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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

California American Water Company - Lincoln Oaks

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

 

290

Samples

0

Samples exceeding legal limit (MCL)

286

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.88 ppm8482ND - 4.04 ppm
20152.05 ppm5553ND - 6.71 ppm
20162.80 ppm26260.220 ppm - 7.02 ppm
20173.27 ppm25250.180 ppm - 6.94 ppm
20182.59 ppm50500.440 ppm - 6.91 ppm
20192.53 ppm50500.220 ppm - 6.99 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
2014-01-141225-016-09151.89 ppm
2014-01-141225-033-09252.33 ppm
2014-01-151225-027-09101.57 ppm
2014-01-151225-031-09331.58 ppm
2014-02-181225-016-11501.90 ppm
2014-02-181225-027-12051.58 ppm
2014-02-181225-031-12451.54 ppm
2014-02-181225-033-12101.87 ppm
2014-03-121225-027-12281.61 ppm
2014-03-131225-016-10001.91 ppm
2014-03-131225-033-10101.82 ppm
2014-04-081225-016-09401.91 ppm
2014-04-081225-027-09051.57 ppm
2014-04-081225-031-09241.56 ppm
2014-04-081225-033-09501.75 ppm
2014-05-065810-004-11382.71 ppm
2014-05-065810-005-10302.71 ppm
2014-05-065810-009-12283.61 ppm
2014-05-065810-013-11302.71 ppm
2014-05-065810-014-09452.94 ppm
2014-05-065810-015-10452.48 ppm
2014-05-061225-016-10101.87 ppm
2014-05-065810-016-10101.78 ppm
2014-05-065810-019-08451.51 ppm
2014-05-065810-023-12301.45 ppm
2014-05-061225-033-10401.44 ppm
2014-05-075810-001-1030ND
2014-05-075810-003-12201.83 ppm
2014-05-075810-006-10102.17 ppm
2014-05-075810-007-11201.38 ppm
2014-05-075810-012-13303.39 ppm
2014-05-075810-026-09200.881 ppm
2014-05-071225-027-09191.59 ppm
2014-05-075810-027-09271.45 ppm
2014-05-075810-028-11251.29 ppm
2014-05-071225-031-09421.59 ppm
2014-05-085810-008-09452.48 ppm
2014-05-085810-010-11452.26 ppm
2014-06-245810-002-10300.768 ppm
2014-06-241225-016-11151.87 ppm
2014-06-241225-027-09231.59 ppm
2014-06-241225-031-09421.59 ppm
2014-06-241225-033-11351.86 ppm
2014-07-015810-022-09201.70 ppm
2014-07-221225-027-09201.57 ppm
2014-07-221225-031-09421.57 ppm
2014-08-111225-001-10351.43 ppm
2014-08-111225-002-1000ND
2014-08-111225-004-13254.04 ppm
2014-08-111225-005-10152.75 ppm
2014-08-111225-006-10202.15 ppm
2014-08-111225-009-09453.32 ppm
2014-08-111225-013-12152.97 ppm
2014-08-111225-014-12302.29 ppm
2014-08-111225-019-11552.37 ppm
2014-08-111225-023-11001.48 ppm
2014-08-111225-026-09100.958 ppm
2014-08-111225-028-11111.27 ppm
2014-08-121225-003-12451.92 ppm
2014-08-121225-012-13403.30 ppm
2014-08-121225-015-09501.28 ppm
2014-08-121225-027-08551.57 ppm
2014-08-121225-031-09171.58 ppm
2014-08-131225-008-10102.49 ppm
2014-08-131225-010-11103.62 ppm
2014-08-211225-016-11151.93 ppm
2014-08-211225-033-11353.30 ppm
2014-09-031225-027-09001.64 ppm
2014-09-031225-031-09211.64 ppm
2014-09-101225-016-11051.90 ppm
2014-09-101225-033-11251.69 ppm
2014-10-161225-016-12121.94 ppm
2014-10-161225-033-12201.93 ppm
2014-10-281225-027-09351.54 ppm
2014-10-281225-031-09451.54 ppm
2014-11-101225-025-11102.08 ppm
2014-11-181225-016-10151.81 ppm
2014-11-181225-027-11251.54 ppm
2014-11-181225-031-11351.53 ppm
2014-11-181225-033-10250.874 ppm
2014-12-031225-016-11201.85 ppm
2014-12-031225-027-10001.53 ppm
2014-12-031225-031-10301.51 ppm
2014-12-031225-033-11300.922 ppm
2015-01-081225-016-11001.84 ppm
2015-01-081225-027-10201.60 ppm
2015-01-081225-031-10301.57 ppm
2015-01-081225-033-11201.03 ppm
2015-02-021225-027-12151.58 ppm
2015-02-021225-031-12401.61 ppm
2015-02-251225-016-09151.84 ppm
2015-02-251225-033-09250.962 ppm
2015-03-181225-027-10101.57 ppm
2015-03-181225-031-10301.55 ppm
2015-03-241225-016-10251.93 ppm
2015-03-241225-033-10350.795 ppm
2015-04-091225-027-10401.63 ppm
2015-04-091225-031-11001.63 ppm
2015-04-221225-016-08521.88 ppm
2015-04-221225-033-08520.581 ppm
2015-05-051225-027-12001.64 ppm
2015-05-051225-031-12351.62 ppm
2015-05-121225-007-10101.24 ppm
2015-05-271233-021-11436.33 ppm
2015-05-281225-016-08351.85 ppm
2015-05-281225-033-0835ND
2015-06-181225-016-10351.92 ppm
2015-06-181225-024-12003.79 ppm
2015-06-181225-033-1035ND
2015-06-301225-024-11203.81 ppm
2015-06-301225-024-11203.81 ppm
2015-07-281225-016-09381.83 ppm
2015-07-281225-016-09381.83 ppm
2015-08-101225-004-09152.62 ppm
2015-08-101225-005-11002.80 ppm
2015-08-101225-019-12202.19 ppm
2015-08-101225-026-09400.960 ppm
2015-08-111225-009-10554.46 ppm
2015-08-111225-012-12503.37 ppm
2015-08-111225-014-08552.38 ppm
2015-08-111225-025-08201.36 ppm
2015-08-111225-028-10251.35 ppm
2015-08-131225-001-10551.07 ppm
2015-08-131225-006-10452.32 ppm
2015-08-131225-015-08401.34 ppm
2015-08-181225-002-10050.160 ppm
2015-08-181225-013-10403.12 ppm
2015-08-181225-021-09254.01 ppm
2015-08-191225-007-12301.57 ppm
2015-08-191225-010-09400.870 ppm
2015-08-191225-016-09451.87 ppm
2015-08-191225-023-11401.46 ppm
2015-08-191225-024-12553.80 ppm
2015-08-241225-008-13052.51 ppm
2015-08-251225-003-11552.01 ppm
2015-09-241225-016-11001.87 ppm
2015-11-171225-016-11421.86 ppm
2015-11-171225-021-08406.71 ppm
2015-12-071225-016-09501.67 ppm
2016-02-101233-021-08507.00 ppm
2016-02-251233-016-09451.80 ppm
2016-04-211225-016-09401.91 ppm
2016-05-091225-024-11103.84 ppm
2016-05-261225-016-10301.91 ppm
2016-05-261225-021-08256.76 ppm
2016-08-171225-002-11080.220 ppm
2016-08-171225-013-11353.25 ppm
2016-08-171225-014-09352.49 ppm
2016-08-171225-015-09551.17 ppm
2016-08-171225-019-12221.65 ppm
2016-08-171225-021-08456.79 ppm
2016-08-171225-023-12301.50 ppm
2016-08-231225-004-10102.58 ppm
2016-08-231225-005-08202.79 ppm
2016-08-231225-006-09552.19 ppm
2016-08-231225-024-11103.46 ppm
2016-08-241225-009-09305.01 ppm
2016-08-241225-012-08403.40 ppm
2016-08-241225-025-11551.36 ppm
2016-08-241225-026-08481.03 ppm
2016-08-241225-028-10401.29 ppm
2016-10-251225-001-13051.25 ppm
2016-11-021225-021-08137.02 ppm
2016-11-031225-010-09500.500 ppm
2016-11-161225-007-12580.710 ppm
2017-02-081225-021-11156.63 ppm
2017-04-051225-022-12051.79 ppm
2017-04-271225-009-09556.78 ppm
2017-05-081225-021-12006.94 ppm
2017-05-081225-024-11183.08 ppm
2017-07-131225-009-10205.55 ppm
2017-08-031225-005-09382.91 ppm
2017-08-031225-006-08531.77 ppm
2017-08-031225-015-07371.20 ppm
2017-08-031225-025-08051.07 ppm
2017-08-101225-001-08471.21 ppm
2017-08-101225-002-08050.180 ppm
2017-08-101225-004-11552.54 ppm
2017-08-101225-023-12401.56 ppm
2017-08-101225-026-07421.000 ppm
2017-08-101225-028-09151.32 ppm
2017-08-151225-012-12233.48 ppm
2017-08-151225-013-13193.33 ppm
2017-08-151225-014-11473.20 ppm
2017-08-151225-021-10556.83 ppm
2017-08-221225-010-12101.59 ppm
2017-10-191225-009-12556.45 ppm
2017-10-191225-019-10353.08 ppm
2017-11-131225-021-11106.84 ppm
2017-12-191225-003-09141.52 ppm
2018-01-231225-009-09296.45 ppm
2018-02-131233-016-09552.10 ppm
2018-02-131225-021-08156.84 ppm
2018-02-191225-007-13051.79 ppm
2018-03-121225-016-08301.96 ppm
2018-03-121225-032-08302.02 ppm
2018-03-121225-033-08302.25 ppm
2018-04-031225-009-12156.42 ppm
2018-05-011225-016-08351.97 ppm
2018-05-021225-021-08406.84 ppm
2018-05-081225-016-11102.02 ppm
2018-05-081225-033-11101.82 ppm
2018-06-181225-016-09551.99 ppm
2018-06-181225-033-09552.77 ppm
2018-07-171225-016-08422.06 ppm
2018-07-171225-033-08422.02 ppm
2018-08-061233-015-08350.920 ppm
2018-08-061233-019-11401.40 ppm
2018-08-061233-026-09100.790 ppm
2018-08-071233-004-13103.10 ppm
2018-08-071233-005-08402.50 ppm
2018-08-071233-009-12156.50 ppm
2018-08-071233-023-10551.30 ppm
2018-08-071233-024-09522.60 ppm
2018-08-081233-006-12501.70 ppm
2018-08-081233-014-11402.20 ppm
2018-08-081233-021-10105.80 ppm
2018-08-131233-001-10350.960 ppm
2018-08-131233-002-08400.440 ppm
2018-08-131233-012-08403.00 ppm
2018-08-131233-013-09552.70 ppm
2018-08-131225-016-12002.06 ppm
2018-08-131233-016-12001.40 ppm
2018-08-131233-025-11000.720 ppm
2018-08-131233-028-12200.880 ppm
2018-08-131225-033-12002.09 ppm
2018-08-131233-033-12001.70 ppm
2018-08-151233-010-08401.10 ppm
2018-08-161233-003-08201.10 ppm
2018-08-161233-008-10451.70 ppm
2018-09-191225-016-11152.01 ppm
2018-09-191225-033-11151.87 ppm
2018-10-171225-016-08252.08 ppm
2018-10-171225-033-08352.18 ppm
2018-11-061225-009-10505.71 ppm
2018-11-061225-016-09312.11 ppm
2018-11-061225-021-10406.91 ppm
2018-11-061225-033-09412.16 ppm
2018-12-111225-016-14002.11 ppm
2018-12-111225-033-14152.41 ppm
2019-01-081225-016-10102.09 ppm
2019-01-081225-033-10201.87 ppm
2019-02-051225-016-12402.11 ppm
2019-02-051225-033-12552.24 ppm
2019-02-061225-021-11156.98 ppm
2019-03-121225-016-12201.96 ppm
2019-03-121225-033-12351.97 ppm
2019-04-091225-016-13252.07 ppm
2019-04-091225-033-13402.38 ppm
2019-05-071225-016-15301.97 ppm
2019-05-071225-021-12306.76 ppm
2019-05-071225-033-15451.71 ppm
2019-05-291225-009-12356.48 ppm
2019-06-181225-016-13502.00 ppm
2019-06-181225-033-14052.19 ppm
2019-07-091225-016-13501.94 ppm
2019-07-091225-033-14051.95 ppm
2019-08-061225-001-11251.25 ppm
2019-08-061225-002-11500.220 ppm
2019-08-061225-005-14102.82 ppm
2019-08-061225-008-12352.38 ppm
2019-08-061225-009-15154.41 ppm
2019-08-061225-010-13201.44 ppm
2019-08-061225-014-14352.02 ppm
2019-08-061225-015-12501.21 ppm
2019-08-061225-016-16002.09 ppm
2019-08-061225-019-11101.85 ppm
2019-08-061225-021-11156.99 ppm
2019-08-061225-024-14502.82 ppm
2019-08-061225-026-10300.900 ppm
2019-08-061225-028-10501.38 ppm
2019-08-061225-033-16152.10 ppm
2019-08-071225-006-13201.67 ppm
2019-08-071225-012-11302.89 ppm
2019-08-071225-013-12253.58 ppm
2019-08-071225-023-15551.58 ppm
2019-08-081225-003-12001.71 ppm
2019-09-101225-016-12001.89 ppm
2019-09-101225-033-12151.85 ppm
2019-10-171225-016-12351.94 ppm
2019-10-171225-033-12452.01 ppm
2019-11-181225-009-10506.44 ppm
2019-11-181225-016-11151.94 ppm
2019-11-181225-033-11251.96 ppm
2019-11-201225-021-14406.82 ppm
2019-11-261233-022-10551.80 ppm
2019-12-181225-016-12402.07 ppm
2019-12-181225-033-12501.01 ppm
2019-12-201233-016-07151.50 ppm
2019-12-201233-033-07201.20 ppm