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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

City of Phoenix

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

 

180

Samples

0

Samples exceeding legal limit (MCL)

160

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20142.50 ppm3029ND - 7.60 ppm
20152.39 ppm2523ND - 8.00 ppm
20162.65 ppm2927ND - 8.40 ppm
20172.79 ppm3128ND - 9.00 ppm
20181.81 ppm3330ND - 4.70 ppm
20191.48 ppm3230ND - 4.70 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
2014-01-0620130811814.60 ppm
2014-01-0720130813730.500 ppm
2014-01-0720130813780.900 ppm
2014-01-0820130813823.10 ppm
2014-01-1420140009132.10 ppm
2014-01-1420140009416.80 ppm
2014-01-1520140011200.400 ppm
2014-01-1520140015362.60 ppm
2014-01-1620140011341.20 ppm
2014-01-1620140014061.80 ppm
2014-01-2120140031810.400 ppm
2014-01-2120140031950.800 ppm
2014-01-2220140032141.50 ppm
2014-01-2320140032190.800 ppm
2014-01-2320140032250.800 ppm
2014-02-054020356-010.300 ppm
2014-02-1820140095110.900 ppm
2014-02-2620140096911.40 ppm
2014-04-0120140185703.60 ppm
2014-04-0420140210127.10 ppm
2014-04-1420140218254.50 ppm
2014-04-1520140220400.200 ppm
2014-07-0220140406293.80 ppm
2014-07-0820140436127.60 ppm
2014-07-1520140432214.60 ppm
2014-07-1620140434300.1000 ppm
2014-07-232014045323ND
2014-10-0820140643014.70 ppm
2014-10-1420140644237.40 ppm
2014-11-0720140727630.600 ppm
2015-01-0620140835561.60 ppm
2015-01-0620140835601.80 ppm
2015-01-0720140841924.50 ppm
2015-01-0720140841981.60 ppm
2015-01-07201501070258I0.280 ppm
2015-01-1320140839722.40 ppm
2015-01-1320140839767.10 ppm
2015-01-1420140839923.00 ppm
2015-01-1420140840790.800 ppm
2015-01-1520140841510.500 ppm
2015-01-1520140841610.900 ppm
2015-01-2120150018710.900 ppm
2015-01-2720150021801.70 ppm
2015-01-2820150021891.40 ppm
2015-02-0320150019010.400 ppm
2015-02-1020150073610.700 ppm
2015-04-0820150208274.60 ppm
2015-04-0920150208380.300 ppm
2015-07-0720150426078.00 ppm
2015-07-092015042637ND
2015-07-0920150426400.1000 ppm
2015-07-092015042642ND
2015-07-1520150454914.70 ppm
2015-10-0620150653137.90 ppm
2015-10-2120150688604.50 ppm
2016-01-0520150866467.20 ppm
2016-01-0520150866870.500 ppm
2016-01-06201601060265I0.310 ppm
2016-01-1220160014480.800 ppm
2016-01-1220160014630.800 ppm
2016-01-1320160016651.80 ppm
2016-01-1320160016871.40 ppm
2016-01-1420160017533.00 ppm
2016-01-1420160017630.600 ppm
2016-01-1920160025264.60 ppm
2016-01-2020160027350.900 ppm
2016-01-2120160027631.70 ppm
2016-02-0920160025400.900 ppm
2016-02-1720160096290.800 ppm
2016-02-1720160096651.80 ppm
2016-02-1820160096382.40 ppm
2016-04-0720160200300.1000 ppm
2016-04-1320160218158.10 ppm
2016-04-2720160255264.40 ppm
2016-05-1720160302621.50 ppm
2016-07-0520160418358.40 ppm
2016-07-072016042302ND
2016-07-072016042361ND
2016-07-0720160423640.200 ppm
2016-08-17550-68248-24.70 ppm
2016-08-18550-68335-34.00 ppm
2016-10-0520160649867.20 ppm
2016-10-1220160668454.00 ppm
2016-10-1220160668874.60 ppm
2017-01-0420160868592.70 ppm
2017-01-0420160868920.200 ppm
2017-01-0420160872357.10 ppm
2017-01-04201701040662I0.340 ppm
2017-01-1020170016924.90 ppm
2017-01-1020170017084.70 ppm
2017-01-1120170018533.20 ppm
2017-01-1120170018550.500 ppm
2017-01-1720170024010.900 ppm
2017-01-1720170024030.800 ppm
2017-01-1820170024221.80 ppm
2017-01-1820170024350.800 ppm
2017-01-2520170043481.50 ppm
2017-01-2520170043501.70 ppm
2017-02-0120170065480.900 ppm
2017-02-0820170087510.900 ppm
2017-04-062017024513ND
2017-04-2020170294038.00 ppm
2017-04-2620170326554.70 ppm
2017-04-2620170326564.70 ppm
2017-04-2720170317271.80 ppm
2017-04-2720170317400.500 ppm
2017-07-1120170524989.00 ppm
2017-07-1220170525164.60 ppm
2017-07-1220170525304.70 ppm
2017-07-132017053197ND
2017-07-132017053209ND
2017-07-1320170532210.1000 ppm
2017-10-0920170775157.10 ppm
2017-10-1820170793444.60 ppm
2017-10-1820170793493.90 ppm
2018-01-0220180001720.1000 ppm
2018-01-0320180002631.20 ppm
2018-01-03201801030337I0.310 ppm
2018-01-0420170978874.70 ppm
2018-01-0420170978944.10 ppm
2018-01-0920180008432.80 ppm
2018-01-1020180012670.500 ppm
2018-01-1020180012751.000 ppm
2018-01-1620180029110.600 ppm
2018-01-1620180029173.30 ppm
2018-01-1720180029710.800 ppm
2018-01-1820180029841.70 ppm
2018-01-1820180029901.50 ppm
2018-01-1820180042090.800 ppm
2018-01-2420180038261.90 ppm
2018-01-2420180038340.800 ppm
2018-04-052018021566ND
2018-04-1020180231403.10 ppm
2018-04-1220180232314.70 ppm
2018-04-1220180232363.70 ppm
2018-04-2620180259960.800 ppm
2018-05-0920180309950.300 ppm
2018-07-122018045562ND
2018-07-1220180455640.1000 ppm
2018-07-122018045566ND
2018-07-1720180483584.50 ppm
2018-07-1720180483764.10 ppm
2018-07-1920180483981.60 ppm
2018-07-2520180506931.10 ppm
2018-10-1120180700984.60 ppm
2018-10-1120180701033.70 ppm
2018-10-2520180738030.800 ppm
2018-10-3020180749560.500 ppm
2019-01-0220180891401.40 ppm
2019-01-0220180891481.40 ppm
2019-01-02201901020376I0.260 ppm
2019-01-0320180896500.300 ppm
2019-01-0820190005544.60 ppm
2019-01-0820190005604.70 ppm
2019-01-0920190005683.40 ppm
2019-01-0920190005730.400 ppm
2019-01-1520190023540.300 ppm
2019-01-1620190023701.000 ppm
2019-01-1620190023840.800 ppm
2019-01-1720190020861.80 ppm
2019-01-1720190020901.70 ppm
2019-01-2320190045110.800 ppm
2019-01-2320190045160.500 ppm
2019-01-2420190048430.700 ppm
2019-01-2920190058290.400 ppm
2019-02-0720190064530.500 ppm
2019-04-1720190281300.400 ppm
2019-04-1820190281352.50 ppm
2019-04-2920190311890.1000 ppm
2019-07-1120190483000.200 ppm
2019-07-112019048791ND
2019-07-112019048803ND
2019-07-1620190506250.800 ppm
2019-07-3020190539413.30 ppm
2019-07-3020190539603.90 ppm
2019-10-0220190722384.00 ppm
2019-10-0220190722483.00 ppm
2019-10-0920190754950.900 ppm
2019-12-1020190919542.30 ppm
2019-12-1220190921770.900 ppm