EWG's Tap Water Database — 2021 UPDATE


Nitrate and nitrite

Hawks Meadow Water System

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.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20140.495 ppm220.260 ppm - 0.730 ppm
20150.670 ppm110.670 ppm
20160.640 ppm110.640 ppm
20170.200 ppm110.200 ppm
20180.220 ppm110.220 ppm
20190.170 ppm110.170 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
2014-06-24148380.730 ppm
2014-09-21245950.260 ppm
2015-07-26216440.670 ppm
2016-06-060.640 ppm
2017-06-270.200 ppm
2018-06-030.220 ppm
2019-08-270.170 ppm