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EWG's Tap Water Database — 2019 UPDATE

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Nitrate

California American Water Company - Coronado

NOTE: California American Water Company - Coronado purchases water from City of San Diego which is required to test for nitrate. Sample information shown below was taken by City of San Diego.

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.

 

208

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND320ND
2013ND350ND
2014ND360ND
2015ND360ND
2016ND330ND
20170.0474 ppm363ND - 0.764 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

NOTE: California American Water Company - Coronado purchases water from City of San Diego which is required to test for nitrate. Sample information shown below was taken by City of San Diego.

Date Lab ID Result
2012-01-039437-001-0000ND
2012-01-039437-006-0000ND
2012-01-039437-010-0000ND
2012-02-069437-001-0000ND
2012-02-069437-006-0000ND
2012-02-069437-010-0000ND
2012-03-059437-001-0815ND
2012-03-059437-006-1230ND
2012-03-059437-010-1000ND
2012-04-029437-001-0000ND
2012-04-029437-006-0000ND
2012-04-029437-010-0000ND
2012-05-159437-001-0000ND
2012-05-159437-006-0000ND
2012-05-159437-010-0000ND
2012-06-049437-001-0000ND
2012-06-049437-006-0000ND
2012-06-049437-010-0000ND
2012-07-029437-001-0000ND
2012-07-029437-006-0000ND
2012-07-029437-010-0000ND
2012-08-069437-001-0000ND
2012-08-079437-010-0000ND
2012-08-089437-006-0000ND
2012-09-049437-001-0000ND
2012-09-049437-006-0000ND
2012-09-049437-010-0000ND
2012-10-019437-001-0000ND
2012-10-019437-006-0000ND
2012-10-019437-010-0000ND
2012-12-039437-001-0000ND
2012-12-039437-006-0000ND
2013-01-079437-001-0000ND
2013-01-079437-006-0000ND
2013-01-079437-010-0000ND
2013-02-049437-001-0000ND
2013-02-049437-010-0000ND
2013-03-049437-001-0000ND
2013-03-049437-006-0000ND
2013-03-049437-010-0000ND
2013-04-029437-001-0000ND
2013-04-029437-006-0000ND
2013-04-029437-010-0000ND
2013-05-069437-001-0000ND
2013-05-069437-010-0000ND
2013-05-299437-006-0000ND
2013-06-039437-006-0000ND
2013-06-059437-001-0000ND
2013-06-059437-010-0000ND
2013-07-019437-001-0000ND
2013-07-019437-006-0000ND
2013-07-019437-010-0000ND
2013-08-059437-001-0000ND
2013-08-059437-006-0000ND
2013-08-059437-010-0000ND
2013-09-039437-001-0000ND
2013-09-039437-006-0000ND
2013-09-039437-010-0000ND
2013-10-089437-001-0000ND
2013-10-089437-006-0000ND
2013-10-089437-010-0000ND
2013-11-049437-001-0000ND
2013-11-049437-006-0000ND
2013-11-049437-010-0000ND
2013-12-029437-001-0000ND
2013-12-029437-006-0000ND
2013-12-029437-010-0000ND
2014-01-069437-001-0000ND
2014-01-069437-006-0000ND
2014-01-069437-010-0000ND
2014-02-039437-001-0000ND
2014-02-039437-006-0000ND
2014-02-039437-010-0000ND
2014-03-039437-001-0000ND
2014-03-039437-006-0000ND
2014-03-049437-010-0000ND
2014-04-079437-001-0000ND
2014-04-079437-006-0000ND
2014-04-079437-010-0000ND
2014-05-209437-001-0000ND
2014-05-209437-006-0000ND
2014-05-209437-010-0000ND
2014-06-029437-001-0000ND
2014-06-029437-006-0000ND
2014-06-029437-010-0000ND
2014-07-079437-001-0000ND
2014-07-079437-006-0000ND
2014-07-079437-010-0000ND
2014-08-049437-001-0000ND
2014-08-049437-006-0000ND
2014-08-049437-010-0000ND
2014-09-029437-001-0000ND
2014-09-029437-006-0000ND
2014-09-029437-010-0000ND
2014-10-069437-001-0000ND
2014-10-069437-006-0000ND
2014-10-069437-010-0000ND
2014-11-039437-001-0000ND
2014-11-039437-006-0000ND
2014-11-039437-010-0000ND
2014-12-019437-001-0000ND
2014-12-019437-010-0000ND
2014-12-089437-006-0000ND
2015-01-059437-001-0000ND
2015-01-059437-006-0000ND
2015-01-059437-010-0000ND
2015-02-029437-001-0000ND
2015-02-029437-006-0000ND
2015-02-029437-010-0000ND
2015-03-029437-001-0000ND
2015-03-029437-010-0000ND
2015-03-179437-006-0000ND
2015-04-069437-001-0000ND
2015-04-069437-006-0000ND
2015-04-069437-010-0000ND
2015-05-049437-001-0000ND
2015-05-049437-006-0000ND
2015-05-049437-010-0000ND
2015-06-019437-001-0000ND
2015-06-019437-006-0000ND
2015-06-019437-010-0000ND
2015-07-069437-001-0000ND
2015-07-069437-006-0000ND
2015-07-069437-010-0000ND
2015-08-039437-001-0000ND
2015-08-039437-006-0000ND
2015-08-039437-010-0000ND
2015-09-099437-001-0000ND
2015-09-099437-006-0000ND
2015-09-099437-010-0000ND
2015-10-059437-001-0000ND
2015-10-059437-010-0000ND
2015-10-069437-006-0000ND
2015-11-099437-001-0000ND
2015-11-099437-006-0000ND
2015-11-099437-010-0000ND
2015-12-079437-001-0000ND
2015-12-079437-006-0000ND
2015-12-079437-010-0000ND
2016-01-049437-001-0000ND
2016-01-049437-006-0000ND
2016-01-049437-010-0000ND
2016-02-019437-001-0000ND
2016-02-019437-006-0000ND
2016-02-019437-010-0000ND
2016-03-079437-001-0000ND
2016-03-079437-006-0000ND
2016-03-079437-010-0000ND
2016-04-049437-001-0000ND
2016-04-049437-006-0000ND
2016-04-049437-010-0000ND
2016-05-029437-001-0000ND
2016-05-029437-010-0000ND
2016-05-039437-006-0000ND
2016-07-069437-001-0000ND
2016-07-069437-006-0000ND
2016-07-069437-010-0000ND
2016-08-019437-001-0000ND
2016-08-019437-006-0000ND
2016-08-019437-010-0000ND
2016-09-129437-001-0000ND
2016-09-129437-006-0000ND
2016-09-129437-010-0000ND
2016-10-039437-001-0000ND
2016-10-039437-006-0000ND
2016-10-039437-010-0000ND
2016-11-079437-001-0000ND
2016-11-079437-006-0000ND
2016-11-079437-010-0000ND
2016-12-059437-001-0000ND
2016-12-059437-006-0000ND
2016-12-059437-010-0000ND
2017-01-039437-001-0000ND
2017-01-039437-006-0000ND
2017-01-109437-010-0000ND
2017-02-069437-001-0000ND
2017-02-069437-006-0000ND
2017-02-229437-010-0000ND
2017-03-069437-001-0000ND
2017-03-069437-006-0000ND
2017-03-069437-010-00000.764 ppm
2017-04-039437-001-0000ND
2017-04-039437-006-0000ND
2017-04-039437-010-00000.422 ppm
2017-05-019437-001-0000ND
2017-05-019437-006-0000ND
2017-05-019437-010-00000.520 ppm
2017-06-059437-001-0000ND
2017-06-059437-006-0000ND
2017-06-059437-010-0000ND
2017-07-109437-001-0000ND
2017-07-109437-006-0000ND
2017-07-109437-010-0000ND
2017-08-079437-001-0000ND
2017-08-079437-006-0000ND
2017-08-079437-010-0000ND
2017-09-119437-001-0000ND
2017-09-119437-006-0000ND
2017-09-119437-010-0000ND
2017-10-029437-001-0000ND
2017-10-029437-006-0000ND
2017-10-029437-010-0000ND
2017-11-069437-001-0000ND
2017-11-069437-006-0000ND
2017-11-069437-010-0000ND
2017-12-049437-001-0000ND
2017-12-049437-006-0000ND
2017-12-049437-010-0000ND