Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Nitrite

Rehoboth District

Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Nitrite is significantly more toxic than nitrate. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer.

MORE ABOUT THIS CONTAMINANT

 

41

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND60ND
2015ND70ND
2016ND70ND
2017ND60ND
2018ND70ND
2019ND80ND

ppm = parts per million

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 1 ppm

The legal limit for nitrite, established in 1991, was based on the rate of conversion of ingested nitrate into nitrite in adults. This limit may not fully protect against the risk of cancer due to nitrite exposure.

ppm = parts per million

All test results

Date Lab ID Result
2014-04-23S479071ND
2014-04-30S479085ND
2014-04-30S479084ND
2014-06-30S479240ND
2014-08-19S579224ND
2014-10-21S251487ND
2015-01-15S504600ND
2015-01-28S588759ND
2015-01-28S588760ND
2015-01-28S588761ND
2015-05-27S602001ND
2015-05-27S602000ND
2015-08-10S590350ND
2016-01-21S659117ND
2016-01-21S659116ND
2016-01-21S659115ND
2016-04-11S73228ND
2016-06-14S659093ND
2016-06-14S659092ND
2016-06-14S659091ND
2017-02-21S614677ND
2017-04-27S614606ND
2017-04-27S614605ND
2017-04-27S614604ND
2017-05-30S614609ND
2017-06-13S614696ND
2018-04-30S811889ND
2018-04-30S811890ND
2018-04-30S811891ND
2018-04-30S811892ND
2018-04-30S811893ND
2018-06-07S770694ND
2018-06-07S769420ND
2019-06-03S848022ND
2019-06-03S848021ND
2019-06-03S848020ND
2019-06-03S848019ND
2019-06-03S848017ND
2019-06-10S848029ND
2019-06-10S848028ND
2019-06-13S848040ND