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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

East Bay Municipal Utility District

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

641

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND520ND
20130.0235 ppm513ND - 0.400 ppm
2014ND540ND
20150.0253 ppm1628ND - 0.540 ppm
2016ND1610ND
20170.00497 ppm1612ND - 0.400 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL) 10 ppm

ppm = parts per million

All test results

Date Lab ID Result
2012-01-038201-005-0900ND
2012-01-038201-012-0840ND
2012-02-078201-005-1000ND
2012-02-078201-012-1035ND
2012-03-068201-005-0835ND
2012-03-068201-012-0800ND
2012-03-208201-004-0730ND
2012-04-038201-004-0900ND
2012-04-038201-005-0915ND
2012-04-038201-012-0820ND
2012-04-248201-009-0840ND
2012-05-018201-004-0915ND
2012-05-018201-005-0955ND
2012-05-018201-009-0835ND
2012-05-018201-012-0930ND
2012-05-158201-011-0830ND
2012-06-058201-004-0840ND
2012-06-058201-005-0830ND
2012-06-058201-009-0950ND
2012-06-058201-012-0930ND
2012-06-128201-011-0900ND
2012-06-268201-009-0915ND
2012-07-038201-004-0921ND
2012-07-038201-005-0945ND
2012-07-038201-009-0836ND
2012-07-038201-011-0816ND
2012-07-038201-012-1015ND
2012-07-108201-004-0648ND
2012-07-108201-012-0800ND
2012-07-178201-005-0905ND
2012-07-188201-005-1350ND
2012-07-188201-011-0853ND
2012-08-078201-004-0906ND
2012-08-078201-005-1050ND
2012-08-078201-009-0815ND
2012-08-078201-011-0835ND
2012-08-078201-012-0820ND
2012-09-048201-004-0850ND
2012-09-048201-005-0940ND
2012-09-048201-009-0810ND
2012-09-048201-011-0800ND
2012-09-048201-012-0955ND
2012-10-028201-004-0800ND
2012-10-028201-005-0845ND
2012-10-028201-009-1132ND
2012-10-028201-012-0955ND
2012-11-068201-004-0801ND
2012-11-068201-005-0900ND
2012-11-068201-009-0900ND
2012-11-068201-012-0920ND
2012-12-048201-005-0930ND
2012-12-048201-012-0845ND
2013-01-088201-005-0815ND
2013-01-088201-012-0840ND
2013-02-058201-005-0720ND
2013-02-058201-012-0835ND
2013-03-058201-005-0830ND
2013-03-058201-012-0930ND
2013-03-198201-009-0945ND
2013-03-198201-011-08200.400 ppm
2013-03-208201-011-08200.400 ppm
2013-03-298201-004-1035ND
2013-04-028201-004-0916ND
2013-04-028201-005-0655ND
2013-04-028201-009-0830ND
2013-04-028201-011-09000.400 ppm
2013-04-028201-012-0800ND
2013-05-078201-004-0700ND
2013-05-078201-005-0725ND
2013-05-078201-009-0850ND
2013-05-078201-012-0830ND
2013-06-048201-004-0750ND
2013-06-048201-005-0722ND
2013-06-048201-009-0845ND
2013-06-048201-012-0900ND
2013-07-028201-005-0730ND
2013-07-028201-009-0825ND
2013-07-028201-012-0900ND
2013-07-118201-005-1025ND
2013-07-158201-005-1235ND
2013-07-238201-004-0745ND
2013-07-238201-009-1030ND
2013-07-238201-012-0839ND
2013-08-068201-004-0950ND
2013-08-068201-005-0803ND
2013-08-068201-009-0800ND
2013-08-068201-012-0840ND
2013-09-038201-004-0915ND
2013-09-038201-005-0715ND
2013-09-038201-009-0830ND
2013-09-038201-012-0855ND
2013-10-018201-004-0930ND
2013-10-018201-005-0700ND
2013-10-018201-009-0805ND
2013-10-018201-012-0850ND
2013-11-018201-009-0850ND
2013-11-058201-004-0811ND
2013-11-058201-005-0745ND
2013-11-058201-012-0955ND
2013-12-028201-009-0925ND
2013-12-038201-004-0822ND
2013-12-038201-005-0845ND
2013-12-038201-012-0815ND
2014-01-078201-005-0925ND
2014-01-078201-012-0835ND
2014-02-048201-005-0713ND
2014-02-048201-012-0850ND
2014-02-258201-004-0805ND
2014-03-048201-004-0800ND
2014-03-048201-005-0902ND
2014-03-048201-012-0920ND
2014-03-058201-011-0908ND
2014-04-018201-004-0730ND
2014-04-018201-005-0846ND
2014-04-018201-011-0855ND
2014-04-018201-012-0806ND
2014-04-088201-011-0820ND
2014-04-238201-005-0720ND
2014-04-298201-009-0745ND
2014-06-038201-004-0945ND
2014-06-038201-005-0825ND
2014-06-038201-009-0835ND
2014-06-038201-011-0930ND
2014-06-038201-012-0805ND
2014-06-168201-009-0915ND
2014-06-178201-004-0900ND
2014-06-178201-012-1030ND
2014-07-018201-004-0807ND
2014-07-018201-005-0920ND
2014-07-018201-009-0800ND
2014-07-018201-011-0730ND
2014-07-018201-012-0944ND
2014-08-058201-004-0850ND
2014-08-058201-005-0840ND
2014-08-058201-009-0900ND
2014-08-058201-011-0735ND
2014-08-058201-012-0850ND
2014-09-028201-004-0720ND
2014-09-028201-005-0805ND
2014-09-028201-009-0830ND
2014-09-028201-011-0847ND
2014-09-028201-012-0930ND
2014-09-108201-005-0905ND
2014-10-078201-004-0725ND
2014-10-078201-005-0805ND
2014-10-078201-009-0930ND
2014-10-078201-011-0745ND
2014-10-078201-012-0815ND
2014-11-048201-004-0900ND
2014-11-048201-005-0920ND
2014-11-048201-009-0840ND
2014-11-048201-011-0800ND
2014-11-048201-012-0940ND
2014-12-028201-005-1000ND
2014-12-028201-011-0832ND
2014-12-028201-012-1000ND
2014-12-038201-009-0915ND
2015-01-068201-005-0754ND
2015-01-068201-009-0810ND
2015-01-068201-011-08150.530 ppm
2015-01-068201-012-0905ND
2015-01-078201-011-12430.540 ppm
2015-01-138201-011-09000.520 ppm
2015-01-138201-012-0845ND
2015-01-208201-005-1401ND
2015-01-208201-011-08150.530 ppm
2015-01-208201-012-1401ND
2015-01-278201-011-07510.520 ppm
2015-01-298201-005-0815ND
2015-01-308201-012-0815ND
2015-02-038201-005-0855ND
2015-02-038201-009-0946ND
2015-02-038201-011-09110.500 ppm
2015-02-038201-012-0805ND
2015-02-048201-011-08080.490 ppm
2015-02-108201-005-0812ND
2015-02-178201-005-0900ND
2015-02-178201-012-0910ND
2015-02-248201-005-1014ND
2015-02-248201-012-0705ND
2015-03-038201-005-1038ND
2015-03-038201-009-0650ND
2015-03-038201-011-08160.470 ppm
2015-03-038201-012-0800ND
2015-03-108201-005-0835ND
2015-03-108201-012-0810ND
2015-03-178201-005-0755ND
2015-03-178201-012-0750ND
2015-03-248201-012-0800ND
2015-03-258201-005-1030ND
2015-03-308201-012-0730ND
2015-03-318201-005-1040ND
2015-03-318201-012-0810ND
2015-04-078201-005-0912ND
2015-04-078201-009-0845ND
2015-04-078201-011-0756ND
2015-04-078201-012-0810ND
2015-04-148201-012-0710ND
2015-04-218201-012-0800ND
2015-04-288201-005-1000ND
2015-04-288201-012-0900ND
2015-05-058201-005-0750ND
2015-05-058201-009-0846ND
2015-05-058201-011-0816ND
2015-05-058201-012-0805ND
2015-05-128201-004-0745ND
2015-05-128201-005-1136ND
2015-05-128201-012-0705ND
2015-05-198201-004-1015ND
2015-05-198201-005-0830ND
2015-05-198201-012-0900ND
2015-05-268201-004-1120ND
2015-05-268201-005-0900ND
2015-05-268201-012-0900ND
2015-06-028201-004-0724ND
2015-06-028201-005-0840ND
2015-06-028201-009-0816ND
2015-06-028201-011-0729ND
2015-06-028201-012-0900ND
2015-06-098201-004-0845ND
2015-06-098201-012-0900ND
2015-06-168201-004-0955ND
2015-06-168201-005-0830ND
2015-06-168201-012-0835ND
2015-06-238201-004-1145ND
2015-06-238201-005-1210ND
2015-06-238201-012-0900ND
2015-06-308201-004-0930ND
2015-06-308201-005-0950ND
2015-06-308201-012-0745ND
2015-07-078201-004-1037ND
2015-07-078201-005-0716ND
2015-07-078201-011-0749ND
2015-07-098201-005-0809ND
2015-07-148201-004-1015ND
2015-07-148201-005-0907ND
2015-07-148201-009-0841ND
2015-07-148201-012-0800ND
2015-07-158201-009-0750ND
2015-07-218201-004-1004ND
2015-07-218201-005-0754ND
2015-07-218201-011-0835ND
2015-07-218201-012-0830ND
2015-07-218201-012-0850ND
2015-07-288201-004-1035ND
2015-07-288201-004-1051ND
2015-07-288201-005-0736ND
2015-07-288201-012-0800ND
2015-07-308201-005-1212ND
2015-08-048201-004-0800ND
2015-08-048201-005-0658ND
2015-08-048201-009-0850ND
2015-08-048201-011-0842ND
2015-08-048201-012-0845ND
2015-08-118201-004-0918ND
2015-08-118201-005-0729ND
2015-08-118201-012-0720ND
2015-08-188201-004-0815ND
2015-08-188201-005-0935ND
2015-08-188201-012-0810ND
2015-08-258201-004-0815ND
2015-08-258201-005-0809ND
2015-08-258201-012-0950ND
2015-09-018201-004-0803ND
2015-09-018201-005-0717ND
2015-09-018201-009-0830ND
2015-09-018201-011-0813ND
2015-09-018201-012-0835ND
2015-09-088201-004-0813ND
2015-09-088201-005-0830ND
2015-09-108201-012-0730ND
2015-09-158201-004-1016ND
2015-09-158201-005-0708ND
2015-09-158201-012-0805ND
2015-09-168201-012-0930ND
2015-09-228201-004-1004ND
2015-09-228201-005-0712ND
2015-09-228201-012-0855ND
2015-09-298201-004-1044ND
2015-09-298201-005-0915ND
2015-09-298201-012-0800ND
2015-10-068201-004-0740ND
2015-10-068201-005-0730ND
2015-10-068201-009-0825ND
2015-10-068201-011-0758ND
2015-10-068201-012-0845ND
2015-10-138201-004-0912ND
2015-10-138201-005-0740ND
2015-10-138201-012-0815ND
2015-10-208201-004-0940ND
2015-10-208201-005-0837ND
2015-10-208201-012-0920ND
2015-10-278201-004-0820ND
2015-10-278201-005-0754ND
2015-10-278201-012-0900ND
2015-11-038201-004-1004ND
2015-11-038201-005-0815ND
2015-11-038201-009-0855ND
2015-11-038201-011-0810ND
2015-11-038201-012-0917ND
2015-11-108201-005-0727ND
2015-11-108201-012-0818ND
2015-11-178201-005-0703ND
2015-11-178201-012-0900ND
2015-11-248201-005-0755ND
2015-11-248201-012-0903ND
2015-12-018201-005-0832ND
2015-12-018201-009-0950ND
2015-12-018201-011-1025ND
2015-12-018201-012-0945ND
2015-12-088201-005-0751ND
2015-12-158201-005-0715ND
2015-12-168201-012-1044ND
2015-12-168201-013-0955ND
2015-12-178201-013-1010ND
2015-12-228201-005-0729ND
2015-12-228201-012-0750ND
2015-12-298201-005-0816ND
2015-12-298201-012-0854ND
2016-01-058201-005-0735ND
2016-01-058201-009-1055ND
2016-01-058201-011-1000ND
2016-01-058201-012-0820ND
2016-01-128201-005-0720ND
2016-01-128201-012-0812ND
2016-01-198201-005-0742ND
2016-01-198201-012-0805ND
2016-01-268201-005-0723ND
2016-01-268201-012-0815ND
2016-02-028201-005-0921ND
2016-02-028201-009-0815ND
2016-02-028201-011-0849ND
2016-02-028201-012-0845ND
2016-02-028201-013-0945ND
2016-02-098201-005-0750ND
2016-02-098201-012-1000ND
2016-02-168201-005-0829ND
2016-02-168201-012-0750ND
2016-02-168201-013-0910ND
2016-02-238201-005-0727ND
2016-02-238201-012-0900ND
2016-03-018201-005-0724ND
2016-03-018201-009-0905ND
2016-03-018201-011-0831ND
2016-03-018201-012-0820ND
2016-03-088201-005-0755ND
2016-03-088201-013-0901ND
2016-03-158201-005-0826ND
2016-03-158201-012-0915ND
2016-03-228201-005-0739ND
2016-03-228201-012-0900ND
2016-03-298201-005-0725ND
2016-03-298201-012-0800ND
2016-04-058201-005-0700ND
2016-04-058201-012-0830ND
2016-04-128201-004-0913ND
2016-04-128201-005-0735ND
2016-04-128201-012-0845ND
2016-04-198201-004-0906ND
2016-04-198201-005-0809ND
2016-04-198201-012-0930ND
2016-04-268201-004-0845ND
2016-04-268201-005-1042ND
2016-04-268201-012-0910ND
2016-05-038201-004-0945ND
2016-05-038201-005-0835ND
2016-05-038201-012-0815ND
2016-05-108201-004-0722ND
2016-05-108201-005-0710ND
2016-05-108201-012-0807ND
2016-05-178201-004-0945ND
2016-05-178201-005-0704ND
2016-05-178201-012-1005ND
2016-05-248201-004-0835ND
2016-05-248201-005-0709ND
2016-05-248201-012-0820ND
2016-05-318201-004-1150ND
2016-05-318201-005-0702ND
2016-05-318201-012-0750ND
2016-06-078201-004-0934ND
2016-06-078201-005-0722ND
2016-06-078201-012-0820ND
2016-06-138201-005-0815ND
2016-06-148201-004-0845ND
2016-06-148201-005-0724ND
2016-06-148201-009-0830ND
2016-06-148201-012-0750ND
2016-06-218201-004-0850ND
2016-06-218201-005-0704ND
2016-06-218201-012-0810ND
2016-06-288201-004-0945ND
2016-06-288201-005-0706ND
2016-06-288201-012-0710ND
2016-06-298201-004-0845ND
2016-06-298201-012-0843ND
2016-07-058201-004-0907ND
2016-07-058201-005-0705ND
2016-07-058201-005-0911ND
2016-07-058201-009-0910ND
2016-07-058201-012-0805ND
2016-07-128201-005-0816ND
2016-07-128201-009-0900ND
2016-07-198201-004-0924ND
2016-07-198201-005-0805ND
2016-07-198201-012-0835ND
2016-07-268201-004-0926ND
2016-07-268201-005-0708ND
2016-07-268201-012-0715ND
2016-08-028201-004-0850ND
2016-08-028201-005-0700ND
2016-08-028201-009-0850ND
2016-08-028201-012-0825ND
2016-08-098201-004-1000ND
2016-08-098201-005-0734ND
2016-08-098201-012-1040ND
2016-08-168201-004-1030ND
2016-08-168201-005-0745ND
2016-08-168201-012-0815ND
2016-08-238201-004-0900ND
2016-08-238201-005-0730ND
2016-08-238201-012-0900ND
2016-08-308201-004-0950ND
2016-08-308201-005-0723ND
2016-08-308201-012-0810ND
2016-09-068201-004-0825ND
2016-09-068201-005-0735ND
2016-09-068201-009-1024ND
2016-09-068201-012-0835ND
2016-09-138201-004-0905ND
2016-09-138201-005-0715ND
2016-09-138201-012-0925ND
2016-09-138201-013-1008ND
2016-09-208201-004-1000ND
2016-09-208201-005-1040ND
2016-09-208201-011-0826ND
2016-09-208201-012-0815ND
2016-09-278201-004-1000ND
2016-09-278201-005-0710ND
2016-09-278201-012-0820ND
2016-10-048201-004-0940ND
2016-10-048201-005-0730ND
2016-10-048201-009-0833ND
2016-10-048201-011-0830ND
2016-10-048201-012-0835ND
2016-10-118201-004-0930ND
2016-10-118201-005-0715ND
2016-10-118201-012-0830ND
2016-10-188201-004-0900ND
2016-10-188201-005-0710ND
2016-10-188201-012-0810ND
2016-10-258201-004-0910ND
2016-10-258201-005-0900ND
2016-10-258201-011-0850ND
2016-10-258201-012-0926ND
2016-10-258201-013-0940ND
2016-11-018201-004-0830ND
2016-11-018201-005-0700ND
2016-11-018201-009-0855ND
2016-11-018201-011-0935ND
2016-11-018201-012-0844ND
2016-11-018201-013-0900ND
2016-11-088201-004-0930ND
2016-11-088201-012-0900ND
2016-11-158201-004-0855ND
2016-11-158201-012-0919ND
2016-11-228201-004-0915ND
2016-11-228201-012-0855ND
2016-11-298201-004-0930ND
2016-11-298201-012-0800ND
2016-12-068201-004-0817ND
2016-12-068201-009-0800ND
2016-12-068201-011-0835ND
2016-12-068201-012-1010ND
2016-12-068201-013-0835ND
2016-12-138201-004-1000ND
2016-12-138201-012-1015ND
2016-12-208201-004-0950ND
2016-12-208201-012-0645ND
2016-12-278201-004-0950ND
2016-12-278201-012-0715ND
2017-01-038201-004-0745ND
2017-01-038201-009-0805ND
2017-01-038201-011-08010.400 ppm
2017-01-038201-012-0750ND
2017-01-038201-013-1005ND
2017-01-108201-004-0830ND
2017-01-108201-012-0945ND
2017-01-178201-004-0845ND
2017-01-178201-012-0905ND
2017-01-248201-004-1005ND
2017-01-248201-012-0720ND
2017-01-318201-004-0950ND
2017-01-318201-012-0640ND
2017-02-018201-004-0830ND
2017-02-018201-012-0725ND
2017-02-078201-004-1000ND
2017-02-078201-009-0917ND
2017-02-078201-011-0950ND
2017-02-078201-012-0745ND
2017-02-078201-013-0830ND
2017-02-148201-004-1210ND
2017-02-148201-012-0928ND
2017-02-218201-004-0837ND
2017-02-218201-012-0930ND
2017-02-218201-013-0825ND
2017-02-228201-009-0850ND
2017-02-228201-011-08550.400 ppm
2017-02-288201-004-0957ND
2017-03-078201-004-0720ND
2017-03-078201-009-0820ND
2017-03-078201-011-0800ND
2017-03-078201-012-0745ND
2017-03-078201-013-0855ND
2017-03-148201-004-0900ND
2017-03-148201-012-0730ND
2017-03-218201-004-0900ND
2017-03-218201-012-0825ND
2017-04-048201-004-0755ND
2017-04-048201-009-1014ND
2017-04-048201-011-0835ND
2017-04-048201-012-0821ND
2017-04-048201-013-0925ND
2017-04-118201-012-0730ND
2017-04-188201-004-0805ND
2017-04-188201-005-0845ND
2017-04-188201-012-1015ND
2017-04-258201-004-0810ND
2017-04-258201-005-0909ND
2017-04-258201-012-0730ND
2017-05-028201-004-0830ND
2017-05-028201-005-0915ND
2017-05-028201-009-0850ND
2017-05-028201-011-0855ND
2017-05-028201-012-0800ND
2017-05-028201-013-0825ND
2017-05-098201-004-0730ND
2017-05-098201-005-0857ND
2017-05-098201-012-0715ND
2017-05-168201-004-1045ND
2017-05-168201-012-0740ND
2017-05-178201-005-0910ND
2017-05-238201-004-0910ND
2017-05-238201-005-1055ND
2017-05-238201-012-1115ND
2017-05-308201-004-0950ND
2017-05-308201-005-1100ND
2017-05-308201-012-0800ND
2017-06-068201-004-0815ND
2017-06-068201-005-0930ND
2017-06-068201-009-0821ND
2017-06-068201-011-0830ND
2017-06-068201-012-0830ND
2017-06-138201-004-0835ND
2017-06-138201-005-0932ND
2017-06-138201-012-0900ND
2017-06-208201-004-0840ND
2017-06-208201-005-1010ND
2017-06-278201-004-0810ND
2017-06-278201-004-1015ND
2017-06-278201-005-0753ND
2017-06-278201-012-0655ND
2017-06-278201-012-0910ND
2017-06-288201-005-0903ND
2017-07-058201-004-0945ND
2017-07-058201-005-1230ND
2017-07-058201-009-0735ND
2017-07-058201-011-0842ND
2017-07-058201-012-0740ND
2017-07-118201-004-0840ND
2017-07-118201-005-0850ND
2017-07-118201-012-0745ND
2017-07-188201-004-0758ND
2017-07-188201-005-0745ND
2017-07-188201-012-0850ND
2017-07-258201-004-1240ND
2017-07-258201-005-0713ND
2017-07-258201-012-0815ND
2017-07-268201-005-0913ND
2017-08-018201-004-0840ND
2017-08-018201-005-0712ND
2017-08-018201-009-0900ND
2017-08-018201-011-0830ND
2017-08-018201-012-0820ND
2017-08-088201-005-0757ND
2017-08-088201-012-0745ND
2017-08-158201-004-1103ND
2017-08-158201-005-0716ND
2017-08-158201-012-0932ND
2017-08-228201-004-0945ND
2017-08-228201-005-0828ND
2017-08-228201-012-0700ND
2017-08-298201-004-1020ND
2017-08-298201-005-0715ND
2017-08-298201-012-0930ND
2017-09-058201-004-0910ND
2017-09-058201-005-0910ND
2017-09-058201-009-0900ND
2017-09-058201-012-0745ND
2017-09-128201-004-0830ND
2017-09-128201-005-0710ND
2017-09-128201-012-0810ND
2017-09-198201-004-0850ND
2017-09-198201-005-0729ND
2017-09-198201-012-0820ND
2017-09-268201-004-0930ND
2017-09-268201-005-0820ND
2017-09-268201-012-0830ND
2017-10-038201-004-0830ND
2017-10-038201-005-0925ND
2017-10-038201-009-0855ND
2017-10-038201-012-0730ND
2017-10-108201-004-1005ND
2017-10-108201-005-0740ND
2017-10-108201-012-0810ND
2017-10-178201-004-1000ND
2017-10-178201-005-0923ND
2017-10-178201-012-0830ND
2017-10-248201-004-0935ND
2017-10-248201-005-0905ND
2017-10-248201-012-0645ND
2017-10-318201-004-0915ND
2017-10-318201-005-0843ND
2017-10-318201-012-0910ND
2017-11-078201-004-0850ND
2017-11-078201-012-0810ND
2017-11-148201-005-0715ND
2017-11-158201-004-1220ND
2017-11-158201-012-1150ND
2017-11-218201-005-0710ND
2017-11-218201-012-0825ND
2017-11-288201-005-0812ND
2017-11-288201-012-0740ND
2017-12-058201-005-0910ND
2017-12-058201-012-0920ND
2017-12-128201-005-0718ND
2017-12-128201-009-0825ND
2017-12-128201-012-0810ND
2017-12-198201-005-1340ND
2017-12-198201-012-0835ND
2017-12-268201-005-0730ND
2017-12-268201-012-1010ND