Arsenic
Virgin Valley 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 |
---|---|---|---|---|
2014 | 5.74 ppb | 21 | 21 | 2.50 ppb - 24.0 ppb |
2015 | 4.08 ppb | 26 | 24 | ND - 9.00 ppb |
2016 | 4.18 ppb | 46 | 36 | ND - 14.0 ppb |
2017 | 5.22 ppb | 53 | 48 | ND - 9.40 ppb |
2018 | 5.34 ppb | 61 | 55 | ND - 12.0 ppb |
2019 | 4.93 ppb | 83 | 62 | ND - 18.0 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 |
---|---|---|
2014-01-07 | 1401169-001 | 2.80 ppb |
2014-01-07 | 1401169-002 | 6.00 ppb |
2014-01-07 | 1401169-003 | 7.90 ppb |
2014-04-02 | 1404130-001 | 2.50 ppb |
2014-04-02 | 1404130-002 | 6.70 ppb |
2014-04-02 | 1404130-003 | 6.50 ppb |
2014-05-06 | 1405180-001 | 24.0 ppb |
2014-05-14 | 1405504-001 | 4.20 ppb |
2014-07-16 | 1407469-002 | 2.70 ppb |
2014-07-16 | 1407469-003 | 4.40 ppb |
2014-07-16 | 1407469-004 | 4.40 ppb |
2014-07-16 | 1407469-005 | 4.00 ppb |
2014-07-16 | 1407469-006 | 8.10 ppb |
2014-07-16 | 1407469-001 | 5.50 ppb |
2014-08-06 | 1408570-001 | 4.40 ppb |
2014-08-13 | 1408570-002 | 5.40 ppb |
2014-10-01 | 1410078-001 | 2.50 ppb |
2014-10-01 | 1410078-002 | 4.60 ppb |
2014-10-01 | 1410078-003 | 6.00 ppb |
2014-12-09 | 1412577-001 | 3.70 ppb |
2014-12-17 | 1412577-002 | 4.20 ppb |
2015-01-08 | 1501488-001 | 2.70 ppb |
2015-01-08 | 1501488-002 | 5.60 ppb |
2015-01-08 | 1501488-003 | 9.00 ppb |
2015-02-17 | 1502515-001 | 3.20 ppb |
2015-02-17 | 1502515-002 | 6.00 ppb |
2015-02-19 | 1503122-001 | 3.70 ppb |
2015-02-19 | 1503122-002 | 3.60 ppb |
2015-03-19 | 1504113-001 | 2.70 ppb |
2015-03-19 | 1504113-002 | 7.10 ppb |
2015-03-19 | 1504113-003 | 4.00 ppb |
2015-05-06 | 1505168-001 | 2.00 ppb |
2015-05-06 | 1505168-002 | 2.90 ppb |
2015-05-06 | 1505168-003 | 6.80 ppb |
2015-07-01 | 1507065-001 | ND |
2015-07-01 | 1507065-002 | 3.20 ppb |
2015-07-01 | 1507065-003 | 6.10 ppb |
2015-07-15 | 1507436-002 | 2.40 ppb |
2015-07-15 | 1507436-003 | 1.60 ppb |
2015-07-15 | 15071436-004 | 4.10 ppb |
2015-07-15 | 1507436-005 | ND |
2015-07-15 | 1507436-006 | 6.60 ppb |
2015-07-15 | 1507436-001 | 4.70 ppb |
2015-10-22 | 1511165-001 | 1.60 ppb |
2015-10-22 | 1511165-002 | 6.10 ppb |
2015-10-22 | 1511165-004 | 7.00 ppb |
2015-10-28 | 1511165-003 | 3.40 ppb |
2016-01-05 | 1601082-002 | 3.80 ppb |
2016-01-06 | 1601082-001 | 2.40 ppb |
2016-01-06 | 1601082-003 | 14.0 ppb |
2016-02-03 | 1602077-001 | ND |
2016-03-16 | 1603470-001 | 3.50 ppb |
2016-03-16 | 1603470-002 | 7.90 ppb |
2016-04-19 | 1604498-001 | ND |
2016-04-19 | 1604498-002 | 3.80 ppb |
2016-04-19 | 1604498-003 | 6.90 ppb |
2016-05-23 | 1606017-001 | ND |
2016-05-23 | 1606017-002 | 3.90 ppb |
2016-05-23 | 1606017-003 | 6.10 ppb |
2016-06-01 | 1606016-001 | 4.50 ppb |
2016-06-01 | 1606016-002 | 4.10 ppb |
2016-07-06 | 1607091-001 | 3.70 ppb |
2016-07-06 | 1607091-002 | 4.50 ppb |
2016-07-06 | 1607091-003 | 7.30 ppb |
2016-07-20 | 1607586-002 | 2.10 ppb |
2016-07-20 | 1607586-003 | ND |
2016-07-20 | 1607586-004 | 4.50 ppb |
2016-07-20 | 1607586-005 | 4.20 ppb |
2016-07-20 | 1607586-006 | 8.00 ppb |
2016-07-20 | 1607586-001 | 4.90 ppb |
2016-07-29 | 1608090-001 | 4.60 ppb |
2016-07-29 | 1608090-002 | ND |
2016-07-29 | 1608090-003 | 4.80 ppb |
2016-07-29 | 1608090-004 | 4.00 ppb |
2016-07-29 | 1608090-005 | 7.80 ppb |
2016-08-26 | 1609137-001 | 4.10 ppb |
2016-08-26 | 1609137-002 | 5.00 ppb |
2016-08-26 | 1609137-003 | 6.80 ppb |
2016-08-26 | 1609137-004 | 5.60 ppb |
2016-08-26 | 1609137-005 | 7.60 ppb |
2016-09-29 | 1610128-001 | 1.70 ppb |
2016-09-29 | 1610128-002 | 7.30 ppb |
2016-09-29 | 1610128-004 | 8.10 ppb |
2016-09-30 | 1610128-003 | 4.00 ppb |
2016-10-14 | 1610588-001 | ND |
2016-10-14 | 1610588-002 | 5.90 ppb |
2016-10-14 | 1610588-003 | ND |
2016-11-15 | 1611498-001 | ND |
2016-11-15 | 1611498-002 | ND |
2016-11-16 | 1611498-003 | 7.10 ppb |
2016-12-19 | 1612649-003 | 6.00 ppb |
2016-12-20 | 1612649-001 | ND |
2016-12-21 | 1612649-002 | 1.70 ppb |
2017-01-12 | 1701383-001 | 2.90 ppb |
2017-01-12 | 1701383-002 | 4.50 ppb |
2017-01-12 | 1701383-003 | 8.80 ppb |
2017-02-10 | 1702367-001 | 3.20 ppb |
2017-02-10 | 1702367-002 | 4.50 ppb |
2017-02-10 | 1702367-003 | 7.10 ppb |
2017-02-28 | 1703012-001 | 3.80 ppb |
2017-02-28 | 1703012-002 | 5.60 ppb |
2017-03-30 | 1704090-001 | 4.70 ppb |
2017-03-30 | 1704090-003 | 6.60 ppb |
2017-03-31 | 1704090-002 | 4.90 ppb |
2017-04-18 | 1704497-002 | 6.00 ppb |
2017-04-19 | 1704497-001 | 4.80 ppb |
2017-04-19 | 1704497-003 | 6.70 ppb |
2017-05-12 | 1705473-001 | 4.80 ppb |
2017-05-12 | 1705473-002 | 6.00 ppb |
2017-05-12 | 1705473-003 | 8.50 ppb |
2017-06-02 | 1706174-001 | ND |
2017-06-02 | 1706174-002 | ND |
2017-06-02 | 1706174-003 | 6.80 ppb |
2017-06-02 | 1706174-004 | 4.60 ppb |
2017-06-29 | 1707026-001 | 4.60 ppb |
2017-07-19 | 1707518-001 | 4.70 ppb |
2017-07-19 | 1707521-002 | 4.60 ppb |
2017-07-19 | 1707518-002 | ND |
2017-07-19 | 1707521-003 | 2.00 ppb |
2017-07-19 | 1707518-003 | 6.40 ppb |
2017-07-19 | 1707521-004 | 7.30 ppb |
2017-07-19 | 1707518-004 | 5.60 ppb |
2017-07-19 | 1707521-005 | 5.70 ppb |
2017-07-19 | 1707518-005 | 8.80 ppb |
2017-07-19 | 1707521-006 | 9.40 ppb |
2017-07-19 | 1707518-006 | 5.10 ppb |
2017-07-19 | 1707521-001 | 4.80 ppb |
2017-08-15 | 1708518-001 | 4.30 ppb |
2017-08-15 | 1708518-002 | ND |
2017-08-15 | 1708518-003 | 7.70 ppb |
2017-08-15 | 1708518-004 | 5.40 ppb |
2017-08-15 | 1708518-005 | 5.90 ppb |
2017-08-15 | 1708518-006 | 5.30 ppb |
2017-09-18 | 1709562-004 | 7.30 ppb |
2017-09-19 | 1709562-002 | 9.40 ppb |
2017-09-19 | 1709562-003 | 5.90 ppb |
2017-09-20 | 1709562-001 | ND |
2017-10-04 | 1710113-001 | 4.70 ppb |
2017-10-12 | 1710590-001 | 5.10 ppb |
2017-10-12 | 1710590-002 | 6.30 ppb |
2017-10-12 | 1710590-004 | 5.00 ppb |
2017-10-13 | 1710590-003 | 6.40 ppb |
2017-12-06 | 1712116-001 | 5.00 ppb |
2017-12-06 | 1712116-002 | 6.00 ppb |
2017-12-06 | 1712116-003 | 7.50 ppb |
2017-12-06 | 1712116-004 | 5.70 ppb |
2018-01-11 | 1801524-001 | 5.10 ppb |
2018-01-11 | 1801524-002 | 6.10 ppb |
2018-01-11 | 1801524-003 | 5.10 ppb |
2018-01-11 | 1801524-004 | 5.20 ppb |
2018-02-06 | 1802217-001 | 5.30 ppb |
2018-02-06 | 1802217-003 | 5.80 ppb |
2018-02-06 | 1802217-004 | 5.30 ppb |
2018-02-07 | 1802217-002 | 5.50 ppb |
2018-03-07 | 1803224-001 | 6.30 ppb |
2018-03-07 | 1803224-002 | 7.10 ppb |
2018-03-07 | 1803224-003 | 4.80 ppb |
2018-03-07 | 1803224-004 | 4.00 ppb |
2018-04-17 | 1804599-001 | 4.80 ppb |
2018-04-17 | 1804599-002 | 5.90 ppb |
2018-04-17 | 1804599-003 | ND |
2018-04-26 | 1805064-001 | 2.50 ppb |
2018-05-15 | 1805548-003 | 4.90 ppb |
2018-05-16 | 1805548-001 | 4.90 ppb |
2018-05-16 | 1805548-002 | 4.70 ppb |
2018-05-16 | 1805548-004 | 4.70 ppb |
2018-06-05 | 1806168-001 | 5.30 ppb |
2018-06-05 | 1806168-002 | 6.40 ppb |
2018-06-05 | 1806168-003 | 4.70 ppb |
2018-06-05 | 1806168-004 | 7.20 ppb |
2018-06-20 | 1806612-001 | 5.30 ppb |
2018-06-20 | 1806612-002 | 5.10 ppb |
2018-06-20 | 1806612-003 | 6.70 ppb |
2018-07-05 | 1807099-001 | 5.90 ppb |
2018-07-17 | 1807610-001 | 3.60 ppb |
2018-07-17 | 1807610-002 | 6.60 ppb |
2018-07-17 | 1807610-005 | 5.40 ppb |
2018-07-17 | 1807610-006 | ND |
2018-07-18 | 1807610-003 | ND |
2018-07-18 | 1807610-004 | 3.50 ppb |
2018-07-18 | 1807612-001 | 3.00 ppb |
2018-07-18 | 1807612-002 | ND |
2018-08-14 | 1808499-001 | 5.50 ppb |
2018-08-14 | 1808499-002 | 8.10 ppb |
2018-08-14 | 1808499-003 | 4.60 ppb |
2018-08-14 | 1808499-004 | 5.80 ppb |
2018-08-14 | 1808499-005 | 7.80 ppb |
2018-08-14 | 1808499-006 | 5.80 ppb |
2018-09-19 | 18090629-001 | 12.0 ppb |
2018-09-25 | 18100132-002 | 7.20 ppb |
2018-09-25 | 18100132-003 | ND |
2018-09-25 | 18100132-004 | ND |
2018-09-25 | 18100132-005 | 8.50 ppb |
2018-09-26 | 18100132-001 | 5.60 ppb |
2018-10-16 | 18100591-001 | 4.50 ppb |
2018-10-16 | 18100591-002 | 9.10 ppb |
2018-10-16 | 18100591-003 | 4.80 ppb |
2018-10-16 | 18100591-004 | 8.80 ppb |
2018-10-30 | 18110181-002 | 9.60 ppb |
2018-11-06 | 18110181-001 | 4.70 ppb |
2018-11-06 | 18110181-003 | 5.50 ppb |
2018-11-06 | 18110181-004 | 7.80 ppb |
2018-11-16 | 18110528-001 | 7.70 ppb |
2018-12-04 | 18120132-002 | 5.20 ppb |
2018-12-05 | 18120132-001 | 9.70 ppb |
2018-12-05 | 18120132-003 | 7.80 ppb |
2018-12-18 | 18120573-001 | 2.70 ppb |
2019-01-11 | 19010459-001 | 2.40 ppb |
2019-01-11 | 19010459-002 | 5.60 ppb |
2019-01-11 | 19010459-003 | 11.0 ppb |
2019-02-20 | 19020460-001 | 1.90 ppb |
2019-02-20 | 19020460-002 | 5.30 ppb |
2019-03-19 | 19030571-001 | 7.10 ppb |
2019-03-19 | 19030573-001 | 2.00 ppb |
2019-03-19 | 19030573-002 | 5.20 ppb |
2019-04-02 | 19040108-001 | 2.10 ppb |
2019-04-02 | 19040108-002 | 6.40 ppb |
2019-05-13 | 19050441-002 | 4.80 ppb |
2019-05-14 | 19050441-001 | 2.50 ppb |
2019-05-14 | 19050441-003 | 8.50 ppb |
2019-05-14 | 19050441-004 | 5.50 ppb |
2019-06-04 | 19060135-001 | 3.80 ppb |
2019-06-04 | 19060135-002 | ND |
2019-06-04 | 19060135-003 | 2.10 ppb |
2019-06-04 | 19060135-004 | 8.20 ppb |
2019-06-04 | 19060135-005 | 5.40 ppb |
2019-06-11 | 19060633-001 | 3.90 ppb |
2019-06-11 | 19060636-001 | 5.50 ppb |
2019-06-11 | 19060636-002 | ND |
2019-06-19 | 19060631-001 | 6.90 ppb |
2019-06-19 | 19060631-002 | 4.20 ppb |
2019-06-19 | 19060634-001 | 7.00 ppb |
2019-06-19 | 19060634-002 | ND |
2019-06-26 | 19070009-002 | ND |
2019-06-26 | 19070009-01 | 8.50 ppb |
2019-07-01 | 19070010-001 | 9.20 ppb |
2019-07-01 | 19070010-002 | ND |
2019-07-01 | 19070015-001 | 7.00 ppb |
2019-07-11 | 19070633-001 | 8.80 ppb |
2019-07-11 | 19070633-002 | ND |
2019-07-16 | 19070635-001 | 2.00 ppb |
2019-07-16 | 19070635-002 | 7.90 ppb |
2019-07-16 | 19070635-003 | 5.50 ppb |
2019-07-16 | 19070636-001 | 8.70 ppb |
2019-07-16 | 19070636-002 | ND |
2019-07-17 | 19070631-001 | 5.40 ppb |
2019-07-17 | 19070638-001 | ND |
2019-07-17 | 19070638-002 | 5.10 ppb |
2019-07-24 | 19080216-001 | 8.10 ppb |
2019-07-24 | 19080216-002 | ND |
2019-08-02 | 19080214-001 | 8.90 ppb |
2019-08-02 | 19080214-002 | ND |
2019-08-05 | 19080212-005 | 6.20 ppb |
2019-08-06 | 19080212-001 | 10.00 ppb |
2019-08-06 | 19080212-002 | ND |
2019-08-06 | 19080212-004 | 6.00 ppb |
2019-08-06 | 19080212-006 | 5.00 ppb |
2019-08-15 | 19080761-001 | 10.00 ppb |
2019-08-15 | 19080761-002 | ND |
2019-08-20 | 19080764-001 | 9.90 ppb |
2019-08-20 | 19080764-002 | ND |
2019-08-30 | 19090103-001 | 7.30 ppb |
2019-08-30 | 19090103-002 | ND |
2019-09-04 | 19090105-001 | 8.80 ppb |
2019-09-04 | 19090105-002 | ND |
2019-09-15 | 19090631-001 | 7.90 ppb |
2019-09-15 | 19090631-002 | ND |
2019-09-16 | 19090631-003 | 2.80 ppb |
2019-09-16 | 19090631-004 | 6.80 ppb |
2019-09-16 | 19090631-005 | 18.0 ppb |
2019-09-16 | 19090631-006 | 7.90 ppb |
2019-09-16 | 19090631-007 | 4.70 ppb |
2019-09-18 | 19090629-001 | 8.60 ppb |
2019-09-18 | 19090629-002 | ND |
2019-09-25 | 19090892-001 | 14.0 ppb |
2019-10-09 | 19100557-001 | 7.20 ppb |
2019-10-09 | 19100557-002 | ND |
2019-10-09 | 19100557-003 | 2.60 ppb |
2019-10-09 | 19100557-004 | 8.30 ppb |
2019-10-09 | 19100557-005 | 4.20 ppb |
2019-11-06 | 19110583-001 | 10.00 ppb |
2019-11-19 | 19110583-002 | 7.30 ppb |
2019-11-21 | 19120109-001 | 7.60 ppb |
2019-11-21 | 19120109-002 | ND |
2019-12-04 | 19120111-001 | 6.90 ppb |
2019-12-04 | 19120111-002 | ND |
2019-12-09 | 19120581-001 | ND |
2019-12-09 | 19120581-002 | 5.50 ppb |
2019-12-11 | 19120539-001 | 6.90 ppb |
2019-12-16 | 19120539-002 | 6.10 ppb |