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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

San Juan Basin Authority

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

MORE ABOUT THIS CONTAMINANT

 

405

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND1000ND
2015ND650ND
2016ND370ND
2017ND520ND
20180.0433 ppm756ND - 0.730 ppm
20190.0345 ppm766ND - 0.480 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.

EPA Maximum Contaminant
Level (MCL) 10 ppm

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2014-01-149590-010-0849ND
2014-01-229590-002-1105ND
2014-01-229590-003-1115ND
2014-01-229590-004-1125ND
2014-01-229590-005-1030ND
2014-01-229590-006-1145ND
2014-01-229590-014-1200ND
2014-01-229590-015-1215ND
2014-02-049590-001-1040ND
2014-02-049590-003-1218ND
2014-02-049590-004-1239ND
2014-02-049590-005-0959ND
2014-02-049590-014-1314ND
2014-02-049590-015-1339ND
2014-02-119590-002-0945ND
2014-02-119590-006-0839ND
2014-02-119590-010-1058ND
2014-03-049590-001-0940ND
2014-03-049590-002-1015ND
2014-03-049590-003-1039ND
2014-03-049590-004-1105ND
2014-03-049590-005-1120ND
2014-03-049590-006-0830ND
2014-03-049590-014-0905ND
2014-03-049590-015-0750ND
2014-03-139590-010-0809ND
2014-04-089590-001-0954ND
2014-04-089590-002-1018ND
2014-04-089590-003-1039ND
2014-04-089590-004-1105ND
2014-04-089590-005-1115ND
2014-04-089590-006-0913ND
2014-04-089590-014-0842ND
2014-04-089590-015-0758ND
2014-04-159590-010-1134ND
2014-05-069590-001-1008ND
2014-05-069590-002-1046ND
2014-05-069590-003-1116ND
2014-05-069590-004-1020ND
2014-05-069590-005-1130ND
2014-05-069590-006-0930ND
2014-05-069590-010-1340ND
2014-05-069590-014-0844ND
2014-05-069590-015-0758ND
2014-05-139590-010-1125ND
2014-06-039590-001-0942ND
2014-06-039590-002-1038ND
2014-06-039590-003-1010ND
2014-06-039590-004-1109ND
2014-06-039590-005-1125ND
2014-06-039590-006-0900ND
2014-06-039590-014-0820ND
2014-06-039590-015-0750ND
2014-06-109590-010-1058ND
2014-07-089590-002-0950ND
2014-07-089590-003-0915ND
2014-07-089590-004-1020ND
2014-07-089590-005-1050ND
2014-07-089590-014-0825ND
2014-07-089590-015-0738ND
2014-07-159590-006-0756ND
2014-07-159590-010-1322ND
2014-08-059590-003-1000ND
2014-08-059590-004-1035ND
2014-08-059590-005-1105ND
2014-08-059590-006-0920ND
2014-08-059590-014-0835ND
2014-08-059590-015-0750ND
2014-08-129590-010-1005ND
2014-09-039590-001-1300ND
2014-09-039590-003-1338ND
2014-09-039590-004-1354ND
2014-09-039590-005-1222ND
2014-09-039590-006-1431ND
2014-09-039590-014-1450ND
2014-09-039590-015-1515ND
2014-09-099590-010-1045ND
2014-09-239590-002-1315ND
2014-10-079590-001-0945ND
2014-10-079590-002-1015ND
2014-10-079590-004-1045ND
2014-10-079590-005-1130ND
2014-10-079590-006-0830ND
2014-10-149590-010-0930ND
2014-11-049590-001-0835ND
2014-11-049590-002-0908ND
2014-11-049590-004-0926ND
2014-11-049590-005-1100ND
2014-11-049590-006-1028ND
2014-11-119590-010-0748ND
2014-11-259590-003-0909ND
2014-11-259590-014-0838ND
2014-11-259590-015-0750ND
2014-12-029590-001-1115ND
2014-12-029590-002-1140ND
2014-12-029590-003-1205ND
2014-12-029590-004-1221ND
2014-12-029590-005-1400ND
2014-12-029590-006-1039ND
2014-12-099590-010-1033ND
2015-01-079590-001-0810ND
2015-01-079590-002-0825ND
2015-01-079590-003-0842ND
2015-01-079590-004-0903ND
2015-01-079590-005-0948ND
2015-01-079590-006-0735ND
2015-01-139590-010-1050ND
2015-02-039590-002-0940ND
2015-02-039590-003-1025ND
2015-02-039590-004-1044ND
2015-02-039590-005-1120ND
2015-02-039590-006-0900ND
2015-02-109590-010-1300ND
2015-03-039590-002-1018ND
2015-03-039590-003-1042ND
2015-03-039590-004-1109ND
2015-03-039590-005-1130ND
2015-03-039590-006-0930ND
2015-03-109590-010-1115ND
2015-04-079590-001-1208ND
2015-04-079590-002-1230ND
2015-04-079590-003-1247ND
2015-04-079590-004-1308ND
2015-04-079590-005-1130ND
2015-04-079590-006-1330ND
2015-04-149590-010-1130ND
2015-05-059590-002-0850ND
2015-05-059590-003-0910ND
2015-05-059590-004-0926ND
2015-05-139590-010-1044ND
2015-06-029590-002-0940ND
2015-06-029590-003-0918ND
2015-06-029590-004-1008ND
2015-06-029590-006-0858ND
2015-06-099590-010-0905ND
2015-08-129590-010-0916ND
2015-08-249590-002-1308ND
2015-08-249590-003-1313ND
2015-08-249590-004-1319ND
2015-08-249590-010-1230ND
2015-08-259590-001-0816ND
2015-08-259590-005-0833ND
2015-08-259590-006-0805ND
2015-08-259590-014-0755ND
2015-08-259590-015-0708ND
2015-09-089590-002-0840ND
2015-09-089590-003-0910ND
2015-09-089590-004-0938ND
2015-09-159590-010-0915ND
2015-10-069590-002-0847ND
2015-10-069590-003-0913ND
2015-10-069590-004-0939ND
2015-10-139590-010-1220ND
2015-11-099590-010-0945ND
2015-11-109590-010-0843ND
2015-11-309590-002-1118ND
2015-11-309590-003-1130ND
2015-11-309590-004-1141ND
2015-12-159590-010-1038ND
2015-12-229590-001-1135ND
2015-12-229590-002-1041ND
2015-12-229590-003-1046ND
2015-12-229590-004-1055ND
2015-12-229590-014-1149ND
2015-12-229590-015-1300ND
2016-02-019590-010-1121ND
2016-02-089590-001-1000ND
2016-02-089590-002-1027ND
2016-02-089590-003-1040ND
2016-02-089590-004-1052ND
2016-02-089590-005-1110ND
2016-02-089590-006-0840ND
2016-02-089590-014-0852ND
2016-02-089590-015-0909ND
2016-02-159590-010-0910ND
2016-03-079590-001-0815ND
2016-03-079590-002-0830ND
2016-03-079590-003-0841ND
2016-03-079590-004-0853ND
2016-03-219590-010-0855ND
2016-04-049590-001-0815ND
2016-04-049590-002-1110ND
2016-04-049590-003-1120ND
2016-04-049590-004-1130ND
2016-04-049590-005-1058ND
2016-04-119590-010-0850ND
2016-05-099590-010-0947ND
2016-05-179590-001-0928ND
2016-05-179590-002-0822ND
2016-05-179590-003-0845ND
2016-05-179590-004-0911ND
2016-05-179590-005-1010ND
2016-05-179590-015-0745ND
2016-07-059590-002-0943ND
2016-07-059590-003-1002ND
2016-07-059590-004-1020ND
2016-07-059590-015-1045ND
2016-07-129590-010-0840ND
2016-08-019590-002-0836ND
2016-08-019590-003-0906ND
2016-08-019590-004-0945ND
2016-08-089590-010-0824ND
2017-02-099590-002-0850ND
2017-02-099590-003-0930ND
2017-02-099590-004-1000ND
2017-02-189590-010-1210ND
2017-03-069590-002-0840ND
2017-03-069590-003-0907ND
2017-03-069590-004-0932ND
2017-03-139590-010-1045ND
2017-04-039590-002-0840ND
2017-04-039590-003-0900ND
2017-04-039590-004-0927ND
2017-04-109590-010-1000ND
2017-05-019590-002-0820ND
2017-05-019590-003-0840ND
2017-05-019590-004-0905ND
2017-05-099590-010-0735ND
2017-05-129590-010-1010ND
2017-07-059590-002-0820ND
2017-07-059590-003-0847ND
2017-07-059590-004-0911ND
2017-07-109590-010-1015ND
2017-08-039590-001-1423ND
2017-08-039590-005-1323ND
2017-08-089590-001-0820ND
2017-08-089590-002-0910ND
2017-08-089590-003-1012ND
2017-08-089590-005-1105ND
2017-08-159590-010-1125ND
2017-09-059590-001-0840ND
2017-09-059590-002-0910ND
2017-09-059590-003-0958ND
2017-09-059590-005-1056ND
2017-09-119590-010-1015ND
2017-09-289590-004-0915ND
2017-10-029590-010-1200ND
2017-10-099590-001-0910ND
2017-10-099590-002-1000ND
2017-10-099590-003-1032ND
2017-10-099590-004-1055ND
2017-10-099590-005-1140ND
2017-11-069590-001-0915ND
2017-11-069590-002-1000ND
2017-11-069590-003-1045ND
2017-11-069590-004-1125ND
2017-11-069590-005-1210ND
2017-11-069590-010-1145ND
2017-12-049590-001-1315ND
2017-12-049590-002-1358ND
2017-12-049590-003-1435ND
2017-12-049590-004-1505ND
2017-12-049590-005-1150ND
2017-12-119590-010-1020ND
2018-01-039590-001-07540.410 ppm
2018-01-039590-002-0827ND
2018-01-039590-003-0858ND
2018-01-039590-004-0926ND
2018-01-039590-005-1034ND
2018-01-089590-010-1250ND
2018-02-059590-001-09250.430 ppm
2018-02-059590-002-0959ND
2018-02-059590-003-1040ND
2018-02-059590-004-1110ND
2018-02-059590-005-1155ND
2018-02-129590-010-1145ND
2018-02-219590-001-0845ND
2018-02-219590-005-1006ND
2018-03-059590-001-0959ND
2018-03-059590-002-1032ND
2018-03-059590-003-1115ND
2018-03-059590-004-1140ND
2018-03-059590-005-1214ND
2018-03-129590-010-1112ND
2018-04-139590-001-0913ND
2018-04-139590-002-0955ND
2018-04-139590-003-1045ND
2018-04-139590-004-1120ND
2018-04-139590-005-1215ND
2018-04-139590-010-1330ND
2018-05-099590-001-0900ND
2018-05-099590-002-0945ND
2018-05-099590-003-1025ND
2018-05-099590-004-1055ND
2018-05-099590-005-1140ND
2018-05-149590-010-1118ND
2018-05-219590-010-1110ND
2018-06-049590-001-1345ND
2018-06-049590-002-1410ND
2018-06-049590-003-1433ND
2018-06-049590-004-1500ND
2018-06-049590-005-1125ND
2018-06-139590-010-1130ND
2018-07-029590-001-0915ND
2018-07-029590-002-0951ND
2018-07-029590-003-1033ND
2018-07-029590-004-1110ND
2018-07-029590-005-1145ND
2018-07-099590-010-1015ND
2018-08-089590-001-0845ND
2018-08-089590-002-0940ND
2018-08-089590-003-1030ND
2018-08-089590-004-1115ND
2018-08-089590-005-1200ND
2018-08-139590-010-1125ND
2018-09-049590-001-09300.500 ppm
2018-09-049590-002-1015ND
2018-09-049590-003-1045ND
2018-09-049590-004-1120ND
2018-09-049590-005-1205ND
2018-09-139590-010-1115ND
2018-10-029590-001-09000.510 ppm
2018-10-029590-002-0935ND
2018-10-029590-003-1015ND
2018-10-029590-004-1048ND
2018-10-029590-005-1125ND
2018-10-089590-010-1128ND
2018-11-059590-001-08250.670 ppm
2018-11-059590-002-0855ND
2018-11-059590-003-0925ND
2018-11-059590-004-0955ND
2018-11-059590-005-1028ND
2018-11-129590-010-1030ND
2018-12-079590-001-08500.730 ppm
2018-12-079590-002-0936ND
2018-12-079590-003-1010ND
2018-12-079590-004-1055ND
2018-12-079590-005-1135ND
2018-12-109590-010-1125ND
2019-02-124792-010-1415ND
2019-03-124792-010-1210ND
2019-03-134792-001-1200ND
2019-03-134792-002-1045ND
2019-03-134792-004-1115ND
2019-03-134792-005-1235ND
2019-03-134792-006-0940ND
2019-03-304792-006-0700ND
2019-03-304792-015-1100ND
2019-04-084792-001-09200.420 ppm
2019-04-084792-003-0950ND
2019-04-084792-004-1010ND
2019-04-084792-005-1040ND
2019-04-084792-006-0830ND
2019-04-094792-010-1345ND
2019-04-094792-015-1055ND
2019-05-144792-001-09390.440 ppm
2019-05-144792-003-0838ND
2019-05-144792-004-0756ND
2019-05-144792-005-1232ND
2019-05-144792-006-1118ND
2019-05-144792-010-1300ND
2019-05-144792-015-1030ND
2019-06-114792-001-1120ND
2019-06-114792-002-1015ND
2019-06-114792-003-1045ND
2019-06-114792-004-0940ND
2019-06-114792-005-1335ND
2019-06-114792-006-1335ND
2019-06-114792-010-1205ND
2019-06-114792-015-1215ND
2019-07-084792-001-09500.480 ppm
2019-07-084792-002-1035ND
2019-07-084792-003-1055ND
2019-07-084792-004-1020ND
2019-07-084792-005-1400ND
2019-07-084792-006-1315ND
2019-07-094792-010-0950ND
2019-07-094792-015-0900ND
2019-08-134792-001-09300.410 ppm
2019-08-134792-002-1010ND
2019-08-134792-003-1025ND
2019-08-134792-004-0955ND
2019-08-134792-005-1210ND
2019-08-134792-006-1155ND
2019-08-134792-010-1142ND
2019-08-134792-015-1125ND
2019-09-104792-001-1045ND
2019-09-104792-002-1145ND
2019-09-104792-003-1210ND
2019-09-104792-004-1125ND
2019-09-104792-005-1230ND
2019-09-104792-006-0955ND
2019-09-104792-010-1130ND
2019-09-104792-015-0935ND
2019-10-154792-001-07400.430 ppm
2019-10-154792-002-1110ND
2019-10-154792-003-1135ND
2019-10-154792-004-1025ND
2019-10-154792-005-1345ND
2019-10-154792-006-0945ND
2019-10-154792-010-1015ND
2019-10-154792-015-0845ND
2019-11-124792-010-0905ND
2019-11-194792-001-10320.440 ppm
2019-11-194792-002-1057ND
2019-11-194792-003-1130ND
2019-11-194792-005-1215ND
2019-11-194792-006-0955ND
2019-11-194792-015-0900ND
2019-12-104792-001-0945ND
2019-12-104792-002-1025ND
2019-12-104792-003-1105ND
2019-12-104792-005-1145ND
2019-12-104792-006-0905ND
2019-12-104792-010-1100ND