Trichloroethylene

City of Corona

Trichloroethylene, an industrial solvent and common groundwater pollutant, damages the immune system, harms the developing fetus and causes cancer. Read More.

Trichloroethylene was once commonly used to remove grease from metal parts, such as steel pipes and engines, and as a solvent in dry cleaning and carpet cleaning products. Drinking trichloroethylene-contaminated drinking water has been linked with birth defects, leukemia, and liver and kidney damage. Trichloroethylene is highly volatile and can enter indoor air through water in pipes. If trichloroethylene is present, people can inhale it while bathing, washing dishes and doing other household activities that involve water.

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MORE ABOUT THIS CONTAMINANT

174

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2013	N/A	0	0	N/A
2014	0.326 ppb	37	10	ND - 1.70 ppb
2015	ND	28	0	ND - 1.70 ppb
2016	0.347 ppb	27	8	ND - 1.60 ppb
2017	0.304 ppb	30	8	ND - 1.70 ppb
2018	0.435 ppb	26	10	ND - 1.60 ppb
2019	0.410 ppb	26	11	ND - 1.50 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.4 ppb

The EWG Health Guideline of 0.4 ppb for trichloroethylene was defined by the state of Minnesota as health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. This health guideline protects against harm to the developing fetus and damage to the immune system.

EPA Maximum Contaminant
Level (MCL) 5 ppb

The legal limit for trichloroethylene, established in 1987, was based on analytical detection limits at the time that the standard was set. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-01-07	9590-062-1330	ND
2014-02-12	9590-021-0900	1.40 ppb
2014-02-12	9590-027-1020	0.950 ppb
2014-02-12	9590-028-1450	ND
2014-02-12	9590-039-1100	0.570 ppb
2014-02-12	9590-052-1145	ND
2014-02-12	9590-054-1355	ND
2014-02-26	9590-030-0730	1.20 ppb
2014-03-12	9590-055-1120	1.60 ppb
2014-03-13	9590-034-1005	ND
2014-03-13	9590-041-1040	ND
2014-03-25	9590-062-1455	ND
2014-05-14	9590-024-1325	1.10 ppb
2014-05-14	9590-038-1035	ND
2014-05-14	9590-043-0915	ND
2014-05-15	9590-019-1155	ND
2014-05-15	9590-022-0850	ND
2014-05-15	9590-023-1005	ND
2014-05-15	9590-034-1500	ND
2014-06-12	9590-034-0728	ND
2014-06-12	9590-041-0748	ND
2014-06-17	9590-062-1340	ND
2014-08-13	9590-015-0930	1.40 ppb
2014-08-13	9590-031-1455	1.70 ppb
2014-08-13	9590-032-1100	0.750 ppb
2014-08-13	9590-033-1315	1.40 ppb
2014-08-21	9590-029-0900	ND
2014-08-26	9590-003-1400	ND
2014-08-27	9590-014-1315	ND
2014-08-27	9590-056-1415	ND
2014-08-28	9590-013-1030	ND
2014-09-11	9590-034-0720	ND
2014-09-11	9590-041-0800	ND
2014-09-16	9590-054-1500	ND
2014-09-16	9590-062-0830	ND
2014-12-04	9590-034-0800	ND
2014-12-04	9590-041-0850	ND
2015-02-03	9590-030-1000	ND
2015-02-12	9590-028-1420	ND
2015-02-12	9590-052-1330	ND
2015-03-05	9590-034-0740	ND
2015-03-05	9590-041-0950	ND
2015-03-12	9590-062-1100	ND
2015-05-28	9590-003-0940	ND
2015-05-28	9590-019-1045	ND
2015-05-28	9590-034-0830	ND
2015-05-28	9590-038-1000	ND
2015-05-28	9590-043-1100	ND
2015-06-01		ND*
2015-06-09	9590-062-0815	ND
2015-06-11	9590-034-0810	ND
2015-06-11	9590-041-0850	ND
2015-06-18	9590-062-1245	ND
2015-08-12	9590-029-0900	ND
2015-08-12	9590-056-0940	ND
2015-08-20	9590-013-0900	ND
2015-08-20	9590-014-1430	ND
2015-09-01	9590-062-1100	ND
2015-09-22	9590-034-0810	ND
2015-09-22	9590-041-1105	ND
2015-10-14	9590-023-0930	ND
2015-10-14	9590-054-1330	ND
2015-12-08	9590-062-1410	ND
2015-12-17	9590-034-0800	ND
2015-12-17	9590-041-0900	ND
2016-03-10	9590-034-0750	ND
2016-03-10	9590-041-1520	ND
2016-03-22	9590-062-1215	ND
2016-04-13	9590-027-0950	1.30 ppb
2016-04-13	9590-028-0800	ND
2016-04-13	9590-030-0850	1.20 ppb
2016-04-21	9590-054-1340	ND
2016-04-27	9590-062-1320	ND
2016-06-02	9590-034-0800	ND
2016-06-02	9590-041-1330	ND
2016-06-14	9590-062-1430	ND
2016-07-20	9590-039-1045	0.610 ppb
2016-08-18	9590-003-1000	ND
2016-08-18	9590-023-1050	ND
2016-08-18	9590-038-1400	ND
2016-08-23	9590-024-1430	1.20 ppb
2016-08-24	9590-019-1030	ND
2016-08-24	9590-034-0900	ND
2016-08-24	9590-043-1430	ND
2016-09-13	9590-062-1020	ND
2016-10-11	9590-031-1530	1.50 ppb
2016-10-12	9590-032-1430	0.760 ppb
2016-10-20	9590-029-1400	ND
2016-10-27	9590-014-0915	ND
2016-10-27	9590-015-1020	1.20 ppb
2016-10-27	9590-033-1400	1.60 ppb
2016-10-27	9590-056-0840	ND
2017-01-12	9590-062-1520	ND
2017-03-09	9590-034-0820	ND
2017-03-09	9590-041-1520	ND
2017-03-21	9590-062-1540	ND
2017-04-12	9590-030-1000	1.20 ppb
2017-04-12	9590-054-1400	ND
2017-04-12	9590-062-1500	ND
2017-04-20	9590-027-1400	1.20 ppb
2017-04-20	9590-038-0920	ND
2017-04-20	9590-039-1500	0.520 ppb
2017-06-06	9590-062-1550	ND
2017-06-13	9590-034-1215	ND
2017-06-13	9590-041-1200	ND
2017-08-09	9590-019-1030	ND
2017-08-09	9590-023-0945	ND
2017-08-09	9590-024-1400	1.20 ppb
2017-08-09	9590-043-1530	ND
2017-08-10	9590-034-1220	ND
2017-09-13	9590-034-0800	ND
2017-09-13	9590-041-1600	ND
2017-09-19	9590-062-1500	ND
2017-10-12	9590-015-1500	1.20 ppb
2017-10-12	9590-031-0930	1.70 ppb
2017-10-12	9590-032-1030	0.700 ppb
2017-10-19	9590-014-1030	ND
2017-10-19	9590-029-1500	ND
2017-10-19	9590-056-1400	ND
2017-10-26	9590-033-1000	1.40 ppb
2017-12-19	9590-034-0810	ND
2017-12-19	9590-041-1050	ND
2018-02-14	9590-030-1340	1.000 ppb
2018-02-14	9590-032-1445	0.590 ppb
2018-03-08	9590-034-0820	ND
2018-03-08	9590-041-1450	ND
2018-04-18	9590-039-1600	ND
2018-04-26	9590-027-1230	1.20 ppb
2018-04-26	9590-038-1020	ND
2018-06-19	9590-034-0830	ND
2018-06-19	9590-041-1120	ND
2018-06-27	9590-021-1500	1.10 ppb
2018-08-16	9590-024-1100	0.960 ppb
2018-08-16	9590-055-1400	1.60 ppb
2018-08-22	9590-019-1500	ND
2018-08-22	9590-034-0900	ND
2018-08-22	9590-043-1030	ND
2018-09-18	9590-034-1430	ND
2018-09-18	9590-041-1305	ND
2018-10-10	9590-014-1410	ND
2018-10-10	9590-029-1500	ND
2018-10-10	9590-031-1100	1.20 ppb
2018-10-25	9590-033-1530	1.40 ppb
2018-10-25	9590-056-0930	ND
2018-11-15	9590-071-1500	1.30 ppb
2018-12-11	9590-015-1120	0.960 ppb
2018-12-18	9590-034-0740	ND
2018-12-18	9590-041-1540	ND
2019-02-13	9590-029-1000	ND
2019-02-13	9590-030-1300	1.10 ppb
2019-02-13	9590-031-1430	1.50 ppb
2019-02-13	9590-056-0900	0.540 ppb
2019-02-14	9590-032-1330	0.700 ppb
2019-03-19	9590-034-0640	ND
2019-03-19	9590-041-0720	ND
2019-04-24	9590-015-0910	0.900 ppb
2019-04-24	9590-021-1330	0.870 ppb
2019-05-22	9590-014-1030	ND
2019-05-22	9590-033-0830	1.40 ppb
2019-05-22	9590-039-1530	ND
2019-05-22	9590-055-1450	1.20 ppb
2019-05-23	9590-024-1130	0.810 ppb
2019-05-30	9590-027-1400	1.10 ppb
2019-06-18	9590-034-0800	ND
2019-06-18	9590-041-1100	ND
2019-09-17	9590-034-0755	ND
2019-09-17	9590-041-1030	ND
2019-09-26	9590-038-0810	ND
2019-10-09	9590-019-1030	ND
2019-10-09	9590-034-0718	ND
2019-10-09	9590-043-0918	ND
2019-10-09	9590-072-1150	0.550 ppb
2019-12-17	9590-034-0645	ND
2019-12-17	9590-041-1045	ND

* Sample result is taken from the system's CCR report.