Chlorpyriphos

City of Moses Lake

Chlorpyrifos is an organophosphate pesticide that has been widely used, but in 2021, application on food crops was banned by the EPA. Exposure to chlorpyrifos during pregnancy and early life harms the developing brain, including reduced IQ, delayed development of motor and sensory functions, and social and behavioral dysfunction.

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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	N/A	0	N/A
2015	N/A	0	N/A
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	ND	28	ND
2019	ND	7	ND

ppb = parts per billion

All test results

Date	Lab ID	Result
2018-02-06	201802071012	ND
2018-02-06	201802071013	ND
2018-02-06	201802071072	ND
2018-02-06	201802071073	ND
2018-02-06	201802071071	ND
2018-02-27	201802280388	ND
2018-04-03	201804040784	ND
2018-04-03	201804040869	ND
2018-04-04	201804050370	ND
2018-04-04	201804050528	ND
2018-04-04	201804050571	ND
2018-04-04	201804050525	ND
2018-04-04	201804050619	ND
2018-04-04	201804050403	ND
2018-05-15	201805170734	ND
2018-05-30	201805310564	ND
2018-06-20	201806210479	ND
2018-08-27	201808280709	ND
2018-08-29	201808300754	ND
2018-08-29	201808300748	ND
2018-10-11	201810120477	ND
2018-10-11	201810120478	ND
2018-11-26	201811270282	ND
2018-11-28	201811290285	ND
2018-12-06	201812070104	ND
2018-12-07	201812080154	ND
2018-12-13	201812140245	ND
2018-12-13	201812140138	ND
2019-01-10	201901110310	ND
2019-01-10	201901110396	ND
2019-02-06	201902070643	ND
2019-02-06	201902070748	ND
2019-02-06	201902070749	ND
2019-02-28	201903010173	ND
2019-03-06	201903070199	ND