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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Morro Bay PW Department - Water Division

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

 

250

Samples

1

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.0359 ppm392ND - 1.000 ppm
2015ND320ND
20160.0514 ppm352ND - 1.30 ppm
2017ND440ND
2018ND560ND
20190.0114 ppm441ND - 0.500 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
2014-01-075867-030-0838ND
2014-01-075867-031-0842ND
2014-01-075867-032-08491.000 ppm
2014-01-075867-036-0827ND
2014-02-045867-036-0841ND
2014-03-045867-036-0830ND
2014-04-015867-030-0944ND
2014-04-015867-031-0947ND
2014-04-015867-032-0959ND
2014-04-015867-036-0901ND
2014-05-065867-036-0845ND
2014-06-035867-036-0828ND
2014-07-015867-030-0918ND
2014-07-015867-031-0920ND
2014-07-015867-032-0930ND
2014-07-015867-036-0908ND
2014-08-055867-036-0830ND
2014-09-025867-036-0838ND
2014-10-075867-030-0851ND
2014-10-075867-031-0855ND
2014-10-075867-032-0836ND
2014-10-075867-036-0945ND
2014-11-045867-036-1026ND
2014-11-065867-005-09450.400 ppm
2014-11-065867-006-0946ND
2014-11-065867-016-1035ND
2014-11-065867-019-0947ND
2014-11-065867-020-0948ND
2014-11-065867-030-0955ND
2014-11-065867-031-1000ND
2014-11-065867-032-0937ND
2014-11-205867-005-0839ND
2014-11-205867-006-0845ND
2014-11-205867-019-0849ND
2014-11-205867-020-0852ND
2014-11-205867-030-0816ND
2014-11-205867-031-0821ND
2014-11-205867-032-0829ND
2014-12-025867-036-1014ND
2015-01-065867-030-0915ND
2015-01-065867-031-0920ND
2015-01-065867-032-0925ND
2015-01-065867-036-0840ND
2015-02-035867-036-0900ND
2015-03-035867-036-0923ND
2015-04-075867-030-0825ND
2015-04-075867-031-0830ND
2015-04-075867-032-0823ND
2015-04-075867-036-0942ND
2015-05-055867-005-0840ND
2015-05-055867-006-0845ND
2015-05-055867-016-1055ND
2015-05-055867-019-0910ND
2015-05-055867-020-0915ND
2015-05-055867-030-0745ND
2015-05-055867-031-0750ND
2015-05-055867-032-0830ND
2015-05-055867-036-0930ND
2015-06-025867-036-0818ND
2015-07-075867-030-0907ND
2015-07-075867-031-0911ND
2015-07-075867-032-0915ND
2015-07-075867-036-0946ND
2015-08-045867-036-0840ND
2015-09-015867-036-0827ND
2015-10-075867-030-0929ND
2015-10-075867-031-0931ND
2015-10-075867-032-1021ND
2015-10-075867-036-0919ND
2015-11-035867-036-0850ND
2015-12-015867-036-0835ND
2016-01-045867-030-0950ND
2016-01-045867-031-09541.30 ppm
2016-01-045867-032-1007ND
2016-01-045867-036-0903ND
2016-02-025867-030-0826ND
2016-02-025867-031-0830ND
2016-02-025867-032-0832ND
2016-02-025867-036-0905ND
2016-03-015867-036-0845ND
2016-04-055867-030-0924ND
2016-04-055867-031-09270.500 ppm
2016-04-055867-032-0936ND
2016-04-055867-036-0841ND
2016-05-035867-036-0933ND
2016-06-075867-036-0829ND
2016-07-055867-030-0935ND
2016-07-055867-031-0938ND
2016-07-055867-032-0944ND
2016-07-055867-036-0922ND
2016-08-025867-030-0856ND
2016-08-025867-031-0900ND
2016-08-025867-032-0907ND
2016-08-025867-036-0844ND
2016-10-045867-030-0941ND
2016-10-045867-031-0945ND
2016-10-045867-032-0950ND
2016-10-045867-036-0832ND
2016-11-015867-030-0743ND
2016-11-015867-031-0748ND
2016-11-015867-032-0752ND
2016-11-015867-036-0857ND
2016-12-065867-030-0905ND
2016-12-065867-031-0910ND
2016-12-065867-032-0920ND
2016-12-065867-036-0950ND
2017-01-035867-030-0931ND
2017-01-035867-032-0950ND
2017-01-035867-036-0845ND
2017-02-015867-030-0816ND
2017-02-015867-031-0822ND
2017-02-015867-032-0834ND
2017-02-015867-036-0802ND
2017-03-075867-030-0800ND
2017-03-075867-031-0804ND
2017-03-075867-032-0826ND
2017-03-075867-036-0909ND
2017-04-045867-030-0929ND
2017-04-045867-031-0932ND
2017-04-045867-032-0938ND
2017-04-045867-036-0834ND
2017-05-025867-030-0909ND
2017-05-025867-031-0912ND
2017-05-025867-032-0920ND
2017-05-025867-036-0835ND
2017-06-065867-030-0830ND
2017-06-065867-031-0835ND
2017-06-065867-032-0840ND
2017-06-065867-036-0810ND
2017-07-115867-030-0818ND
2017-07-115867-031-0822ND
2017-07-115867-032-0833ND
2017-07-115867-036-0804ND
2017-08-015867-030-0719ND
2017-08-015867-032-0725ND
2017-08-015867-036-0833ND
2017-09-055867-030-0836ND
2017-09-055867-032-0846ND
2017-09-055867-036-0822ND
2017-10-035867-030-0830ND
2017-10-035867-032-0835ND
2017-10-035867-036-0815ND
2017-11-075867-030-0855ND
2017-11-075867-031-0857ND
2017-11-075867-032-0903ND
2017-11-075867-036-0840ND
2017-12-055867-030-0852ND
2017-12-055867-031-0858ND
2017-12-055867-032-0835ND
2017-12-055867-036-0824ND
2018-01-025867-030-0803ND
2018-01-025867-031-0810ND
2018-01-025867-032-0743ND
2018-01-025867-036-0915ND
2018-02-065867-030-0810ND
2018-02-065867-031-0816ND
2018-02-065867-032-0825ND
2018-02-065867-036-1002ND
2018-03-065867-030-0728ND
2018-03-065867-031-0734ND
2018-03-065867-032-0738ND
2018-03-065867-036-0848ND
2018-04-035867-030-0810ND
2018-04-035867-031-0817ND
2018-04-035867-032-0824ND
2018-04-035867-036-0935ND
2018-05-015867-005-0919ND
2018-05-015867-006-0930ND
2018-05-015867-016-1010ND
2018-05-015867-019-0938ND
2018-05-015867-020-0950ND
2018-05-015867-030-0818ND
2018-05-015867-030-0822ND
2018-05-015867-031-0828ND
2018-05-015867-031-0833ND
2018-05-015867-032-0901ND
2018-05-015867-032-0905ND
2018-05-015867-036-0803ND
2018-06-055867-030-0820ND
2018-06-055867-031-0825ND
2018-06-055867-032-0830ND
2018-06-055867-036-0806ND
2018-07-105867-030-0846ND
2018-07-105867-031-0857ND
2018-07-105867-032-0821ND
2018-07-105867-036-0808ND
2018-08-075867-030-0854ND
2018-08-075867-031-0857ND
2018-08-075867-032-0903ND
2018-08-075867-036-0837ND
2018-09-045867-030-0849ND
2018-09-045867-031-0949ND
2018-09-045867-032-1000ND
2018-09-045867-036-0834ND
2018-10-025867-030-0850ND
2018-10-025867-031-0856ND
2018-10-025867-032-0844ND
2018-10-025867-036-1041ND
2018-11-065867-030-1018ND
2018-11-065867-031-1023ND
2018-11-065867-032-1033ND
2018-11-065867-036-1006ND
2018-12-045867-030-0920ND
2018-12-045867-031-0910ND
2018-12-045867-032-1000ND
2018-12-045867-036-0857ND
2019-01-025867-030-1022ND
2019-01-025867-031-1027ND
2019-01-025867-032-1054ND
2019-01-025867-036-1012ND
2019-02-055867-030-0938ND
2019-02-055867-031-0945ND
2019-02-055867-032-0949ND
2019-02-055867-036-0915ND
2019-04-025867-030-1020ND
2019-04-025867-031-1028ND
2019-04-025867-032-1035ND
2019-04-025867-036-1108ND
2019-05-075867-030-1013ND
2019-05-075867-031-1020ND
2019-05-075867-032-1032ND
2019-05-075867-036-0850ND
2019-06-045867-030-0840ND
2019-06-045867-031-0852ND
2019-06-045867-032-0827ND
2019-06-045867-036-1033ND
2019-07-015867-030-0855ND
2019-07-015867-031-0905ND
2019-07-015867-032-0845ND
2019-07-015867-036-1105ND
2019-08-065867-030-0947ND
2019-08-065867-031-1000ND
2019-08-065867-032-0855ND
2019-08-065867-036-1045ND
2019-09-035867-030-0755ND
2019-09-035867-031-0805ND
2019-09-035867-032-0900ND
2019-09-035867-036-1035ND
2019-10-015867-030-0900ND
2019-10-015867-031-0910ND
2019-10-015867-032-0840ND
2019-10-015867-036-1125ND
2019-11-055867-030-0825ND
2019-11-055867-031-0820ND
2019-11-055867-032-08150.500 ppm
2019-11-055867-036-1000ND
2019-12-035867-030-1015ND
2019-12-035867-031-1015ND
2019-12-035867-032-1000ND
2019-12-035867-036-0850ND