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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Newhall Water Supply

Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Nitrite is significantly more toxic than nitrate. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer.

MORE ABOUT THIS CONTAMINANT

 

103

Samples

1

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.151 ppm176ND - 0.870 ppm
20150.0594 ppm164ND - 0.310 ppm
20160.206 ppm1511ND - 1.09 ppm
20170.0800 ppm166ND - 0.340 ppm
20180.0504 ppm1615ND - 0.170 ppm
20190.0477 ppm2319ND - 0.110 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 1 ppm

The legal limit for nitrite, established in 1991, was based on the rate of conversion of ingested nitrate into nitrite in adults. This limit may not fully protect against the risk of cancer due to nitrite exposure.

ppm = parts per million

All test results

Date Lab ID Result
2014-01-212028000ND
2014-01-2120280010.120 ppm
2014-02-112031945ND
2014-02-112031946ND
2014-03-112037446ND
2014-04-152043930ND
2014-04-152043931ND
2014-05-132049260ND
2014-06-1020546290.870 ppm
2014-07-082060076ND
2014-07-082060077ND
2014-08-1220682000.200 ppm
2014-09-092075360ND
2014-10-2120854450.570 ppm
2014-10-212085446ND
2014-11-1820906600.610 ppm
2014-12-1620991830.190 ppm
2015-01-132A50229-02ND
2015-01-132A50229-03ND
2015-02-102B50241-020.150 ppm
2015-03-102C50225-02ND
2015-04-211D51531-010.310 ppm
2015-04-221D51531-02ND
2015-05-121E50905-01ND
2015-06-162F50474-02ND
2015-07-142G50416-03ND
2015-07-142G50416-020.250 ppm
2015-08-112H50313-02ND
2015-09-082I50219-020.240 ppm
2015-10-132J50356-03ND
2015-10-132J50356-02ND
2015-11-102K50344-01ND
2015-12-082L50272-02ND
2016-01-122A60281-03ND
2016-01-122A60281-020.250 ppm
2016-02-092B60246-02ND
2016-03-152C60334-020.140 ppm
2016-04-122D60343-020.110 ppm
2016-04-122D60343-03ND
2016-06-152F60433-020.220 ppm
2016-07-192G60546-020.660 ppm
2016-08-162H60483-030.140 ppm
2016-08-162H60483-021.09 ppm
2016-09-132I60335-020.1000 ppm
2016-10-172J60522-03ND
2016-10-172J60522-020.1000 ppm
2016-11-152K60472-020.130 ppm
2016-12-132L60297-020.150 ppm
2017-01-182A70397-03ND
2017-01-182A70397-02ND
2017-02-132B70269-02ND
2017-03-212C70415-02ND
2017-04-182D70524-03ND
2017-04-182D70524-020.210 ppm
2017-05-162E70486-020.210 ppm
2017-06-202F70503-020.130 ppm
2017-07-182G70469-02ND
2017-08-072H70226-03ND
2017-08-072H70226-020.340 ppm
2017-09-182I70432-02ND
2017-10-172J70553-03ND
2017-10-172J70553-020.110 ppm
2017-11-202K70515-02ND
2017-12-182L70391-020.280 ppm
2018-01-242A80535-020.0164 ppm
2018-01-242A80535-030.00496 ppm
2018-02-122B80213-020.0121 ppm
2018-03-202C80412-020.0483 ppm
2018-04-112D80373-020.0226 ppm
2018-04-112D80373-030.0164 ppm
2018-05-152E80463-020.0683 ppm
2018-06-192F80547-020.0862 ppm
2018-07-172G80445-02ND
2018-07-172G80445-030.0695 ppm
2018-08-142H80376-020.170 ppm
2018-09-182I80512-020.0663 ppm
2018-10-152J80500-020.0237 ppm
2018-10-152J80500-030.0240 ppm
2018-11-122K80230-020.130 ppm
2018-12-042L80072-020.0469 ppm
2019-01-082A90201-020.0415 ppm
2019-01-082A90201-030.0132 ppm
2019-02-252B90393-020.0415 ppm
2019-03-122C90260-020.110 ppm
2019-03-182C90307-010.1000 ppm
2019-04-222D90694-020.0431 ppm
2019-04-222D90694-030.0428 ppm
2019-05-222E90570-020.1000 ppm
2019-05-222E90570-030.110 ppm
2019-06-042F90104-020.0848 ppm
2019-06-042F90104-030.00497 ppm
2019-07-172G90532-020.0485 ppm
2019-07-172G90532-030.0215 ppm
2019-08-202H90486-020.0872 ppm
2019-08-202H90486-030.0452 ppm
2019-09-172I90510-020.0556 ppm
2019-09-172I90510-030.0569 ppm
2019-10-082J90342-020.0697 ppm
2019-10-082J90342-030.0200 ppm
2019-11-192K90429-02ND
2019-11-192K90429-03ND
2019-12-172L90490-02ND
2019-12-172L90490-03ND