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EWG's Tap Water Database — 2021 UPDATE

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Chlorpyriphos

City of Mesa

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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57

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND280ND
2019ND290ND

ppb = parts per billion

All test results

Date Lab ID Result
2018-07-09201807090174ND
2018-07-09201807090175ND
2018-07-10201807100364ND
2018-07-10201807100378ND
2018-07-10201807100363ND
2018-07-10201807100358ND
2018-07-11201807110664ND
2018-07-11201807110663ND
2018-07-16201807160187ND
2018-07-17201807180724ND
2018-07-17201807180725ND
2018-07-18201807180595ND
2018-07-18201807180594ND
2018-07-18201807180593ND
2018-07-24201807240958ND
2018-07-25201807250525ND
2018-07-25201807250526ND
2018-07-25201807250527ND
2018-08-16201808160552ND
2018-08-23201808230396ND
2018-08-23201808230395ND
2018-08-23201808230394ND
2018-08-23201808230393ND
2018-08-29201808290648ND
2018-09-25201809250387ND
2018-10-02201810020681ND
2018-10-02201810020683ND
2018-10-02201810020682ND
2019-01-03201901030520ND
2019-01-03201901030518ND
2019-01-03201901030519ND
2019-01-07201901080289ND
2019-01-07201901080290ND
2019-01-08201901080311ND
2019-01-09201901090426ND
2019-01-09201901090425ND
2019-01-09201901090424ND
2019-01-14201901150163ND
2019-01-15201901150166ND
2019-01-16201901160182ND
2019-01-16201901160181ND
2019-01-22201901220211ND
2019-01-22201901220212ND
2019-01-22201901220210ND
2019-01-23201901230460ND
2019-01-24201901240225ND
2019-01-24201901240226ND
2019-01-28201901280142ND
2019-01-28201901280141ND
2019-01-29201901290211ND
2019-01-30201901300421ND
2019-01-31201901310228ND
2019-03-14201903150354ND
2019-03-27201903280485ND
2019-04-02201904030051ND
2019-04-29201904300354ND
2019-04-29201904300353ND