Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Nitrate and nitrite

City of Glendale

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

MORE ABOUT THIS CONTAMINANT

 

115

Samples

0

Samples exceeding legal limit (MCL)

97

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20143.67 ppm4638ND - 8.01 ppm
20153.65 ppm1412ND - 8.08 ppm
20163.39 ppm1412ND - 8.60 ppm
20172.58 ppm1211ND - 7.20 ppm
20183.69 ppm1513ND - 8.24 ppm
20193.17 ppm1411ND - 8.05 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL) 10 ppm

ppm = parts per million

All test results

Date Lab ID Result
2014-01-02201401020046I6.00 ppm
2014-01-061401060900PPFND
2014-01-061401061121OSF4.55 ppm
2014-01-161401161005CB14.04 ppm
2014-01-161401161225A221.66 ppm
2014-03-271403271025CZ1FC1.34 ppm
2014-04-071404071025CB1FC4.11 ppm
2014-04-071404071118OSFC6.25 ppm
2014-04-071404071303PPFCND
2014-05-151405150920W304.93 ppm
2014-05-151405150920W30FC4.93 ppm
2014-05-151405151035W43FC5.13 ppm
2014-05-151405151035W43I5.13 ppm
2014-05-191405190835A22FC1.85 ppm
2014-05-211405211140W275.49 ppm
2014-05-211405211140W27FC5.49 ppm
2014-05-211405211210W164.53 ppm
2014-05-211405211210W16FC4.53 ppm
2014-05-211405211250CZ1ND
2014-05-211405211250CZ1FCND
2014-05-221405221040W22FC8.01 ppm
2014-05-271405271200CHB1.99 ppm
2014-05-271405271200CHBFC1.99 ppm
2014-07-101407100919A22FC1.76 ppm
2014-07-101407100959W22FC5.87 ppm
2014-07-101407101015W30FC4.90 ppm
2014-07-101407101035W43FC4.34 ppm
2014-07-101407101124CB1FC4.09 ppm
2014-07-141407141045OSFC4.35 ppm
2014-07-141407141136CZ1FCND
2014-07-141407141235PPFCND
2014-07-181407181055W186.20 ppm
2014-07-181407181055W18FC6.20 ppm
2014-08-111408111323W27FC5.09 ppm
2014-08-11140811340W16FC4.39 ppm
2014-10-031410031040W18FC5.40 ppm
2014-10-061410060922PPFCND
2014-10-061410061010CB1FC4.10 ppm
2014-10-0614100610390SFC3.75 ppm
2014-10-061410061140CZ1FCND
2014-10-071410071140W43FC5.64 ppm
2014-10-091410091320W22FC5.81 ppm
2014-10-141410141000W30FC4.97 ppm
2014-10-151410150950CHBFC2.49 ppm
2014-10-151410151045W16FC2.84 ppm
2014-10-151410151125W27FC4.53 ppm
2015-03-031503031005OSFC4.66 ppm
2015-04-061504061040OSF2.99 ppm
2015-04-061504061200CZ1ND
2015-04-061504061325PPFND
2015-04-271504271140W43FC5.84 ppm
2015-04-291504291015W22FC6.58 ppm
2015-04-291504291100W30FC5.92 ppm
2015-05-071505070930A22FC1.87 ppm
2015-05-211505211045CHBFC1.57 ppm
2015-05-211505211100W16FC1.59 ppm
2015-05-211505211315W27FC4.26 ppm
2015-07-061507060935OSFC4.89 ppm
2015-10-011510011038W18FC8.08 ppm
2015-10-051510051021OSFC2.78 ppm
2016-01-041601041012OSFC1.35 ppm
2016-04-181604180950W305.19 ppm
2016-04-181604181055W227.12 ppm
2016-04-191604190950W275.77 ppm
2016-04-191604191030A221.98 ppm
2016-04-211604210935CHB1.65 ppm
2016-04-211604211048W433.15 ppm
2016-04-251604250855PPFND
2016-04-251604250953OSF2.62 ppm
2016-04-251604251114CZ1ND
2016-04-271604271045W164.15 ppm
2016-04-291604290935W188.60 ppm
2016-06-091606091220CB13.69 ppm
2016-07-111607111050OSFC2.21 ppm
2017-04-03201704030392I0.340 ppm
2017-04-03201704030393I0.490 ppm
2017-04-03201704030394IND
2017-04-19201704190431I5.30 ppm
2017-04-19201704190432I0.330 ppm
2017-04-19201704190433I1.40 ppm
2017-04-19201704190434I5.90 ppm
2017-04-211504211030CB1FC3.95 ppm
2017-04-26201704260363I7.20 ppm
2017-04-26201704260364I0.500 ppm
2017-04-27201704270335I2.20 ppm
2017-05-16201705160653I3.40 ppm
2018-02-281802280941W306.21 ppm
2018-02-281802281018W274.07 ppm
2018-02-281802281235PPFND
2018-04-101804100946A222.06 ppm
2018-04-111804111024CZ1ND
2018-04-111804111048OSF1.75 ppm
2018-04-121804120932CHB1.77 ppm
2018-04-121804121100W161.50 ppm
2018-04-121804121158CB12.62 ppm
2018-04-121804121302W433.57 ppm
2018-04-241804240917W228.24 ppm
2018-08-171808171106W30FC7.03 ppm
2018-08-171808171228W27FC5.84 ppm
2018-10-151810151027W30FC6.28 ppm
2018-10-151810151126W27FC4.35 ppm
2019-01-161901160914W30F5.96 ppm
2019-01-161901161019W27F4.29 ppm
2019-04-151904150959OSFIND
2019-04-151904151118CZ1FIND
2019-04-151904151258PPFIND
2019-04-181904180915W30F5.81 ppm
2019-04-181904180955CHBFI1.97 ppm
2019-04-181904181120W16FI1.91 ppm
2019-04-181904181226CB1FI2.48 ppm
2019-04-181904181345A22R2.15 ppm
2019-04-191904190841W27F4.30 ppm
2019-05-021905020914W43F3.32 ppm
2019-08-2304070934.18 ppm
2019-08-231908187-018.05 ppm