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EWG's Tap Water Database — 2019 UPDATE

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Nitrate

City of Puyallup

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

 

42

Samples

0

Samples exceeding legal limit (MCL)

18

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.743 ppm73ND - 2.90 ppm
20131.000 ppm73ND - 3.10 ppm
20141.07 ppm73ND - 3.10 ppm
20151.04 ppm73ND - 3.10 ppm
20160.988 ppm83ND - 3.20 ppm
20171.18 ppm63ND - 3.10 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.

EPA Maximum Contaminant
Level (MCL) 10 ppm

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2012-06-1943333ND
2012-06-19433392.90 ppm
2012-06-1943338ND
2012-06-1943337ND
2012-06-19433361.20 ppm
2012-06-1943335ND
2012-06-19433341.10 ppm
2013-07-16486303.10 ppm
2013-07-1648629ND
2013-07-1648628ND
2013-07-1648627ND
2013-07-1648626ND
2013-07-16486252.70 ppm
2013-07-16486241.20 ppm
2014-07-08528873.00 ppm
2014-07-0852888ND
2014-07-08528893.10 ppm
2014-07-0952923ND
2014-07-0952922ND
2014-07-0952921ND
2014-12-08550121.40 ppm
2015-07-08576043.10 ppm
2015-07-08576031.20 ppm
2015-07-0857605ND
2015-07-08576013.00 ppm
2015-07-0857600ND
2015-07-0857599ND
2015-07-0857602ND
2016-07-19ND
2016-07-19ND
2016-07-19ND
2016-07-193.10 ppm
2016-07-193.20 ppm
2016-07-191.60 ppm
2016-08-09ND
2016-09-28ND
2017-06-20ND
2017-06-20ND
2017-06-202.60 ppm
2017-06-20ND
2017-06-203.10 ppm
2017-06-201.40 ppm