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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

California American Water Company - Antelope

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

 

141

Samples

0

Samples exceeding legal limit (MCL)

129

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.62 ppm3229ND - 4.12 ppm
20151.72 ppm21210.400 ppm - 3.81 ppm
20161.88 ppm18180.340 ppm - 3.86 ppm
20171.79 ppm1918ND - 4.12 ppm
20181.13 ppm2518ND - 4.28 ppm
20191.19 ppm2625ND - 3.80 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
2014-02-111225-008-11454.12 ppm
2014-05-065810-004-11160.836 ppm
2014-05-065810-010-1216ND
2014-05-065810-011-10381.36 ppm
2014-05-065810-013-11241.87 ppm
2014-05-065810-014-10292.94 ppm
2014-05-065810-018-13070.497 ppm
2014-05-075810-001-09351.78 ppm
2014-05-075810-002-11340.655 ppm
2014-05-075810-007-11000.881 ppm
2014-05-071225-008-12093.99 ppm
2014-05-075810-008-12093.84 ppm
2014-05-075810-009-10540.655 ppm
2014-05-075810-016-09300.881 ppm
2014-05-075810-017-10170.971 ppm
2014-08-111225-002-10050.723 ppm
2014-08-111225-009-11350.660 ppm
2014-08-111225-011-09401.38 ppm
2014-08-111225-013-12291.94 ppm
2014-08-111225-017-11151.42 ppm
2014-08-121225-001-09101.87 ppm
2014-08-121225-003-13211.15 ppm
2014-08-121225-004-11200.852 ppm
2014-08-121225-005-12433.47 ppm
2014-08-121225-006-12301.13 ppm
2014-08-121225-007-11200.951 ppm
2014-08-121225-008-10403.51 ppm
2014-08-121225-010-1325ND
2014-08-121225-014-10442.71 ppm
2014-08-121225-016-09550.908 ppm
2014-08-131225-018-1227ND
2014-12-091225-008-09253.78 ppm
2015-01-225810-012-14171.45 ppm
2015-02-111225-008-11543.81 ppm
2015-05-181233-008-10033.16 ppm
2015-08-051225-003-11101.28 ppm
2015-08-051225-005-12223.62 ppm
2015-08-051225-006-09451.16 ppm
2015-08-101225-011-08551.22 ppm
2015-08-101225-013-10211.97 ppm
2015-08-101225-014-11252.80 ppm
2015-08-111225-001-09151.90 ppm
2015-08-111225-002-12360.430 ppm
2015-08-111225-004-12550.800 ppm
2015-08-111225-007-09071.000 ppm
2015-08-111225-008-10143.38 ppm
2015-08-111225-009-10200.590 ppm
2015-08-111225-018-11450.460 ppm
2015-08-121225-010-08590.400 ppm
2015-08-121225-016-10500.900 ppm
2015-08-131225-012-11001.30 ppm
2015-08-131225-017-09090.680 ppm
2015-11-161225-008-09303.76 ppm
2016-02-101225-008-09353.62 ppm
2016-05-241225-008-11053.44 ppm
2016-08-101225-001-14112.00 ppm
2016-08-101225-009-13150.530 ppm
2016-08-101225-013-11112.02 ppm
2016-08-171225-010-11450.340 ppm
2016-08-171225-012-13122.00 ppm
2016-08-231225-002-09000.710 ppm
2016-08-231225-011-08321.38 ppm
2016-08-231225-016-10270.920 ppm
2016-08-231225-017-09470.670 ppm
2016-08-241225-005-12063.86 ppm
2016-08-241225-007-13351.09 ppm
2016-08-241225-014-10252.85 ppm
2016-08-291225-004-11030.940 ppm
2016-08-291225-008-13083.42 ppm
2016-08-301225-018-07170.470 ppm
2016-11-291225-008-09343.53 ppm
2017-02-091225-008-10053.09 ppm
2017-05-111225-008-09553.39 ppm
2017-08-151225-002-09400.720 ppm
2017-08-151225-009-13300.550 ppm
2017-08-151225-011-08021.82 ppm
2017-08-151225-016-11250.980 ppm
2017-08-161225-013-09122.06 ppm
2017-08-221225-001-10501.99 ppm
2017-08-221225-010-13350.420 ppm
2017-08-221225-014-09423.05 ppm
2017-08-221225-017-12451.52 ppm
2017-08-231225-007-12471.07 ppm
2017-08-231225-008-12423.95 ppm
2017-08-301225-012-11101.84 ppm
2017-08-301225-018-10300.520 ppm
2017-11-081225-008-10004.12 ppm
2017-12-181225-003-11451.73 ppm
2017-12-181225-006-10351.24 ppm
2017-12-181233-039-1350ND
2018-02-131233-039-1210ND
2018-02-151225-008-11004.16 ppm
2018-03-081225-039-0950ND
2018-03-081233-039-0950ND
2018-03-151233-039-1020ND
2018-04-031233-039-0940ND
2018-05-021225-008-11054.28 ppm
2018-05-021225-039-1050ND
2018-06-201225-039-12001.18 ppm
2018-08-071233-009-09000.440 ppm
2018-08-071233-010-1310ND
2018-08-071233-011-11201.30 ppm
2018-08-071233-012-10301.40 ppm
2018-08-071233-018-12100.400 ppm
2018-08-081233-002-09200.500 ppm
2018-08-081233-016-13400.810 ppm
2018-08-081233-017-10101.30 ppm
2018-08-091233-007-11300.890 ppm
2018-08-091233-008-10203.60 ppm
2018-08-141233-003-11301.40 ppm
2018-08-141233-004-08300.880 ppm
2018-08-141233-006-10000.920 ppm
2018-08-141233-013-12201.80 ppm
2018-08-141233-014-10452.00 ppm
2018-08-141233-040-10400.970 ppm
2019-01-101233-039-08500.920 ppm
2019-03-131233-039-09051.20 ppm
2019-04-101233-039-08320.920 ppm
2019-05-161225-001-13202.06 ppm
2019-06-121233-039-08280.850 ppm
2019-07-231233-039-08280.950 ppm
2019-08-061225-002-12200.800 ppm
2019-08-061233-003-13001.60 ppm
2019-08-061233-006-08301.000 ppm
2019-08-061225-009-14200.510 ppm
2019-08-061225-014-15151.93 ppm
2019-08-061225-016-13231.03 ppm
2019-08-061233-039-08361.000 ppm
2019-08-071225-001-14402.08 ppm
2019-08-071225-017-12550.950 ppm
2019-08-081225-004-16151.06 ppm
2019-08-081225-007-13021.09 ppm
2019-08-081225-008-12273.80 ppm
2019-08-081225-010-16300.420 ppm
2019-08-081225-012-13581.51 ppm
2019-08-081225-013-14002.20 ppm
2019-08-081225-018-14580.500 ppm
2019-09-101233-039-08350.830 ppm
2019-10-161233-039-0935ND
2019-11-051233-039-12350.940 ppm
2019-12-091233-039-08200.820 ppm