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EWG's Tap Water Database

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Nitrate

Marion Municipal Water Department

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20100.1000 ppm42ND - 0.300 ppm
20110.167 ppm32ND - 0.400 ppm
20120.0750 ppm42ND - 0.200 ppm
20130.533 ppm32ND - 1.30 ppm
20140.140 ppm53ND - 0.400 ppm
20150.125 ppm42ND - 0.300 ppm

ppm = parts per million.

State and national drinking water standards and health guidelines

Health Guideline 0.14 ppm

The health guideline of 0.14 ppm for nitrate was defined in a peer-reviewed scientific study by EWG and corresponds to one-in-one-million annual cancer risk level.

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 Lab ID Result
2010-02-1717384760.1000 ppm
2010-05-261756635ND
2010-10-151822070ND
2010-10-1917909100.300 ppm
2011-02-2318139430.1000 ppm
2011-05-231829295ND
2011-11-1518715950.400 ppm
2012-02-0718846380.1000 ppm
2012-06-051909747ND
2012-12-1719518880.200 ppm
2012-12-171951889ND
2013-02-071958145ND
2013-06-1819858591.30 ppm
2013-12-0420237930.300 ppm
2014-02-1920360240.200 ppm
2014-05-272052528ND
2014-06-0220537980.1000 ppm
2014-06-052056743ND
2014-10-1420863720.400 ppm
2015-01-281A51509-01ND
2015-06-011F50064-01ND
2015-09-091I50658-010.200 ppm
2015-10-281J52165-020.300 ppm