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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

Lake Hemet-garner Valley

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

 

68

Samples

0

Samples exceeding legal limit (MCL)

38

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.41 ppm94ND - 6.55 ppm
20151.92 ppm147ND - 8.36 ppm
20163.07 ppm139ND - 7.60 ppm
20173.72 ppm106ND - 7.70 ppm
20182.47 ppm105ND - 6.60 ppm
20192.34 ppm127ND - 6.60 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
2014-03-114790-004-09551.65 ppm
2014-03-114790-001-1015ND
2014-03-144790-002-10352.48 ppm
2014-03-184790-010-1015ND
2014-03-254790-004-0945ND
2014-03-254790-003-09306.55 ppm
2014-03-254790-001-1000ND
2014-04-224790-010-09451.99 ppm
2014-06-034790-009-0940ND
2015-01-054790-003-09408.36 ppm
2015-02-174790-009-1005ND
2015-03-174790-001-09500.294 ppm
2015-03-174790-004-0900ND
2015-03-174790-010-0940ND
2015-03-174790-002-08452.10 ppm
2015-04-234790-010-0930ND
2015-04-234790-002-08552.10 ppm
2015-04-234790-009-0920ND
2015-07-314790-003-09305.20 ppm
2015-09-014790-003-09452.26 ppm
2015-11-034790-009-1100ND
2015-11-034790-009-1100ND
2015-11-174790-003-08006.60 ppm
2016-01-193761-003-09307.10 ppm
2016-03-153761-003-11557.00 ppm
2016-03-213761-001-1430ND
2016-03-293761-002-09302.70 ppm
2016-04-123761-010-1140ND
2016-04-123761-004-11250.460 ppm
2016-04-193761-003-10155.60 ppm
2016-05-103761-010-1035ND
2016-05-103761-004-10150.650 ppm
2016-05-163761-003-08255.80 ppm
2016-08-023761-009-1455ND
2016-08-093761-003-12003.00 ppm
2016-11-223761-003-08407.60 ppm
2017-02-143761-003-08556.30 ppm
2017-03-223761-001-0825ND
2017-04-113761-004-0850ND
2017-04-113761-002-09202.00 ppm
2017-04-113761-010-0830ND
2017-07-113761-003-09307.70 ppm
2017-08-283761-009-1115ND
2017-10-173761-003-09007.40 ppm
2017-11-143761-003-09307.00 ppm
2017-12-263761-003-09106.80 ppm
2018-01-093761-002-10053.80 ppm
2018-02-063761-009-1050ND
2018-02-133761-004-0950ND
2018-02-133761-003-09305.80 ppm
2018-03-133761-001-0900ND
2018-04-103761-010-0945ND
2018-04-103761-004-0930ND
2018-04-103761-003-09006.60 ppm
2018-07-103761-003-09202.80 ppm
2018-10-093761-003-09255.70 ppm
2019-01-083761-003-09106.60 ppm
2019-01-083761-002-08253.40 ppm
2019-02-123761-009-0945ND
2019-03-203761-002-08153.80 ppm
2019-04-093761-004-1130ND
2019-04-093761-010-1210ND
2019-04-093761-003-10056.50 ppm
2019-05-143761-009-1050ND
2019-07-093761-003-10152.80 ppm
2019-10-103761-003-08302.30 ppm
2019-10-143761-003-09302.70 ppm
2019-12-063761-001-0855ND