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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

Southern California Edison Company-Santa Catalina

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.

MORE ABOUT THIS CONTAMINANT

 

82

Samples

0

Samples exceeding legal limit (MCL)

27

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.203 ppm163ND - 1.33 ppm
20150.260 ppm143ND - 1.67 ppm
20160.818 ppm103ND - 5.80 ppm
20170.751 ppm168ND - 3.60 ppm
20180.280 ppm51ND - 1.40 ppm
20190.475 ppm219ND - 1.70 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.

EPA Maximum Contaminant
Level (MCL) 10 ppm

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2014-02-259588-041-0900ND
2014-05-149588-041-0825ND
2014-06-199588-041-1115ND
2014-07-109588-012-10301.22 ppm
2014-07-179588-019-1250ND
2014-07-179588-020-14250.700 ppm
2014-07-189588-023-1100ND
2014-07-189588-012-12501.33 ppm
2014-07-189588-016-1130ND
2014-07-189588-030-1215ND
2014-07-189588-006-1100ND
2014-07-219588-014-1130ND
2014-08-149588-041-1200ND
2014-10-229588-012-1100ND
2014-11-049588-005-1111ND
2014-11-079588-041-0840ND
2015-02-239588-041-1120ND
2015-05-059588-041-0830ND
2015-06-039588-019-0940ND
2015-06-039588-016-1030ND
2015-06-039588-030-1045ND
2015-06-039588-020-12250.520 ppm
2015-06-049588-014-1205ND
2015-06-049588-006-1250ND
2015-06-049588-005-1130ND
2015-06-059588-012-12301.45 ppm
2015-06-129588-041-1330ND
2015-07-229588-041-1015ND
2015-07-229588-005-14321.67 ppm
2015-10-219588-041-0930ND
2016-01-089588-041-1100ND
2016-04-189588-041-11451.60 ppm
2016-06-229588-005-1300ND
2016-06-229588-020-10400.780 ppm
2016-06-229588-016-1120ND
2016-06-229588-014-1220ND
2016-06-229588-019-1000ND
2016-06-229588-006-1235ND
2016-06-229588-030-1100ND
2016-12-149588-020-12055.80 ppm
2017-02-249588-031-11473.60 ppm
2017-05-189588-031-1100ND
2017-05-189588-023-1100ND
2017-06-229588-014-1130ND
2017-06-239588-019-1000ND
2017-06-239588-030-11051.30 ppm
2017-06-239588-020-13300.420 ppm
2017-06-239588-016-10401.60 ppm
2017-06-239588-023-1030ND
2017-06-269588-031-12001.50 ppm
2017-10-179588-041-0930ND
2017-12-199588-030-10301.30 ppm
2017-12-209588-006-1127ND
2017-12-209588-031-09501.20 ppm
2017-12-219588-016-09091.10 ppm
2017-12-219588-005-1025ND
2018-06-229588-005-1240ND
2018-06-229588-006-1215ND
2018-07-309588-012-12151.40 ppm
2018-10-029588-041-0850ND
2018-12-179588-014-1230ND
2019-02-229588-049-1100ND
2019-03-269588-031-10101.20 ppm
2019-03-269588-016-10001.000 ppm
2019-03-269588-020-1020ND
2019-03-269588-023-11151.70 ppm
2019-03-269588-030-10201.40 ppm
2019-04-259588-049-1315ND
2019-09-199588-019-13100.420 ppm
2019-09-199588-023-1010ND
2019-09-199588-020-1200ND
2019-09-259588-049-1130ND
2019-09-269588-014-1100ND
2019-09-269588-016-12151.20 ppm
2019-09-269588-031-12300.960 ppm
2019-09-269588-030-12251.000 ppm
2019-10-249588-006-1020ND
2019-11-269588-023-1200ND
2019-12-109588-020-1420ND
2019-12-109588-019-1545ND
2019-12-119588-012-11001.10 ppm
2019-12-119588-005-1100ND