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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

City of Show Low

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

 

69

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND100ND
2015ND90ND
2016ND80ND
2017ND110ND
20180.0171 ppm172ND - 0.150 ppm
20190.00146 ppm141ND - 0.0204 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
2014-01-177011679-01ND
2014-05-294052455-12ND
2014-05-294052455-11ND
2014-05-294052455-07ND
2014-05-294052455-05ND
2014-05-294052455-04ND
2014-05-294052455-02ND
2014-05-294052451-01ND
2014-07-224072123-03ND
2014-07-224072123-01ND
2015-09-145091270-01ND
2015-09-145091270-02ND
2015-09-145091270-03ND
2015-09-145091270-05ND
2015-09-145091270-11ND
2015-09-145091270-15ND
2015-09-145091270-08ND
2015-09-155091270-09ND
2015-09-155091270-07ND
2016-03-156031429-01ND
2016-03-156031428-01ND
2016-03-156031423-01IND
2016-03-296032507-01ND
2016-03-296032503-01ND
2016-03-296032510-01ND
2016-06-016060111-03ND
2016-06-016060111-01ND
2017-01-177011679-05ND
2017-01-177011679-13ND
2017-01-177011679-12ND
2017-01-177011679-11ND
2017-01-177011679-09ND
2017-01-177011679-08ND
2017-01-177011679-07ND
2017-01-177011679-06ND
2017-01-177011679-04ND
2017-01-177011679-03ND
2017-01-177011679-02ND
2018-01-1618A1815-02ND
2018-01-1618A1815-03ND
2018-01-1618A1815-04ND
2018-01-1618A1815-05ND
2018-01-1618A1815-06ND
2018-01-1618A1815-07ND
2018-01-1618A1815-08ND
2018-01-1618A1815-10ND
2018-01-1618A1815-11ND
2018-01-1618A1815-12ND
2018-01-1618A1815-13ND
2018-01-1618A1815-14ND
2018-01-1618A1815-15ND
2018-01-1618A1815-09ND
2018-04-0318D0522-01 IOCND
2018-09-1818I1881-01 IOC0.150 ppm
2018-10-3018J3236-01 IOC0.140 ppm
2019-01-0819A0949-010.0204 ppm
2019-01-0819A0949-02ND
2019-01-0819A0949-03ND
2019-01-0819A0949-04ND
2019-01-0819A0949-05ND
2019-01-0819A0949-06ND
2019-01-0819A0949-07ND
2019-01-0819A0949-08ND
2019-01-0819A0949-09ND
2019-01-0819A0949-10ND
2019-01-0819A0949-11ND
2019-01-0819A0949-12ND
2019-01-0819A0949-13ND
2019-04-1619D2079-12ND