Chromium (hexavalent)
Cucamonga Valley Water District
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).
112
Samples
0
Samples exceeding legal limit (MCL)
91
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | 1.21 ppb | 19 | 19 | 0.160 ppb - 3.20 ppb |
| 2014 | 2.07 ppb | 50 | 41 | ND - 6.90 ppb |
| 2015 | 2.08 ppb | 11 | 11 | 0.370 ppb - 4.50 ppb |
| 2016 | 1.96 ppb | 5 | 2 | ND - 6.80 ppb |
| 2017 | 2.87 ppb | 24 | 18 | ND - 7.50 ppb |
| 2018 | ND | 3 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2013-08-08 | B3H0929-01 | 0.160 ppb |
| 2013-08-08 | B3H0931-09 | 1.30 ppb |
| 2013-08-08 | B3H0931-29 | 1.50 ppb |
| 2013-08-08 | B3H0931-23 | 2.20 ppb |
| 2013-08-08 | B3H0931-27 | 0.180 ppb |
| 2013-08-08 | B3H0931-25 | 3.20 ppb |
| 2013-08-08 | B3H0931-21 | 0.580 ppb |
| 2013-08-08 | B3H0931-05 | 2.10 ppb |
| 2013-08-08 | B3H0931-01 | 0.190 ppb |
| 2013-08-08 | B3H0931-17 | 0.570 ppb |
| 2013-08-08 | B3H0931-13 | 3.20 ppb |
| 2013-08-15 | B3H1538-01 | 0.180 ppb |
| 2013-08-15 | B3H1538-05 | 2.20 ppb |
| 2013-11-14 | B3K1254-06 | 1.60 ppb |
| 2013-11-14 | B3K1254-01 | 0.510 ppb |
| 2013-11-14 | B3K1254-03 | 0.480 ppb |
| 2013-11-14 | B3K1254-08 | 1.50 ppb |
| 2013-12-16 | B3L1447-01 | 0.250 ppb |
| 2013-12-16 | B3L1447-04 | 1.10 ppb |
| 2014-02-12 | B4B1260-01 | 2.80 ppb |
| 2014-02-12 | B4B1260-06 | 0.620 ppb |
| 2014-02-12 | B4B1264-07 | 0.640 ppb |
| 2014-02-12 | B4B1260-04 | 0.940 ppb |
| 2014-02-13 | B4B1377-10 | 0.320 ppb |
| 2014-02-13 | B4B1379-04 | 0.490 ppb |
| 2014-02-13 | B4B1377-07 | 2.10 ppb |
| 2014-02-13 | B4B1377-04 | 2.50 ppb |
| 2014-02-13 | B4B1377-17 | 0.480 ppb |
| 2014-02-13 | B4B1377-15 | 2.30 ppb |
| 2014-02-13 | B4B1377-13 | 1.90 ppb |
| 2014-02-13 | B4B1379-07 | 2.10 ppb |
| 2014-02-13 | B4B1379-01 | 0.740 ppb |
| 2014-02-13 | B4B1377-01 | 3.30 ppb |
| 2014-02-25 | B4B2214-01 | 0.640 ppb |
| 2014-05-15 | B4E1494-04 | 0.390 ppb |
| 2014-05-15 | B4E1494-01 | 1.90 ppb |
| 2014-05-15 | B4E1494-12 | 2.00 ppb |
| 2014-05-15 | B4E1494-10 | 2.50 ppb |
| 2014-05-15 | B4E1494-14 | 1.70 ppb |
| 2014-05-15 | B4E1494-07 | 0.690 ppb |
| 2014-08-05 | 3761-051-1210 | 2.30 ppb |
| 2014-08-07 | 3761-050-1007 | 2.30 ppb |
| 2014-08-07 | 3761-052-1015 | 2.50 ppb |
| 2014-08-07 | 3761-053-1022 | 2.50 ppb |
| 2014-08-07 | 3761-054-1042 | ND |
| 2014-08-14 | 3761-001-0917 | ND |
| 2014-08-14 | 3761-016-1105 | ND |
| 2014-08-14 | 3761-022-0842 | ND |
| 2014-08-18 | 3761-008-1048 | 6.90 ppb |
| 2014-08-18 | 3761-010-1033 | ND |
| 2014-08-18 | 3761-029-1039 | ND |
| 2014-08-18 | 3761-033-1050 | 3.40 ppb |
| 2014-08-18 | 3761-034-1043 | ND |
| 2014-08-18 | 3761-035-1054 | 4.40 ppb |
| 2014-08-18 | 3761-038-1105 | 3.20 ppb |
| 2014-08-21 | 3761-023-0930 | ND |
| 2014-08-21 | 3761-024-0940 | ND |
| 2014-09-04 | 3761-027-1010 | 4.50 ppb |
| 2014-09-08 | 3761-002-1033 | 5.60 ppb |
| 2014-09-08 | 3761-003-1039 | 4.20 ppb |
| 2014-09-08 | 3761-004-1043 | 3.90 ppb |
| 2014-09-08 | 3761-025-1050 | 3.40 ppb |
| 2014-09-08 | 3761-037-1054 | 4.60 ppb |
| 2014-09-08 | 3761-042-1048 | 4.20 ppb |
| 2014-10-15 | 3761-008-0900 | 1.40 ppb |
| 2014-10-15 | 3761-027-0915 | 3.40 ppb |
| 2014-10-16 | 3761-039-1050 | 4.00 ppb |
| 2014-11-20 | 3761-033-1145 | 3.70 ppb |
| 2014-12-04 | 3761-055-0909 | 2.10 ppb |
| 2015-02-12 | B5B1253-04 | 0.370 ppb |
| 2015-02-12 | B5B1253-01 | 0.380 ppb |
| 2015-03-05 | 3761-027-0855 | 4.50 ppb |
| 2015-03-12 | 3761-055-1140 | 2.20 ppb |
| 2015-05-13 | 3761-055-1050 | 2.20 ppb |
| 2015-08-13 | B5H1346-03 | 3.00 ppb |
| 2015-08-13 | B5H1346-01 | 3.00 ppb |
| 2015-08-20 | 3761-055-0925 | 2.40 ppb |
| 2015-11-19 | B5K1958-04 | 1.30 ppb |
| 2015-11-19 | B5K1958-01 | 1.20 ppb |
| 2015-11-23 | 3761-055-0900 | 2.30 ppb |
| 2016-02-11 | 3761-055-1040 | 3.00 ppb |
| 2016-07-21 | 3761-001-0930 | ND |
| 2016-07-21 | 3761-017-1120 | ND |
| 2016-07-21 | 3761-022-0955 | ND |
| 2016-11-23 | 3761-035-1440 | 6.80 ppb |
| 2017-06-02 | 3761-027-0918 | 5.80 ppb |
| 2017-06-14 | 3761-035-0930 | 5.20 ppb |
| 2017-06-14 | 3761-038-1026 | 3.40 ppb |
| 2017-06-14 | 3761-039-0959 | 2.90 ppb |
| 2017-06-15 | 3761-008-0931 | 7.50 ppb |
| 2017-06-15 | 3761-033-1047 | 4.00 ppb |
| 2017-06-15 | 3761-034-0910 | ND |
| 2017-06-19 | 3761-042-0859 | 3.70 ppb |
| 2017-06-19 | 3761-053-0908 | 4.20 ppb |
| 2017-06-22 | 3761-003-0806 | 3.80 ppb |
| 2017-06-22 | 3761-025-0818 | 3.50 ppb |
| 2017-06-22 | 3761-052-0913 | 2.80 ppb |
| 2017-06-22 | 3761-053-0902 | 2.90 ppb |
| 2017-06-26 | 3761-002-0929 | 5.80 ppb |
| 2017-06-26 | 3761-054-1041 | 2.60 ppb |
| 2017-06-28 | 3761-050-0744 | 2.30 ppb |
| 2017-06-28 | 3761-051-0735 | 2.50 ppb |
| 2017-07-03 | 3761-055-1041 | 2.20 ppb |
| 2017-07-12 | 3761-017-1408 | ND |
| 2017-07-13 | 3761-001-0733 | ND |
| 2017-07-13 | 3761-010-1305 | ND |
| 2017-07-13 | 3761-022-0928 | ND |
| 2017-07-13 | 3761-029-1319 | ND |
| 2017-07-17 | 3761-004-1231 | 3.80 ppb |
| 2018-03-14 | 3761-016-1008 | ND |
| 2018-03-14 | 3761-023-1149 | ND |
| 2018-03-28 | 3761-024-0931 | ND |