Chromium (total)

California Water Service (CWS) - Visalia

Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

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239

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	0.732 ppb	94	78	ND - 3.20 ppb
2015	0.531 ppb	54	31	ND - 3.30 ppb
2016	ND	26	0	ND
2017	ND	16	0	ND
2018	ND	21	0	ND
2019	ND	28	0	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-01-21	5810-017-1152	ND
2014-01-21	5810-023-0830	ND
2014-04-01	A4C1081-09A	2.80 ppb
2014-04-01	A4C1081-01A	0.630 ppb
2014-04-01	A4C1081-17A	0.620 ppb
2014-04-01	A4C1081-19A	1.000 ppb
2014-04-02	5810-018-0815	ND
2014-04-03	A4C1081-13A	0.350 ppb
2014-04-07	5810-024-0910	ND
2014-04-08	A4C1253-01A	0.860 ppb
2014-04-08	A4C1253-21A	0.480 ppb
2014-04-13	A4C1476-13A	0.520 ppb
2014-04-13	A4C1476-01A	0.400 ppb
2014-04-15	A4C1476-09A	ND
2014-04-15	A4C1476-17A	0.930 ppb
2014-04-16	A4C1476-19A	0.600 ppb
2014-04-22	A4C1796-05A	0.460 ppb
2014-04-24	A4C1796-01A	0.420 ppb
2014-04-24	A4C1796-13A	0.450 ppb
2014-04-25	A4C1796-09A	0.710 ppb
2014-05-06	A4C2018-09A	0.980 ppb
2014-05-07	A4C2018-13A	0.930 ppb
2014-05-07	A4C2018-17A	0.620 ppb
2014-05-07	A4C2018-01A	1.10 ppb
2014-05-08	A4C2018-05A	1.10 ppb
2014-05-08	A4C2018-21A	0.650 ppb
2014-05-08	A4C2018-33A	0.650 ppb
2014-05-09	A4C2018-25A	2.40 ppb
2014-05-12	5810-054-0942	ND
2014-05-13	A4D0061-01A	0.970 ppb
2014-05-14	A4D0061-09A	0.870 ppb
2014-05-14	A4D0061-29A	1.30 ppb
2014-05-14	A4D0061-27A	0.940 ppb
2014-05-14	A4D0061-25A	0.830 ppb
2014-05-19	A4D1188-05A	0.230 ppb
2014-05-19	A4D1188-13A	0.880 ppb
2014-05-21	A4D1188-17A	0.840 ppb
2014-05-22	A4D1188-09A	1.10 ppb
2014-05-22	A4D1188-19A	1.000 ppb
2014-05-27	5701-075-1350	3.20 ppb
2014-06-02	A4D1544-05A	0.780 ppb
2014-06-02	A4D1544-01A	0.760 ppb
2014-06-05	A4D1544-09A	1.80 ppb
2014-06-10	5810-099-1210	ND
2014-06-16	A4E2267-01A	0.730 ppb
2014-06-17	5701-182-1254	2.15 ppb
2014-06-18	A4E2262-01A	1.20 ppb
2014-06-18	A4E2269-01A	0.750 ppb
2014-06-19	A4E2265-01A	0.440 ppb
2014-06-23	A4F1344-01A	0.390 ppb
2014-06-24	A4F1344-05A	0.220 ppb
2014-07-07	5810-065-0900	ND
2014-07-17	5810-066-1310	ND
2014-09-15	5810-070-0842	ND
2014-09-16	5810-182-0900	ND
2014-09-22	5810-060-1005	ND
2014-09-22	5701-060-1015	1.17 ppb
2014-09-22	5810-069-1245	ND
2014-10-13	5810-022-0959	ND
2014-10-14	A4J0086-01A	0.740 ppb
2014-10-14	A4J0089-01A	0.430 ppb
2014-10-15	5810-014-0840	ND
2014-10-19	A4J1139-01A	0.340 ppb
2014-10-20	A4J1142-01A	0.320 ppb
2014-10-22	A4J1144-01A	0.380 ppb
2014-10-22	A4J1143-01A	0.730 ppb
2014-11-05	5810-076-1405	ND
2014-11-30	A4K1839-01A	1.30 ppb
2014-12-01	A4K1842-01A	2.00 ppb
2014-12-02	A4K1841-01A	1.20 ppb
2014-12-03	A4K1838-01A	0.840 ppb
2014-12-03	A4K1846-01A	0.660 ppb
2014-12-03	A4K1845-01A	0.730 ppb
2014-12-08	A4K2207-01A	1.30 ppb
2014-12-08	A4K2083-01A	0.760 ppb
2014-12-08	A4K2085-01A	0.280 ppb
2014-12-09	A4K2212-01A	1.50 ppb
2014-12-09	A4K2208-01A	0.520 ppb
2014-12-09	A4K2214-01A	0.870 ppb
2014-12-10	A4K2211-01A	0.860 ppb
2014-12-10	A4K2217-01A	0.420 ppb
2014-12-10	A4K2216-01A	0.680 ppb
2014-12-11	A4K2209-01A	0.500 ppb
2014-12-11	A4L0265-01A	0.770 ppb
2014-12-12	A4L0263-01A	0.820 ppb
2014-12-12	A4L0262-01A	0.830 ppb
2014-12-12	A4L0261-01A	0.920 ppb
2014-12-12	A4K2210-01A	0.700 ppb
2014-12-15	A4L0257-01A	0.840 ppb
2014-12-15	A4L0258-01A	0.680 ppb
2014-12-17	A4L0264-01A	0.980 ppb
2014-12-18	A4L0259-01A	0.900 ppb
2014-12-18	A4L0260-01A	0.710 ppb
2014-12-22	A4L0256-01A	1.10 ppb
2015-01-11	A4L1549-01A	1.000 ppb
2015-01-18	5810-003-1327	ND
2015-01-18	5810-015-1401	ND
2015-01-20	A4L1543-01A	0.690 ppb
2015-01-20	A4L1546-01A	0.670 ppb
2015-01-22	A4L1554-01A	0.900 ppb
2015-01-22	A4L1556-01A	0.720 ppb
2015-01-25	A4L0804-01A	0.670 ppb
2015-01-26	5810-027-1200	ND
2015-01-27	A4L1551-01A	0.670 ppb
2015-01-27	A4L1542-01A	0.550 ppb
2015-01-27	A4L1540-01A	0.680 ppb
2015-02-02	5810-016-1245	ND
2015-02-02	5810-029-1200	ND
2015-02-02	5810-156-0920	ND
2015-02-04	5810-031-1000	ND
2015-02-04	5810-044-1125	ND
2015-02-24	A5B2054-01A	0.620 ppb
2015-02-24	A5B2055-01A	0.950 ppb
2015-02-24	A5B2057-01A	0.300 ppb
2015-02-24	A5B2056-01A	ND
2015-03-02	A5B0003-01A	0.590 ppb
2015-03-04	A5C0417-01A	0.320 ppb
2015-03-15	A4L1552-01A	2.10 ppb
2015-04-06	5810-091-1115	ND
2015-04-08	5810-030-1115	ND
2015-04-16	201504170411AM	0.550 ppb
2015-04-16	201504170369AM	0.550 ppb
2015-04-21	201504220289AM	0.810 ppb
2015-04-22	201504230177AM	0.440 ppb
2015-04-23	201504240283AM	1.30 ppb
2015-04-26	201504280168AM	1.10 ppb
2015-05-11	5810-177-1016	ND
2015-05-12	5810-045-1115	ND
2015-05-19	201505210445AM	1.10 ppb
2015-05-20	201505210547AM	0.540 ppb
2015-05-20	201505210576AM	0.940 ppb
2015-05-28	201505290272AM	1.30 ppb
2015-06-09	5701-182-0915	3.30 ppb
2015-06-11	201506120201AM	1.90 ppb
2015-06-12	5810-090-0802	ND
2015-07-06	201507070577AM	0.940 ppb
2015-07-14	5810-026-0810	ND
2015-07-16	5810-179-1110	ND
2015-08-10	5810-040-1235	ND
2015-08-13	5810-094-1210	ND
2015-08-27	A5H2617-01A	1.20 ppb
2015-09-10	5810-089-1025	ND
2015-09-10	5810-093-1005	ND
2015-09-10	5810-098-1115	ND
2015-11-04	5810-035-0800	ND
2015-12-15	5810-064-1030	ND
2015-12-16	201512170410AM	0.440 ppb
2015-12-20	201512230703AM	0.840 ppb
2016-01-12	5701-027-1205	ND
2016-02-09	5810-057-0850	ND
2016-03-07	5810-028-0810	ND
2016-03-08	5810-061-1240	ND
2016-03-10	5810-036-1240	ND
2016-03-10	5810-159-1215	ND
2016-03-14	5810-059-1130	ND
2016-04-07	5810-067-1235	ND
2016-05-03	5810-081-1259	ND
2016-05-05	5810-046-1050	ND
2016-05-05	5810-055-1025	ND
2016-05-09	5810-012-1250	ND
2016-05-24	5701-182-1010	ND
2016-06-08	5810-056-1240	ND
2016-06-08	5810-058-0950	ND
2016-06-28	5810-167-1140	ND
2016-07-12	5810-158-1240	ND
2016-07-13	5810-010-0832	ND
2016-07-21	5810-154-0955	ND
2016-08-08	5810-053-1100	ND
2016-08-11	5810-048-1005	ND
2016-09-08	5810-080-1115	ND
2016-09-08	5810-092-1045	ND
2016-09-08	5810-166-1005	ND
2016-11-07	5810-178-1200	ND
2016-11-10	5810-037-0905	ND
2017-01-09	5810-017-1105	ND
2017-01-17	5810-023-0905	ND
2017-04-10	5810-024-0855	ND
2017-04-11	5810-018-1220	ND
2017-05-08	5810-054-1000	ND
2017-05-18	5810-043-0930	ND
2017-07-05	5810-065-0850	ND
2017-07-10	5810-066-1220	ND
2017-08-17	5810-014-0805	ND
2017-09-05	5810-047-1240	ND
2017-09-12	5810-064-1115	ND
2017-09-13	5810-060-1245	ND
2017-09-13	5810-069-1217	ND
2017-09-13	5810-070-0912	ND
2017-09-13	5810-182-0930	ND
2017-10-11	5810-022-1210	ND
2018-01-23	5810-015-1250	ND
2018-02-06	5810-044-1250	ND
2018-02-08	5810-029-1005	ND
2018-02-08	5810-031-1110	ND
2018-03-15	5701-028-1030	ND
2018-03-15	5810-028-1040	ND
2018-04-12	5810-030-1220	ND
2018-04-19	5810-091-1400	ND
2018-05-07	5810-045-1100	ND
2018-05-10	5810-156-0920	ND
2018-05-14	5810-027-1055	ND
2018-06-26	5810-090-0830	ND
2018-07-17	5810-179-1030	ND
2018-07-18	5810-026-0925	ND
2018-08-09	5810-040-0925	ND
2018-08-09	5810-094-1050	ND
2018-08-21	9590-089-1235	ND
2018-09-13	5810-093-0820	ND
2018-09-13	5810-098-0850	ND
2018-11-14	5810-035-0815	ND
2018-12-28	5810-087-0958	ND
2019-02-14	5810-167-0915	ND
2019-02-21	5810-057-1250	ND
2019-03-07	5701-182-1210	ND
2019-03-11	5810-037-1040	ND
2019-03-14	5810-159-0930	ND
2019-03-21	5810-036-1110	ND
2019-03-21	5701-059-1035	ND
2019-03-26	5810-059-1008	ND
2019-04-01	5810-061-1222	ND
2019-04-22	5810-067-0830	ND
2019-05-13	5810-081-1125	ND
2019-05-16	5810-046-1050	ND
2019-05-16	5810-055-1010	ND
2019-06-12	5810-056-1110	ND
2019-06-12	5810-058-0945	ND
2019-07-17	5810-010-0706	ND
2019-07-17	5810-016-1146	ND
2019-07-17	5810-154-1044	ND
2019-07-17	5810-158-0933	ND
2019-08-15	5810-048-1110	ND
2019-08-16	5810-053-1110	ND
2019-08-28	5810-016-1305	ND
2019-08-29	5810-047-1030	ND
2019-09-13	5810-092-1126	ND
2019-09-13	5810-166-1040	ND
2019-09-17	5810-080-1155	ND
2019-10-17	5810-003-1225	ND
2019-11-18	5810-178-1120	ND