Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Nitrate

Los Angeles County WW District 4 & 34-Lancaster

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.

 

186

Samples

0

Samples exceeding legal limit (MCL)

142

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.24 ppm3021ND - 5.51 ppm
20131.37 ppm3324ND - 5.51 ppm
20141.24 ppm3124ND - 4.04 ppm
20151.30 ppm3425ND - 5.40 ppm
20161.35 ppm2722ND - 5.23 ppm
20171.37 ppm3126ND - 4.40 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
2012-01-245442-053-0903ND
2012-01-245442-054-0937ND
2012-03-055442-026-08330.791 ppm
2012-03-055442-028-08580.895 ppm
2012-03-055442-062-09361.86 ppm
2012-03-065442-048-09500.529 ppm
2012-03-065442-063-09570.653 ppm
2012-03-075442-023-09505.51 ppm
2012-03-075442-070-10550.531 ppm
2012-03-075442-071-10450.495 ppm
2012-04-105442-093-0751ND
2012-04-125442-036-0930ND
2012-04-125442-054-1015ND
2012-04-305442-055-1130ND
2012-05-235442-094-10331.27 ppm
2012-05-235442-095-10561.76 ppm
2012-05-245442-002-1118ND
2012-05-245442-011-1036ND
2012-05-245442-035-08491.81 ppm
2012-05-245442-037-09560.933 ppm
2012-05-245442-040-08140.590 ppm
2012-06-065442-041-09000.797 ppm
2012-06-075442-023-08153.98 ppm
2012-06-075442-067-11100.558 ppm
2012-06-135442-069-10301.53 ppm
2012-07-105442-023-09303.95 ppm
2012-07-105442-045-10251.10 ppm
2012-07-265442-016-09303.48 ppm
2012-08-085442-055-1157ND
2012-09-105442-023-09184.07 ppm
2013-01-285442-023-11025.51 ppm
2013-03-115442-011-0931ND
2013-03-115442-016-11403.61 ppm
2013-03-115442-023-10453.98 ppm
2013-03-115442-028-12050.612 ppm
2013-03-115442-062-11301.66 ppm
2013-03-125442-036-1106ND
2013-03-135442-035-0852ND
2013-03-135442-035-11591.12 ppm
2013-03-195442-002-1135ND
2013-03-195442-002-1135ND
2013-03-195442-026-09250.696 ppm
2013-03-195442-026-09250.698 ppm
2013-03-195442-053-0949ND
2013-03-195442-054-0943ND
2013-04-035442-023-09104.04 ppm
2013-04-035442-063-08350.675 ppm
2013-04-095442-070-09450.515 ppm
2013-04-115442-055-1022ND
2013-05-215442-040-09080.657 ppm
2013-06-045442-023-10453.93 ppm
2013-06-045442-041-09100.865 ppm
2013-06-045442-048-09340.633 ppm
2013-06-125442-094-08331.27 ppm
2013-06-125442-095-08591.27 ppm
2013-07-165442-045-10501.15 ppm
2013-07-175442-067-10500.592 ppm
2013-07-235442-071-10470.696 ppm
2013-07-245442-069-10021.36 ppm
2013-07-295442-037-09511.65 ppm
2013-09-185442-023-09253.93 ppm
2013-11-125442-093-1033ND
2013-12-115442-023-10303.95 ppm
2014-02-195442-002-0939ND
2014-02-195442-036-0820ND
2014-02-255442-016-10503.30 ppm
2014-02-255442-023-10353.95 ppm
2014-02-255442-035-09241.14 ppm
2014-03-045442-023-11304.04 ppm
2014-03-055442-062-11231.66 ppm
2014-03-055442-071-11580.533 ppm
2014-03-115442-026-08450.827 ppm
2014-03-115442-053-1059ND
2014-03-115442-054-1111ND
2014-03-125442-028-09190.576 ppm
2014-03-185442-011-0830ND
2014-03-265442-055-1034ND
2014-04-085442-063-09200.587 ppm
2014-04-215442-070-10360.547 ppm
2014-05-075442-070-11000.551 ppm
2014-05-135442-037-11380.587 ppm
2014-05-135442-040-09000.671 ppm
2014-05-135442-093-10400.452 ppm
2014-06-035442-041-09440.924 ppm
2014-06-115442-048-09280.614 ppm
2014-06-175442-069-09001.36 ppm
2014-06-245442-094-09001.36 ppm
2014-06-245442-095-11001.27 ppm
2014-06-255442-023-08323.86 ppm
2014-06-265442-093-0850ND
2014-07-095442-045-10241.32 ppm
2014-07-175442-067-10260.585 ppm
2014-09-095442-023-08413.86 ppm
2014-12-035442-023-08353.93 ppm
2015-01-285442-053-0915ND
2015-02-045442-016-11333.50 ppm
2015-02-045442-023-10304.07 ppm
2015-02-055442-035-10351.61 ppm
2015-02-095442-002-1045ND
2015-02-255442-036-0910ND
2015-03-045442-011-1020ND
2015-03-045442-053-0910ND
2015-03-045442-054-0915ND
2015-03-095442-023-08554.13 ppm
2015-03-105442-026-08270.861 ppm
2015-03-105442-071-09400.479 ppm
2015-03-115442-028-08500.630 ppm
2015-03-115442-062-08301.82 ppm
2015-03-125442-055-1000ND
2015-04-015442-070-10200.501 ppm
2015-04-085442-036-0852ND
2015-04-085442-063-10550.558 ppm
2015-04-145442-068-11100.642 ppm
2015-05-055442-040-09430.551 ppm
2015-05-065442-037-10300.542 ppm
2015-05-075442-093-08500.452 ppm
2015-06-025442-041-09161.03 ppm
2015-06-025442-048-08160.565 ppm
2015-06-025442-069-11001.44 ppm
2015-06-025442-094-11401.04 ppm
2015-06-255442-023-08414.00 ppm
2015-07-075442-045-09381.26 ppm
2015-07-085442-067-09220.572 ppm
2015-08-125442-036-0910ND
2015-12-165442-023-10555.39 ppm
2015-12-165442-023-10555.40 ppm
2015-12-165442-095-11251.54 ppm
2015-12-165442-095-11251.54 ppm
2016-01-195442-035-09500.681 ppm
2016-01-195442-040-09450.551 ppm
2016-01-255442-028-08400.798 ppm
2016-01-255442-048-09400.492 ppm
2016-01-255442-062-09301.15 ppm
2016-01-265442-093-11000.455 ppm
2016-02-095442-016-10283.61 ppm
2016-02-095442-068-10250.672 ppm
2016-02-095442-069-10101.49 ppm
2016-02-095442-070-11100.519 ppm
2016-02-105442-071-11250.481 ppm
2016-03-095442-023-10415.23 ppm
2016-03-285442-067-08560.574 ppm
2016-04-205442-026-10160.970 ppm
2016-04-205442-041-09341.11 ppm
2016-06-085442-036-0945ND
2016-06-095442-023-10533.95 ppm
2016-06-275442-094-11251.28 ppm
2016-06-275442-095-10501.37 ppm
2016-06-285442-053-1155ND
2016-06-285442-054-1152ND
2016-09-145442-037-11471.29 ppm
2016-09-275442-023-08564.06 ppm
2016-11-095442-095-10351.57 ppm
2016-11-165442-055-0912ND
2016-12-075442-023-09294.11 ppm
2016-12-155442-011-1027ND
2017-03-155442-023-07004.40 ppm
2017-06-219588-023-09303.70 ppm
2017-07-179588-036-0836ND
2017-07-179588-069-10301.70 ppm
2017-07-179588-094-11101.40 ppm
2017-07-189588-016-10003.40 ppm
2017-07-189588-023-09453.90 ppm
2017-07-189588-028-11050.660 ppm
2017-07-189588-035-09001.40 ppm
2017-07-189588-048-10000.570 ppm
2017-07-189588-062-10101.10 ppm
2017-07-189588-063-09500.550 ppm
2017-07-189588-067-10300.630 ppm
2017-07-249588-070-10100.610 ppm
2017-07-249588-071-10000.530 ppm
2017-08-159590-041-10401.30 ppm
2017-08-159590-045-10151.80 ppm
2017-08-169590-040-10300.750 ppm
2017-08-169590-093-08500.490 ppm
2017-08-169590-095-09151.50 ppm
2017-08-299590-094-09300.730 ppm
2017-09-269590-011-1130ND
2017-09-269590-023-10004.00 ppm
2017-09-269590-055-1050ND
2017-11-219590-045-09351.40 ppm
2017-11-279590-023-10200.550 ppm
2017-11-289590-023-11003.90 ppm
2017-11-299590-037-11001.000 ppm
2017-11-299590-053-1045ND
2017-11-299590-054-1030ND
2017-12-279590-068-09350.640 ppm