2,4,5-T

California Water Service (CWS) - Los Altos Suburban

2,4,5-Trichlorophenoxyacetic acid (2,4,5-T) is a herbicide banned in the U.S. since 1985. It was formerly used on residential and commercial lawns, and occasionally on food crops. 2,4,5-T contained the impurity dioxin, which is highly toxic to people and wildlife.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2013	N/A	0	N/A
2014	ND	34	ND
2015	ND	2	ND
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	N/A	0	N/A
2019	N/A	0	N/A

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-01-08	5810-008-1130	ND
2014-01-15	5810-002-1204	ND
2014-01-15	5810-016-1140	ND
2014-02-10	5810-010-1151	ND
2014-02-19	5810-018-1000	ND
2014-02-27	5810-023-1106	ND
2014-03-04	5810-015-1228	ND
2014-03-05	5810-011-1133	ND
2014-04-08	5810-020-1119	ND
2014-04-09	5810-021-1343	ND
2014-04-17	5810-022-1230	ND
2014-05-14	5810-037-1403	ND
2014-05-21	5810-023-1215	ND
2014-06-04	5810-029-0855	ND
2014-06-04	5810-032-1143	ND
2014-06-04	5810-028-0923	ND
2014-06-04	5810-035-1100	ND
2014-06-04	5810-024-1033	ND
2014-07-02	5810-002-1000	ND
2014-07-02	5810-016-1052	ND
2014-07-09	5810-008-1015	ND
2014-08-11	5810-010-1048	ND
2014-08-11	5810-018-1010	ND
2014-09-09	5810-015-1130	ND
2014-09-09	5810-011-1312	ND
2014-10-01	5810-022-1357	ND
2014-10-02	5810-021-1312	ND
2014-10-02	5810-020-1228	ND
2014-11-05	5810-037-1335	ND
2014-12-10	5810-029-1133	ND
2014-12-10	5810-028-1227	ND
2014-12-10	5810-032-1314	ND
2014-12-10	5810-024-1301	ND
2014-12-10	5810-035-1134	ND
2015-02-03	5810-013-1129	ND
2015-03-10	5810-030-1323	ND