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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

California American Water Company - Suburban

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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123

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND250ND
2016N/A00N/A
2017ND330ND
2018ND510ND
2019ND130ND

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
2014-06-171225-018-1150ND
2015-07-081225-004-0850ND
2015-07-081225-006-0950ND
2015-07-081225-008-0910ND
2015-07-081225-010-1110ND
2015-07-081225-013-1100ND
2015-07-081225-016-1030ND
2015-07-081225-019-0940ND
2015-07-081225-020-1205ND
2015-07-081225-021-1030ND
2015-07-091225-001-0945ND
2015-07-091225-017-1045ND
2015-07-141225-011-1030ND
2015-07-151225-007-0920ND
2015-07-151225-052-1025ND
2015-07-201225-014-0920ND
2015-07-201225-049-1210ND
2015-07-221225-044-0845ND
2015-07-221225-051-1110ND
2015-07-271225-018-1005ND
2015-07-271225-053-1220ND
2015-07-281225-048-0900ND
2015-07-301225-015-1035ND
2015-08-261225-005-0930ND
2015-08-271225-047-0750ND
2015-12-081225-062-1130ND
2017-06-161233-007-1245ND
2017-09-195810-010-1420ND
2017-09-195810-064-1520ND
2017-09-195810-066-1520ND
2017-09-265810-010-1328ND
2017-09-265810-064-1343ND
2017-09-265810-066-1348ND
2017-10-035810-010-0730ND
2017-10-035810-064-0745ND
2017-10-035810-066-0750ND
2017-10-105810-010-1442ND
2017-10-105810-064-1500ND
2017-10-105810-066-1505ND
2017-10-175810-010-1342ND
2017-10-245810-010-1350ND
2017-10-245810-064-1405ND
2017-10-245810-066-1410ND
2017-10-315810-010-1228ND
2017-10-315810-064-1243ND
2017-10-315810-066-1248ND
2017-11-075810-010-0915ND
2017-11-075810-064-0930ND
2017-11-075810-066-0935ND
2017-11-145810-010-1226ND
2017-11-145810-064-1241ND
2017-11-145810-066-1246ND
2017-11-215810-010-1118ND
2017-11-215810-064-1133ND
2017-11-215810-066-1138ND
2017-11-285810-010-1337ND
2017-11-285810-064-1352ND
2017-11-285810-066-1357ND
2017-12-061225-014-1140ND
2018-02-205810-010-1030ND
2018-02-205810-063-1045ND
2018-02-205810-064-1050ND
2018-02-205810-065-1055ND
2018-02-205810-066-1100ND
2018-03-125810-010-0936ND
2018-03-125810-063-0950ND
2018-03-125810-064-0955ND
2018-03-125810-065-1000ND
2018-03-125810-066-1005ND
2018-05-015810-010-1145ND
2018-05-015810-063-1200ND
2018-05-015810-064-1205ND
2018-05-015810-065-1210ND
2018-05-015810-066-1215ND
2018-08-061233-005-0810ND
2018-08-061233-014-1055ND
2018-08-061233-018-0915ND
2018-08-061233-020-1240ND
2018-08-061233-051-1230ND
2018-08-081233-007-0945ND
2018-08-081233-011-1305ND
2018-08-081233-044-1110ND
2018-08-081233-047-1230ND
2018-08-091233-004-0905ND
2018-08-091233-006-1300ND
2018-08-091233-016-0815ND
2018-08-091233-049-1100ND
2018-08-091233-052-1250ND
2018-08-131233-001-0850ND
2018-08-131233-010-1140ND
2018-08-131233-013-1015ND
2018-08-131233-017-0900ND
2018-08-131233-019-1015ND
2018-08-131233-021-1020ND
2018-08-145810-010-1415ND
2018-08-141233-012-1130ND
2018-08-141233-053-0905ND
2018-08-141233-062-0840ND
2018-08-145810-063-1425ND
2018-08-145810-064-1430ND
2018-08-145810-065-1435ND
2018-08-145810-066-1440ND
2018-09-111233-009-0845ND
2018-10-171233-008-1030ND
2018-10-171233-023-1115ND
2018-11-065810-010-1030ND
2018-11-065810-063-1035ND
2018-11-065810-064-1040ND
2018-11-065810-065-1045ND
2018-11-065810-066-1050ND
2019-02-125810-010-1100ND
2019-02-125810-063-1105ND
2019-02-125810-064-1110ND
2019-02-125810-065-1115ND
2019-02-125810-066-1120ND
2019-05-142435-010-0940ND
2019-08-121225-015-1215ND
2019-08-121225-050-1445ND
2019-11-041225-010-1222ND
2019-11-041225-063-1237ND
2019-11-041225-064-1247ND
2019-11-041225-065-1304ND
2019-11-041225-066-1320ND