Arsenic
Park WC - Lynwood
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 | 2.98 ppb | 45 | 45 | 2.40 ppb - 6.30 ppb |
2015 | 2.85 ppb | 46 | 46 | 2.40 ppb - 5.10 ppb |
2016 | 2.87 ppb | 26 | 26 | 2.30 ppb - 5.80 ppb |
2017 | 2.79 ppb | 36 | 36 | 2.40 ppb - 5.50 ppb |
2018 | 2.85 ppb | 53 | 53 | 2.30 ppb - 6.90 ppb |
2019 | 2.61 ppb | 53 | 52 | ND - 3.00 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 | 9588-021-1100 | 2.70 ppb |
2014-01-09 | 9588-021-1220 | 2.80 ppb |
2014-01-16 | 9588-021-1310 | 2.90 ppb |
2014-01-22 | 9588-021-1240 | 2.90 ppb |
2014-01-29 | 9588-021-1010 | 2.80 ppb |
2014-02-06 | 9588-021-1450 | 2.60 ppb |
2014-02-13 | 9588-021-1145 | 2.50 ppb |
2014-02-20 | 9588-021-1200 | 2.80 ppb |
2014-04-11 | 9588-021-1250 | 2.70 ppb |
2014-04-17 | 9588-021-1010 | 2.80 ppb |
2014-04-24 | 9588-021-0915 | 2.90 ppb |
2014-04-28 | 9588-021-0840 | 2.70 ppb |
2014-05-08 | 9588-021-1238 | 2.80 ppb |
2014-05-15 | 9588-021-0915 | 2.50 ppb |
2014-05-22 | 9588-021-0700 | 2.40 ppb |
2014-05-29 | 9588-021-1000 | 2.50 ppb |
2014-06-05 | 9588-021-1145 | 2.50 ppb |
2014-06-12 | 9588-021-1108 | 2.60 ppb |
2014-06-19 | 9588-021-1130 | 2.70 ppb |
2014-06-26 | 9588-021-1108 | 2.70 ppb |
2014-07-03 | 9588-021-1201 | 2.70 ppb |
2014-07-10 | 9588-021-1215 | 2.70 ppb |
2014-07-17 | 9588-021-1001 | 2.60 ppb |
2014-07-24 | 9588-021-1134 | 2.80 ppb |
2014-07-31 | 9588-021-1030 | 2.60 ppb |
2014-08-07 | 9588-021-1230 | 2.80 ppb |
2014-08-14 | 9588-021-1345 | 2.70 ppb |
2014-08-21 | 9588-021-1230 | 2.60 ppb |
2014-08-27 | 9588-021-0845 | 2.60 ppb |
2014-09-04 | 9588-021-1230 | 2.70 ppb |
2014-09-11 | 9588-021-1300 | 2.60 ppb |
2014-09-18 | 9588-021-0930 | 2.80 ppb |
2014-09-25 | 9588-021-1300 | 2.60 ppb |
2014-10-02 | 9588-021-1200 | 2.50 ppb |
2014-10-09 | 9588-021-0915 | 2.60 ppb |
2014-10-16 | 9588-021-1010 | 2.60 ppb |
2014-10-23 | 9588-021-1010 | 2.60 ppb |
2014-10-30 | 9588-021-1201 | 2.70 ppb |
2014-11-05 | 9588-021-1020 | 2.70 ppb |
2014-11-20 | 9588-021-1100 | 2.80 ppb |
2014-11-26 | 9588-021-0915 | 2.80 ppb |
2014-12-11 | 9588-021-1335 | 6.30 ppb |
2014-12-18 | 9588-021-1230 | 6.00 ppb |
2014-12-23 | 9588-021-1105 | 6.00 ppb |
2014-12-30 | 9588-021-1130 | 6.00 ppb |
2015-01-08 | 9588-021-1345 | 3.10 ppb |
2015-01-15 | 9588-021-1300 | 2.90 ppb |
2015-01-22 | 9588-021-1030 | 2.90 ppb |
2015-01-30 | 9588-021-1315 | 2.90 ppb |
2015-02-05 | 9588-021-1400 | 2.90 ppb |
2015-02-12 | 9588-021-1140 | 2.70 ppb |
2015-02-19 | 9588-021-1345 | 2.80 ppb |
2015-02-26 | 9588-005-1230 | 5.10 ppb |
2015-02-26 | 9588-021-1120 | 2.50 ppb |
2015-03-05 | 9588-021-1235 | 2.90 ppb |
2015-03-12 | 9588-021-1315 | 2.80 ppb |
2015-03-19 | 9588-021-1155 | 2.70 ppb |
2015-03-26 | 9588-021-1045 | 2.70 ppb |
2015-04-02 | 9588-021-0945 | 2.80 ppb |
2015-04-09 | 9588-021-1203 | 2.80 ppb |
2015-04-16 | 9588-021-1050 | 2.70 ppb |
2015-04-23 | 9588-021-1115 | 2.80 ppb |
2015-05-14 | 9588-021-0910 | 2.60 ppb |
2015-05-21 | 9588-021-1210 | 2.80 ppb |
2015-05-28 | 9588-021-1000 | 3.00 ppb |
2015-06-04 | 9588-021-1345 | 2.80 ppb |
2015-06-11 | 9588-021-1050 | 3.10 ppb |
2015-06-18 | 9588-021-1215 | 3.10 ppb |
2015-06-25 | 9588-021-1125 | 3.10 ppb |
2015-07-02 | 9588-021-1050 | 2.70 ppb |
2015-07-10 | 9588-021-1120 | 2.90 ppb |
2015-07-16 | 9588-021-1120 | 2.80 ppb |
2015-07-24 | 9588-021-1400 | 3.20 ppb |
2015-07-30 | 9588-021-1320 | 2.70 ppb |
2015-08-07 | 9588-021-1110 | 2.60 ppb |
2015-08-13 | 9588-021-1130 | 2.70 ppb |
2015-08-20 | 9588-021-1105 | 2.80 ppb |
2015-08-27 | 9588-021-1400 | 2.80 ppb |
2015-09-03 | 9588-021-1100 | 2.60 ppb |
2015-09-10 | 9588-021-1245 | 2.60 ppb |
2015-09-18 | 9588-021-1105 | 2.70 ppb |
2015-10-01 | 9588-021-1045 | 3.00 ppb |
2015-10-29 | 9588-021-0930 | 2.70 ppb |
2015-11-05 | 9588-021-0815 | 2.60 ppb |
2015-11-12 | 9588-021-1215 | 2.80 ppb |
2015-11-19 | 9588-021-1030 | 3.00 ppb |
2015-11-25 | 9588-021-1015 | 2.90 ppb |
2015-12-03 | 9588-021-1245 | 2.60 ppb |
2015-12-10 | 9588-021-1200 | 2.70 ppb |
2015-12-17 | 9588-021-1340 | 2.40 ppb |
2015-12-23 | 9588-021-1420 | 2.90 ppb |
2016-01-07 | 9588-021-1201 | 2.90 ppb |
2016-01-14 | 9588-021-1015 | 2.90 ppb |
2016-01-21 | 9588-021-0000 | 2.80 ppb |
2016-01-28 | 9588-021-1033 | 3.00 ppb |
2016-02-05 | 9588-021-1020 | 2.80 ppb |
2016-02-11 | 9588-021-1030 | 2.30 ppb |
2016-02-18 | 9588-021-1025 | 2.80 ppb |
2016-02-24 | 9588-021-1300 | 2.90 ppb |
2016-03-02 | 9588-021-1240 | 2.70 ppb |
2016-03-10 | 9588-021-1030 | 2.90 ppb |
2016-03-17 | 9588-021-1030 | 2.80 ppb |
2016-03-24 | 9588-021-1150 | 2.80 ppb |
2016-03-31 | 9588-021-1200 | 2.70 ppb |
2016-04-08 | 9588-021-1100 | 2.40 ppb |
2016-04-14 | 9588-005-0945 | 5.80 ppb |
2016-04-14 | 9588-021-1045 | 2.70 ppb |
2016-04-21 | 9588-021-1100 | 2.90 ppb |
2016-04-29 | 9588-021-0950 | 2.80 ppb |
2016-05-05 | 9588-021-1055 | 2.70 ppb |
2016-05-12 | 9588-021-1040 | 2.70 ppb |
2016-05-19 | 9588-021-1225 | 2.80 ppb |
2016-05-26 | 9588-021-1107 | 2.80 ppb |
2016-06-02 | 9588-021-1030 | 2.50 ppb |
2016-06-09 | 9588-021-1205 | 2.90 ppb |
2016-06-16 | 9588-021-1015 | 2.60 ppb |
2016-06-24 | 9588-021-1230 | 2.70 ppb |
2017-02-23 | 9588-005-1315 | 5.50 ppb |
2017-05-04 | 9588-021-1338 | 3.60 ppb |
2017-05-11 | 9588-021-1015 | 3.40 ppb |
2017-05-19 | 9588-021-0930 | 3.00 ppb |
2017-05-25 | 9588-021-1125 | 3.10 ppb |
2017-06-01 | 9588-021-1100 | 2.60 ppb |
2017-06-08 | 9588-021-1220 | 2.70 ppb |
2017-06-15 | 9588-021-1305 | 2.70 ppb |
2017-06-22 | 9588-021-0950 | 2.60 ppb |
2017-06-30 | 9588-021-0900 | 2.70 ppb |
2017-07-07 | 9588-021-1230 | 2.60 ppb |
2017-07-13 | 9588-021-0910 | 2.50 ppb |
2017-07-20 | 9588-021-0830 | 2.80 ppb |
2017-07-27 | 9588-021-0930 | 3.00 ppb |
2017-08-03 | 9588-021-1020 | 3.00 ppb |
2017-08-10 | 9588-021-1045 | 2.80 ppb |
2017-08-17 | 9588-021-0910 | 2.40 ppb |
2017-08-24 | 9588-021-1208 | 2.60 ppb |
2017-08-31 | 9588-021-1250 | 2.50 ppb |
2017-09-07 | 9588-021-1340 | 2.70 ppb |
2017-09-11 | 9588-021-1215 | 2.60 ppb |
2017-09-21 | 9588-021-1205 | 2.70 ppb |
2017-09-28 | 9588-021-1430 | 2.90 ppb |
2017-10-05 | 9588-021-1225 | 2.60 ppb |
2017-10-12 | 9588-021-1111 | 2.40 ppb |
2017-10-19 | 9588-021-1100 | 2.60 ppb |
2017-10-26 | 9588-021-1030 | 2.70 ppb |
2017-11-02 | 9588-021-1100 | 2.50 ppb |
2017-11-09 | 9588-021-1000 | 2.60 ppb |
2017-11-17 | 9588-021-1100 | 2.60 ppb |
2017-11-22 | 9588-021-1130 | 2.70 ppb |
2017-11-30 | 9588-021-1100 | 2.50 ppb |
2017-12-08 | 9588-021-1215 | 2.40 ppb |
2017-12-15 | 9588-021-1115 | 2.60 ppb |
2017-12-18 | 9588-021-1025 | 2.70 ppb |
2017-12-28 | 9588-021-1500 | 2.70 ppb |
2018-01-04 | 9588-021-1305 | 2.40 ppb |
2018-01-11 | 9588-021-1035 | 2.80 ppb |
2018-01-19 | 9588-021-1010 | 2.90 ppb |
2018-01-25 | 9588-021-1035 | 2.70 ppb |
2018-02-01 | 9588-021-1205 | 2.70 ppb |
2018-02-08 | 9588-021-1035 | 2.80 ppb |
2018-02-15 | 9588-021-0825 | 2.90 ppb |
2018-02-22 | 9588-021-0920 | 2.70 ppb |
2018-02-27 | 9588-005-1230 | 5.00 ppb |
2018-03-01 | 9588-021-1102 | 2.50 ppb |
2018-03-08 | 9588-021-1045 | 2.70 ppb |
2018-03-15 | 9588-021-0905 | 2.70 ppb |
2018-03-22 | 9588-021-1235 | 2.50 ppb |
2018-03-29 | 9588-021-0815 | 2.50 ppb |
2018-04-06 | 9588-021-1320 | 2.50 ppb |
2018-04-12 | 9588-021-1215 | 2.80 ppb |
2018-04-19 | 9588-021-0900 | 2.70 ppb |
2018-04-26 | 9588-021-0930 | 2.80 ppb |
2018-05-03 | 9588-021-1150 | 2.60 ppb |
2018-05-11 | 9588-021-0815 | 2.70 ppb |
2018-05-17 | 9588-021-1100 | 3.10 ppb |
2018-05-24 | 9588-021-0945 | 2.50 ppb |
2018-05-31 | 9588-021-0915 | 2.60 ppb |
2018-06-07 | 9588-021-1045 | 2.50 ppb |
2018-06-14 | 9588-021-1100 | 2.90 ppb |
2018-06-21 | 9588-021-1000 | 2.90 ppb |
2018-06-28 | 9588-021-1240 | 2.90 ppb |
2018-07-05 | 9588-021-1320 | 2.70 ppb |
2018-07-12 | 9588-021-1015 | 6.90 ppb |
2018-07-19 | 9588-021-0915 | 2.60 ppb |
2018-07-26 | 9588-021-1020 | 6.40 ppb |
2018-08-01 | 9588-021-0930 | 2.60 ppb |
2018-08-09 | 9588-021-0825 | 3.00 ppb |
2018-08-16 | 9588-021-0950 | 2.50 ppb |
2018-08-23 | 9588-021-0930 | 2.30 ppb |
2018-08-30 | 9588-021-0630 | 2.70 ppb |
2018-09-06 | 9588-021-1420 | 2.40 ppb |
2018-09-13 | 9588-021-1010 | 2.40 ppb |
2018-09-20 | 9588-021-1310 | 2.50 ppb |
2018-09-27 | 9588-021-1015 | 2.40 ppb |
2018-10-04 | 9588-021-1145 | 2.80 ppb |
2018-10-11 | 9588-021-1145 | 2.40 ppb |
2018-10-18 | 9588-021-1110 | 2.50 ppb |
2018-10-25 | 9588-021-1120 | 2.50 ppb |
2018-11-01 | 9588-021-1245 | 2.60 ppb |
2018-11-08 | 9588-021-1330 | 2.60 ppb |
2018-11-15 | 9588-021-1035 | 2.70 ppb |
2018-11-21 | 9588-021-0846 | 2.40 ppb |
2018-11-29 | 9588-021-0915 | 2.80 ppb |
2018-12-04 | 9588-021-0900 | 2.80 ppb |
2018-12-11 | 9588-021-1315 | 2.80 ppb |
2018-12-18 | 9588-021-1030 | 3.00 ppb |
2018-12-26 | 9588-021-0930 | 2.40 ppb |
2019-01-02 | 9588-021-1005 | 2.70 ppb |
2019-01-08 | 9588-021-1340 | 2.80 ppb |
2019-01-15 | 9588-021-0830 | 3.00 ppb |
2019-01-22 | 9588-021-1010 | 2.70 ppb |
2019-01-29 | 9588-021-0930 | 2.70 ppb |
2019-02-06 | 9588-021-1115 | 2.70 ppb |
2019-02-12 | 9588-021-0905 | 2.70 ppb |
2019-02-19 | 9588-021-0815 | 2.90 ppb |
2019-02-26 | 9588-021-0955 | 2.80 ppb |
2019-03-05 | 9588-021-1058 | 2.50 ppb |
2019-03-12 | 9588-021-1021 | 2.80 ppb |
2019-03-19 | 9588-021-0842 | 2.10 ppb |
2019-03-26 | 9588-021-1045 | 2.60 ppb |
2019-04-02 | 9588-021-1300 | 2.90 ppb |
2019-04-09 | 9588-021-1121 | 2.50 ppb |
2019-04-16 | 9588-021-1037 | 2.30 ppb |
2019-04-23 | 9588-021-0820 | 2.70 ppb |
2019-04-30 | 9588-021-1020 | 2.60 ppb |
2019-05-07 | 9588-021-1224 | 2.80 ppb |
2019-05-14 | 9588-021-0930 | 2.60 ppb |
2019-05-21 | 9588-021-1122 | 2.70 ppb |
2019-05-28 | 9588-021-1221 | 2.50 ppb |
2019-06-03 | 9588-021-1200 | 2.80 ppb |
2019-06-11 | 9588-021-0953 | 2.70 ppb |
2019-06-18 | 9588-021-1350 | 2.60 ppb |
2019-06-25 | 9588-021-1245 | 2.60 ppb |
2019-07-02 | 9588-021-1305 | 2.70 ppb |
2019-07-09 | 9588-021-0900 | 2.70 ppb |
2019-07-16 | 9588-021-1018 | 2.50 ppb |
2019-07-23 | 9588-021-1030 | 2.40 ppb |
2019-07-30 | 9588-021-1203 | 2.50 ppb |
2019-08-06 | 9588-021-1255 | 2.80 ppb |
2019-08-13 | 9588-021-1405 | 2.80 ppb |
2019-08-20 | 9588-021-1140 | 2.60 ppb |
2019-08-27 | 9588-021-1115 | 2.60 ppb |
2019-09-05 | 9588-021-1117 | 2.40 ppb |
2019-09-12 | 9588-021-1035 | 2.00 ppb |
2019-09-17 | 9588-021-0910 | 2.90 ppb |
2019-09-24 | 9588-021-1100 | 2.50 ppb |
2019-10-01 | 9588-021-1333 | ND |
2019-10-08 | 9588-021-0830 | 2.70 ppb |
2019-10-15 | 9588-021-0945 | 2.70 ppb |
2019-10-22 | 9588-021-0915 | 2.40 ppb |
2019-10-29 | 9588-021-1000 | 2.40 ppb |
2019-11-05 | 3761-021-1255 | 2.70 ppb |
2019-11-12 | 3761-021-0820 | 2.70 ppb |
2019-11-19 | 3761-021-1015 | 2.80 ppb |
2019-11-26 | 3761-021-1132 | 2.90 ppb |
2019-12-03 | 3761-021-1320 | 2.80 ppb |
2019-12-10 | 3761-021-1115 | 2.70 ppb |
2019-12-17 | 3761-021-1130 | 2.90 ppb |
2019-12-23 | 3761-021-1248 | 2.90 ppb |
2019-12-31 | 3761-021-1038 | 3.00 ppb |