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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

Glendora Water Department

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

 

262

Samples

0

Samples exceeding legal limit (MCL)

229

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20143.98 ppm50500.904 ppm - 6.55 ppm
20151.21 ppm54540.520 ppm - 2.19 ppm
20161.81 ppm5146ND - 6.30 ppm
20170.295 ppm208ND - 1.20 ppm
20181.52 ppm3327ND - 3.70 ppm
20190.532 ppm5444ND - 1.90 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
2014-01-023761-026-07104.74 ppm
2014-01-073761-026-14103.39 ppm
2014-01-143761-026-07434.52 ppm
2014-01-213761-026-07304.97 ppm
2014-01-283761-026-07255.42 ppm
2014-02-043761-026-07283.61 ppm
2014-02-113761-026-07352.48 ppm
2014-02-183761-026-07133.16 ppm
2014-02-253761-026-07305.20 ppm
2014-03-043761-026-07156.55 ppm
2014-03-113761-026-07154.52 ppm
2014-03-183761-026-07105.65 ppm
2014-03-253761-026-06455.20 ppm
2014-04-013761-026-07153.39 ppm
2014-04-083761-026-07304.97 ppm
2014-04-153761-026-13495.42 ppm
2014-04-223761-026-07156.33 ppm
2014-04-293761-026-07455.20 ppm
2014-05-063761-026-07155.20 ppm
2014-05-133761-026-07255.65 ppm
2014-05-203761-026-07154.97 ppm
2014-05-273761-026-00004.97 ppm
2014-06-033761-026-09304.97 ppm
2014-06-103761-026-07175.42 ppm
2014-06-173761-026-08004.52 ppm
2014-06-243761-026-07304.52 ppm
2014-07-013761-026-07304.07 ppm
2014-07-083761-026-07153.61 ppm
2014-07-153761-026-07052.71 ppm
2014-07-223761-026-07163.84 ppm
2014-07-293761-026-11202.12 ppm
2014-08-053761-026-07182.71 ppm
2014-08-123761-026-07152.94 ppm
2014-08-193761-026-07154.29 ppm
2014-08-263761-026-07002.94 ppm
2014-09-023761-026-13452.94 ppm
2014-09-093761-026-08003.39 ppm
2014-09-163761-026-07003.39 ppm
2014-09-233761-026-14204.74 ppm
2014-09-303761-026-07204.97 ppm
2014-10-073761-026-14004.97 ppm
2014-10-143761-026-07354.97 ppm
2014-10-213761-026-07302.94 ppm
2014-11-183761-026-11353.84 ppm
2014-11-263761-026-07002.94 ppm
2014-12-033761-026-07251.49 ppm
2014-12-093761-026-07151.24 ppm
2014-12-163761-026-14030.904 ppm
2014-12-233761-026-07311.13 ppm
2014-12-303761-026-07450.949 ppm
2015-01-063761-026-07400.904 ppm
2015-01-133761-026-07100.949 ppm
2015-01-203761-026-07450.836 ppm
2015-01-273761-026-14070.791 ppm
2015-02-033761-026-06500.971 ppm
2015-02-103761-026-07302.01 ppm
2015-02-173761-026-07001.04 ppm
2015-03-173761-026-07502.19 ppm
2015-03-243761-026-07300.745 ppm
2015-03-273761-026-07300.587 ppm
2015-03-313761-026-11250.520 ppm
2015-04-073761-026-11190.565 ppm
2015-04-143761-026-07150.520 ppm
2015-04-213761-026-12300.542 ppm
2015-04-283761-026-07300.610 ppm
2015-05-053761-026-07500.610 ppm
2015-05-123761-026-07201.24 ppm
2015-05-193761-026-06491.15 ppm
2015-05-263761-026-07201.15 ppm
2015-06-023761-026-07201.22 ppm
2015-06-093761-026-14001.24 ppm
2015-06-163761-026-07361.15 ppm
2015-06-233761-026-07001.24 ppm
2015-06-303761-026-07151.06 ppm
2015-07-073761-026-07101.40 ppm
2015-07-143761-026-07051.31 ppm
2015-07-213761-026-07131.06 ppm
2015-07-283761-026-07500.700 ppm
2015-08-043761-026-07301.45 ppm
2015-08-113761-026-07451.33 ppm
2015-08-183761-026-07311.40 ppm
2015-08-253761-026-08061.74 ppm
2015-09-013761-026-07151.54 ppm
2015-09-083761-026-08001.54 ppm
2015-09-163761-026-07201.51 ppm
2015-09-223761-026-07151.36 ppm
2015-09-293761-026-14351.47 ppm
2015-10-063761-026-07301.13 ppm
2015-10-133761-026-13461.38 ppm
2015-10-203761-026-07101.24 ppm
2015-10-273761-026-07151.38 ppm
2015-11-033761-026-07151.45 ppm
2015-11-103761-026-11121.47 ppm
2015-11-173761-026-07101.33 ppm
2015-11-243761-026-14051.50 ppm
2015-11-243761-026-14051.49 ppm
2015-12-013761-026-07151.60 ppm
2015-12-013761-026-07151.60 ppm
2015-12-083761-026-07051.90 ppm
2015-12-083761-026-07051.92 ppm
2015-12-153761-026-14081.20 ppm
2015-12-153761-026-14081.15 ppm
2015-12-223761-026-06521.10 ppm
2015-12-293761-026-07001.10 ppm
2016-01-053761-026-06501.20 ppm
2016-01-123761-026-07151.10 ppm
2016-01-193761-026-14055.60 ppm
2016-01-263761-026-07005.90 ppm
2016-02-023761-026-07156.30 ppm
2016-02-093761-026-07102.80 ppm
2016-02-163761-026-07102.50 ppm
2016-02-233761-026-07153.00 ppm
2016-03-013761-026-07202.70 ppm
2016-03-083761-026-07151.90 ppm
2016-03-153761-026-07001.90 ppm
2016-03-223761-026-12352.40 ppm
2016-03-293761-026-06352.10 ppm
2016-04-053761-026-07312.50 ppm
2016-04-123761-026-07151.80 ppm
2016-04-193761-026-07102.40 ppm
2016-04-263761-026-07102.40 ppm
2016-05-033761-026-07111.70 ppm
2016-05-103761-026-07201.40 ppm
2016-05-173761-026-09461.30 ppm
2016-05-243761-026-10471.000 ppm
2016-05-313761-026-06551.40 ppm
2016-06-073761-026-06391.30 ppm
2016-06-143761-026-13401.50 ppm
2016-06-213761-026-07104.00 ppm
2016-06-283761-026-06451.70 ppm
2016-07-053761-026-06253.20 ppm
2016-07-123761-026-13101.80 ppm
2016-07-193761-026-07002.40 ppm
2016-07-263761-026-07151.60 ppm
2016-08-023761-026-07151.60 ppm
2016-08-093761-026-07382.50 ppm
2016-08-163761-026-07001.80 ppm
2016-08-233761-026-07001.70 ppm
2016-08-303761-026-13350.580 ppm
2016-09-133761-026-07201.40 ppm
2016-09-203761-026-07151.70 ppm
2016-09-273761-026-13321.20 ppm
2016-10-043761-026-07481.30 ppm
2016-10-113761-026-0700ND
2016-10-183761-026-07070.520 ppm
2016-10-253761-026-07150.420 ppm
2016-11-013761-026-07200.840 ppm
2016-11-083761-026-14081.50 ppm
2016-11-153761-026-07151.40 ppm
2016-11-223761-026-07050.600 ppm
2016-11-293761-026-13500.440 ppm
2016-12-063761-026-0730ND
2016-12-133761-026-0705ND
2016-12-203761-026-0000ND
2016-12-273761-026-0715ND
2017-01-033761-026-0705ND
2017-01-103761-026-07000.780 ppm
2017-01-173761-026-07201.20 ppm
2017-01-243761-026-07080.640 ppm
2017-01-313761-026-13551.10 ppm
2017-02-073761-026-07350.460 ppm
2017-02-143761-026-0730ND
2017-02-213761-026-0755ND
2017-02-283761-026-0735ND
2017-03-073761-026-0700ND
2017-03-143761-026-0715ND
2017-03-213761-026-0700ND
2017-03-283761-026-0705ND
2017-04-043761-026-0728ND
2017-04-113761-026-07000.570 ppm
2017-04-183761-026-0700ND
2017-04-253761-026-0745ND
2017-05-023761-026-07450.530 ppm
2017-05-093761-026-07000.620 ppm
2017-05-163761-026-0740ND
2018-04-243761-026-10001.000 ppm
2018-05-013761-026-07100.840 ppm
2018-05-293761-026-0000ND
2018-06-053761-026-0710ND
2018-06-123761-026-06570.440 ppm
2018-06-193761-026-07151.50 ppm
2018-06-263761-026-07301.20 ppm
2018-07-033761-026-06451.40 ppm
2018-07-103761-026-07152.20 ppm
2018-07-173761-026-13502.30 ppm
2018-07-243761-026-07003.40 ppm
2018-07-313761-026-07302.20 ppm
2018-08-073761-026-06512.00 ppm
2018-08-143761-026-07452.70 ppm
2018-08-213761-026-06452.60 ppm
2018-08-283761-026-07153.10 ppm
2018-09-043761-026-07303.70 ppm
2018-09-113761-026-07052.40 ppm
2018-09-183761-026-07103.20 ppm
2018-09-253761-026-07153.40 ppm
2018-10-023761-026-07053.10 ppm
2018-10-093761-026-07001.000 ppm
2018-10-163761-026-06501.10 ppm
2018-10-233761-026-07351.30 ppm
2018-10-303761-026-07401.10 ppm
2018-11-063761-026-07451.60 ppm
2018-11-133761-026-14250.570 ppm
2018-11-203761-026-0715ND
2018-11-273761-026-0715ND
2018-12-043761-026-14100.410 ppm
2018-12-113761-026-0700ND
2018-12-183761-026-0955ND
2018-12-263761-026-06470.420 ppm
2019-01-023761-026-0745ND
2019-01-083761-026-14350.540 ppm
2019-01-153761-026-06500.510 ppm
2019-01-223761-026-0725ND
2019-01-293761-026-07000.440 ppm
2019-02-053761-026-11200.430 ppm
2019-02-123761-026-07450.530 ppm
2019-02-193761-026-07130.510 ppm
2019-02-263761-026-14000.590 ppm
2019-03-053761-026-07010.650 ppm
2019-03-123761-026-07300.660 ppm
2019-03-193761-026-13580.690 ppm
2019-03-263761-026-06450.660 ppm
2019-04-023761-026-12301.90 ppm
2019-04-093761-026-07000.620 ppm
2019-04-163761-026-13280.650 ppm
2019-04-233761-026-07000.660 ppm
2019-04-303761-026-07000.620 ppm
2019-05-073761-026-07250.690 ppm
2019-05-143761-026-07330.650 ppm
2019-05-213761-026-10420.620 ppm
2019-05-283761-026-00000.580 ppm
2019-06-043761-026-08150.710 ppm
2019-06-113761-026-12350.750 ppm
2019-06-183761-026-07281.10 ppm
2019-06-253761-026-07300.640 ppm
2019-07-023761-026-07280.730 ppm
2019-07-093761-026-06450.500 ppm
2019-07-163761-026-07400.510 ppm
2019-07-233761-026-07300.560 ppm
2019-07-303761-026-07290.480 ppm
2019-08-063761-026-08050.500 ppm
2019-08-133761-026-0725ND
2019-08-203761-026-07300.430 ppm
2019-08-273761-026-07300.430 ppm
2019-09-033761-026-07030.440 ppm
2019-09-103761-026-07500.410 ppm
2019-09-173761-026-07400.650 ppm
2019-09-243761-026-14101.20 ppm
2019-10-013761-026-07001.10 ppm
2019-10-013761-026-11161.10 ppm
2019-10-083761-026-06370.440 ppm
2019-10-153761-026-07200.650 ppm
2019-10-223761-026-06250.520 ppm
2019-10-293761-026-06300.610 ppm
2019-11-053761-026-07000.480 ppm
2019-11-123761-026-0750ND
2019-11-193761-026-0631ND
2019-11-263761-026-0707ND
2019-12-033761-026-07150.610 ppm
2019-12-103761-026-0711ND
2019-12-173761-026-0630ND
2019-12-233761-026-0810ND
2019-12-303761-026-0715ND