Arsenic
Rosamond CSD
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 | 7.85 ppb | 30 | 29 | ND - 11.0 ppb |
2015 | 6.54 ppb | 25 | 25 | 5.10 ppb - 8.60 ppb |
2016 | 7.28 ppb | 62 | 62 | 2.20 ppb - 13.0 ppb |
2017 | 7.30 ppb | 1 | 1 | 7.30 ppb |
2018 | 7.09 ppb | 61 | 61 | 4.70 ppb - 12.0 ppb |
2019 | 8.44 ppb | 52 | 52 | 5.70 ppb - 12.0 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 |
---|---|---|
2014-02-18 | 3761-002-1000 | 6.60 ppb |
2014-05-06 | 3761-002-1030 | 6.60 ppb |
2014-05-06 | 3761-006-0905 | 8.10 ppb |
2014-05-06 | 3761-009-1045 | 9.20 ppb |
2014-05-06 | 3761-018-1050 | 7.40 ppb |
2014-05-13 | 3761-018-0950 | 8.50 ppb |
2014-05-20 | 3761-018-1035 | 8.20 ppb |
2014-06-03 | 3761-018-1010 | 7.90 ppb |
2014-06-10 | 3761-018-1030 | 8.60 ppb |
2014-06-17 | 3761-018-1030 | 8.60 ppb |
2014-07-01 | 3761-018-1020 | 8.50 ppb |
2014-07-08 | 3761-018-0935 | 8.70 ppb |
2014-07-15 | 3761-018-0915 | 5.30 ppb |
2014-07-22 | 3761-018-1015 | 8.00 ppb |
2014-08-05 | 3761-018-1025 | 7.80 ppb |
2014-08-12 | 3761-018-1040 | 8.80 ppb |
2014-08-19 | 3761-002-1025 | 6.80 ppb |
2014-08-19 | 3761-006-0920 | 9.10 ppb |
2014-08-19 | 3761-009-1040 | 11.0 ppb |
2014-08-19 | 3761-018-1045 | 9.10 ppb |
2014-08-26 | 3761-018-1045 | 8.90 ppb |
2014-09-02 | 3761-018-0915 | 8.30 ppb |
2014-09-07 | 3761-018-1035 | 8.80 ppb |
2014-09-09 | 3761-018-1155 | ND |
2014-09-16 | 3761-018-1050 | 8.40 ppb |
2014-09-23 | 3761-018-1015 | 8.40 ppb |
2014-09-30 | 3761-018-0910 | 8.70 ppb |
2014-10-14 | 3761-018-1010 | 8.00 ppb |
2014-11-18 | 3761-002-1040 | 6.20 ppb |
2014-11-18 | 3761-006-0950 | 7.10 ppb |
2015-02-17 | 3761-002-1020 | 5.40 ppb |
2015-05-19 | 3761-002-1020 | 6.10 ppb |
2015-05-19 | 3761-006-0905 | 8.10 ppb |
2015-07-21 | 3761-002-1054 | 6.70 ppb |
2015-07-21 | 3761-006-0910 | 8.30 ppb |
2015-07-28 | 3761-009-1040 | 8.10 ppb |
2015-08-18 | 3761-002-0950 | 6.80 ppb |
2015-08-18 | 3761-006-1035 | 8.60 ppb |
2015-08-18 | 3761-009-0930 | 8.40 ppb |
2015-09-22 | 3761-018-1015 | 6.10 ppb |
2015-09-29 | 3761-018-1030 | 6.60 ppb |
2015-10-06 | 3761-018-1030 | 8.00 ppb |
2015-10-13 | 3761-018-0945 | 6.10 ppb |
2015-10-20 | 3761-018-1110 | 6.30 ppb |
2015-10-27 | 3761-018-0930 | 5.10 ppb |
2015-11-03 | 3761-018-0925 | 5.80 ppb |
2015-11-10 | 3761-018-0935 | 6.10 ppb |
2015-11-17 | 3761-002-0930 | 6.00 ppb |
2015-11-17 | 3761-018-0940 | 5.50 ppb |
2015-11-24 | 3761-018-1025 | 5.70 ppb |
2015-12-01 | 3761-018-1035 | 5.80 ppb |
2015-12-08 | 3761-018-0905 | 5.70 ppb |
2015-12-15 | 3761-018-0930 | 6.60 ppb |
2015-12-22 | 3761-018-0900 | 6.00 ppb |
2015-12-29 | 3761-018-0945 | 5.50 ppb |
2016-01-05 | 3761-018-1035 | 5.90 ppb |
2016-01-12 | 3761-018-1040 | 5.70 ppb |
2016-01-19 | 3761-018-0830 | 6.20 ppb |
2016-02-09 | 3761-018-1040 | 7.30 ppb |
2016-02-16 | 3761-018-0950 | 7.10 ppb |
2016-02-23 | 3761-018-0930 | 7.00 ppb |
2016-03-01 | 3761-018-0940 | 6.60 ppb |
2016-03-08 | 3761-002-1105 | 6.90 ppb |
2016-03-08 | 3761-006-1025 | 8.00 ppb |
2016-03-08 | 3761-018-1115 | 6.80 ppb |
2016-03-15 | 3761-018-0925 | 6.40 ppb |
2016-03-22 | 3761-018-0930 | 6.90 ppb |
2016-03-29 | 3761-018-1045 | 6.90 ppb |
2016-04-05 | 3761-018-1045 | 6.40 ppb |
2016-04-12 | 3761-018-0930 | 7.00 ppb |
2016-04-19 | 3761-018-0940 | 5.30 ppb |
2016-04-26 | 3761-018-0930 | 6.10 ppb |
2016-05-03 | 3761-018-0925 | 6.80 ppb |
2016-05-10 | 3761-018-1050 | 6.80 ppb |
2016-05-17 | 3761-018-0900 | 6.60 ppb |
2016-05-24 | 3761-018-1000 | 6.20 ppb |
2016-05-31 | 3761-018-0940 | 6.10 ppb |
2016-06-07 | 3761-002-1000 | 9.90 ppb |
2016-06-07 | 3761-006-1045 | 12.0 ppb |
2016-06-07 | 3761-018-1015 | 8.00 ppb |
2016-06-14 | 3761-009-0920 | 8.30 ppb |
2016-06-14 | 3761-018-0925 | 7.00 ppb |
2016-06-21 | 3761-018-0900 | 7.70 ppb |
2016-06-28 | 3761-018-0920 | 10.00 ppb |
2016-07-05 | 3761-018-0930 | 7.10 ppb |
2016-07-12 | 3761-002-1040 | 6.00 ppb |
2016-07-12 | 3761-006-0935 | 7.80 ppb |
2016-07-12 | 3761-018-1050 | 6.10 ppb |
2016-07-19 | 3761-018-0830 | 7.20 ppb |
2016-07-26 | 3761-018-0940 | 8.30 ppb |
2016-08-02 | 3761-018-0935 | 8.60 ppb |
2016-08-09 | 3761-018-0955 | 8.30 ppb |
2016-08-16 | 3761-018-1000 | 9.30 ppb |
2016-08-23 | 3761-018-0930 | 7.70 ppb |
2016-08-30 | 3761-018-0930 | 8.00 ppb |
2016-09-06 | 3761-002-0950 | 8.30 ppb |
2016-09-06 | 3761-006-1045 | 9.70 ppb |
2016-09-06 | 3761-009-1005 | 13.0 ppb |
2016-09-06 | 3761-018-1145 | 6.20 ppb |
2016-09-13 | 3761-018-1135 | 6.30 ppb |
2016-09-20 | 3761-018-1000 | 5.00 ppb |
2016-09-27 | 3761-018-0935 | 7.60 ppb |
2016-10-04 | 3761-018-0930 | 6.50 ppb |
2016-10-11 | 3761-018-1000 | 6.80 ppb |
2016-10-18 | 3761-018-0930 | 6.40 ppb |
2016-10-25 | 3761-018-0915 | 7.50 ppb |
2016-11-01 | 3761-018-0930 | 5.90 ppb |
2016-11-08 | 3761-018-0910 | 7.40 ppb |
2016-11-15 | 3761-018-0930 | 7.10 ppb |
2016-11-22 | 3761-018-0915 | 7.00 ppb |
2016-11-29 | 3761-002-0955 | 7.40 ppb |
2016-11-29 | 3761-006-1115 | 8.70 ppb |
2016-11-29 | 3761-018-0950 | 7.00 ppb |
2016-12-06 | 3761-018-1000 | 6.40 ppb |
2016-12-13 | 3761-018-1002 | 10.00 ppb |
2016-12-20 | 3761-018-0945 | 6.40 ppb |
2016-12-27 | 3761-018-0945 | 2.20 ppb |
2017-06-01 | 7.30 ppb* | |
2018-01-02 | 3761-018-0930 | 5.60 ppb |
2018-01-09 | 3761-018-0930 | 6.40 ppb |
2018-01-16 | 3761-018-0930 | 6.10 ppb |
2018-01-23 | 3761-018-0930 | 6.50 ppb |
2018-01-30 | 3761-018-0940 | 6.90 ppb |
2018-02-06 | 3761-018-0930 | 6.50 ppb |
2018-02-13 | 3761-018-0930 | 6.20 ppb |
2018-02-20 | 3761-018-0930 | 4.70 ppb |
2018-02-27 | 3761-018-0930 | 6.20 ppb |
2018-03-06 | 3761-002-0940 | 5.60 ppb |
2018-03-06 | 3761-018-0955 | 5.80 ppb |
2018-03-13 | 3761-018-0930 | 5.60 ppb |
2018-03-20 | 3761-018-0930 | 5.70 ppb |
2018-03-27 | 3761-018-0930 | 5.80 ppb |
2018-04-03 | 3761-018-0930 | 5.50 ppb |
2018-04-10 | 3761-018-0930 | 6.80 ppb |
2018-04-17 | 3761-018-0930 | 6.30 ppb |
2018-04-24 | 3761-018-0930 | 6.40 ppb |
2018-05-01 | 3761-018-0930 | 6.10 ppb |
2018-05-08 | 3761-018-0930 | 6.40 ppb |
2018-05-22 | 3761-002-0900 | 5.90 ppb |
2018-05-22 | 3761-006-1045 | 8.70 ppb |
2018-05-22 | 3761-009-0935 | 7.40 ppb |
2018-05-22 | 3761-018-0920 | 5.60 ppb |
2018-05-29 | 3761-002-0920 | 6.40 ppb |
2018-05-29 | 3761-006-1045 | 9.00 ppb |
2018-05-29 | 3761-009-0940 | 8.30 ppb |
2018-05-29 | 3761-018-0935 | 6.30 ppb |
2018-06-05 | 3761-018-0930 | 6.30 ppb |
2018-06-12 | 3761-018-0930 | 4.70 ppb |
2018-06-19 | 3761-018-0930 | 6.80 ppb |
2018-06-26 | 3761-018-0910 | 7.00 ppb |
2018-07-17 | 3761-018-0940 | 5.50 ppb |
2018-07-24 | 3761-018-0840 | 6.90 ppb |
2018-07-31 | 3761-018-0930 | 7.60 ppb |
2018-08-07 | 3761-018-0930 | 7.40 ppb |
2018-08-14 | 3761-002-0915 | 7.90 ppb |
2018-08-14 | 3761-006-1025 | 10.00 ppb |
2018-08-14 | 3761-009-0935 | 12.0 ppb |
2018-08-14 | 3761-018-0930 | 7.50 ppb |
2018-08-21 | 3761-018-0930 | 7.70 ppb |
2018-08-28 | 3761-018-0930 | 7.50 ppb |
2018-09-11 | 3761-018-0930 | 7.30 ppb |
2018-09-18 | 3761-018-1045 | 7.30 ppb |
2018-09-25 | 3761-018-0930 | 7.40 ppb |
2018-10-02 | 3761-018-0855 | 7.10 ppb |
2018-10-09 | 3761-018-0930 | 7.40 ppb |
2018-10-16 | 3761-018-0930 | 7.80 ppb |
2018-10-23 | 3761-018-0930 | 7.70 ppb |
2018-10-30 | 3761-018-0930 | 7.80 ppb |
2018-11-06 | 3761-018-0935 | 7.90 ppb |
2018-11-13 | 3761-018-0930 | 7.70 ppb |
2018-11-20 | 3761-002-0930 | 7.40 ppb |
2018-11-20 | 3761-006-1055 | 9.40 ppb |
2018-11-20 | 3761-009-0945 | 9.70 ppb |
2018-11-20 | 3761-018-0950 | 7.50 ppb |
2018-11-27 | 3761-018-0930 | 7.90 ppb |
2018-12-04 | 3761-018-0930 | 7.70 ppb |
2018-12-11 | 3761-018-0930 | 8.50 ppb |
2018-12-18 | 3761-018-0930 | 8.10 ppb |
2018-12-26 | 3761-018-0930 | 7.60 ppb |
2019-01-02 | 3761-018-0930 | 7.60 ppb |
2019-01-08 | 3761-018-0935 | 7.40 ppb |
2019-01-15 | 3761-018-0930 | 7.60 ppb |
2019-01-22 | 3761-018-0930 | 7.30 ppb |
2019-02-12 | 3761-018-0930 | 7.60 ppb |
2019-02-19 | 3761-018-0930 | 7.80 ppb |
2019-02-26 | 3761-018-0930 | 8.00 ppb |
2019-03-05 | 3761-018-0930 | 7.70 ppb |
2019-03-12 | 3761-018-0930 | 7.90 ppb |
2019-03-19 | 3761-002-1030 | 7.40 ppb |
2019-03-19 | 3761-006-1010 | 11.0 ppb |
2019-03-19 | 3761-009-1045 | 8.00 ppb |
2019-03-19 | 3761-018-1050 | 7.50 ppb |
2019-03-26 | 3761-018-0930 | 7.70 ppb |
2019-04-02 | 3761-018-0930 | 7.50 ppb |
2019-04-30 | 3761-018-0930 | 7.80 ppb |
2019-05-07 | 3761-018-0930 | 5.70 ppb |
2019-05-14 | 3761-018-0930 | 8.10 ppb |
2019-05-21 | 3761-018-0930 | 7.70 ppb |
2019-05-28 | 3761-002-0920 | 8.10 ppb |
2019-05-28 | 3761-006-1035 | 10.00 ppb |
2019-05-28 | 3761-009-0945 | 12.0 ppb |
2019-05-28 | 3761-018-0935 | 7.80 ppb |
2019-06-04 | 3761-018-0940 | 7.70 ppb |
2019-06-11 | 3761-018-0930 | 7.70 ppb |
2019-06-18 | 3761-018-0930 | 7.20 ppb |
2019-06-25 | 3761-018-0930 | 7.10 ppb |
2019-07-02 | 3761-018-1040 | 9.60 ppb |
2019-07-09 | 3761-018-0900 | 7.30 ppb |
2019-07-16 | 3761-018-0930 | 8.20 ppb |
2019-07-23 | 3761-018-0915 | 8.80 ppb |
2019-07-30 | 3761-018-0935 | 8.70 ppb |
2019-08-06 | 3761-018-0930 | 8.30 ppb |
2019-08-13 | 3761-002-0955 | 7.10 ppb |
2019-08-13 | 3761-009-0935 | 11.0 ppb |
2019-08-13 | 3761-018-0930 | 8.60 ppb |
2019-08-20 | 3761-018-0940 | 8.50 ppb |
2019-08-27 | 3761-018-0935 | 8.80 ppb |
2019-09-03 | 3761-018-0945 | 8.80 ppb |
2019-09-10 | 3761-018-0930 | 9.60 ppb |
2019-09-17 | 3761-018-0940 | 9.10 ppb |
2019-09-24 | 3761-018-0940 | 9.40 ppb |
2019-10-01 | 3761-018-0920 | 9.00 ppb |
2019-10-08 | 3761-018-0945 | 9.60 ppb |
2019-10-15 | 3761-018-0900 | 9.50 ppb |
2019-10-22 | 3761-018-0930 | 9.20 ppb |
2019-10-29 | 3761-018-0940 | 9.20 ppb |
2019-11-05 | 3761-018-0940 | 9.00 ppb |
2019-11-12 | 3761-018-0935 | 9.40 ppb |
2019-11-19 | 3761-002-1005 | 7.50 ppb |
2019-11-19 | 3761-009-0940 | 11.0 ppb |
2019-11-19 | 3761-018-0930 | 8.70 ppb |
* Sample result is taken from the system's CCR report.