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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Boone County Cons. PWSD1

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

MORE ABOUT THIS CONTAMINANT

 

78

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
20140.00215 ppm132ND - 0.0150 ppm
2015ND130ND
20160.00346 ppm133ND - 0.0180 ppm
20170.00508 ppm135ND - 0.0170 ppm
20180.00408 ppm134ND - 0.0160 ppm
20190.00308 ppm132ND - 0.0210 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL) 10 ppm

ppm = parts per million

All test results

Date Lab ID Result
2014-02-26AC18621ND
2014-02-26AC18620ND
2014-02-26AC18633ND
2014-02-26AC18632ND
2014-02-26AC18631ND
2014-02-26AC186300.0130 ppm
2014-02-26AC18628ND
2014-02-26AC18627ND
2014-02-26AC18626ND
2014-02-26AC18625ND
2014-02-26AC18624ND
2014-02-26AC186230.0150 ppm
2014-02-26AC18622ND
2015-02-19AC42200ND
2015-02-19AC42195ND
2015-02-19AC42203ND
2015-02-19AC42193ND
2015-02-19AC42202ND
2015-02-19AC42196ND
2015-02-19AC42198ND
2015-02-19AC42199ND
2015-02-19AC42194ND
2015-02-19AC42201ND
2015-02-19AC42204ND
2015-02-19AC42192ND
2015-02-19AC42197ND
2016-02-08AC666340.0120 ppm
2016-02-08AC66641ND
2016-02-08AC66642ND
2016-02-08AC66643ND
2016-02-08AC666310.0180 ppm
2016-02-08AC66632ND
2016-02-08AC66633ND
2016-02-08AC66636ND
2016-02-08AC66637ND
2016-02-08AC66640ND
2016-02-08AC66638ND
2016-02-08AC66635ND
2016-02-08AC666390.0150 ppm
2017-02-17AC91075ND
2017-02-17AC91083ND
2017-02-17AC91087ND
2017-02-17AC91086ND
2017-02-17AC91082ND
2017-02-17AC91081ND
2017-02-17AC91079ND
2017-02-17AC910840.0170 ppm
2017-02-17AC91080ND
2017-02-17AC910780.0130 ppm
2017-02-17AC910850.0130 ppm
2017-02-17AC910760.0110 ppm
2017-02-17AC910770.0120 ppm
2018-03-07AD14476ND
2018-03-07AD144770.0110 ppm
2018-03-07AD144740.0160 ppm
2018-03-07AD14473ND
2018-03-07AD14472ND
2018-03-07AD144710.0110 ppm
2018-03-07AD14468ND
2018-03-07AD14475ND
2018-03-07AD14467ND
2018-03-07AD14469ND
2018-03-07AD14465ND
2018-03-07AD144700.0150 ppm
2018-05-24AD26903ND
2019-02-08AD39652ND
2019-02-08AD39651ND
2019-02-08AD39650ND
2019-02-08AD396490.0190 ppm
2019-02-08AD39648ND
2019-02-08AD39647ND
2019-02-08AD39646ND
2019-02-08AD39645ND
2019-02-08AD39644ND
2019-02-08AD39643ND
2019-02-08AD39642ND
2019-02-08AD396410.0210 ppm
2019-02-08AD39640ND