Arsenic
Lakewood Water Department
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 | 2.75 ppb | 50 | 50 | 2.05 ppb - 7.30 ppb |
2015 | 2.78 ppb | 41 | 41 | 2.27 ppb - 6.50 ppb |
2016 | 3.71 ppb | 32 | 32 | 2.52 ppb - 7.40 ppb |
2017 | 5.07 ppb | 47 | 47 | 2.50 ppb - 8.60 ppb |
2018 | 6.23 ppb | 54 | 54 | 3.80 ppb - 7.49 ppb |
2019 | 6.57 ppb | 28 | 28 | 6.00 ppb - 8.20 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 |
---|---|---|
2014-01-02 | 9469-053-0838 | 2.38 ppb |
2014-01-08 | 9469-053-0732 | 2.71 ppb |
2014-01-15 | 9469-053-0902 | 2.56 ppb |
2014-01-21 | 9469-053-0804 | 2.46 ppb |
2014-01-29 | 9469-053-0724 | 6.01 ppb |
2014-02-18 | 9469-053-0824 | 2.67 ppb |
2014-02-27 | 9469-053-0758 | 2.72 ppb |
2014-03-05 | 9469-053-0821 | 2.72 ppb |
2014-03-20 | 9469-053-0731 | 2.50 ppb |
2014-03-25 | 9469-053-0756 | 2.53 ppb |
2014-04-01 | 9469-053-0851 | 2.42 ppb |
2014-04-10 | 9469-053-0936 | 2.20 ppb |
2014-04-15 | 9469-053-0947 | 2.30 ppb |
2014-05-01 | 9469-053-0746 | 2.24 ppb |
2014-05-14 | 9469-053-0756 | 2.35 ppb |
2014-05-20 | 9469-053-0736 | 2.11 ppb |
2014-05-23 | 2706-022-0755 | 6.70 ppb |
2014-05-28 | 9469-053-0737 | 2.12 ppb |
2014-06-03 | 9469-053-0801 | 2.44 ppb |
2014-06-09 | 9469-053-0825 | 2.39 ppb |
2014-06-17 | 9469-053-0815 | 2.33 ppb |
2014-06-24 | 9469-053-0731 | 2.37 ppb |
2014-07-02 | 9469-053-0751 | 2.16 ppb |
2014-07-23 | 9469-053-0924 | 2.16 ppb |
2014-07-30 | 9469-053-0851 | 2.36 ppb |
2014-08-07 | 9469-053-0932 | 2.33 ppb |
2014-08-12 | 9469-053-0751 | 2.34 ppb |
2014-08-14 | 2706-015-1114 | 3.30 ppb |
2014-08-14 | 2706-016-1014 | 2.80 ppb |
2014-08-14 | 2706-045-1126 | 7.20 ppb |
2014-08-20 | 9469-053-0744 | 2.36 ppb |
2014-08-28 | 9469-053-0832 | 2.26 ppb |
2014-09-02 | 9469-053-0747 | 2.50 ppb |
2014-09-10 | 9469-053-0744 | 2.05 ppb |
2014-09-17 | 9469-053-0934 | 2.63 ppb |
2014-09-24 | 9469-053-0924 | 2.41 ppb |
2014-10-01 | 9469-053-0932 | 2.29 ppb |
2014-10-09 | 9469-053-1007 | 2.26 ppb |
2014-10-15 | 9469-053-1018 | 2.22 ppb |
2014-10-23 | 9469-053-0736 | 2.15 ppb |
2014-10-29 | 9469-053-0752 | 2.16 ppb |
2014-11-04 | 9469-053-0746 | 2.11 ppb |
2014-11-20 | 9469-053-0746 | 2.29 ppb |
2014-11-24 | 2706-001-1030 | 7.30 ppb |
2014-11-25 | 9469-053-0736 | 2.35 ppb |
2014-12-04 | 9469-053-0730 | 2.35 ppb |
2014-12-10 | 9469-053-0751 | 2.40 ppb |
2014-12-18 | 9469-053-0926 | 2.42 ppb |
2014-12-23 | 9469-053-0836 | 2.48 ppb |
2014-12-30 | 9469-053-0941 | 2.46 ppb |
2015-01-06 | 9469-053-1004 | 2.34 ppb |
2015-01-15 | 9469-053-0838 | 2.44 ppb |
2015-01-22 | 9469-053-0851 | 2.39 ppb |
2015-01-29 | 9469-053-0718 | 2.40 ppb |
2015-02-04 | 9469-053-0830 | 2.69 ppb |
2015-02-11 | 9469-053-0830 | 2.34 ppb |
2015-02-18 | 9469-053-0830 | 2.28 ppb |
2015-02-25 | 9469-053-1010 | 2.54 ppb |
2015-03-04 | 9469-053-0956 | 2.45 ppb |
2015-03-13 | 9469-053-0814 | 2.51 ppb |
2015-03-24 | 9469-053-1039 | 2.45 ppb |
2015-04-02 | 9469-053-1216 | 2.43 ppb |
2015-04-09 | 9469-053-1020 | 2.48 ppb |
2015-04-23 | 9469-053-1056 | 2.27 ppb |
2015-05-13 | 9469-053-1047 | 2.31 ppb |
2015-05-20 | 9469-053-0944 | 2.85 ppb |
2015-05-26 | 9469-053-0944 | 2.93 ppb |
2015-06-08 | 9469-053-0849 | 2.75 ppb |
2015-06-17 | 9469-053-0839 | 2.37 ppb |
2015-06-25 | 9469-053-0751 | 2.63 ppb |
2015-07-02 | 9469-053-0934 | 2.71 ppb |
2015-07-09 | 9469-053-0742 | 2.67 ppb |
2015-07-16 | 9469-053-0718 | 2.77 ppb |
2015-07-28 | 9469-053-0731 | 2.92 ppb |
2015-08-04 | 9469-053-0857 | 2.61 ppb |
2015-08-18 | 9469-053-0838 | 3.10 ppb |
2015-08-25 | 9469-053-0856 | 2.43 ppb |
2015-09-17 | 2706-004-0840 | 6.50 ppb |
2015-09-17 | 2706-006-0916 | 4.60 ppb |
2015-09-17 | 2706-007-0855 | 3.70 ppb |
2015-09-30 | 9469-053-1017 | 2.88 ppb |
2015-10-06 | 9469-053-1137 | 2.93 ppb |
2015-10-14 | 9469-053-0754 | 2.90 ppb |
2015-10-20 | 9469-053-0852 | 2.50 ppb |
2015-11-03 | 9469-053-0800 | 2.83 ppb |
2015-11-10 | 9469-053-0941 | 2.88 ppb |
2015-11-17 | 9469-053-1102 | 2.68 ppb |
2015-11-23 | 9469-053-0736 | 2.54 ppb |
2015-12-02 | 9469-053-0938 | 2.60 ppb |
2015-12-10 | 9469-053-0746 | 2.81 ppb |
2015-12-15 | 9469-053-0841 | 2.57 ppb |
2016-01-12 | 9469-053-0828 | 2.71 ppb |
2016-01-19 | 9469-053-1056 | 2.97 ppb |
2016-01-26 | 9469-053-1036 | 2.52 ppb |
2016-02-02 | 9469-053-0802 | 2.81 ppb |
2016-02-09 | 9469-053-0937 | 2.57 ppb |
2016-02-16 | 9469-053-1216 | 2.76 ppb |
2016-02-24 | 9588-044-1320 | 7.40 ppb |
2016-02-24 | 9469-053-1058 | 2.57 ppb |
2016-03-01 | 9469-053-0941 | 2.60 ppb |
2016-03-08 | 9469-053-0956 | 2.71 ppb |
2016-03-15 | 9469-053-1012 | 2.53 ppb |
2016-03-30 | 9469-053-1211 | 2.69 ppb |
2016-04-05 | 9469-053-1232 | 2.70 ppb |
2016-04-19 | 9469-053-1218 | 2.79 ppb |
2016-05-03 | 9469-053-1405 | 5.69 ppb |
2016-06-14 | 9469-053-1432 | 2.55 ppb |
2016-08-03 | 9469-053-1212 | 2.56 ppb |
2016-08-16 | 9469-053-1309 | 2.66 ppb |
2016-08-23 | 9469-053-1033 | 2.75 ppb |
2016-08-30 | 9469-053-1136 | 4.71 ppb |
2016-09-06 | 9469-053-0934 | 3.89 ppb |
2016-09-13 | 9469-053-0926 | 3.64 ppb |
2016-09-20 | 9469-053-0939 | 4.24 ppb |
2016-09-28 | 9469-053-1018 | 3.88 ppb |
2016-10-13 | 9469-053-0844 | 4.83 ppb |
2016-10-18 | 9469-053-1028 | 5.16 ppb |
2016-10-25 | 9469-053-0000 | 4.75 ppb |
2016-11-01 | 9469-053-1026 | 4.73 ppb |
2016-11-10 | 9469-053-0936 | 5.18 ppb |
2016-11-15 | 9469-053-0750 | 5.31 ppb |
2016-11-22 | 9469-053-0851 | 4.69 ppb |
2016-11-29 | 9469-053-0730 | 5.25 ppb |
2017-01-03 | 9469-053-0818 | 5.04 ppb |
2017-01-10 | 9469-053-0806 | 4.94 ppb |
2017-01-17 | 9469-053-1129 | 5.18 ppb |
2017-01-23 | 9469-053-0744 | 4.49 ppb |
2017-02-01 | 9469-053-0816 | 4.45 ppb |
2017-02-07 | 9469-053-0731 | 5.30 ppb |
2017-02-14 | 9469-053-0724 | 5.39 ppb |
2017-02-21 | 9469-053-0721 | 4.44 ppb |
2017-02-27 | 9469-053-0744 | 5.36 ppb |
2017-03-07 | 9469-053-0722 | 5.15 ppb |
2017-03-15 | 9469-053-0745 | 5.50 ppb |
2017-03-20 | 9469-053-0734 | 4.72 ppb |
2017-03-27 | 9469-053-0802 | 5.49 ppb |
2017-04-04 | 9469-053-0746 | 4.82 ppb |
2017-04-11 | 9469-053-0757 | 4.95 ppb |
2017-05-17 | 9588-022-1041 | 8.10 ppb |
2017-05-31 | 9469-053-0807 | 4.43 ppb |
2017-06-06 | 9469-053-0828 | 4.19 ppb |
2017-06-14 | 9469-053-0837 | 4.05 ppb |
2017-07-05 | 9469-053-0921 | 4.80 ppb |
2017-07-18 | 9469-053-0750 | 4.98 ppb |
2017-07-25 | 9469-053-0737 | 5.06 ppb |
2017-08-01 | 9469-053-0804 | 5.13 ppb |
2017-08-08 | 9469-053-0745 | 4.90 ppb |
2017-08-15 | 9469-053-0750 | 4.70 ppb |
2017-08-22 | 9588-001-1130 | 2.50 ppb |
2017-08-22 | 9588-015-1049 | 3.50 ppb |
2017-08-22 | 9588-016-1112 | 2.90 ppb |
2017-08-22 | 9588-045-1022 | 8.60 ppb |
2017-08-29 | 9469-053-0743 | 5.37 ppb |
2017-09-05 | 9469-053-0823 | 4.95 ppb |
2017-09-12 | 9469-053-0803 | 5.03 ppb |
2017-09-19 | 9469-053-0737 | 5.66 ppb |
2017-09-26 | 9469-053-0737 | 4.77 ppb |
2017-10-03 | 9469-053-0726 | 5.17 ppb |
2017-10-10 | 9469-053-0807 | 5.30 ppb |
2017-10-17 | 9469-053-0738 | 5.52 ppb |
2017-10-24 | 9469-053-0807 | 5.23 ppb |
2017-10-31 | 9469-053-0740 | 4.86 ppb |
2017-11-07 | 9469-053-0747 | 5.13 ppb |
2017-11-14 | 9469-053-0740 | 4.94 ppb |
2017-11-21 | 9469-053-0733 | 4.72 ppb |
2017-11-28 | 9469-053-0744 | 5.01 ppb |
2017-12-05 | 9469-053-0740 | 5.96 ppb |
2017-12-12 | 9469-053-0746 | 6.51 ppb |
2017-12-19 | 9469-053-0741 | 5.59 ppb |
2017-12-26 | 9469-053-0733 | 5.36 ppb |
2018-01-02 | 9469-053-0747 | 6.39 ppb |
2018-01-08 | 9469-053-0759 | 6.24 ppb |
2018-01-16 | 9469-053-1339 | 6.00 ppb |
2018-01-23 | 9469-053-0735 | 6.20 ppb |
2018-01-30 | 9469-053-0742 | 6.66 ppb |
2018-02-06 | 9469-053-0755 | 6.09 ppb |
2018-02-13 | 9469-053-0748 | 6.15 ppb |
2018-02-20 | 9469-053-0751 | 5.73 ppb |
2018-02-21 | 9588-004-0800 | 6.90 ppb |
2018-02-21 | 9588-007-0822 | 3.80 ppb |
2018-02-27 | 9469-053-0745 | 6.51 ppb |
2018-03-06 | 9469-053-0830 | 5.99 ppb |
2018-03-13 | 9469-053-0732 | 6.25 ppb |
2018-03-19 | 9469-053-1429 | 5.85 ppb |
2018-03-27 | 9469-053-0750 | 6.52 ppb |
2018-04-03 | 9469-053-0737 | 5.44 ppb |
2018-04-10 | 9469-053-0744 | 6.51 ppb |
2018-04-16 | 9469-053-0740 | 5.90 ppb |
2018-04-24 | 9469-053-0830 | 6.88 ppb |
2018-05-01 | 9469-053-0801 | 5.37 ppb |
2018-05-08 | 9469-053-0826 | 6.38 ppb |
2018-05-15 | 9469-053-0829 | 6.78 ppb |
2018-05-22 | 9469-053-0818 | 5.99 ppb |
2018-05-29 | 9469-053-0802 | 6.12 ppb |
2018-06-05 | 9469-053-0746 | 5.98 ppb |
2018-06-12 | 9469-053-0750 | 5.27 ppb |
2018-06-19 | 9469-053-0740 | 5.95 ppb |
2018-06-26 | 9469-053-0756 | 6.50 ppb |
2018-07-02 | 9469-053-0754 | 7.04 ppb |
2018-07-10 | 9469-053-0755 | 6.33 ppb |
2018-07-17 | 9469-053-0757 | 5.88 ppb |
2018-07-24 | 9469-053-0751 | 6.42 ppb |
2018-07-31 | 9469-053-0736 | 7.49 ppb |
2018-08-06 | 9588-006-0841 | 5.20 ppb |
2018-08-14 | 9469-053-0735 | 6.48 ppb |
2018-08-21 | 9469-053-0749 | 6.10 ppb |
2018-08-28 | 9469-053-0752 | 6.30 ppb |
2018-09-04 | 9469-053-0830 | 6.33 ppb |
2018-09-11 | 9469-053-0752 | 6.08 ppb |
2018-09-18 | 9469-053-0820 | 6.00 ppb |
2018-09-25 | 9469-053-0803 | 5.96 ppb |
2018-10-02 | 9469-053-0932 | 6.04 ppb |
2018-10-09 | 9469-053-0758 | 6.26 ppb |
2018-10-16 | 9469-053-1412 | 6.38 ppb |
2018-10-23 | 9469-053-0801 | 6.19 ppb |
2018-10-30 | 9469-053-0800 | 7.34 ppb |
2018-11-06 | 9469-053-0742 | 6.38 ppb |
2018-11-13 | 9469-053-0925 | 6.37 ppb |
2018-11-20 | 9469-053-0751 | 6.58 ppb |
2018-11-27 | 9469-053-1309 | 6.33 ppb |
2018-12-04 | 9469-053-0805 | 6.58 ppb |
2018-12-11 | 9469-053-0904 | 6.53 ppb |
2018-12-18 | 9469-053-0745 | 6.63 ppb |
2018-12-26 | 9469-053-1120 | 6.94 ppb |
2019-01-02 | 9469-053-1221 | 6.11 ppb |
2019-01-08 | 9469-053-0944 | 6.17 ppb |
2019-01-15 | 9469-053-0811 | 6.16 ppb |
2019-01-22 | 9469-053-0820 | 6.22 ppb |
2019-01-29 | 9469-053-1209 | 6.31 ppb |
2019-02-05 | 9469-053-0749 | 6.00 ppb |
2019-02-07 | 9588-022-1045 | 8.20 ppb |
2019-02-07 | 9588-044-1015 | 6.20 ppb |
2019-02-12 | 9469-053-0800 | 6.49 ppb |
2019-02-19 | 9469-053-0928 | 6.30 ppb |
2019-02-26 | 9469-053-0748 | 6.75 ppb |
2019-03-05 | 9469-053-0749 | 6.61 ppb |
2019-03-12 | 9469-053-0808 | 6.06 ppb |
2019-03-19 | 9469-053-0920 | 6.33 ppb |
2019-03-26 | 9469-053-0740 | 7.23 ppb |
2019-04-03 | 9469-053-0803 | 6.71 ppb |
2019-04-09 | 9469-053-0735 | 6.63 ppb |
2019-04-17 | 9469-053-0821 | 6.51 ppb |
2019-04-23 | 9469-053-0754 | 6.68 ppb |
2019-04-30 | 9469-053-0813 | 6.81 ppb |
2019-05-07 | 9469-053-0739 | 6.94 ppb |
2019-06-04 | 9469-053-0749 | 6.30 ppb |
2019-07-02 | 9469-053-0751 | 6.49 ppb |
2019-08-06 | 9469-053-0743 | 6.72 ppb |
2019-09-03 | 9469-053-0752 | 6.67 ppb |
2019-10-01 | 9469-053-0800 | 6.96 ppb |
2019-11-05 | 9469-053-0802 | 6.70 ppb |
2019-11-05 | 9469-053-1531 | 6.70 ppb |