2,4,5-T

Calleguas Municipal Water District

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.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	6	ND
2015	ND	6	ND
2016	ND	6	ND
2017	ND	6	ND
2018	ND	6	ND
2019	ND	6	ND

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-01-10	5867-010-1130	ND
2014-01-10	5867-006-0945	ND
2014-03-21	5867-007-1125	ND
2014-04-11	5867-009-1010	ND
2014-04-18	5867-011-1030	ND
2014-11-18	5867-008-1315	ND
2015-02-19	5867-017-1415	ND
2015-10-21	5867-014-1020	ND
2015-10-27	5867-012-1030	ND
2015-10-27	5867-016-1130	ND
2015-10-27	5867-015-1300	ND
2015-11-05	5867-013-1140	ND
2016-04-05	5867-023-1000	ND
2016-04-05	5867-022-0930	ND
2016-04-06	5867-021-1150	ND
2016-04-06	5867-020-1305	ND
2016-04-06	5867-018-1100	ND
2016-04-06	5867-019-1030	ND
2017-04-17	5867-008-1005	ND
2017-04-17	5867-009-1245	ND
2017-04-18	5867-006-1130	ND
2017-04-19	5867-011-1050	ND
2017-11-06	5867-007-1015	ND
2017-11-06	5867-010-1120	ND
2018-02-13	5867-016-0945	ND
2018-02-13	5867-015-1050	ND
2018-03-07	5867-013-1320	ND
2018-03-08	5867-014-1330	ND
2018-03-08	5867-012-1000	ND
2018-04-30	5867-017-1030	ND
2019-02-04	5867-018-0945	ND
2019-02-05	5867-023-0945	ND
2019-02-05	5867-022-1020	ND
2019-02-07	5867-020-0840	ND
2019-02-11	5867-021-0930	ND
2019-02-19	5867-019-1100	ND