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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Wellman Municipal Waterworks

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

 

119

Samples

2

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.263 ppm2413ND - 1.27 ppm
20150.00556 ppm271ND - 0.150 ppm
2016ND110ND
20170.0108 ppm131ND - 0.140 ppm
2018ND320ND
2019ND120ND

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
2014-01-0920274160.230 ppm
2014-01-0920274170.180 ppm
2014-02-0420331100.220 ppm
2014-02-0420331110.240 ppm
2014-03-0420376900.160 ppm
2014-03-0420376930.1000 ppm
2014-04-0320444020.480 ppm
2014-04-0320444030.440 ppm
2014-05-052049402ND
2014-05-052049403ND
2014-06-0220537960.710 ppm
2014-06-0220537970.740 ppm
2014-07-0120603501.27 ppm
2014-07-0120603521.24 ppm
2014-08-052068401ND
2014-08-052068402ND
2014-09-032076839ND
2014-09-032076841ND
2014-10-062083852ND
2014-10-0620838660.300 ppm
2014-11-032091246ND
2014-11-032091259ND
2014-12-012093886ND
2014-12-012093887ND
2015-01-051A50117-01ND
2015-01-051A50089-03ND
2015-02-021B50031-01ND
2015-02-021B50033-03ND
2015-03-021C50054-03ND
2015-03-021C50056-01ND
2015-04-061D50352-03ND
2015-05-041E50126-03ND
2015-05-111E50665-01ND
2015-06-011F50074-03ND
2015-06-011F50074-04ND
2015-07-061G50307-04ND
2015-07-061G50307-03ND
2015-08-041H50161-04ND
2015-08-041H50161-03ND
2015-09-011I50101-03ND
2015-09-011I50101-040.150 ppm
2015-10-051J50260-04ND
2015-10-051J50260-03ND
2015-11-021K50086-04ND
2015-11-021K50086-03ND
2015-11-161K51071-04ND
2015-11-161K51071-03ND
2015-12-071L50546-04ND
2015-12-071L50546-03ND
2015-12-211L51576-04ND
2015-12-211L51576-03ND
2016-01-041A60055-03ND
2016-01-121A60707-01ND
2016-04-191D61529-03ND
2016-05-171E61312-01ND
2016-06-071F60535-03ND
2016-07-061G60287-03ND
2016-08-021H60161-03ND
2016-09-131I60840-03ND
2016-10-041J60214-03ND
2016-11-021K60270-03ND
2016-12-211L61434-03ND
2017-01-251A71528-03ND
2017-02-081B70576-03ND
2017-03-021C70247-030.140 ppm
2017-04-121D70952-03ND
2017-05-251E72089-03ND
2017-06-211F71618-03ND
2017-07-201G71568-03ND
2017-08-171H71519-03ND
2017-09-281I72017-03ND
2017-10-191J71599-03ND
2017-11-011K70152-03ND
2017-12-041L70206-03ND
2017-12-041L70206-04ND
2018-01-031A80157-01ND
2018-01-031A80157-02ND
2018-01-031A80166-03ND
2018-01-031A80166-04ND
2018-02-061B80353-03ND
2018-02-061B80353-04ND
2018-03-061C80428-03ND
2018-03-061C80428-04ND
2018-04-101D80744-03ND
2018-04-101D80765-01ND
2018-04-101D80765-02ND
2018-04-171D81354-01ND
2018-05-011E80100-03ND
2018-05-011E80100-04ND
2018-06-051F80432-03ND
2018-06-051F80432-04ND
2018-07-101G80736-01ND
2018-07-101G80736-02ND
2018-07-101G80822-03ND
2018-07-101G80822-04ND
2018-08-071H80667-03ND
2018-08-071H80667-04ND
2018-09-041I80133-03ND
2018-09-041I80133-04ND
2018-09-181I81382-01ND
2018-09-181I81382-02ND
2018-10-021J80272-03ND
2018-10-021J80272-04ND
2018-11-011K80177-03ND
2018-11-011K80177-04ND
2018-12-041L80198-03ND
2018-12-041L80198-04ND
2019-01-081A90588-03ND
2019-01-081A90588-04ND
2019-01-081A90623-01ND
2019-01-081A90623-02ND
2019-02-061B90469-03ND
2019-02-061B90469-04ND
2019-04-09OE792567ND
2019-04-09OE792569ND
2019-07-09OE832408ND
2019-07-16OE836099ND
2019-10-16OE880206ND
2019-10-16OE880207ND