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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

Lake Hemet Municipal Water District

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

 

249

Samples

13

Samples exceeding legal limit (MCL)

247

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20144.41 ppm27270.655 ppm - 13.1 ppm
20155.66 ppm13130.655 ppm - 11.1 ppm
20167.57 ppm3230ND - 21.0 ppm
20172.53 ppm58580.610 ppm - 6.50 ppm
20182.41 ppm64640.600 ppm - 5.80 ppm
20191.98 ppm55550.490 ppm - 6.40 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
2014-01-304790-017-07003.61 ppm
2014-03-114790-036-08053.84 ppm
2014-04-304790-003-09004.52 ppm
2014-05-204790-011-10357.23 ppm
2014-05-204790-018-10207.91 ppm
2014-05-204790-029-10307.68 ppm
2014-05-214790-019-08452.26 ppm
2014-05-214790-030-09151.20 ppm
2014-05-214790-032-10001.04 ppm
2014-08-191379-003-11154.74 ppm
2014-08-191379-012-10551.04 ppm
2014-08-191379-014-10103.16 ppm
2014-08-191379-018-10507.91 ppm
2014-08-191379-019-07552.94 ppm
2014-08-191379-028-11052.94 ppm
2014-08-191379-029-09557.91 ppm
2014-08-191379-030-11300.655 ppm
2014-08-191379-032-11200.836 ppm
2014-08-191379-036-11403.61 ppm
2014-08-191379-050-08002.03 ppm
2014-08-214790-011-10108.58 ppm
2014-08-214790-018-10456.55 ppm
2014-08-214790-029-10156.78 ppm
2014-09-094790-012-09050.926 ppm
2014-09-104790-014-091013.1 ppm
2014-09-114790-028-13552.48 ppm
2014-09-124790-014-11303.61 ppm
2015-02-104790-029-100011.1 ppm
2015-02-124790-014-09453.84 ppm
2015-02-124790-029-093510.4 ppm
2015-02-124790-035-09356.10 ppm
2015-02-184790-029-08359.94 ppm
2015-02-184790-035-08357.00 ppm
2015-08-111379-003-08505.20 ppm
2015-08-111379-018-09058.58 ppm
2015-08-111379-030-08250.655 ppm
2015-08-111379-032-08351.06 ppm
2015-08-111379-036-08004.29 ppm
2015-11-054790-003-10004.70 ppm
2015-11-054790-028-09450.810 ppm
2016-03-093761-028-09452.60 ppm
2016-05-103761-011-074421.0 ppm
2016-05-103761-014-074012.0 ppm
2016-05-103761-029-074618.0 ppm
2016-05-103761-035-075015.0 ppm
2016-06-013761-012-09200.670 ppm
2016-06-023761-014-131013.0 ppm
2016-06-083761-003-09555.40 ppm
2016-06-153761-050-09004.80 ppm
2016-06-233761-018-13308.30 ppm
2016-06-243761-011-073015.0 ppm
2016-06-243761-014-072514.0 ppm
2016-06-243761-029-073017.0 ppm
2016-06-243761-035-093015.0 ppm
2016-08-033761-012-06200.760 ppm
2016-08-081379-003-09304.90 ppm
2016-08-081379-018-10308.80 ppm
2016-08-081379-028-09152.50 ppm
2016-08-081379-030-09550.510 ppm
2016-08-081379-032-09451.30 ppm
2016-08-081379-036-10153.60 ppm
2016-08-081379-050-08402.40 ppm
2016-08-083761-050-08402.50 ppm
2016-08-161379-011-082717.0 ppm
2016-08-161379-012-08201.000 ppm
2016-08-161379-014-08254.80 ppm
2016-08-161379-019-0810ND
2016-08-163761-019-0810ND
2016-08-161379-029-08307.30 ppm
2016-09-143761-018-08459.50 ppm
2016-10-193761-018-08458.50 ppm
2016-11-093761-003-09005.00 ppm
2017-02-223761-003-11505.30 ppm
2017-03-083761-036-09053.70 ppm
2017-03-133761-018-14156.50 ppm
2017-04-053761-003-09105.20 ppm
2017-04-063761-019-12502.60 ppm
2017-05-013761-014-09305.10 ppm
2017-05-083761-014-15054.60 ppm
2017-05-103761-018-10255.40 ppm
2017-05-153761-014-14204.90 ppm
2017-05-153761-030-14400.630 ppm
2017-05-223761-014-10154.30 ppm
2017-05-313761-014-08153.40 ppm
2017-06-053761-014-11453.10 ppm
2017-06-123761-014-14302.80 ppm
2017-06-193761-014-08502.30 ppm
2017-06-263761-014-09352.10 ppm
2017-06-263761-032-15201.000 ppm
2017-07-033761-014-10301.90 ppm
2017-07-103761-014-09201.80 ppm
2017-07-173761-003-11155.20 ppm
2017-07-173761-014-10451.80 ppm
2017-07-243761-014-09301.80 ppm
2017-07-313761-014-11201.70 ppm
2017-08-021379-003-13305.30 ppm
2017-08-021379-012-09300.680 ppm
2017-08-021379-018-09505.80 ppm
2017-08-021379-030-13450.610 ppm
2017-08-021379-032-10101.30 ppm
2017-08-021379-050-08102.20 ppm
2017-08-083761-014-10101.70 ppm
2017-08-153761-014-10001.60 ppm
2017-08-213761-014-09301.50 ppm
2017-08-211379-014-11451.60 ppm
2017-08-211379-028-12001.70 ppm
2017-08-283761-014-09001.60 ppm
2017-09-013761-014-09551.50 ppm
2017-09-053761-012-10350.820 ppm
2017-09-053761-028-10502.30 ppm
2017-09-063761-014-07501.40 ppm
2017-09-133761-014-08001.40 ppm
2017-09-203761-014-08201.60 ppm
2017-09-273761-014-07351.30 ppm
2017-09-273761-019-08452.30 ppm
2017-10-043761-003-09155.30 ppm
2017-10-043761-014-08251.20 ppm
2017-10-113761-014-08502.20 ppm
2017-10-183761-014-08201.30 ppm
2017-10-253761-014-08401.20 ppm
2017-11-013761-014-08451.20 ppm
2017-11-083761-014-08551.80 ppm
2017-11-153761-014-08101.30 ppm
2017-11-153761-018-08406.20 ppm
2017-11-223761-014-08101.30 ppm
2017-11-293761-014-08401.30 ppm
2017-12-063761-014-08352.10 ppm
2017-12-133761-014-08251.40 ppm
2017-12-203761-014-08402.40 ppm
2017-12-273761-014-08401.20 ppm
2018-01-033761-014-08502.60 ppm
2018-01-033761-018-10453.60 ppm
2018-01-103761-014-08352.00 ppm
2018-01-173761-014-08102.20 ppm
2018-01-243761-014-08351.10 ppm
2018-01-313761-014-08351.10 ppm
2018-02-073761-003-09154.90 ppm
2018-02-073761-014-08352.10 ppm
2018-02-143761-014-08251.90 ppm
2018-02-213761-014-08252.30 ppm
2018-02-283761-014-08402.10 ppm
2018-03-073761-014-08402.10 ppm
2018-03-073761-036-09553.40 ppm
2018-03-213761-014-08501.80 ppm
2018-03-283761-014-08052.00 ppm
2018-04-043761-014-08201.10 ppm
2018-04-113761-014-08301.000 ppm
2018-04-113761-018-09202.50 ppm
2018-04-183761-014-08401.10 ppm
2018-04-253761-014-08201.000 ppm
2018-05-023761-003-10355.20 ppm
2018-05-023761-014-09352.20 ppm
2018-05-093761-014-08202.50 ppm
2018-05-093761-019-08550.940 ppm
2018-05-163761-014-08303.00 ppm
2018-05-233761-014-08301.50 ppm
2018-05-303761-014-08301.10 ppm
2018-06-063761-014-08251.10 ppm
2018-06-133761-014-08101.30 ppm
2018-06-203761-014-08101.10 ppm
2018-06-273761-014-06501.60 ppm
2018-07-053761-014-08003.20 ppm
2018-07-113761-014-08101.20 ppm
2018-07-113761-018-09053.90 ppm
2018-07-113761-032-09051.10 ppm
2018-07-173761-014-07501.20 ppm
2018-07-253761-014-06053.70 ppm
2018-08-013761-003-09105.10 ppm
2018-08-013761-014-08101.30 ppm
2018-08-013761-028-09002.70 ppm
2018-08-013761-050-08351.90 ppm
2018-08-083761-014-08001.30 ppm
2018-08-131379-003-09504.90 ppm
2018-08-131379-012-09151.40 ppm
2018-08-131379-018-09253.50 ppm
2018-08-131379-019-09050.800 ppm
2018-08-131379-028-09352.50 ppm
2018-08-131379-030-10200.600 ppm
2018-08-131379-032-10051.10 ppm
2018-08-131379-050-08551.80 ppm
2018-08-151379-014-08254.60 ppm
2018-08-153761-014-08254.80 ppm
2018-08-223761-014-08411.30 ppm
2018-08-293761-014-08351.40 ppm
2018-09-053761-014-08451.70 ppm
2018-09-123761-014-08503.00 ppm
2018-09-193761-014-08451.40 ppm
2018-09-263761-014-08104.70 ppm
2018-10-033761-014-08455.30 ppm
2018-10-103761-014-09301.50 ppm
2018-10-103761-018-09554.40 ppm
2018-10-173761-014-09455.80 ppm
2018-10-243761-014-08252.70 ppm
2018-11-073761-003-08455.30 ppm
2019-01-093761-014-08501.90 ppm
2019-01-163761-014-09001.80 ppm
2019-01-163761-018-09352.20 ppm
2019-03-063761-036-09004.00 ppm
2019-03-113761-014-15303.50 ppm
2019-03-133761-014-08252.10 ppm
2019-03-193761-014-09002.10 ppm
2019-04-173761-018-08352.10 ppm
2019-05-013761-014-08102.40 ppm
2019-05-083761-014-08301.90 ppm
2019-05-153761-014-08101.80 ppm
2019-05-213761-014-08001.80 ppm
2019-05-293761-014-08001.70 ppm
2019-06-053761-014-08001.80 ppm
2019-06-123761-014-08201.70 ppm
2019-06-193761-014-08101.60 ppm
2019-06-263761-014-08501.60 ppm
2019-07-033761-014-08051.50 ppm
2019-07-103761-014-07501.50 ppm
2019-07-103761-018-09451.80 ppm
2019-07-173761-014-08001.40 ppm
2019-07-243761-014-07451.40 ppm
2019-07-313761-014-08001.30 ppm
2019-08-054790-003-09255.10 ppm
2019-08-054790-012-09501.30 ppm
2019-08-054790-014-10401.20 ppm
2019-08-054790-018-10001.70 ppm
2019-08-054790-019-10150.900 ppm
2019-08-054790-028-09401.50 ppm
2019-08-054790-032-09101.10 ppm
2019-08-054790-036-08403.70 ppm
2019-08-054790-050-10251.70 ppm
2019-08-073761-014-08501.40 ppm
2019-08-143761-014-07251.30 ppm
2019-08-203761-050-08302.10 ppm
2019-08-213761-014-07451.30 ppm
2019-08-214790-030-09000.490 ppm
2019-08-283761-014-07301.30 ppm
2019-09-043761-014-07001.30 ppm
2019-09-113761-014-07501.20 ppm
2019-09-183761-014-08451.20 ppm
2019-10-033761-014-07002.10 ppm
2019-10-163761-018-07003.20 ppm
2019-11-043761-014-07201.50 ppm
2019-11-063761-003-09056.40 ppm
2019-11-063761-014-08151.20 ppm
2019-11-133761-014-07401.30 ppm
2019-11-203761-014-08451.20 ppm
2019-12-033761-003-09456.10 ppm
2019-12-033761-014-08501.000 ppm
2019-12-103761-003-08306.10 ppm
2019-12-113761-014-07301.000 ppm
2019-12-183761-014-07501.000 ppm
2019-12-233761-014-07451.000 ppm
2019-12-303761-014-08100.980 ppm