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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Hawthorne Water Department

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

 

65

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND130ND
2015ND110ND
2016ND100ND
2017ND80ND
2018ND110ND
2019ND120ND

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
2014-01-085810-007-0945ND
2014-02-045810-007-1230ND
2014-03-115810-007-0900ND
2014-04-025810-007-1205ND
2014-05-075810-007-1000ND
2014-06-045810-007-0955ND
2014-07-025810-007-1005ND
2014-07-025810-004-0950ND
2014-08-065810-007-1005ND
2014-09-105810-007-1010ND
2014-10-085810-007-1110ND
2014-11-125810-007-1050ND
2014-12-295810-007-0930ND
2015-01-225810-007-1000ND
2015-02-195810-007-1322ND
2015-03-185810-007-0900ND
2015-04-215810-007-1045ND
2015-05-205810-007-1025ND
2015-06-035810-007-0930ND
2015-08-175810-007-1110ND
2015-09-305810-007-1000ND
2015-10-265810-007-1045ND
2015-11-185810-007-1010ND
2015-12-165810-007-0950ND
2016-01-135810-007-0910ND
2016-03-305810-007-0915ND
2016-04-135810-007-0910ND
2016-05-185810-007-1010ND
2016-06-145810-007-1300ND
2016-07-205810-007-1225ND
2016-08-245810-007-1100ND
2016-09-295810-007-1000ND
2016-10-195810-007-0925ND
2016-11-215810-007-1100ND
2017-01-189590-007-1055ND
2017-05-269590-007-1155ND
2017-07-185810-004-1330ND
2017-08-169590-007-0925ND
2017-09-139590-007-1135ND
2017-10-049590-007-1045ND
2017-11-159590-007-0945ND
2017-12-139590-007-0935ND
2018-01-249590-007-0905ND
2018-02-149590-007-0850ND
2018-03-149590-007-0940ND
2018-04-119590-007-0830ND
2018-05-109590-007-1315ND
2018-06-139590-007-0915ND
2018-08-159590-007-1025ND
2018-09-129590-007-1105ND
2018-10-109590-007-1115ND
2018-11-149590-007-1535ND
2018-12-129590-007-1105ND
2019-01-099590-007-1145ND
2019-02-279590-007-0945ND
2019-03-139590-007-1105ND
2019-04-109590-007-1130ND
2019-05-089590-007-1030ND
2019-06-059590-007-1115ND
2019-07-019590-007-1145ND
2019-08-079590-007-1210ND
2019-09-049590-007-0920ND
2019-10-099590-007-1145ND
2019-11-069590-007-1140ND
2019-12-049590-007-0925ND