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EWG's Tap Water Database — 2019 UPDATE

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Nitrate

Philadelphia 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.

 

225

Samples

0

Samples exceeding legal limit (MCL)

225

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20122.36 ppm36360.720 ppm - 3.83 ppm
20132.31 ppm36360.714 ppm - 4.19 ppm
20142.36 ppm39390.850 ppm - 4.41 ppm
20152.30 ppm39390.830 ppm - 4.30 ppm
20162.57 ppm36360.943 ppm - 4.62 ppm
20172.54 ppm39390.710 ppm - 4.15 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
2012-01-10DW120110-0031.24 ppm
2012-01-10DW120110-0013.62 ppm
2012-01-10DW120110-0003.83 ppm
2012-02-07DW120207-0031.13 ppm
2012-02-07DW120207-0013.20 ppm
2012-02-07DW120207-0003.34 ppm
2012-03-06DW120306-0031.23 ppm
2012-03-06DW120306-0012.51 ppm
2012-03-06DW120306-0002.72 ppm
2012-04-03DW120403-0031.16 ppm
2012-04-03DW120403-0013.48 ppm
2012-04-03DW120403-0003.63 ppm
2012-05-08DW120508-0030.910 ppm
2012-05-08DW120508-0012.67 ppm
2012-05-08DW120508-0002.82 ppm
2012-06-05DW120605-0030.850 ppm
2012-06-05DW120605-0011.68 ppm
2012-06-05DW120605-0001.81 ppm
2012-07-10DW120710-0031.23 ppm
2012-07-10DW120710-0013.17 ppm
2012-07-10DW120710-0003.14 ppm
2012-08-07DW120807-0031.19 ppm
2012-08-07DW120807-0012.76 ppm
2012-08-07DW120807-0092.85 ppm
2012-09-04DW120904-0031.14 ppm
2012-09-04DW120904-0013.02 ppm
2012-09-04DW120904-0003.12 ppm
2012-10-02DW121002-0030.860 ppm
2012-10-02DW121002-0013.36 ppm
2012-10-02DW121002-0003.29 ppm
2012-11-06DW121106-0030.720 ppm
2012-11-06DW121106-0012.51 ppm
2012-11-06DW121106-0002.42 ppm
2012-12-04DW121204-0030.950 ppm
2012-12-04DW121204-0013.58 ppm
2012-12-04DW121204-0003.76 ppm
2013-01-08DW130108-0031.01 ppm
2013-01-08DW130108-0013.01 ppm
2013-01-08DW130108-0003.35 ppm
2013-02-05DW130205-0030.850 ppm
2013-02-05DW130205-0012.50 ppm
2013-02-05DW130205-0002.56 ppm
2013-03-05DW130305-0031.17 ppm
2013-03-05DW130305-0022.88 ppm
2013-03-05DW130305-0013.01 ppm
2013-04-09DW130409-0030.844 ppm
2013-04-09DW130409-0022.63 ppm
2013-04-09DW130409-0012.79 ppm
2013-05-07DW130507-0030.811 ppm
2013-05-07DW130507-0022.71 ppm
2013-05-07DW130507-0012.69 ppm
2013-06-04DW130604-0030.858 ppm
2013-06-04DW130604-0022.88 ppm
2013-06-04DW130604-0013.15 ppm
2013-07-09DW130709-0030.714 ppm
2013-07-09DW130709-0022.43 ppm
2013-07-09DW130709-0012.64 ppm
2013-08-06DW130806-0030.964 ppm
2013-08-06DW130806-0022.63 ppm
2013-08-06DW130806-0012.01 ppm
2013-09-10DW130910-0031.14 ppm
2013-09-10DW130910-0022.98 ppm
2013-09-10DW130910-0012.97 ppm
2013-10-08DW131008-0031.41 ppm
2013-10-08DW131008-0024.02 ppm
2013-10-08DW131008-0014.19 ppm
2013-11-05DW131105-0031.57 ppm
2013-11-05DW131105-0024.06 ppm
2013-11-05DW131105-0013.30 ppm
2013-12-03DW131203-0031.19 ppm
2013-12-03DW131203-0022.61 ppm
2013-12-03DW131203-0012.60 ppm
2014-01-07DW140107-0031.03 ppm
2014-01-07DW140107-0023.55 ppm
2014-01-07DW140107-0013.44 ppm
2014-02-04DW140204-0031.29 ppm
2014-02-04DW140204-0024.16 ppm
2014-02-04DW140204-0014.41 ppm
2014-02-2673755421.30 ppm
2014-02-2673755442.40 ppm
2014-02-2673755431.90 ppm
2014-03-0473814231.40 ppm
2014-03-0473814203.30 ppm
2014-03-0473814223.30 ppm
2014-04-0874228850.930 ppm
2014-04-0874228842.50 ppm
2014-04-0874228832.20 ppm
2014-05-0674535261.000 ppm
2014-05-0674535272.60 ppm
2014-05-0674535282.20 ppm
2014-06-0374859090.950 ppm
2014-06-0374859082.50 ppm
2014-06-0374859072.40 ppm
2014-07-0875257420.960 ppm
2014-07-0875257412.50 ppm
2014-07-0875257402.40 ppm
2014-08-05DW140805-0400.850 ppm
2014-08-05DW140805-0213.01 ppm
2014-08-05DW140805-0132.74 ppm
2014-09-09DW140909-0401.25 ppm
2014-09-09DW140909-0213.39 ppm
2014-09-09DW140909-0133.43 ppm
2014-10-07DW141007-0401.65 ppm
2014-10-07DW141007-0213.80 ppm
2014-10-07DW141007-0133.91 ppm
2014-11-04DW141104-0401.24 ppm
2014-11-04DW141104-0213.42 ppm
2014-11-04DW141104-0133.18 ppm
2014-12-09DW141209-0401.23 ppm
2014-12-09DW141209-0212.31 ppm
2014-12-09DW141209-0132.17 ppm
2015-01-08122919702.47 ppm
2015-01-08122919721.10 ppm
2015-01-08122919713.08 ppm
2015-02-03124066071.38 ppm
2015-02-03124066063.76 ppm
2015-02-03124066053.86 ppm
2015-03-03125202661.55 ppm
2015-03-03125202654.08 ppm
2015-03-03125202644.30 ppm
2015-04-27126377920.900 ppm
2015-04-27126377942.39 ppm
2015-04-27126377931.62 ppm
2015-05-05127543220.880 ppm
2015-05-05127543212.31 ppm
2015-05-05127543201.61 ppm
2015-06-09128880621.21 ppm
2015-06-09128880632.81 ppm
2015-06-09128880642.76 ppm
2015-07-21130179330.830 ppm
2015-07-21130179312.30 ppm
2015-07-21130179292.20 ppm
2015-08-04131403302.90 ppm
2015-08-11131403330.880 ppm
2015-08-11131403323.09 ppm
2015-09-01132695131.02 ppm
2015-09-01132695153.36 ppm
2015-09-01132695172.30 ppm
2015-09-23132695141.20 ppm
2015-09-23132695163.40 ppm
2015-09-23132695183.16 ppm
2015-10-06133937001.45 ppm
2015-10-06133936992.33 ppm
2015-10-06133936982.96 ppm
2015-11-03135187111.33 ppm
2015-11-03135187102.51 ppm
2015-11-03135187093.15 ppm
2015-12-08136382231.10 ppm
2015-12-08136382222.77 ppm
2015-12-08136382213.25 ppm
2016-01-05137578591.07 ppm
2016-01-05137578583.07 ppm
2016-01-05137578572.77 ppm
2016-02-09138746781.20 ppm
2016-02-09138746773.15 ppm
2016-02-09138746762.75 ppm
2016-03-08139911121.05 ppm
2016-03-08139911113.14 ppm
2016-03-08139911102.96 ppm
2016-04-12141090221.01 ppm
2016-04-12141090212.60 ppm
2016-04-12141090203.27 ppm
2016-05-03142568610.943 ppm
2016-05-03142568603.28 ppm
2016-05-03142568593.43 ppm
2016-06-07144118891.10 ppm
2016-06-07144118883.03 ppm
2016-06-07144118872.69 ppm
2016-07-12145764951.23 ppm
2016-07-12145764942.33 ppm
2016-07-12145764933.46 ppm
2016-08-09147419601.18 ppm
2016-08-09147419592.94 ppm
2016-08-09147419582.82 ppm
2016-09-13149146171.12 ppm
2016-09-13149146164.29 ppm
2016-09-13149146154.38 ppm
2016-10-04150815411.44 ppm
2016-10-04150815403.05 ppm
2016-10-04150815393.78 ppm
2016-11-15152316961.47 ppm
2016-11-15152316954.54 ppm
2016-11-15152316944.62 ppm
2016-12-06153796691.36 ppm
2016-12-06153796682.71 ppm
2016-12-06153796673.20 ppm
2017-01-10155230431.61 ppm
2017-01-10155230424.15 ppm
2017-01-10155230413.57 ppm
2017-01-17155233961.33 ppm
2017-01-17155233973.26 ppm
2017-01-17155233983.85 ppm
2017-02-07156619041.17 ppm
2017-02-07156619033.90 ppm
2017-02-07156619023.96 ppm
2017-03-07158016230.781 ppm
2017-03-07158016223.13 ppm
2017-03-07158016213.56 ppm
2017-04-04159447210.733 ppm
2017-04-04159447202.48 ppm
2017-04-04159447192.40 ppm
2017-05-17161011420.710 ppm
2017-05-17161011442.01 ppm
2017-05-17161011432.61 ppm
2017-06-06162634401.10 ppm
2017-06-06162634392.99 ppm
2017-06-06162634383.06 ppm
2017-07-11164196901.17 ppm
2017-07-11164196892.73 ppm
2017-07-11164196883.19 ppm
2017-08-08165724371.06 ppm
2017-08-08165724362.78 ppm
2017-08-08165724352.89 ppm
2017-09-12167332561.22 ppm
2017-09-12167332553.08 ppm
2017-09-12167332543.25 ppm
2017-10-03168859051.40 ppm
2017-10-03168859044.09 ppm
2017-10-03168859034.07 ppm
2017-11-07170294120.850 ppm
2017-11-07170294113.13 ppm
2017-11-07170294103.02 ppm
2017-12-05171678501.54 ppm
2017-12-05171678493.26 ppm
2017-12-05171678483.92 ppm