Chromium (hexavalent)
California American Water Company - Lincoln Oaks
Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).
124
Samples
0
Samples exceeding legal limit (MCL)
118
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 2.97 ppb | 21 | 19 | ND - 4.90 ppb |
| 2015 | 3.21 ppb | 78 | 77 | ND - 7.10 ppb |
| 2016 | 5.01 ppb | 2 | 2 | 4.03 ppb - 5.99 ppb |
| 2017 | 2.70 ppb | 20 | 17 | ND - 7.29 ppb |
| 2018 | 4.55 ppb | 2 | 2 | 3.90 ppb - 5.20 ppb |
| 2019 | 3.51 ppb | 1 | 1 | 3.51 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.02 ppb
The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) 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.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-05-06 | 5810-004-1138 | 3.50 ppb |
| 2014-05-06 | 5810-005-1030 | 3.50 ppb |
| 2014-05-06 | 5810-009-1228 | 3.70 ppb |
| 2014-05-06 | 5810-013-1130 | 3.40 ppb |
| 2014-05-06 | 5810-014-0945 | 2.00 ppb |
| 2014-05-06 | 5810-015-1045 | 3.70 ppb |
| 2014-05-06 | 5810-016-1010 | 3.90 ppb |
| 2014-05-06 | 5810-019-0845 | 4.90 ppb |
| 2014-05-06 | 5810-023-1230 | 3.90 ppb |
| 2014-05-07 | 5810-001-1030 | 1.10 ppb |
| 2014-05-07 | 5810-003-1220 | 2.30 ppb |
| 2014-05-07 | 5810-006-1010 | 2.40 ppb |
| 2014-05-07 | 5810-007-1120 | 3.40 ppb |
| 2014-05-07 | 5810-012-1330 | 2.60 ppb |
| 2014-05-07 | 5810-026-0920 | 4.90 ppb |
| 2014-05-07 | 5810-027-0927 | 3.50 ppb |
| 2014-05-07 | 5810-028-1125 | 2.90 ppb |
| 2014-05-08 | 5810-008-0945 | 4.50 ppb |
| 2014-05-08 | 5810-010-1145 | ND |
| 2014-06-24 | 5810-002-1030 | ND |
| 2014-07-01 | 5810-022-0920 | 2.30 ppb |
| 2015-02-02 | 28254801 | 3.87 ppb |
| 2015-02-02 | 28253501 | 0.1000 ppb |
| 2015-02-02 | 28253301 | 3.46 ppb |
| 2015-02-02 | 28255701 | 4.77 ppb |
| 2015-02-03 | 28254201 | 2.04 ppb |
| 2015-02-03 | 28252301 | 3.65 ppb |
| 2015-02-03 | 28256701 | 2.04 ppb |
| 2015-02-03 | 28256801 | 3.59 ppb |
| 2015-02-04 | 28255201 | 4.54 ppb |
| 2015-02-04 | 28252701 | 3.95 ppb |
| 2015-02-04 | 28252401 | 4.38 ppb |
| 2015-02-04 | 28256301 | 4.05 ppb |
| 2015-02-10 | 28252201 | 0.590 ppb |
| 2015-02-10 | 28254101 | 2.57 ppb |
| 2015-02-10 | 28256001 | 3.53 ppb |
| 2015-02-10 | 28257001 | 0.560 ppb |
| 2015-02-12 | 28254301 | 2.60 ppb |
| 2015-02-12 | 28252601 | 4.05 ppb |
| 2015-02-12 | 28256401 | 4.19 ppb |
| 2015-02-12 | 28256601 | 2.54 ppb |
| 2015-02-17 | 28255401 | 3.81 ppb |
| 2015-02-17 | 28253701 | 3.82 ppb |
| 2015-02-17 | 28253801 | 1.38 ppb |
| 2015-02-17 | 28257101 | 1.35 ppb |
| 2015-02-19 | 28254001 | 2.79 ppb |
| 2015-02-19 | 28252801 | 1.32 ppb |
| 2015-02-19 | 28256201 | 0.460 ppb |
| 2015-02-19 | 28256901 | 2.70 ppb |
| 2015-02-24 | 28254401 | 1.89 ppb |
| 2015-02-24 | 28256101 | 1.95 ppb |
| 2015-02-25 | 28255101 | 3.17 ppb |
| 2015-02-25 | 28253901 | 3.23 ppb |
| 2015-02-27 | 28252901 | 1.81 ppb |
| 2015-02-27 | 28255901 | 1.76 ppb |
| 2015-05-14 | 1225-025-1150 | ND |
| 2015-05-27 | 28253001 | 4.66 ppb |
| 2015-05-27 | 28255801 | 4.65 ppb |
| 2015-06-09 | 29303701 | 3.71 ppb |
| 2015-06-09 | 29303401 | 3.46 ppb |
| 2015-06-17 | 29303201 | 4.04 ppb |
| 2015-06-17 | 29303901 | 3.48 ppb |
| 2015-08-10 | 30013201 | 4.98 ppb |
| 2015-08-10 | 30013601 | 7.10 ppb |
| 2015-08-10 | 30008001 | 3.61 ppb |
| 2015-08-10 | 30008101 | 4.98 ppb |
| 2015-08-10 | 30008701 | 5.01 ppb |
| 2015-08-10 | 30016001 | 2.06 ppb |
| 2015-08-10 | 30016301 | 3.51 ppb |
| 2015-08-10 | 30009801 | 2.03 ppb |
| 2015-08-11 | 30008301 | 2.98 ppb |
| 2015-08-11 | 30012901 | 3.21 ppb |
| 2015-08-11 | 30015201 | 3.76 ppb |
| 2015-08-11 | 30014201 | 2.58 ppb |
| 2015-08-11 | 30014801 | 2.49 ppb |
| 2015-08-11 | 30010301 | 2.51 ppb |
| 2015-08-11 | 30009201 | 4.09 ppb |
| 2015-08-13 | 30008601 | 5.53 ppb |
| 2015-08-13 | 30009001 | 3.30 ppb |
| 2015-08-13 | 30015701 | 2.67 ppb |
| 2015-08-13 | 30013901 | 5.53 ppb |
| 2015-08-13 | 30010001 | 2.71 ppb |
| 2015-08-13 | 30016801 | 3.19 ppb |
| 2015-08-18 | 29303801 | 5.44 ppb |
| 2015-08-18 | 29303301 | 2.32 ppb |
| 2015-08-18 | 30007901 | 2.88 ppb |
| 2015-08-18 | 30014601 | 4.19 ppb |
| 2015-08-18 | 30009601 | 4.28 ppb |
| 2015-08-18 | 30016701 | 0.770 ppb |
| 2015-08-19 | 30013401 | 3.53 ppb |
| 2015-08-19 | 30008401 | 0.380 ppb |
| 2015-08-19 | 30008901 | 3.84 ppb |
| 2015-08-19 | 30015001 | 0.430 ppb |
| 2015-08-24 | 30008201 | 5.55 ppb |
| 2015-08-24 | 30015401 | 4.67 ppb |
| 2015-08-25 | 30009401 | 4.66 ppb |
| 2015-08-25 | 30016601 | 2.62 ppb |
| 2015-12-07 | 3372191 | 4.40 ppb |
| 2015-12-07 | 3372203 | 5.70 ppb |
| 2016-02-25 | 1225-021-0835 | 5.99 ppb |
| 2016-06-09 | 1225-024-0950 | 4.03 ppb |
| 2017-05-08 | 1225-012-0940 | 1.62 ppb |
| 2017-05-08 | 1225-013-1045 | 3.63 ppb |
| 2017-05-08 | 1225-014-1009 | 2.25 ppb |
| 2017-05-08 | 1225-015-1425 | 7.29 ppb |
| 2017-05-08 | 1225-021-1200 | 2.43 ppb |
| 2017-05-08 | 1225-023-0757 | 3.66 ppb |
| 2017-05-08 | 1225-026-1121 | 4.56 ppb |
| 2017-05-08 | 1225-028-1400 | 2.52 ppb |
| 2017-05-09 | 1225-004-0935 | 4.11 ppb |
| 2017-05-09 | 1225-005-0856 | 1.91 ppb |
| 2017-05-09 | 1225-006-1142 | ND |
| 2017-05-09 | 1225-007-0910 | 2.15 ppb |
| 2017-05-09 | 1225-009-1035 | 3.63 ppb |
| 2017-05-09 | 1225-022-1340 | 1.86 ppb |
| 2017-05-10 | 1225-010-1202 | ND |
| 2017-05-17 | 1225-001-1320 | 1.57 ppb |
| 2017-05-17 | 1225-002-1315 | ND |
| 2017-05-17 | 1225-025-0910 | 4.09 ppb |
| 2017-10-19 | 1225-019-1035 | 4.58 ppb |
| 2017-12-19 | 1225-003-0914 | 2.14 ppb |
| 2018-02-13 | 1233-016-0955 | 5.20 ppb |
| 2018-09-19 | 1233-008-1315 | 3.90 ppb |
| 2019-05-07 | 1225-024-1310 | 3.51 ppb |