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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

East Lyme Water & Sewer Commission

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

 

256

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND60ND
2016ND90ND
20170.0300 ppm81ND - 0.240 ppm
20180.000405 ppm741ND - 0.0300 ppm
20190.00109 ppm1476ND - 0.0500 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
2014-11-1496187CHND
2014-11-1496188CHND
2014-11-1496189CHND
2014-11-1496190CHND
2014-11-1496191CHND
2014-11-1496192CHND
2014-12-1196601CHND
2014-12-1196602CHND
2014-12-1196603CHND
2014-12-1196604CHND
2014-12-1196605CHND
2014-12-1196606CHND
2015-10-15101620CHND
2015-10-15101621CHND
2015-10-15101622CHND
2015-10-15101623CHND
2015-10-15101624CHND
2015-10-15101625CHND
2016-02-10103491CHND
2016-02-10103492CHND
2016-02-10103493CHND
2016-02-10103494CHND
2016-02-10103495CHND
2016-02-10103496CHND
2016-08-02106406GEND
2016-08-02106407GEND
2016-08-02106408GEND
2017-01-19109314GEND
2017-01-19109315GEND
2017-05-09111179GEND
2017-05-09111180GE0.240 ppm
2017-05-09111181GEND
2017-09-14113547GEND
2017-09-14113548GEND
2017-09-14113549GEND
2018-02-12115996GEND
2018-02-12115997GEND
2018-02-12115998GEND
2018-02-12115999GEND
2018-02-12116000GEND
2018-02-12116001GEND
2018-09-13CB30532ND
2018-09-13CB30533ND
2018-09-13CB30534ND
2018-09-13CB30535ND
2018-09-13CB30536ND
2018-09-13CB30537ND
2018-09-13CB30538ND
2018-09-13CB30539ND
2018-09-24CB37210ND
2018-09-24CB37211ND
2018-09-24CB37212ND
2018-09-24CB37213ND
2018-09-24CB37214ND
2018-09-24CB37215ND
2018-09-24CB37216ND
2018-09-24CB37217ND
2018-09-24CB37218ND
2018-10-10CB68932ND
2018-10-10CB68933ND
2018-10-10CB68934ND
2018-10-10CB68935ND
2018-10-10CB68936ND
2018-10-10CB68937ND
2018-10-10CB68938ND
2018-10-10CB68939ND
2018-10-30CB84625ND
2018-10-30CB84626ND
2018-10-30CB84627ND
2018-10-30CB84628ND
2018-10-30CB84629ND
2018-10-30CB84630ND
2018-10-30CB84631ND
2018-10-30CB84632ND
2018-11-08CB90712ND
2018-11-08CB90713ND
2018-11-08CB90714ND
2018-11-08CB90715ND
2018-11-08CB90716ND
2018-11-08CB90717ND
2018-11-08CB90718ND
2018-11-08CB90719ND
2018-11-28CC03994ND
2018-11-28CC03995ND
2018-11-28CC03996ND
2018-11-28CC03997ND
2018-11-28CC03998ND
2018-11-28CC03999ND
2018-11-28CC04000ND
2018-11-28CC04001ND
2018-11-28CC04002ND
2018-12-05CC07654ND
2018-12-05CC07655ND
2018-12-05CC07656ND
2018-12-05CC07657ND
2018-12-05CC07658ND
2018-12-05CC07659ND
2018-12-05CC07660ND
2018-12-05CC07661ND
2018-12-05CC07662ND
2018-12-181219000.0300 ppm
2018-12-19CC17059ND
2018-12-19CC17060ND
2018-12-19CC17061ND
2018-12-19CC17062ND
2018-12-19CC17063ND
2018-12-19CC17064ND
2018-12-19CC17065ND
2018-12-19CC17066ND
2019-01-14CC28221ND
2019-01-14CC28222ND
2019-01-14CC28223ND
2019-01-14CC28224ND
2019-01-14CC28225ND
2019-01-14CC28226ND
2019-01-14CC28227ND
2019-01-14CC28228ND
2019-01-14CC28229ND
2019-01-24CC33680ND
2019-01-24CC33681ND
2019-01-24CC33682ND
2019-01-24CC33683ND
2019-01-24CC33684ND
2019-01-24CC33685ND
2019-01-24CC33686ND
2019-01-24CC33687ND
2019-02-14CC51802ND
2019-02-14CC51803ND
2019-02-14CC51804ND
2019-02-14CC51805ND
2019-02-14CC51806ND
2019-02-14CC51807ND
2019-02-14CC51808ND
2019-02-14CC51809ND
2019-02-14CC51810ND
2019-02-27CC58577ND
2019-02-27CC58578ND
2019-02-27CC58579ND
2019-02-27CC58580ND
2019-02-27CC58581ND
2019-02-27CC58582ND
2019-02-27CC58583ND
2019-02-27CC58584ND
2019-03-13CC66808ND
2019-03-13CC66809ND
2019-03-13CC66810ND
2019-03-13CC66811ND
2019-03-13CC66812ND
2019-03-13CC66813ND
2019-03-13CC66814ND
2019-03-13CC66815ND
2019-03-27CC75825ND
2019-03-27CC75826ND
2019-03-27CC75827ND
2019-03-27CC75828ND
2019-03-27CC75829ND
2019-03-27CC75830ND
2019-03-27CC75831ND
2019-03-27CC75832ND
2019-03-27CC75833ND
2019-04-08CC90295ND
2019-04-08CC90296ND
2019-04-08CC90297ND
2019-04-08CC90298ND
2019-04-08CC90299ND
2019-04-08CC90300ND
2019-04-08CC90301ND
2019-04-08CC90302ND
2019-04-08CC90303ND
2019-04-25CD01330ND
2019-04-25CD01331ND
2019-04-25CD01332ND
2019-04-25CD01333ND
2019-04-25CD01334ND
2019-04-25CD01335ND
2019-04-25CD01336ND
2019-04-25CD01337ND
2019-05-13CD11460ND
2019-05-13CD11461ND
2019-05-13CD11462ND
2019-05-13CD11463ND
2019-05-13CD11464ND
2019-05-13CD11465ND
2019-05-13CD11466ND
2019-05-13CD11467ND
2019-05-13CD11468ND
2019-05-30CD23250ND
2019-05-30CD23251ND
2019-05-30CD23252ND
2019-05-30CD23253ND
2019-05-30CD23254ND
2019-05-30CD23255ND
2019-05-30CD23256ND
2019-05-30CD23257ND
2019-05-30CD23258ND
2019-06-13CD33710ND
2019-06-13CD33711ND
2019-06-13CD33712ND
2019-06-13CD33713ND
2019-06-13CD33714ND
2019-06-13CD33715ND
2019-06-13CD33716ND
2019-06-13CD33717ND
2019-06-26CD42346ND
2019-06-26CD42347ND
2019-06-26CD42348ND
2019-06-26CD42349ND
2019-06-26CD42350ND
2019-06-26CD42351ND
2019-06-26CD42352ND
2019-07-11CD54682ND
2019-07-11CD54683ND
2019-07-11CD54684ND
2019-07-11CD54685ND
2019-07-11CD54686ND
2019-07-11CD54687ND
2019-07-11CD54688ND
2019-07-24CD63751ND
2019-07-24CD63743ND
2019-07-24CD63744ND
2019-07-24CD63745ND
2019-07-24CD63746ND
2019-07-24CD63747ND
2019-07-24CD63748ND
2019-07-24CD63749ND
2019-08-07CD79747ND
2019-08-07CD79748ND
2019-08-07CD79749ND
2019-08-07CD79750ND
2019-08-07CD79751ND
2019-08-07CD79752ND
2019-08-07CD79753ND
2019-08-07CD79754ND
2019-08-27CD92884ND
2019-08-27CD92885ND
2019-08-27CD92886ND
2019-08-27CD92887ND
2019-08-27CD92888ND
2019-08-27CD92889ND
2019-08-27CD92890ND
2019-08-28CD93750ND
2019-08-28CD93751ND
2019-09-101273860.0400 ppm
2019-09-101273870.0500 ppm
2019-09-101273880.0200 ppm
2019-09-11CE06376ND
2019-09-11CE06377ND
2019-09-11CE06378ND
2019-09-11CE06379ND
2019-09-11CE06380ND
2019-09-11CE06381ND
2019-09-11CE06382ND
2019-09-11CE06384ND
2019-12-091292890.0300 ppm
2019-12-091292900.01000 ppm
2019-12-231295670.01000 ppm