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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

City of Ridgeland

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.

 

44

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND80ND
2013ND70ND
2014ND70ND
2015ND70ND
2016ND70ND
2017ND80ND

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
2012-02-27120228-109NIND
2012-02-27120228-108NIND
2012-02-27120228-093NIND
2012-02-27120228-092NIND
2012-02-27120228-091NIND
2012-02-27120228-115NIND
2012-10-29121030-002NIND
2012-10-29121030-001NIND
2013-02-25130226-015NIND
2013-02-25130226-014NIND
2013-02-25130226-018NIND
2013-02-25130226-016NIND
2013-02-25130226-017NIND
2013-02-25130226-021NIND
2013-02-25130226-022NIND
2014-04-15140416-001NIND
2014-04-15140416-002NIND
2014-04-15140416-003NIND
2014-04-15140416-005NIND
2014-04-15140416-004NIND
2014-04-15140416-006NIND
2014-11-17141118-003NIND
2015-04-06150407-009NIND
2015-04-06150407-001NIND
2015-04-06150407-003NIND
2015-04-06150407-002NIND
2015-04-06150407-004NIND
2015-04-06150407-005NIND
2015-04-06150407-006NIND
2016-04-26160427-009NIND
2016-04-26160427-011NIND
2016-04-26160427-012NIND
2016-04-26160427-013NIND
2016-04-26160427-024NIND
2016-04-26160427-026NIND
2016-04-26160427-027NIND
2017-03-06170309-062NIND
2017-03-06170309-063NIND
2017-03-06170309-064NIND
2017-03-08170309-079NIND
2017-03-08170309-066NIND
2017-03-08170309-065NIND
2017-03-08170309-061NIND
2017-10-31171101-005NIND