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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

United Water New York

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

 

93

Samples

0

Samples exceeding legal limit (MCL)

85

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
20151.77 ppm4948ND - 3.38 ppm
20161.66 ppm4443ND - 3.30 ppm
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A

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
2015-01-08391834NIT2.62 ppm
2015-01-08391836NIT1.23 ppm
2015-01-08391835NIT1.68 ppm
2015-01-08391838NIT2.76 ppm
2015-01-08391837NIT1.44 ppm
2015-01-18391833NIT2.42 ppm
2015-01-22392708NIT3.16 ppm
2015-01-22392705NIT1.89 ppm
2015-01-22392707NIT2.00 ppm
2015-01-22392706NIT2.03 ppm
2015-02-123938130.290 ppm
2015-03-24396191NIT1.77 ppm
2015-03-253961911.77 ppm
2015-03-26396321NIT1.39 ppm
2015-03-26396322NIT2.56 ppm
2015-04-09396960NIT1.65 ppm
2015-04-09396958NIT2.74 ppm
2015-04-09396959NIT1.69 ppm
2015-04-09396957NIT2.35 ppm
2015-06-164011581.10 ppm
2015-06-16401158NIT1.10 ppm
2015-06-234015453.21 ppm
2015-06-23401545NIT3.21 ppm
2015-07-01402098NIT1.43 ppm
2015-07-02402090NITND
2015-07-09402474NIT0.0400 ppm
2015-07-15402938NIT1.29 ppm
2015-07-15402937NIT1.89 ppm
2015-08-244055042.96 ppm
2015-08-24405504NIT2.96 ppm
2015-08-25405604NIT1.33 ppm
2015-08-254056041.33 ppm
2015-08-27405687NIT2.21 ppm
2015-09-094063180.640 ppm
2015-09-09406318NIT0.640 ppm
2015-09-10406391NIT1.86 ppm
2015-09-10406395NIT2.69 ppm
2015-10-07407978NIT3.38 ppm
2015-10-08408071NIT0.00142 ppm
2015-10-08408069NIT2.08 ppm
2015-10-08408070NIT2.75 ppm
2015-10-17407984NIT3.00 ppm
2015-10-18408068NIT0.950 ppm
2015-12-02411294NIT0.900 ppm
2015-12-17412462NIT1.50 ppm
2015-12-17412460NIT1.36 ppm
2015-12-17412461NIT2.97 ppm
2015-12-22412605NIT0.00173 ppm
2015-12-22412606NIT0.720 ppm
2016-03-23418083NIT1.36 ppm
2016-03-23418085NIT0.990 ppm
2016-03-29418236NIT2.67 ppm
2016-05-06420662NIT3.28 ppm
2016-05-06420661NIT1.67 ppm
2016-05-23421722NIT1.68 ppm
2016-06-22417935NIT1.28 ppm
2016-06-27423843NIT1.56 ppm
2016-06-28423913NIT0.290 ppm
2016-06-29424002NIT0.290 ppm
2016-06-29424007NIT1.79 ppm
2016-06-294240050.720 ppm
2016-07-06424312NIT0.01000 ppm
2016-07-06424312NIT0.01000 ppm
2016-07-06424341NIT0.01000 ppm
2016-07-13424844NIT2.62 ppm
2016-07-13424838NIT2.86 ppm
2016-07-13424842NIT2.17 ppm
2016-07-14424908NIT0.750 ppm
2016-07-14424912NIT2.04 ppm
2016-07-21425483NIT3.30 ppm
2016-07-21425483NIT3.30 ppm
2016-07-25425641NIT2.93 ppm
2016-07-25425643NIT2.00 ppm
2016-07-27425841NIT1.63 ppm
2016-07-27425844NIT1.05 ppm
2016-07-27425845NIT1.15 ppm
2016-07-28425957NIT1.06 ppm
2016-07-28425955NIT2.16 ppm
2016-07-28425956NIT2.15 ppm
2016-07-29426033NIT2.38 ppm
2016-08-25427984NIT2.62 ppm
2016-08-25427983NIT1.81 ppm
2016-09-29430339NIT1.85 ppm
2016-10-04430633NIT2.22 ppm
2016-10-04430632NIT2.22 ppm
2016-10-06430846NIT1.51 ppm
2016-10-06430847NIT1.30 ppm
2016-10-06430845NIT1.98 ppm
2016-10-14431399NIT1.43 ppm
2016-10-17431509NIT1.29 ppm
2016-10-17431508NIT2.10 ppm
2016-10-18431614NITND
2016-10-18431613NIT1.34 ppm