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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

East Pasadena Water Company

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

 

629

Samples

0

Samples exceeding legal limit (MCL)

629

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20143.67 ppm99990.565 ppm - 7.45 ppm
20153.62 ppm1121120.474 ppm - 7.45 ppm
20163.21 ppm1041040.750 ppm - 7.50 ppm
20173.37 ppm1041040.450 ppm - 6.90 ppm
20181.33 ppm1061060.550 ppm - 6.80 ppm
20190.747 ppm1041040.550 ppm - 1.10 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
2014-01-063761-006-08305.87 ppm
2014-01-063761-011-09150.745 ppm
2014-01-133761-006-08406.10 ppm
2014-01-133761-011-08550.745 ppm
2014-01-203761-006-09257.45 ppm
2014-01-203761-011-08500.858 ppm
2014-01-273761-006-08256.78 ppm
2014-01-273761-011-08550.633 ppm
2014-02-033761-006-08306.55 ppm
2014-02-033761-011-09400.723 ppm
2014-02-103761-006-08454.74 ppm
2014-02-103761-011-09000.768 ppm
2014-02-183761-006-08206.55 ppm
2014-02-183761-011-09100.813 ppm
2014-02-243761-006-08405.87 ppm
2014-02-243761-011-08501.04 ppm
2014-03-033761-006-08155.20 ppm
2014-03-033761-011-08300.565 ppm
2014-03-113761-006-08055.87 ppm
2014-03-113761-011-08300.655 ppm
2014-03-173761-006-08406.33 ppm
2014-03-173761-011-10150.745 ppm
2014-03-243761-006-08306.10 ppm
2014-03-243761-011-08501.15 ppm
2014-03-313761-006-08505.65 ppm
2014-03-313761-011-09250.678 ppm
2014-04-073761-006-08256.78 ppm
2014-04-073761-011-09201.31 ppm
2014-04-143761-006-09456.78 ppm
2014-04-143761-011-09250.678 ppm
2014-04-213761-006-07505.87 ppm
2014-04-213761-011-08550.678 ppm
2014-04-283761-006-08407.00 ppm
2014-04-283761-011-09500.745 ppm
2014-05-053761-006-10006.78 ppm
2014-05-053761-011-09150.723 ppm
2014-05-123761-006-08206.55 ppm
2014-05-123761-011-09200.813 ppm
2014-05-193761-006-10457.00 ppm
2014-05-193761-011-10201.13 ppm
2014-05-273761-006-09256.55 ppm
2014-05-273761-011-09350.881 ppm
2014-06-023761-006-08456.78 ppm
2014-06-023761-011-09450.904 ppm
2014-06-093761-006-08257.00 ppm
2014-06-093761-011-08450.881 ppm
2014-06-163761-006-08457.00 ppm
2014-06-163761-011-11251.81 ppm
2014-06-233761-006-08407.00 ppm
2014-06-233761-011-09051.04 ppm
2014-06-303761-006-08156.78 ppm
2014-06-303761-011-08300.971 ppm
2014-07-073761-006-08307.00 ppm
2014-07-073761-011-08400.994 ppm
2014-07-143761-006-08306.78 ppm
2014-07-143761-011-08450.926 ppm
2014-07-213761-006-08256.78 ppm
2014-07-213761-011-10001.08 ppm
2014-07-283761-006-08157.00 ppm
2014-07-283761-011-09100.971 ppm
2014-08-043761-006-08367.00 ppm
2014-08-043761-011-08550.881 ppm
2014-08-113761-006-08357.00 ppm
2014-08-113761-011-09101.04 ppm
2014-08-193761-006-11156.78 ppm
2014-08-193761-011-11000.926 ppm
2014-08-253761-011-09200.994 ppm
2014-09-023761-006-08307.00 ppm
2014-09-023761-011-08500.994 ppm
2014-09-093761-006-08156.78 ppm
2014-09-093761-011-08500.926 ppm
2014-09-163761-006-07356.55 ppm
2014-09-163761-011-07500.926 ppm
2014-09-223761-006-09256.78 ppm
2014-09-223761-011-10250.949 ppm
2014-09-293761-006-07406.55 ppm
2014-09-293761-011-08150.858 ppm
2014-10-063761-006-08256.78 ppm
2014-10-063761-011-08420.971 ppm
2014-10-133761-006-08257.00 ppm
2014-10-133761-011-08350.949 ppm
2014-10-203761-006-10157.00 ppm
2014-10-203761-011-08450.881 ppm
2014-10-273761-006-11006.55 ppm
2014-10-273761-011-09450.858 ppm
2014-11-173761-006-09354.97 ppm
2014-11-173761-011-10550.745 ppm
2014-11-243761-006-08156.78 ppm
2014-11-243761-011-08350.836 ppm
2014-12-013761-006-09256.55 ppm
2014-12-013761-011-09400.791 ppm
2014-12-083761-006-08406.55 ppm
2014-12-083761-011-09000.858 ppm
2014-12-153761-006-09206.55 ppm
2014-12-153761-011-09400.949 ppm
2014-12-223761-006-08056.33 ppm
2014-12-223761-011-09200.926 ppm
2014-12-293761-006-08304.74 ppm
2014-12-293761-011-08450.836 ppm
2015-01-053761-006-08406.33 ppm
2015-01-053761-011-08570.881 ppm
2015-01-123761-006-08356.33 ppm
2015-01-123761-011-09000.858 ppm
2015-01-193761-006-08356.33 ppm
2015-01-193761-011-08550.858 ppm
2015-01-263761-006-08406.33 ppm
2015-01-263761-011-09000.858 ppm
2015-02-023761-006-08356.33 ppm
2015-02-023761-011-09201.24 ppm
2015-02-093761-006-08356.33 ppm
2015-02-093761-011-09006.10 ppm
2015-02-173761-006-09106.33 ppm
2015-02-173761-011-09250.858 ppm
2015-02-243761-006-08306.33 ppm
2015-02-243761-011-08500.926 ppm
2015-03-023761-006-08306.33 ppm
2015-03-023761-011-08450.926 ppm
2015-03-093761-006-08306.10 ppm
2015-03-093761-011-08450.904 ppm
2015-03-173761-006-08206.55 ppm
2015-03-173761-011-09356.33 ppm
2015-03-233761-006-08556.33 ppm
2015-03-233761-011-09200.858 ppm
2015-03-303761-006-08456.33 ppm
2015-03-303761-011-09050.858 ppm
2015-04-063761-006-08356.10 ppm
2015-04-063761-011-09000.881 ppm
2015-04-133761-006-08456.10 ppm
2015-04-133761-011-08551.02 ppm
2015-04-203761-006-09356.33 ppm
2015-04-203761-011-10400.971 ppm
2015-04-273761-006-08456.33 ppm
2015-04-273761-011-10500.949 ppm
2015-05-043761-006-08356.33 ppm
2015-05-043761-011-08451.02 ppm
2015-05-113761-006-08306.33 ppm
2015-05-113761-011-09001.04 ppm
2015-05-183761-006-08356.33 ppm
2015-05-183761-011-09500.881 ppm
2015-05-263761-006-08306.10 ppm
2015-05-263761-011-09150.904 ppm
2015-06-013761-006-08406.10 ppm
2015-06-013761-011-09000.858 ppm
2015-06-083761-006-08156.10 ppm
2015-06-083761-011-08200.858 ppm
2015-06-153761-006-08256.33 ppm
2015-06-153761-011-08450.881 ppm
2015-06-233761-006-08007.45 ppm
2015-06-233761-011-09101.24 ppm
2015-06-293761-006-08506.78 ppm
2015-06-293761-011-09001.06 ppm
2015-07-073761-006-08256.55 ppm
2015-07-073761-011-08400.971 ppm
2015-07-133761-006-08156.78 ppm
2015-07-133761-011-08400.768 ppm
2015-07-203761-006-08206.78 ppm
2015-07-203761-011-09300.474 ppm
2015-07-273761-006-08406.78 ppm
2015-07-273761-011-09000.587 ppm
2015-08-033761-006-08406.78 ppm
2015-08-033761-011-09250.745 ppm
2015-08-103761-006-08256.78 ppm
2015-08-103761-011-08400.610 ppm
2015-08-173761-006-08306.78 ppm
2015-08-173761-011-08500.678 ppm
2015-08-243761-006-08506.55 ppm
2015-08-243761-011-09500.791 ppm
2015-08-313761-006-08457.00 ppm
2015-08-313761-011-09051.15 ppm
2015-09-083761-006-08506.78 ppm
2015-09-083761-011-09450.926 ppm
2015-09-143761-006-08155.42 ppm
2015-09-143761-011-08250.745 ppm
2015-09-233761-006-08155.42 ppm
2015-09-233761-011-08500.791 ppm
2015-09-283761-006-08505.65 ppm
2015-09-283761-011-10150.723 ppm
2015-10-053761-006-08355.20 ppm
2015-10-053761-011-08550.723 ppm
2015-10-123761-006-08355.42 ppm
2015-10-123761-011-09050.768 ppm
2015-10-193761-006-09357.00 ppm
2015-10-193761-011-09450.836 ppm
2015-10-263761-006-08256.78 ppm
2015-10-263761-011-08450.858 ppm
2015-11-023761-006-08356.78 ppm
2015-11-023761-011-09050.836 ppm
2015-11-093761-006-08106.33 ppm
2015-11-093761-011-08400.836 ppm
2015-11-163761-006-08455.87 ppm
2015-11-163761-011-10150.791 ppm
2015-11-233761-006-08255.42 ppm
2015-11-233761-011-08400.768 ppm
2015-11-303761-006-08555.40 ppm
2015-11-303761-006-08555.42 ppm
2015-11-303761-011-09050.730 ppm
2015-11-303761-011-09050.745 ppm
2015-12-073761-006-09005.50 ppm
2015-12-073761-006-09005.42 ppm
2015-12-073761-011-09150.810 ppm
2015-12-073761-011-09150.813 ppm
2015-12-143761-006-08055.50 ppm
2015-12-143761-006-08055.42 ppm
2015-12-143761-011-09200.800 ppm
2015-12-143761-011-09200.813 ppm
2015-12-213761-006-09355.50 ppm
2015-12-213761-006-09355.42 ppm
2015-12-213761-011-08400.820 ppm
2015-12-213761-011-08400.813 ppm
2015-12-283761-006-08205.40 ppm
2015-12-283761-011-08400.780 ppm
2016-01-043761-006-08005.10 ppm
2016-01-043761-011-08201.000 ppm
2016-01-113761-006-08205.50 ppm
2016-01-113761-011-08300.840 ppm
2016-01-183761-006-09255.40 ppm
2016-01-183761-011-09000.930 ppm
2016-01-253761-006-08405.60 ppm
2016-01-253761-011-09000.840 ppm
2016-02-013761-006-08305.50 ppm
2016-02-013761-011-08500.840 ppm
2016-02-083761-006-08146.80 ppm
2016-02-083761-011-08290.820 ppm
2016-02-163761-006-08355.60 ppm
2016-02-163761-011-08550.800 ppm
2016-02-223761-006-08165.60 ppm
2016-02-223761-011-09081.20 ppm
2016-02-293761-006-09005.50 ppm
2016-02-293761-011-09400.760 ppm
2016-03-073761-006-08455.50 ppm
2016-03-073761-011-09050.870 ppm
2016-03-143761-006-08355.70 ppm
2016-03-143761-011-08500.850 ppm
2016-03-213761-006-08405.10 ppm
2016-03-213761-011-09400.750 ppm
2016-03-283761-006-09304.60 ppm
2016-03-283761-011-08500.800 ppm
2016-04-053761-006-08254.70 ppm
2016-04-053761-011-08500.850 ppm
2016-04-113761-006-08255.00 ppm
2016-04-113761-011-08550.840 ppm
2016-04-183761-006-08305.60 ppm
2016-04-183761-011-09500.840 ppm
2016-04-263761-006-08115.60 ppm
2016-04-263761-011-08190.790 ppm
2016-05-023761-006-08157.50 ppm
2016-05-023761-011-08300.920 ppm
2016-05-093761-006-08305.60 ppm
2016-05-093761-011-08450.850 ppm
2016-05-173761-006-08205.50 ppm
2016-05-173761-011-08350.850 ppm
2016-05-233761-006-08355.70 ppm
2016-05-233761-011-09500.770 ppm
2016-05-313761-006-08405.50 ppm
2016-05-313761-011-09000.810 ppm
2016-06-063761-006-08305.90 ppm
2016-06-063761-011-10000.850 ppm
2016-06-133761-006-08255.40 ppm
2016-06-133761-011-08450.770 ppm
2016-06-203761-006-08505.90 ppm
2016-06-203761-011-11000.840 ppm
2016-06-273761-006-08505.60 ppm
2016-06-273761-011-09100.820 ppm
2016-07-053761-006-08255.40 ppm
2016-07-053761-011-08400.760 ppm
2016-07-113761-006-08405.50 ppm
2016-07-113761-011-09150.830 ppm
2016-07-183761-006-08205.60 ppm
2016-07-183761-011-09200.800 ppm
2016-07-253761-006-08205.70 ppm
2016-07-253761-011-08400.850 ppm
2016-08-013761-006-08355.50 ppm
2016-08-013761-011-08550.830 ppm
2016-08-083761-006-09455.60 ppm
2016-08-083761-011-09250.830 ppm
2016-08-153761-006-08305.40 ppm
2016-08-153761-011-11000.800 ppm
2016-08-223761-006-09505.60 ppm
2016-08-223761-011-11000.810 ppm
2016-08-293761-006-08355.50 ppm
2016-08-293761-011-08500.830 ppm
2016-09-063761-006-08305.70 ppm
2016-09-063761-011-08550.780 ppm
2016-09-123761-006-08405.80 ppm
2016-09-123761-011-09000.870 ppm
2016-09-193761-006-08555.70 ppm
2016-09-193761-011-10250.820 ppm
2016-09-263761-006-09555.70 ppm
2016-09-263761-011-08250.890 ppm
2016-10-033761-006-10155.70 ppm
2016-10-033761-011-09200.850 ppm
2016-10-103761-006-08205.70 ppm
2016-10-103761-011-08400.860 ppm
2016-10-173761-006-08505.50 ppm
2016-10-173761-011-09000.860 ppm
2016-10-253761-006-08155.50 ppm
2016-10-253761-011-08400.810 ppm
2016-10-313761-006-10255.50 ppm
2016-10-313761-011-11050.820 ppm
2016-11-073761-006-08405.40 ppm
2016-11-073761-011-08550.810 ppm
2016-11-143761-006-08105.60 ppm
2016-11-143761-011-09000.830 ppm
2016-11-213761-006-08505.50 ppm
2016-11-213761-011-10100.810 ppm
2016-11-283761-006-08455.40 ppm
2016-11-283761-011-09151.000 ppm
2016-12-053761-006-08305.20 ppm
2016-12-053761-011-09051.000 ppm
2016-12-123761-006-08105.50 ppm
2016-12-123761-011-08451.000 ppm
2016-12-193761-006-08305.50 ppm
2016-12-193761-011-08550.920 ppm
2016-12-273761-006-09455.50 ppm
2016-12-273761-011-09350.990 ppm
2017-01-043761-006-08354.90 ppm
2017-01-043761-011-09000.560 ppm
2017-01-093761-006-08455.40 ppm
2017-01-093761-011-09000.790 ppm
2017-01-163761-006-08455.60 ppm
2017-01-163761-011-09550.840 ppm
2017-01-243761-006-08255.70 ppm
2017-01-243761-011-09500.900 ppm
2017-01-303761-006-07306.50 ppm
2017-01-303761-011-08100.920 ppm
2017-02-073761-006-08405.90 ppm
2017-02-073761-011-09050.930 ppm
2017-02-133761-006-08455.70 ppm
2017-02-133761-011-09200.880 ppm
2017-02-213761-006-09255.80 ppm
2017-02-213761-011-11000.820 ppm
2017-02-273761-006-08455.60 ppm
2017-02-273761-011-09100.860 ppm
2017-03-063761-006-08455.90 ppm
2017-03-063761-011-09050.750 ppm
2017-03-143761-006-09005.90 ppm
2017-03-143761-011-09150.820 ppm
2017-03-203761-006-09255.70 ppm
2017-03-203761-011-09450.830 ppm
2017-03-273761-006-09506.00 ppm
2017-03-273761-011-10451.10 ppm
2017-04-033761-006-08406.30 ppm
2017-04-033761-011-09400.450 ppm
2017-04-103761-006-08506.40 ppm
2017-04-103761-011-09250.830 ppm
2017-04-173761-006-09556.80 ppm
2017-04-173761-011-10150.850 ppm
2017-04-243761-006-08456.60 ppm
2017-04-243761-011-11050.750 ppm
2017-05-013761-006-09056.70 ppm
2017-05-013761-011-09300.800 ppm
2017-05-093761-006-08556.70 ppm
2017-05-093761-011-09100.830 ppm
2017-05-153761-006-08456.70 ppm
2017-05-153761-011-09000.940 ppm
2017-05-233761-006-08206.70 ppm
2017-05-233761-011-09100.930 ppm
2017-05-303761-006-08256.80 ppm
2017-05-303761-011-09000.940 ppm
2017-06-053761-006-08406.10 ppm
2017-06-053761-011-09000.790 ppm
2017-06-123761-006-08256.90 ppm
2017-06-123761-011-08550.900 ppm
2017-06-193761-006-08406.10 ppm
2017-06-193761-011-09100.700 ppm
2017-06-263761-006-08556.60 ppm
2017-06-263761-011-09150.760 ppm
2017-07-053761-006-08356.70 ppm
2017-07-053761-011-08400.930 ppm
2017-07-103761-006-08455.60 ppm
2017-07-103761-011-09000.730 ppm
2017-07-173761-006-08406.10 ppm
2017-07-173761-011-09401.20 ppm
2017-07-243761-006-08255.80 ppm
2017-07-243761-011-08350.760 ppm
2017-07-313761-006-08204.40 ppm
2017-07-313761-011-09100.780 ppm
2017-08-073761-006-08355.40 ppm
2017-08-073761-011-08500.820 ppm
2017-08-143761-006-08305.30 ppm
2017-08-143761-011-08451.10 ppm
2017-08-213761-006-08155.90 ppm
2017-08-213761-011-08251.000 ppm
2017-08-283761-006-08556.50 ppm
2017-08-283761-011-09051.000 ppm
2017-09-053761-006-08456.00 ppm
2017-09-053761-011-09150.890 ppm
2017-09-113761-006-08355.70 ppm
2017-09-113761-011-08450.510 ppm
2017-09-183761-006-08306.00 ppm
2017-09-183761-011-09000.650 ppm
2017-09-253761-006-08105.80 ppm
2017-09-253761-011-08200.730 ppm
2017-10-023761-006-08405.20 ppm
2017-10-023761-011-09000.770 ppm
2017-10-093761-006-08155.70 ppm
2017-10-093761-011-08250.770 ppm
2017-10-163761-006-09006.10 ppm
2017-10-163761-011-09200.800 ppm
2017-10-233761-006-08155.70 ppm
2017-10-233761-011-08350.780 ppm
2017-10-313761-006-08153.70 ppm
2017-10-313761-011-08250.760 ppm
2017-11-063761-006-08105.10 ppm
2017-11-063761-011-08250.740 ppm
2017-11-133761-006-08405.80 ppm
2017-11-133761-011-09500.820 ppm
2017-11-203761-006-08155.10 ppm
2017-11-203761-011-09300.800 ppm
2017-11-283761-006-08155.60 ppm
2017-11-283761-011-08250.810 ppm
2017-12-043761-006-09255.40 ppm
2017-12-043761-011-09450.850 ppm
2017-12-113761-006-09005.50 ppm
2017-12-113761-011-09100.990 ppm
2017-12-183761-006-08306.70 ppm
2017-12-183761-011-09350.930 ppm
2017-12-283761-006-08356.70 ppm
2017-12-283761-011-09050.860 ppm
2018-01-023761-006-08406.70 ppm
2018-01-023761-011-08450.840 ppm
2018-01-083761-006-08406.30 ppm
2018-01-083761-011-08550.850 ppm
2018-01-153761-006-08356.80 ppm
2018-01-153761-011-09401.10 ppm
2018-01-223761-006-08306.60 ppm
2018-01-223761-011-08400.890 ppm
2018-01-293761-006-08206.00 ppm
2018-01-293761-011-08350.820 ppm
2018-02-063761-006-08105.00 ppm
2018-02-063761-011-08250.800 ppm
2018-02-123761-006-08405.70 ppm
2018-02-123761-011-08500.840 ppm
2018-02-203761-006-08404.10 ppm
2018-02-203761-011-09101.10 ppm
2018-02-263761-006-08255.30 ppm
2018-02-263761-011-08350.760 ppm
2018-03-053761-006-08254.70 ppm
2018-03-053761-011-08350.800 ppm
2018-03-123761-006-08354.30 ppm
2018-03-123761-011-09050.820 ppm
2018-03-193761-006-08305.80 ppm
2018-03-193761-011-09200.790 ppm
2018-03-263761-006-08351.10 ppm
2018-03-263761-011-08450.750 ppm
2018-04-023761-006-08300.720 ppm
2018-04-023761-011-08550.720 ppm
2018-04-093761-006-08100.740 ppm
2018-04-093761-011-08300.740 ppm
2018-04-163761-006-08250.780 ppm
2018-04-163761-011-08450.780 ppm
2018-04-233761-006-08210.770 ppm
2018-04-233761-011-08360.770 ppm
2018-04-303761-006-08400.760 ppm
2018-04-303761-011-08450.760 ppm
2018-05-073761-006-08200.810 ppm
2018-05-073761-011-08300.820 ppm
2018-05-143761-006-08550.720 ppm
2018-05-143761-011-09050.710 ppm
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2018-09-043761-006-08450.720 ppm
2018-09-043761-011-08550.720 ppm
2018-09-103761-006-08230.690 ppm
2018-09-103761-011-08450.690 ppm
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2018-09-173761-011-09300.760 ppm
2018-09-243761-006-09100.780 ppm
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2018-10-013761-011-10300.750 ppm
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2018-10-083761-011-09250.740 ppm
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2018-10-293761-006-09150.790 ppm
2018-10-293761-011-09300.790 ppm
2018-11-053761-006-08200.780 ppm
2018-11-053761-011-08000.780 ppm
2018-11-133761-006-08500.770 ppm
2018-11-133761-011-10100.770 ppm
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2018-11-193761-011-08360.780 ppm
2018-11-263761-006-08400.770 ppm
2018-11-263761-011-08550.770 ppm
2018-12-033761-006-08400.780 ppm
2018-12-033761-011-09000.780 ppm
2018-12-103761-006-08300.760 ppm
2018-12-103761-011-08500.770 ppm
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2018-12-173761-011-08250.790 ppm
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2018-12-313761-006-08350.720 ppm
2018-12-313761-011-08450.730 ppm
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2019-01-283761-011-08400.770 ppm
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2019-02-113761-006-08300.790 ppm
2019-02-113761-011-09000.780 ppm
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2019-05-203761-011-08500.750 ppm
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2019-07-293761-011-08590.690 ppm
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2019-08-263761-011-08300.690 ppm
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2019-09-303761-011-08450.680 ppm
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2019-10-143761-011-09100.680 ppm
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2019-10-213761-011-08400.710 ppm
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