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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Chino Basin Desalter Authority - Desalter 1

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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102

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND150ND
20150.0752 ppm236ND - 0.360 ppm
2016ND160ND
2017ND130ND
2018ND170ND
20190.0239 ppm181ND - 0.430 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
2014-01-214790-021-1400ND
2014-07-024790-001-0845ND
2014-07-024790-002-0745ND
2014-07-024790-004-0600ND
2014-07-094790-005-0645ND
2014-07-094790-006-0845ND
2014-07-094790-007-0915ND
2014-07-094790-008-0745ND
2014-07-164790-009-0600ND
2014-07-164790-010-0700ND
2014-07-164790-011-0800ND
2014-07-164790-013-0915ND
2014-07-234790-015-0600ND
2014-07-234790-020-0904ND
2014-08-134790-014-0900ND
2015-07-014790-001-0910ND
2015-07-014790-002-0830ND
2015-07-014790-004-1014ND
2015-07-084790-005-0730ND
2015-07-084790-008-0820ND
2015-07-084790-009-0915ND
2015-07-084790-010-1020ND
2015-07-084790-011-1123ND
2015-07-154790-020-0730ND
2015-07-154790-021-0650ND
2015-07-154790-021-0730ND
2015-07-224790-006-1120ND
2015-07-224790-007-1045ND
2015-07-224790-013-0945ND
2015-07-224790-014-0853ND
2015-08-111808-017-0833ND
2015-09-221808-021-12500.360 ppm
2015-09-231808-021-07500.320 ppm
2015-09-241808-021-06300.310 ppm
2015-09-251808-021-06300.0800 ppm
2015-09-271808-021-11100.330 ppm
2015-09-281808-021-06580.330 ppm
2015-11-101808-017-0750ND
2016-04-044790-015-0945ND
2016-05-101808-017-0720ND
2016-07-064790-005-0600ND
2016-07-064790-008-0650ND
2016-07-064790-009-0800ND
2016-07-064790-010-0910ND
2016-07-134790-006-0700ND
2016-07-134790-007-0630ND
2016-07-134790-021-0800ND
2016-07-204790-011-0700ND
2016-07-204790-013-0800ND
2016-07-204790-014-0900ND
2016-07-204790-020-1000ND
2016-07-274790-001-0700ND
2016-07-274790-002-0730ND
2016-07-274790-004-0845ND
2017-02-141808-017-0705ND
2017-07-124790-020-0600ND
2017-07-124790-023-0930ND
2017-07-124790-024-0630ND
2017-07-194790-011-0530ND
2017-07-194790-013-0630ND
2017-07-194790-014-0730ND
2017-07-194790-015-0830ND
2017-07-264790-006-0900ND
2017-07-264790-007-0930ND
2017-07-264790-021-0700ND
2017-08-024790-001-0700ND
2017-08-024790-004-0815ND
2018-07-124790-006-0930ND
2018-07-124790-007-1050ND
2018-07-124790-021-0700ND
2018-07-174790-005-0830ND
2018-07-174790-008-0715ND
2018-07-174790-009-1015ND
2018-07-174790-010-1100ND
2018-07-244790-011-0635ND
2018-07-244790-013-0720ND
2018-07-244790-014-0800ND
2018-07-244790-015-0900ND
2018-07-314790-001-0445ND
2018-07-314790-002-0530ND
2018-07-314790-004-0830ND
2018-08-074790-023-0945ND
2018-08-074790-024-1030ND
2018-08-144790-020-0730ND
2019-05-071808-018-0748ND
2019-07-104790-001-1015ND
2019-07-104790-002-0915ND
2019-07-104790-004-1100ND
2019-07-174790-005-0745ND
2019-07-174790-008-0830ND
2019-07-174790-009-09000.430 ppm
2019-07-174790-010-0800ND
2019-07-244790-013-0930ND
2019-07-244790-014-0900ND
2019-07-244790-015-1000ND
2019-07-314790-006-1000ND
2019-07-314790-007-0900ND
2019-07-314790-021-0945ND
2019-08-074790-023-0800ND
2019-08-074790-024-0730ND
2019-08-144790-020-0830ND
2019-08-194790-011-0900ND