Chromium (hexavalent)
Yucaipa 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).
103
Samples
0
Samples exceeding legal limit (MCL)
83
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 1.81 ppb | 15 | 8 | ND - 7.70 ppb |
| 2015 | 1.79 ppb | 62 | 61 | ND - 6.60 ppb |
| 2016 | 1.81 ppb | 7 | 4 | ND - 3.90 ppb |
| 2017 | 1.48 ppb | 10 | 4 | ND - 5.80 ppb |
| 2018 | 1.20 ppb | 2 | 1 | ND - 2.40 ppb |
| 2019 | 2.09 ppb | 7 | 5 | ND - 4.10 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 |
|---|---|---|
| 2014-03-04 | 3761-013-1301 | 3.90 ppb |
| 2014-03-07 | 3761-016-1215 | ND |
| 2014-05-20 | 3761-006-0853 | 3.70 ppb |
| 2014-05-20 | 3761-066-1018 | 7.70 ppb |
| 2014-06-09 | 3761-052-1015 | ND |
| 2014-06-09 | 3761-066-1030 | 1.90 ppb |
| 2014-08-14 | 3761-036-1108 | 2.20 ppb |
| 2014-09-03 | 3761-017-1115 | 1.90 ppb |
| 2014-09-03 | 3761-024-0730 | ND |
| 2014-09-03 | 3761-033-1240 | 3.00 ppb |
| 2014-09-03 | 3761-054-0755 | ND |
| 2014-09-03 | 3761-078-1305 | 2.90 ppb |
| 2014-09-26 | 3761-100-1200 | ND |
| 2014-12-16 | 3761-015-1245 | ND |
| 2014-12-16 | 3761-023-1300 | ND |
| 2015-03-10 | 201501300259AM | 3.60 ppb |
| 2015-03-10 | 201501300278AM | 1.70 ppb |
| 2015-03-10 | 201501300277AM | 3.40 ppb |
| 2015-03-10 | 201501300272AM | 0.280 ppb |
| 2015-03-10 | 201501300241AM | 0.210 ppb |
| 2015-03-10 | 201501300236AM | 3.70 ppb |
| 2015-03-10 | 201503110335AM | 2.00 ppb |
| 2015-03-10 | 201501300283AM | 0.210 ppb |
| 2015-03-10 | 201501300269AM | 2.40 ppb |
| 2015-03-10 | 201501300281AM | 3.80 ppb |
| 2015-03-10 | 201501300271AM | 2.70 ppb |
| 2015-03-10 | 201501300284AM | 4.20 ppb |
| 2015-03-10 | 201501300251AM | 0.290 ppb |
| 2015-03-10 | 201501300239AM | 2.70 ppb |
| 2015-03-10 | 201501300262AM | 2.50 ppb |
| 2015-03-10 | 201501300234AM | 2.90 ppb |
| 2015-03-10 | 201501300268AM | 0.700 ppb |
| 2015-03-10 | 201501300229AM | 0.0350 ppb |
| 2015-03-10 | 201501300256AM | 2.50 ppb |
| 2015-03-10 | 201501300274AM | 6.60 ppb |
| 2015-03-10 | 201501300231AM | 4.70 ppb |
| 2015-03-10 | 201501300233AM | 1.70 ppb |
| 2015-03-11 | 201501300228AM | 2.60 ppb |
| 2015-03-11 | 201501300230AM | 2.00 ppb |
| 2015-03-11 | 201501300246AM | 2.70 ppb |
| 2015-03-26 | 201501300254AM | 2.80 ppb |
| 2015-03-31 | 201501300247AM | 0.920 ppb |
| 2015-03-31 | 201501300235AM | 0.380 ppb |
| 2015-06-18 | 201501300338AM | 0.170 ppb |
| 2015-06-18 | 201501300295AM | 0.180 ppb |
| 2015-06-18 | 201506180525AM | 0.180 ppb |
| 2015-06-18 | 201506180527AM | 0.580 ppb |
| 2015-09-10 | 201501300398AM | 3.60 ppb |
| 2015-09-10 | 201501300401AM | 3.70 ppb |
| 2015-09-10 | 201501300417AM | 2.70 ppb |
| 2015-09-10 | 201501300399AM | 4.60 ppb |
| 2015-09-20 | 201501300397AM | 0.380 ppb |
| 2015-09-20 | 201501300371AM | 0.600 ppb |
| 2015-09-20 | 201501300408AM | 2.50 ppb |
| 2015-09-20 | 201501300382AM | 0.310 ppb |
| 2015-09-20 | 201501300386AM | 2.60 ppb |
| 2015-09-20 | 201501300418AM | 1.000 ppb |
| 2015-09-20 | 201501300394AM | 0.420 ppb |
| 2015-09-20 | 201501300388AM | 0.1000 ppb |
| 2015-09-21 | 201501300387AM | 0.710 ppb |
| 2015-09-21 | 201501300377AM | 2.40 ppb |
| 2015-09-21 | 201501300400AM | 0.410 ppb |
| 2015-09-21 | 201501300416AM | ND |
| 2015-09-21 | 201501300378AM | 0.720 ppb |
| 2015-09-22 | 201501300406AM | 0.580 ppb |
| 2015-09-22 | 201501300425AM | 2.50 ppb |
| 2015-09-22 | 201501300422AM | 6.10 ppb |
| 2015-09-22 | 201501300426AM | 1.60 ppb |
| 2015-09-24 | 201501300405AM | 3.40 ppb |
| 2015-09-24 | 201501300381AM | 0.150 ppb |
| 2015-09-24 | 201501300370AM | 0.830 ppb |
| 2015-09-24 | 201501300404AM | 0.730 ppb |
| 2015-09-28 | 201501300411AM | 2.10 ppb |
| 2015-09-28 | 201501300419AM | 0.340 ppb |
| 2015-09-28 | 201501300410AM | 0.240 ppb |
| 2015-12-09 | 201501300355AM | 0.190 ppb |
| 2015-12-09 | 201501300360AM | 0.180 ppb |
| 2016-06-22 | 3761-013-0945 | 3.90 ppb |
| 2016-06-23 | 3761-003-0940 | ND |
| 2016-09-21 | 3761-003-0915 | ND |
| 2016-09-21 | 3761-017-1300 | 2.40 ppb |
| 2016-09-21 | 3761-022-1415 | 3.80 ppb |
| 2016-09-21 | 3761-033-1130 | 2.60 ppb |
| 2016-09-21 | 3761-100-1240 | ND |
| 2017-01-25 | 3761-015-1410 | ND |
| 2017-03-02 | 3761-036-1035 | ND |
| 2017-03-02 | 3761-066-0950 | 1.20 ppb |
| 2017-03-02 | 3761-076-1015 | 5.80 ppb |
| 2017-03-10 | 3761-016-0700 | ND |
| 2017-04-12 | 3761-052-1120 | ND |
| 2017-07-11 | 3761-054-1445 | ND |
| 2017-07-11 | 3761-078-1115 | 2.00 ppb |
| 2017-07-13 | 3761-067-1125 | 5.80 ppb |
| 2017-09-26 | 3761-100-0900 | ND |
| 2018-10-22 | 3761-100-1255 | ND |
| 2018-11-14 | 3761-037-1130 | 2.40 ppb |
| 2019-07-17 | 3761-013-1110 | 3.40 ppb |
| 2019-07-18 | 3761-025-1045 | ND |
| 2019-09-17 | 3761-017-1440 | 2.80 ppb |
| 2019-09-17 | 3761-022-1506 | 3.20 ppb |
| 2019-09-17 | 3761-033-1415 | 1.10 ppb |
| 2019-10-16 | 3761-100-1225 | ND |
| 2019-11-05 | 3761-006-0910 | 4.10 ppb |