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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Selbyville Water Department

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.

MORE ABOUT THIS CONTAMINANT

 

63

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND110ND
2015ND120ND
2016ND80ND
2017ND70ND
2018ND120ND
2019ND130ND

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
2014-02-20S38156ND
2014-03-20S38162ND
2014-04-29S38168ND
2014-06-25S547078ND
2014-07-29S547084ND
2014-08-26S547090ND
2014-09-24S547101ND
2014-10-28S547102ND
2014-11-12S589893ND
2014-11-24S547108ND
2014-12-18S547114ND
2015-01-13S548223ND
2015-02-24S548224ND
2015-03-25S6548232ND
2015-04-28S553218ND
2015-05-27S553224ND
2015-06-24S553231ND
2015-07-28S548237ND
2015-08-27S548243ND
2015-09-29S548244ND
2015-10-27S548249ND
2015-11-30S548250ND
2015-12-28S548253ND
2016-01-12S676192ND
2016-01-27S548256ND
2016-03-07S548262ND
2016-03-29S548263ND
2016-04-27S548268ND
2016-05-25S548269ND
2016-06-22S548272ND
2016-07-28S548275ND
2017-01-16S782200ND
2017-02-06S693947ND
2017-06-27S548307ND
2017-07-18S548310ND
2017-08-15S548315ND
2017-09-20S548318ND
2017-11-29S553212ND
2018-01-31S553208ND
2018-03-27S548323ND
2018-04-26S548328ND
2018-05-30S548331ND
2018-06-28S548336ND
2018-07-31S548342ND
2018-08-29S548345ND
2018-09-26S548346ND
2018-10-31S548353ND
2018-11-29S548356ND
2018-12-13S792261ND
2018-12-27S548357ND
2019-01-29S548360ND
2019-02-26S548363ND
2019-03-27S548349ND
2019-04-30S548352ND
2019-05-09S698773ND
2019-06-26S698778ND
2019-07-31S698785ND
2019-08-22S698788ND
2019-09-26S698791ND
2019-10-29S698794ND
2019-11-26S698797ND
2019-11-27S925292ND
2019-12-12S698800ND