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EWG's Tap Water Database — 2019 UPDATE

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Nitrate

California Water Service Co-leona 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.

 

194

Samples

0

Samples exceeding legal limit (MCL)

193

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20124.44 ppm36360.277 ppm - 7.99 ppm
20134.38 ppm35350.0316 ppm - 8.06 ppm
20144.60 ppm36360.395 ppm - 8.00 ppm
20155.14 ppm31310.944 ppm - 8.12 ppm
20165.36 ppm29290.879 ppm - 8.29 ppm
20175.67 ppm27270.521 ppm - 8.84 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
2012-01-255701-001-11477.99 ppm
2012-01-255701-006-11493.90 ppm
2012-01-255701-008-11452.55 ppm
2012-02-085701-001-13447.70 ppm
2012-02-085701-005-13280.648 ppm
2012-02-085810-006-14033.16 ppm
2012-02-085701-008-13133.74 ppm
2012-03-135701-001-14157.91 ppm
2012-03-135701-006-14123.67 ppm
2012-03-135701-008-14002.21 ppm
2012-04-175701-001-13177.56 ppm
2012-04-175701-008-13023.14 ppm
2012-05-165701-001-13537.87 ppm
2012-05-165701-006-13523.96 ppm
2012-05-165701-008-13501.56 ppm
2012-06-125701-001-14447.77 ppm
2012-06-125701-006-14454.06 ppm
2012-06-125701-008-14431.22 ppm
2012-07-105701-001-13477.86 ppm
2012-07-105701-006-13494.09 ppm
2012-07-105701-008-13450.277 ppm
2012-08-075701-001-12437.92 ppm
2012-08-075701-006-12444.04 ppm
2012-08-075701-008-12410.300 ppm
2012-09-055701-001-13447.45 ppm
2012-09-055701-006-13424.78 ppm
2012-09-055701-008-13500.582 ppm
2012-10-095701-001-12597.95 ppm
2012-10-095701-006-12574.08 ppm
2012-10-095701-008-12451.05 ppm
2012-11-195701-001-12227.80 ppm
2012-11-195701-006-12124.00 ppm
2012-11-195701-008-11402.65 ppm
2012-12-115701-001-12297.59 ppm
2012-12-115701-006-12314.05 ppm
2012-12-115701-008-12222.83 ppm
2013-01-085701-001-12437.81 ppm
2013-01-085701-006-12414.12 ppm
2013-01-085701-008-12382.04 ppm
2013-02-055701-001-13197.69 ppm
2013-02-055701-005-13180.989 ppm
2013-02-055701-006-13214.00 ppm
2013-02-055701-008-13153.24 ppm
2013-03-055701-001-12527.81 ppm
2013-03-055701-006-12544.07 ppm
2013-03-055701-008-12503.18 ppm
2013-04-025701-001-13377.38 ppm
2013-04-025701-008-13181.82 ppm
2013-05-075701-001-14067.54 ppm
2013-05-075701-008-14021.52 ppm
2013-06-045701-001-13387.73 ppm
2013-06-045701-008-13341.12 ppm
2013-07-165701-001-14547.95 ppm
2013-07-165701-006-14524.03 ppm
2013-07-165701-008-15031.04 ppm
2013-08-065701-001-10258.06 ppm
2013-08-065701-006-10274.18 ppm
2013-08-065701-008-10230.544 ppm
2013-09-105701-001-12397.86 ppm
2013-09-105701-006-12364.43 ppm
2013-09-105701-008-12300.647 ppm
2013-10-085701-001-10387.83 ppm
2013-10-085701-006-10404.35 ppm
2013-10-085701-008-10280.607 ppm
2013-11-065701-001-10277.81 ppm
2013-11-065701-006-10294.32 ppm
2013-11-065701-008-10170.0316 ppm
2013-11-205701-008-13512.39 ppm
2013-12-105701-001-10407.90 ppm
2013-12-105701-006-10424.45 ppm
2013-12-105701-008-10332.74 ppm
2014-01-075701-001-10197.96 ppm
2014-01-075701-006-10214.52 ppm
2014-01-075701-008-10163.05 ppm
2014-02-045701-001-09317.95 ppm
2014-02-045701-006-09294.47 ppm
2014-02-045701-008-09203.33 ppm
2014-02-255701-005-13181.16 ppm
2014-03-045701-001-14597.77 ppm
2014-03-045701-006-14574.49 ppm
2014-03-045701-008-14503.49 ppm
2014-04-085701-001-09317.84 ppm
2014-04-085701-006-09314.41 ppm
2014-05-065810-001-13567.45 ppm
2014-05-065701-006-13514.01 ppm
2014-05-065701-008-14341.79 ppm
2014-06-035701-001-14307.86 ppm
2014-06-035701-006-14294.01 ppm
2014-06-035701-008-15071.49 ppm
2014-07-085701-001-10527.73 ppm
2014-07-085701-006-10544.01 ppm
2014-07-085701-008-11000.986 ppm
2014-08-065701-001-09557.77 ppm
2014-08-065701-006-09563.86 ppm
2014-08-065701-008-10000.395 ppm
2014-09-095701-001-15297.55 ppm
2014-09-095701-006-15333.79 ppm
2014-09-095701-008-15381.14 ppm
2014-10-075701-001-11267.77 ppm
2014-10-075701-006-11313.87 ppm
2014-10-075701-008-11441.03 ppm
2014-11-045701-001-11237.84 ppm
2014-11-045701-006-11293.85 ppm
2014-11-045701-008-11342.00 ppm
2014-12-045701-001-15298.00 ppm
2014-12-045701-006-15363.97 ppm
2014-12-045701-008-15482.88 ppm
2015-01-065806-001-12137.45 ppm
2015-01-065806-006-12103.61 ppm
2015-01-065806-008-12182.94 ppm
2015-02-025810-006-14163.84 ppm
2015-02-035701-001-10117.94 ppm
2015-02-035701-008-10073.71 ppm
2015-02-245701-005-14181.76 ppm
2015-03-105701-001-10047.87 ppm
2015-03-105701-006-10034.04 ppm
2015-03-105701-008-09573.54 ppm
2015-04-075701-001-11017.89 ppm
2015-04-075701-006-11043.81 ppm
2015-05-055701-001-10487.94 ppm
2015-05-055701-006-10463.88 ppm
2015-05-135701-008-12001.58 ppm
2015-06-025701-001-00008.06 ppm
2015-06-025701-006-00003.86 ppm
2015-07-145701-001-12097.98 ppm
2015-07-145701-006-12083.77 ppm
2015-08-045701-001-13397.98 ppm
2015-08-045701-006-13373.81 ppm
2015-08-045701-008-13420.944 ppm
2015-09-085701-001-14577.87 ppm
2015-09-085701-006-14573.75 ppm
2015-10-135701-001-15177.86 ppm
2015-10-135701-006-15203.76 ppm
2015-11-035701-001-12567.99 ppm
2015-11-035701-006-12543.81 ppm
2015-11-035701-008-12374.32 ppm
2015-12-085701-001-15208.12 ppm
2015-12-085701-006-15263.76 ppm
2016-01-065701-001-08268.03 ppm
2016-01-065701-006-08233.80 ppm
2016-02-095701-001-10398.02 ppm
2016-02-095701-005-11071.21 ppm
2016-02-095701-006-10363.94 ppm
2016-02-095701-008-11054.79 ppm
2016-03-155701-001-10598.01 ppm
2016-03-155701-006-10534.32 ppm
2016-04-055701-001-10088.06 ppm
2016-04-055701-006-10063.99 ppm
2016-05-035701-001-12448.13 ppm
2016-05-035701-006-12364.02 ppm
2016-05-035701-008-12262.54 ppm
2016-06-145701-001-12047.99 ppm
2016-06-145701-006-12063.97 ppm
2016-07-055701-001-10068.04 ppm
2016-07-055701-006-10034.00 ppm
2016-08-025701-001-11358.05 ppm
2016-08-025701-006-11273.87 ppm
2016-08-025701-008-11130.879 ppm
2016-09-065701-001-15118.07 ppm
2016-09-065701-006-14593.89 ppm
2016-10-045701-001-14528.29 ppm
2016-10-045701-006-14463.90 ppm
2016-11-085701-001-14357.95 ppm
2016-11-085701-006-14183.90 ppm
2016-11-085701-008-14481.75 ppm
2016-12-065701-001-12388.03 ppm
2016-12-065701-006-12403.93 ppm
2017-01-105701-001-10128.18 ppm
2017-01-105701-006-10104.05 ppm
2017-02-075701-001-11378.53 ppm
2017-02-075701-005-11201.01 ppm
2017-02-075701-006-11425.83 ppm
2017-02-075701-008-11301.81 ppm
2017-03-075701-001-13338.84 ppm
2017-03-075701-006-13417.41 ppm
2017-04-045701-001-15268.42 ppm
2017-04-045701-006-15284.32 ppm
2017-05-085810-001-12484.10 ppm
2017-05-235701-001-11158.22 ppm
2017-05-235701-006-11094.48 ppm
2017-05-235701-008-11201.11 ppm
2017-06-065701-001-12448.29 ppm
2017-06-065701-006-12464.55 ppm
2017-07-115701-001-10298.10 ppm
2017-07-115701-006-10274.49 ppm
2017-08-085701-001-10308.01 ppm
2017-08-085701-006-10324.42 ppm
2017-08-085701-008-10220.521 ppm
2017-09-055701-001-15178.20 ppm
2017-09-055701-006-15134.43 ppm
2017-10-035701-001-14318.13 ppm
2017-11-145701-001-10507.81 ppm
2017-11-145701-008-10471.48 ppm
2017-12-055701-001-10438.29 ppm