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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

Waukesha Water Utility

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20140.0366 ppm75ND - 0.1000 ppm
20150.0283 ppm32ND - 0.0530 ppm
2016ND10ND
20170.0143 ppm71ND - 0.1000 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
2014-03-26776754ND
2014-03-26776756ND
2014-05-077844200.0380 ppm
2014-05-077844230.0390 ppm
2014-05-077844260.1000 ppm
2014-06-117961040.0360 ppm
2014-06-117961010.0430 ppm
2015-03-108478520.0320 ppm
2015-03-11847854ND
2015-09-298863810.0530 ppm
2016-07-14933375ND
2017-03-28980079ND
2017-03-28980085ND
2017-03-289800820.1000 ppm
2017-05-02986362ND
2017-05-02986365ND
2017-05-31994538ND
2017-05-31994541ND