40 ppb |
2018-07-25 | 3761-012-1600 | 4.70 ppb |
2018-08-02 | 3761-012-0830 | 4.40 ppb |
2018-08-09 | 3761-012-1000 | 4.50 ppb |
2018-08-16 | 3761-012-1200 | 4.50 ppb |
2018-08-22 | 3761-012-0730 | 4.60 ppb |
2018-08-30 | 3761-012-0730 | 4.30 ppb |
2018-09-06 | 3761-012-0830 | 4.60 ppb |
2018-09-12 | 3761-012-1600 | 4.60 ppb |
2018-09-20 | 3761-012-1030 | 4.70 ppb |
2018-09-27 | 3761-012-1045 | 5.30 ppb |
2018-10-03 | 3761-012-1600 | 4.70 ppb |
2018-10-11 | 3761-012-0800 | 4.80 ppb |
2018-10-18 | 3761-012-0800 | 4.60 ppb |
2018-10-25 | 3761-012-0900 | 4.80 ppb |
2018-11-01 | 3761-012-1130 | 4.70 ppb |
2018-11-08 | 3761-012-0800 | 4.80 ppb |
2018-11-14 | 3761-012-1600 | 4.90 ppb |
2018-11-21 | 3761-012-0800 | 5.00 ppb |
2018-11-28 | 3761-012-0700 | 4.50 ppb |
2018-12-06 | 3761-012-0815 | 5.20 ppb |
2018-12-12 | 3761-012-0800 | 5.30 ppb |
2018-12-20 | 3761-012-0730 | 5.40 ppb |
2018-12-27 | 3761-012-0725 | 4.90 ppb |
2019-01-03 | 3761-012-0745 | 4.50 ppb |
2019-01-10 | 3761-012-0800 | 5.80 ppb |
2019-01-17 | 3761-012-0715 | 5.50 ppb |
2019-01-24 | 3761-012-0815 | 5.60 ppb |
2019-01-31 | 3761-012-0745 | 5.30 ppb |
2019-02-07 | 3761-012-0745 | 6.10 ppb |
2019-02-14 | 3761-012-0000 | 5.80 ppb |
2019-02-21 | 3761-012-0845 | 6.70 ppb |
2019-02-28 | 3761-012-0915 | 4.60 ppb |
2019-03-05 | 3761-012-0000 | 5.80 ppb |
2019-03-12 | 3761-012-0800 | 5.10 ppb |
2019-03-19 | 3761-012-0715 | 5.10 ppb |
2019-03-27 | 3761-012-0730 | 5.90 ppb |
2019-04-02 | 3761-012-0730 | 5.10 ppb |
2019-04-09 | 3761-012-0730 | 4.70 ppb |
2019-04-16 | 3761-012-0700 | 4.90 ppb |
2019-04-23 | 3761-012-0700 | 5.30 ppb |
2019-04-30 | 3761-012-0700 | 5.20 ppb |
2019-05-07 | 3761-012-0745 | 5.10 ppb |
2019-05-14 | 3761-012-0715 | 5.10 ppb |
2019-05-21 | 3761-012-0730 | 5.30 ppb |
2019-05-28 | 3761-012-0700 | 5.80 ppb |
2019-06-04 | 3761-012-0000 | 5.20 ppb |
2019-06-11 | 3761-012-0700 | 5.10 ppb |
2019-06-18 | 3761-012-0700 | 5.00 ppb |
2019-06-25 | 3761-012-0700 | 5.50 ppb |
2019-07-16 | 3761-012-0700 | 5.20 ppb |
2019-07-23 | 3761-012-0700 | 4.90 ppb |
2019-07-30 | 3761-012-0725 | 5.30 ppb |
2019-08-06 | 3761-012-0740 | 5.30 ppb |
2019-08-13 | 3761-012-0800 | 5.10 ppb |
2019-08-20 | 3761-012-0820 | 5.00 ppb |
2019-08-27 | 3761-012-0805 | 5.20 ppb |
2019-09-03 | 3761-012-0000 | 5.60 ppb |
2019-09-10 | 3761-012-0000 | 5.70 ppb |
2019-09-17 | 3761-012-0000 | 6.00 ppb |
2019-09-24 | 3761-012-0815 | 4.70 ppb |
2019-10-01 | 3761-012-0800 | 5.10 ppb |
2019-10-08 | 3761-012-0845 | 4.60 ppb |
2019-10-14 | 3761-012-0900 | 4.90 ppb |
2019-10-22 | 3761-012-0745 | 5.40 ppb |
2019-10-29 | 3761-012-1045 | 4.60 ppb |
2019-11-05 | 3761-012-0810 | 4.70 ppb |
2019-11-12 | 3761-012-0834 | 5.30 ppb |
2019-11-19 | 3761-012-0815 | 4.80 ppb |
2019-11-26 | 3761-012-0800 | 5.80 ppb |
2019-12-03 | 3761-012-0000 | 5.40 ppb |
2019-12-10 | 3761-012-0815 | 5.00 ppb |
2019-12-17 | 3761-012-0800 | 5.10 ppb |
2019-12-23 | 3761-012-0804 | 4.70 ppb |
2019-12-30 | 3761-012-0800 | 5.90 ppb |