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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

City of Surprise - Mountain Vista

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND150ND
2016ND170ND
2017ND160ND
2018ND160ND
2019ND160ND

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
2014-01-224011817-04IND
2014-01-224011817-03IND
2014-01-224011817-02IND
2014-01-224011817-01IND
2014-04-224041931-01IND
2014-04-224041930-01IND
2014-04-224041929-01ND
2014-04-224041927-01IND
2014-07-304072658-01ND
2014-07-304072656-01ND
2014-07-304072665-01ND
2014-07-304072667-01ND
2014-10-284102394-01ND
2014-10-284102393-01ND
2014-10-284102387-01IND
2014-10-294102474-01IND
2015-01-215011694-04IND
2015-01-215011694-03IND
2015-01-215011694-02IND
2015-01-215011694-01IND
2015-04-215041904-01ND
2015-04-215041905-01ND
2015-04-215041907-01ND
2015-04-215041906-01ND
2015-07-285072565-01IND
2015-07-285072564-01IND
2015-07-29507268-01ND
2015-07-295072676-01IND
2015-10-125101379-01IND
2015-10-125101373-01IND
2015-10-125101369-01IND
2016-01-256012035-02TTND
2016-01-256012035-01TTND
2016-01-256012035-03IND
2016-01-256012035-03TTND
2016-01-256012035-04TTND
2016-04-266042227-01IND
2016-04-266042226-01IND
2016-04-266042223-01IND
2016-04-266042222-01IND
2016-07-266072329-01ND
2016-07-266072325-01ND
2016-07-266072323-01ND
2016-07-266072321-01IND
2016-10-246102131-01IND
2016-10-246102137-01ND
2016-10-246102135-01ND
2016-10-246102133-01IND
2017-01-307012591-04CND
2017-01-307012591-03CND
2017-01-307012591-02CND
2017-01-307012591-01ND
2017-04-207041996-01IOCND
2017-04-207041995-01IOCND
2017-04-207041987-01IOCND
2017-04-247042213-01IOCND
2017-07-197071804-01IOCND
2017-07-197071802-01IOCND
2017-07-197071805-01IOCND
2017-07-197071806-01IOCND
2017-10-117101207-04 IOCND
2017-10-117101207-03 IOCND
2017-10-117101207-02 IOCND
2017-10-117101207-01 IOCND
2018-01-0818A0734-04ND
2018-01-0818A0734-03ND
2018-01-0818A0734-02ND
2018-01-0818A0734-01ND
2018-04-0918D0971-01 IOCND
2018-04-0918D0971-02 IOCND
2018-04-0918D0971-04ND
2018-04-0918D0971-03 IOCND
2018-07-0918G0785-04 IOCND
2018-07-0918G0785-03 IOCND
2018-07-0918G0785-02 IOCND
2018-07-0918G0785-01 IOCND
2018-10-0818J0826-04ND
2018-10-0818J0826-03ND
2018-10-0818J0826-02ND
2018-10-0818J0826-01ND
2019-01-2319A2463-02ND
2019-01-2319A2463-01ND
2019-01-2319A2463-03ND
2019-01-2319A2463-04ND
2019-04-2919D3107-04ND
2019-04-2919D3107-03ND
2019-04-2919D3107-02ND
2019-04-2919D3107-01ND
2019-07-1019G1241-04ND
2019-07-1019G1241-03ND
2019-07-1019G1241-02ND
2019-07-1019G1241-01ND
2019-10-0919J1279-01ND
2019-10-0919J1279-04ND
2019-10-0919J1279-03ND
2019-10-0919J1279-02ND