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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Redlands City

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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52

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
2014ND70ND
2015ND60ND
2016N/A00N/A
2017ND190ND
2018ND10ND
2019ND190ND

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
2014-01-169590-072-0840ND
2014-01-169590-031-0820ND
2014-03-069590-031-0935ND
2014-07-039590-029-0920ND
2014-07-039590-053-1020ND
2014-10-029590-008-1000ND
2014-10-029590-060-0840ND
2015-03-129590-010-1140ND
2015-03-129590-025-1015ND
2015-03-129590-022-1040ND
2015-03-129590-019-1010ND
2015-05-219590-026-1120ND
2015-09-149590-012-1105ND
2017-03-232993-019-0855ND
2017-03-232993-008-0925ND
2017-03-232993-010-1115ND
2017-03-232993-009-1030ND
2017-04-202993-017-0845ND
2017-04-202993-070-0855ND
2017-04-202993-021-1040ND
2017-04-202993-069-0810ND
2017-04-202993-055-1230ND
2017-04-202993-054-1035ND
2017-04-202993-029-0930ND
2017-05-032993-062-1020ND
2017-05-242993-003-1100ND
2017-05-242993-022-0940ND
2017-05-242993-025-1000ND
2017-06-155810-031-0930ND
2017-08-312993-005-0850ND
2017-08-312993-060-1050ND
2017-12-082993-002-1000ND
2018-04-192993-026-0900ND
2019-06-204790-035-0930ND
2019-06-274790-069-0945ND
2019-06-274790-003-0845ND
2019-06-274790-070-1325ND
2019-08-194790-062-0950ND
2019-08-194790-008-1100ND
2019-08-214790-021-1140ND
2019-08-224790-019-1050ND
2019-08-274790-060-1230ND
2019-08-274790-055-0800ND
2019-08-274790-053-1350ND
2019-08-284790-017-1330ND
2019-08-294790-029-0945ND
2019-09-104790-010-0930ND
2019-09-174790-031-0930ND
2019-09-194790-025-0915ND
2019-09-194790-026-1020ND
2019-09-304790-022-0910ND
2019-09-304790-012-1320ND