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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

City of Toledo

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.

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68

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND130ND
20150.000833 ppm121ND - 0.01000 ppm
2016ND100ND
2017ND120ND
2018ND110ND
2019ND100ND

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
2014-01-13AG62611ND
2014-02-07AG64197ND
2014-03-11AG66122ND
2014-04-15AG68464ND
2014-05-05AG69699ND
2014-06-06AG72411ND
2014-07-11AG75239ND
2014-08-07AG77191ND
2014-08-13AG77749ND
2014-09-11AG80337ND
2014-10-10AG82653ND
2014-11-07AG84589ND
2014-12-04AG86615ND
2015-01-08AG88720ND
2015-02-11AG90580ND
2015-03-11AG92275ND
2015-04-07AG93869ND
2015-05-06AG95792ND
2015-06-08AG98331ND
2015-07-17AH01355ND
2015-08-11AH03227ND
2015-09-02AH04890ND
2015-10-06AH07173ND
2015-11-03AH09111ND
2015-12-03AH112650.01000 ppm
2016-03-02AH16387ND
2016-04-06AH18747ND
2016-05-10AH21187ND
2016-06-02AH22857ND
2016-07-07AH25390ND
2016-08-02AH27184ND
2016-09-07AH30034ND
2016-10-05AH32695ND
2016-11-10AH35679ND
2016-12-07AH37551ND
2017-01-11AH40259ND
2017-02-15AH43226ND
2017-03-08AH44605ND
2017-04-18AH47539ND
2017-05-09AH49319ND
2017-06-06AH51195ND
2017-07-06AH53866ND
2017-08-08AH56771ND
2017-09-06AH58970ND
2017-10-12AH62167ND
2017-11-09AH63979ND
2017-12-06AH65779ND
2018-01-05AH67585ND
2018-02-09AH69757ND
2018-03-08AH71557ND
2018-04-05AH73505ND
2018-06-05AH77466ND
2018-07-05AH79934ND
2018-08-06AH82323ND
2018-09-11AH85057ND
2018-10-02AH86992ND
2018-11-06AH89466ND
2018-12-18AH92423ND
2019-01-16AH94249ND
2019-02-14AH95969ND
2019-03-11AH97569ND
2019-04-04AH99325ND
2019-05-16AI02415ND
2019-06-06AI03821ND
2019-07-11AI06544ND
2019-08-08AI08628ND
2019-09-11AI11386ND
2019-10-03AI13009ND