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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

East Cherry Creek Valley Water and Sanitation District

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.189 ppm148ND - 0.750 ppm
20130.700 ppm220.600 ppm - 0.800 ppm
20140.650 ppm440.400 ppm - 1.000 ppm
20150.700 ppm110.700 ppm
20160.800 ppm110.800 ppm
2017N/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 Result
2012-04-120.200 ppm
2012-04-12ND
2012-04-13ND
2012-04-190.1000 ppm
2012-04-23ND
2012-04-260.1000 ppm
2012-04-26ND
2012-05-040.200 ppm
2012-05-10ND
2012-05-17ND
2012-05-170.1000 ppm
2012-05-250.700 ppm
2012-07-130.500 ppm
2012-10-250.750 ppm
2013-06-050.600 ppm
2013-11-140.800 ppm
2014-02-210.400 ppm
2014-05-190.800 ppm
2014-08-181.000 ppm
2014-11-190.400 ppm
2015-02-030.700 ppm
2016-03-080.800 ppm