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EWG's Tap Water Database

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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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011N/A00N/A
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

ppm = parts per million.

State and national drinking water standards and health guidelines

Health Guideline 5 ppm

The health guideline of 5 ppm for nitrate and nitrite was defined by EWG based on studies by scientists at the National Cancer Institute and other independent researchers. This health guideline protects against cancer and harm to fetal growth and development.

ppm = parts per million.

EPA Maximum Contaminant
Level (MCL) 10 ppm

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppm = parts per million.

EPA Maximum Contaminant
Level Goal (MCLG)10 ppm

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppm = parts per million.

All test results

Date Result
2012-04-12ND
2012-04-120.200 ppm
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
2012-05-170.1000 ppm
2012-05-17ND
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