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EWG's Tap Water Database — 2019 UPDATE

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Nitrate

Pennsylvania American Water Pittsburgh

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.

 

72

Samples

0

Samples exceeding legal limit (MCL)

72

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.751 ppm14140.480 ppm - 0.880 ppm
20130.645 ppm220.530 ppm - 0.760 ppm
20140.779 ppm14140.550 ppm - 1.19 ppm
20150.681 ppm14140.420 ppm - 0.990 ppm
20160.779 ppm14140.530 ppm - 1.11 ppm
20170.796 ppm14140.540 ppm - 1.12 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
2012-08-07178946010.880 ppm
2012-08-14182047010.480 ppm
2012-09-11178952010.580 ppm
2012-09-11178948010.690 ppm
2012-09-11178938010.660 ppm
2012-09-11178934010.820 ppm
2012-09-11178941010.850 ppm
2012-09-11178956010.830 ppm
2012-11-07198873010.780 ppm
2012-11-07198872010.750 ppm
2012-11-07198863010.730 ppm
2012-11-07198864010.830 ppm
2012-11-07198876010.790 ppm
2012-11-07198865010.840 ppm
2013-08-06230836010.760 ppm
2013-08-26230849010.530 ppm
2014-07-16261253010.940 ppm
2014-07-16261266010.960 ppm
2014-07-16261251010.590 ppm
2014-07-16261249010.550 ppm
2014-07-16261265010.570 ppm
2014-07-16261263010.590 ppm
2014-08-06265281010.570 ppm
2014-08-20270224010.900 ppm
2014-10-07271118011.17 ppm
2014-10-07271124010.740 ppm
2014-10-07271114010.730 ppm
2014-10-07271125011.19 ppm
2014-10-07271115010.650 ppm
2014-10-22275929010.760 ppm
2015-07-07130750360.500 ppm
2015-07-07130750280.490 ppm
2015-07-07130750380.660 ppm
2015-07-07130750320.710 ppm
2015-07-07130750340.600 ppm
2015-07-07130750300.470 ppm
2015-08-05131982110.420 ppm
2015-08-10131981740.720 ppm
2015-10-14134507490.860 ppm
2015-10-14134507530.510 ppm
2015-10-14134507470.720 ppm
2015-10-14134507550.950 ppm
2015-10-14134507450.990 ppm
2015-10-14134507510.930 ppm
2016-07-20146530790.530 ppm
2016-07-20146530770.590 ppm
2016-07-20146530730.600 ppm
2016-07-20146530750.690 ppm
2016-07-20146530810.720 ppm
2016-07-20146530710.630 ppm
2016-08-02148216510.880 ppm
2016-08-03148216490.590 ppm
2016-10-18151529291.11 ppm
2016-10-18151529370.640 ppm
2016-10-18151529391.000 ppm
2016-10-18151529351.05 ppm
2016-10-18151529331.01 ppm
2016-10-18151529310.870 ppm
2017-07-20164897820.690 ppm
2017-07-20164898170.560 ppm
2017-07-20164898150.670 ppm
2017-07-20164897840.610 ppm
2017-07-20164897860.830 ppm
2017-07-20164898190.840 ppm
2017-08-02166461880.540 ppm
2017-08-08166461850.760 ppm
2017-10-17169535671.12 ppm
2017-10-17169535711.12 ppm
2017-10-17169535690.980 ppm
2017-10-17169535650.750 ppm
2017-10-17169535730.700 ppm
2017-10-17169535750.970 ppm