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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

Gleanings For The Hungry

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

 

323

Samples

9

Samples exceeding legal limit (MCL)

168

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.94 ppm3114ND - 28.0 ppm
20150.905 ppm207ND - 6.20 ppm
20162.57 ppm5430ND - 35.0 ppm
20171.48 ppm6029ND - 11.0 ppm
20181.26 ppm7236ND - 7.50 ppm
20192.50 ppm8652ND - 35.0 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
2014-01-217706-002-12551.18 ppm
2014-01-217706-003-1300ND
2014-01-217706-004-1303ND
2014-01-217706-005-1305ND
2014-01-217706-006-1307ND
2014-01-217706-007-1310ND
2014-01-217706-008-13120.804 ppm
2014-01-217706-009-1314ND
2014-01-217706-010-13162.82 ppm
2014-01-217706-011-1317ND
2014-01-217706-012-1330ND
2014-01-217706-013-13275.76 ppm
2014-01-217706-014-1320ND
2014-01-217706-015-13230.596 ppm
2014-01-217706-016-1325ND
2014-01-217706-019-124028.0 ppm
2014-08-137706-002-13361.62 ppm
2014-08-137706-003-1337ND
2014-08-137706-004-13381.27 ppm
2014-08-137706-005-1339ND
2014-08-137706-006-13402.04 ppm
2014-08-137706-007-1341ND
2014-08-137706-008-13423.46 ppm
2014-08-137706-009-1343ND
2014-08-137706-010-13444.25 ppm
2014-08-137706-011-13451.19 ppm
2014-08-137706-012-1354ND
2014-08-137706-013-1353ND
2014-08-137706-014-1350ND
2014-08-137706-015-13514.16 ppm
2014-08-137706-016-13522.87 ppm
2015-11-047706-002-10301.20 ppm
2015-11-047706-003-1033ND
2015-11-047706-004-1036ND
2015-11-047706-005-1038ND
2015-11-047706-006-10406.20 ppm
2015-11-047706-007-1042ND
2015-11-047706-008-1044ND
2015-11-047706-009-10462.00 ppm
2015-11-047706-010-10481.50 ppm
2015-11-047706-011-1050ND
2015-11-047706-012-1102ND
2015-11-047706-013-1100ND
2015-11-047706-014-1053ND
2015-11-047706-015-1055ND
2015-11-047706-016-1057ND
2015-12-027706-002-13220.800 ppm
2015-12-027706-010-13241.30 ppm
2015-12-027706-011-13265.10 ppm
2015-12-027706-015-1330ND
2015-12-027706-016-1332ND
2016-01-147706-003-1030ND
2016-01-147706-004-10320.400 ppm
2016-01-147706-005-1034ND
2016-01-147706-006-10368.70 ppm
2016-01-147706-007-1038ND
2016-01-147706-008-10402.20 ppm
2016-01-147706-009-10421.000 ppm
2016-01-147706-010-10441.60 ppm
2016-01-147706-011-104620.6 ppm
2016-01-147706-012-1056ND
2016-01-147706-013-10540.900 ppm
2016-01-147706-015-1048ND
2016-01-147706-015-1050ND
2016-01-147706-016-1052ND
2016-02-235810-006-131035.0 ppm
2016-02-235810-008-13309.30 ppm
2016-02-235810-009-1325ND
2016-02-235810-012-13302.00 ppm
2016-02-235810-013-13206.90 ppm
2016-02-265810-002-13000.790 ppm
2016-02-265810-006-1310ND
2016-03-105810-002-10400.760 ppm
2016-03-105810-010-1130ND
2016-03-105810-011-1049ND
2016-03-105810-014-1055ND
2016-03-105810-015-1100ND
2016-03-105810-016-1107ND
2016-04-075810-002-10500.860 ppm
2016-04-075810-003-1037ND
2016-04-075810-004-11051.70 ppm
2016-04-075810-005-11001.70 ppm
2016-04-075810-007-1155ND
2016-05-095810-002-14481.10 ppm
2016-06-025810-002-13160.910 ppm
2016-07-075810-002-10270.870 ppm
2016-08-015810-002-14351.20 ppm
2016-08-015810-009-14425.70 ppm
2016-09-015810-002-11031.20 ppm
2016-09-015810-007-11501.90 ppm
2016-09-015810-009-11106.80 ppm
2016-09-015810-011-11148.80 ppm
2016-09-015810-013-11398.00 ppm
2016-11-075810-002-11160.890 ppm
2016-11-075810-007-1126ND
2016-11-075810-009-1130ND
2016-11-075810-011-1133ND
2016-11-075810-013-1120ND
2016-11-075810-021-11113.30 ppm
2016-12-015810-002-12000.810 ppm
2016-12-015810-007-1205ND
2016-12-015810-009-1207ND
2016-12-015810-011-1210ND
2016-12-015810-013-1250ND
2016-12-015810-021-11563.00 ppm
2017-01-055810-002-14250.640 ppm
2017-01-055810-007-1430ND
2017-01-055810-009-1438ND
2017-01-055810-011-1440ND
2017-01-055810-013-1435ND
2017-01-055810-021-14202.70 ppm
2017-02-025810-002-10100.640 ppm
2017-02-025810-007-1015ND
2017-02-025810-009-1017ND
2017-02-025810-011-10200.850 ppm
2017-02-025810-013-10250.860 ppm
2017-02-025810-021-10052.60 ppm
2017-03-025810-002-11100.630 ppm
2017-03-025810-007-1115ND
2017-03-025810-009-1125ND
2017-03-025810-011-11283.40 ppm
2017-03-025810-013-11185.80 ppm
2017-03-025810-021-11052.60 ppm
2017-04-045810-002-14451.90 ppm
2017-04-045810-007-1450ND
2017-04-045810-009-1455ND
2017-04-045810-011-14557.60 ppm
2017-04-045810-013-150011.0 ppm
2017-04-045810-021-14402.60 ppm
2017-05-105810-002-13352.70 ppm
2017-05-105810-007-1550ND
2017-05-105810-009-1555ND
2017-05-105810-011-1557ND
2017-05-105810-013-1600ND
2017-05-105810-021-13302.40 ppm
2017-06-125810-002-15452.50 ppm
2017-06-125810-007-1548ND
2017-06-125810-009-1550ND
2017-06-125810-011-1552ND
2017-06-125810-013-1555ND
2017-06-125810-021-15401.40 ppm
2017-08-095810-002-15152.00 ppm
2017-08-095810-007-1520ND
2017-08-095810-009-1525ND
2017-08-095810-011-1530ND
2017-08-095810-013-16014.40 ppm
2017-08-095810-021-15103.20 ppm
2017-09-125810-002-10302.00 ppm
2017-09-125810-007-1040ND
2017-09-125810-009-1050ND
2017-09-125810-011-1055ND
2017-09-125810-013-1100ND
2017-09-125810-021-10103.30 ppm
2017-11-065810-002-13551.60 ppm
2017-11-065810-007-1400ND
2017-11-065810-009-1405ND
2017-11-065810-011-14105.90 ppm
2017-11-065810-013-1415ND
2017-11-065810-021-13503.70 ppm
2017-12-055810-002-14501.40 ppm
2017-12-055810-007-1455ND
2017-12-055810-009-1500ND
2017-12-055810-011-15055.20 ppm
2017-12-055810-013-1510ND
2017-12-055810-021-14453.40 ppm
2018-01-185810-002-11101.10 ppm
2018-01-185810-007-1150ND
2018-01-185810-009-1155ND
2018-01-185810-011-1200ND
2018-01-185810-013-1400ND
2018-01-185810-021-11053.40 ppm
2018-02-085810-002-14400.910 ppm
2018-02-085810-007-1445ND
2018-02-085810-009-1450ND
2018-02-085810-011-1455ND
2018-02-085810-013-15002.20 ppm
2018-02-085810-021-14353.40 ppm
2018-03-205810-002-13550.900 ppm
2018-03-205810-007-14000.450 ppm
2018-03-205810-009-1405ND
2018-03-205810-011-1410ND
2018-03-205810-013-1420ND
2018-03-205810-021-13503.20 ppm
2018-04-245810-002-13451.000 ppm
2018-04-245810-007-13502.40 ppm
2018-04-245810-009-1355ND
2018-04-245810-011-1300ND
2018-04-245810-013-1305ND
2018-04-245810-021-13403.30 ppm
2018-05-115810-002-09351.80 ppm
2018-05-115810-007-09406.20 ppm
2018-05-115810-009-0945ND
2018-05-115810-011-0950ND
2018-05-115810-013-09500.750 ppm
2018-05-115810-021-09303.30 ppm
2018-06-225810-002-14103.00 ppm
2018-06-225810-007-1415ND
2018-06-225810-009-1420ND
2018-06-225810-011-14250.480 ppm
2018-06-225810-013-1430ND
2018-06-225810-021-14053.80 ppm
2018-07-045810-002-10274.40 ppm
2018-07-045810-007-10550.480 ppm
2018-07-045810-009-1103ND
2018-07-045810-011-1105ND
2018-07-045810-013-1059ND
2018-07-045810-021-10393.80 ppm
2018-08-095810-002-11193.50 ppm
2018-08-095810-007-1231ND
2018-08-095810-009-1225ND
2018-08-095810-011-1220ND
2018-08-095810-013-1210ND
2018-08-095810-021-11273.00 ppm
2018-09-205810-002-10302.70 ppm
2018-09-205810-007-11560.420 ppm
2018-09-205810-009-1158ND
2018-09-205810-011-1159ND
2018-09-205810-013-12020.430 ppm
2018-09-205810-021-10253.20 ppm
2018-10-095810-002-13502.30 ppm
2018-10-095810-007-1400ND
2018-10-095810-009-1403ND
2018-10-095810-011-1407ND
2018-10-095810-013-1410ND
2018-10-095810-021-13433.60 ppm
2018-11-055810-002-15031.90 ppm
2018-11-055810-007-15332.20 ppm
2018-11-055810-009-1538ND
2018-11-055810-011-1547ND
2018-11-055810-013-1542ND
2018-11-055810-021-14593.80 ppm
2018-12-055810-002-11171.40 ppm
2018-12-055810-004-1148ND
2018-12-055810-005-1146ND
2018-12-055810-006-11520.940 ppm
2018-12-055810-007-11507.50 ppm
2018-12-055810-021-10533.60 ppm
2019-01-085810-002-10054.00 ppm
2019-01-085810-008-0955ND
2019-01-085810-009-0950ND
2019-01-085810-010-0945ND
2019-01-085810-011-0941ND
2019-01-085810-021-100016.0 ppm
2019-01-155810-021-14353.80 ppm
2019-02-055810-002-132535.0 ppm
2019-02-055810-003-13407.20 ppm
2019-02-055810-007-134317.0 ppm
2019-02-055810-008-14331.60 ppm
2019-02-055810-010-1437ND
2019-02-055810-012-1439ND
2019-02-055810-014-14591.000 ppm
2019-02-055810-015-1502ND
2019-02-055810-016-1505ND
2019-02-085810-002-15451.20 ppm
2019-02-085810-007-1505ND
2019-02-265810-002-11101.60 ppm
2019-03-115810-002-1348ND
2019-03-115810-005-1413ND
2019-03-115810-006-14261.60 ppm
2019-03-115810-007-1431ND
2019-03-115810-021-13471.10 ppm
2019-03-185810-002-1300ND
2019-03-185810-003-1330ND
2019-03-185810-004-1340ND
2019-04-115810-002-1330ND
2019-04-115810-008-15001.50 ppm
2019-04-115810-009-1350ND
2019-04-115810-010-1355ND
2019-04-115810-011-14001.90 ppm
2019-04-115810-021-12003.20 ppm
2019-05-085810-002-16200.910 ppm
2019-05-085810-012-164511.0 ppm
2019-05-085810-014-1650ND
2019-05-105810-013-1425ND
2019-05-105810-015-14304.80 ppm
2019-05-105810-016-14552.20 ppm
2019-05-165810-012-14302.40 ppm
2019-06-115810-002-15000.990 ppm
2019-06-115810-003-15100.630 ppm
2019-06-115810-004-15422.20 ppm
2019-06-115810-005-1545ND
2019-06-115810-006-15524.40 ppm
2019-06-115810-007-15511.80 ppm
2019-07-125810-002-10250.950 ppm
2019-07-125810-003-10302.10 ppm
2019-07-125810-004-10383.40 ppm
2019-07-125810-005-1035ND
2019-07-125810-006-10403.90 ppm
2019-07-125810-007-1055ND
2019-07-125810-021-10208.00 ppm
2019-08-195810-002-13550.800 ppm
2019-08-195810-008-14053.60 ppm
2019-08-195810-009-1400ND
2019-08-195810-021-13458.60 ppm
2019-09-265810-002-11250.700 ppm
2019-09-265810-010-13553.30 ppm
2019-09-265810-011-1335ND
2019-09-265810-012-131511.0 ppm
2019-09-265810-013-12001.60 ppm
2019-09-265810-014-1400ND
2019-09-265810-015-14223.50 ppm
2019-09-265810-016-14052.10 ppm
2019-09-265810-021-1100ND
2019-10-315810-002-13090.670 ppm
2019-10-315810-003-13159.90 ppm
2019-10-315810-005-1326ND
2019-10-315810-012-13302.70 ppm
2019-10-315810-021-13052.90 ppm
2019-11-275810-002-13300.600 ppm
2019-11-275810-003-1332ND
2019-11-275810-004-13402.20 ppm
2019-11-275810-006-14055.40 ppm
2019-11-275810-007-1410ND
2019-11-275810-008-14203.20 ppm
2019-11-275810-009-14300.620 ppm
2019-12-195810-002-15150.500 ppm
2019-12-195810-010-1525ND
2019-12-195810-011-1530ND
2019-12-195810-012-15551.000 ppm
2019-12-195810-013-1535ND
2019-12-195810-014-16001.60 ppm
2019-12-195810-015-1610ND
2019-12-195810-016-16151.40 ppm