Chromium (hexavalent)
City of Porterville
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).
101
Samples
0
Samples exceeding legal limit (MCL)
62
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | 0.578 ppb | 35 | 31 | ND - 5.40 ppb |
| 2014 | 0.457 ppb | 32 | 27 | ND - 3.70 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 1 | 0 | ND |
| 2017 | 0.345 ppb | 33 | 4 | ND - 5.00 ppb |
| 2018 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2013-09-16 | B3I1567-13 | 0.210 ppb |
| 2013-09-16 | B3I1567-01 | 0.0740 ppb |
| 2013-09-16 | B3I1567-04 | ND |
| 2013-09-16 | B3I1567-10 | 0.320 ppb |
| 2013-09-16 | B3I1567-16 | 0.690 ppb |
| 2013-09-16 | B3I1567-23 | 0.290 ppb |
| 2013-09-16 | B3I1567-21 | 1.000 ppb |
| 2013-09-16 | B3I1567-19 | 0.750 ppb |
| 2013-09-16 | B3I1567-07 | 0.400 ppb |
| 2013-09-17 | B3I1806-07 | 0.600 ppb |
| 2013-09-17 | B3I1806-04 | 0.800 ppb |
| 2013-09-17 | B3I1806-13 | 0.0770 ppb |
| 2013-09-17 | B3I1806-19 | 0.0510 ppb |
| 2013-09-17 | B3I1806-01 | 0.0370 ppb |
| 2013-09-17 | B3I1806-28 | 0.170 ppb |
| 2013-09-17 | B3I1806-16 | 0.210 ppb |
| 2013-09-17 | B3I1806-25 | 0.430 ppb |
| 2013-09-17 | B3I1806-22 | ND |
| 2013-09-17 | B3I1806-10 | 0.210 ppb |
| 2013-09-18 | B3I1853-10 | ND |
| 2013-09-18 | B3I1853-13 | 0.190 ppb |
| 2013-09-18 | B3I1853-25 | 0.470 ppb |
| 2013-09-18 | B3I1853-04 | 0.140 ppb |
| 2013-09-18 | B3I1853-01 | 2.30 ppb |
| 2013-09-18 | B3I1853-07 | 3.70 ppb |
| 2013-09-18 | B3I1853-19 | 0.0510 ppb |
| 2013-09-18 | B3I1853-22 | 0.650 ppb |
| 2013-09-18 | B3I1853-16 | ND |
| 2013-09-19 | B3I1957-13 | 0.480 ppb |
| 2013-09-19 | B3I1957-10 | 0.0560 ppb |
| 2013-09-19 | B3I1957-07 | 5.40 ppb |
| 2013-09-19 | B3I1957-01 | 0.140 ppb |
| 2013-09-19 | B3I1957-04 | 0.0560 ppb |
| 2013-09-26 | B3I2610-01 | 0.240 ppb |
| 2013-09-26 | B3I2610-04 | 0.0300 ppb |
| 2014-03-10 | 4790-020-0850 | 0.160 ppb |
| 2014-03-10 | 4790-039-1445 | 0.150 ppb |
| 2014-03-10 | 4790-056-0955 | ND |
| 2014-03-10 | 4790-079-1250 | ND |
| 2014-03-11 | 4790-008-1230 | 0.550 ppb |
| 2014-03-11 | 4790-018-1315 | 0.490 ppb |
| 2014-03-11 | 4790-019-1145 | 1.20 ppb |
| 2014-03-11 | 4790-021-1000 | 0.260 ppb |
| 2014-03-11 | 4790-033-0915 | 0.230 ppb |
| 2014-03-12 | 4790-014-1500 | 2.00 ppb |
| 2014-03-12 | 4790-082-1230 | 0.0610 ppb |
| 2014-03-12 | 4790-088-0920 | 0.0710 ppb |
| 2014-03-12 | 4790-090-1030 | 0.140 ppb |
| 2014-03-13 | 4790-003-1215 | ND |
| 2014-03-13 | 4790-037-1430 | 0.970 ppb |
| 2014-03-13 | 4790-049-1340 | 0.320 ppb |
| 2014-03-17 | 4790-005-1425 | 2.80 ppb |
| 2014-03-17 | 4790-006-1450 | 0.140 ppb |
| 2014-03-17 | 4790-023-1130 | 0.210 ppb |
| 2014-03-17 | 4790-026-1037 | 0.0540 ppb |
| 2014-03-17 | 4790-092-1345 | 0.0590 ppb |
| 2014-03-18 | 4790-010-1350 | 0.110 ppb |
| 2014-03-18 | 4790-013-1440 | 0.240 ppb |
| 2014-03-18 | 4790-024-1100 | 3.70 ppb |
| 2014-03-18 | 4790-096-0940 | 0.0330 ppb |
| 2014-03-20 | 4790-009-0950 | 0.0350 ppb |
| 2014-03-20 | 4790-025-1130 | 0.0820 ppb |
| 2014-03-20 | 4790-032-1515 | 0.0690 ppb |
| 2014-03-20 | 4790-040-1430 | 0.150 ppb |
| 2014-03-20 | 4790-054-1300 | 0.350 ppb |
| 2014-03-20 | 4790-086-1040 | ND |
| 2014-05-14 | 4790-022-1015 | ND |
| 2016-03-11 | 5867-098-0925 | ND |
| 2017-03-15 | 5867-003-1425 | ND |
| 2017-03-15 | 5867-005-1405 | 2.80 ppb |
| 2017-03-15 | 5867-008-1455 | ND |
| 2017-03-15 | 5867-019-0940 | 1.40 ppb |
| 2017-03-15 | 5867-020-0830 | ND |
| 2017-03-15 | 5867-021-0945 | ND |
| 2017-03-15 | 5867-022-1345 | ND |
| 2017-03-15 | 5867-033-1415 | ND |
| 2017-03-15 | 5867-039-0845 | ND |
| 2017-03-15 | 5867-049-1040 | ND |
| 2017-03-15 | 5867-082-1325 | ND |
| 2017-03-15 | 5867-086-1200 | ND |
| 2017-03-15 | 5867-096-1015 | ND |
| 2017-03-16 | 5867-013-1230 | ND |
| 2017-03-16 | 5867-018-1145 | ND |
| 2017-03-16 | 5867-024-1020 | 5.00 ppb |
| 2017-03-16 | 5867-025-1105 | ND |
| 2017-03-16 | 5867-056-1345 | ND |
| 2017-03-16 | 5867-079-1305 | ND |
| 2017-03-16 | 5867-088-0940 | ND |
| 2017-03-16 | 5867-098-0920 | ND |
| 2017-03-16 | 5867-100-1105 | ND |
| 2017-05-10 | 5867-006-1330 | ND |
| 2017-05-10 | 5867-009-0930 | ND |
| 2017-05-10 | 5867-010-1200 | ND |
| 2017-05-10 | 5867-014-1000 | 2.20 ppb |
| 2017-05-10 | 5867-023-1030 | ND |
| 2017-05-10 | 5867-026-0840 | ND |
| 2017-05-10 | 5867-032-1130 | ND |
| 2017-05-10 | 5867-054-1425 | ND |
| 2017-05-10 | 5867-090-1100 | ND |
| 2017-05-10 | 5867-092-0900 | ND |
| 2017-05-11 | 5867-040-1250 | ND |