Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Nitrate

Iredell Water Corporation

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

 

218

Samples

0

Samples exceeding legal limit (MCL)

69

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.02 ppm3512ND - 6.85 ppm
20151.18 ppm3512ND - 7.48 ppm
20160.944 ppm3610ND - 5.95 ppm
20171.09 ppm3611ND - 7.04 ppm
20181.07 ppm4013ND - 7.32 ppm
20191.09 ppm3611ND - 7.00 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
2014-01-0614016-446.85 ppm
2014-03-03140303-21ND
2014-03-03140303-20ND
2014-03-03140303-191.40 ppm
2014-03-03140303-25ND
2014-03-03140303-241.76 ppm
2014-03-03140303-23ND
2014-03-03140303-22ND
2014-03-03140303-10ND
2014-03-03140303-9ND
2014-04-15140415-19ND
2014-04-15140415-204.78 ppm
2014-04-15140415-211.63 ppm
2014-04-15140415-26ND
2014-04-15140415-81.21 ppm
2014-05-20140520-34ND
2014-06-17140617-292.08 ppm
2014-07-09140709-29ND
2014-07-09140709-305.51 ppm
2014-07-09140709-31ND
2014-07-09140709-32ND
2014-07-09140709-33ND
2014-08-11140811-2.1ND
2014-08-11140811-2.10ND
2014-08-11140811-2.2ND
2014-08-11140811-2.3ND
2014-08-11140811-2.4ND
2014-08-11140811-2.52.59 ppm
2014-08-11140811-2.6ND
2014-08-11140811-2.7ND
2014-08-11140811-2.8ND
2014-08-11140811-2.91.05 ppm
2014-08-13140813-32ND
2014-10-06141006-284.83 ppm
2014-11-10141110-08-012.05 ppm
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-01-061.64 ppm
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-01-062.13 ppm
2015-01-067.48 ppm
2015-01-06ND
2015-01-06ND
2015-04-141.81 ppm
2015-04-141.33 ppm
2015-04-14ND
2015-04-14ND
2015-04-14ND
2015-04-142.03 ppm
2015-04-147.44 ppm
2015-07-14ND
2015-07-14ND
2015-07-14ND
2015-07-145.63 ppm
2015-07-142.11 ppm
2015-07-141.20 ppm
2015-07-15ND
2015-07-15ND
2015-07-15ND
2015-07-15ND
2015-07-15ND
2015-07-15ND
2015-07-15ND
2015-10-146.47 ppm
2015-11-181.92 ppm
2016-01-13160113-12-014.79 ppm
2016-01-13160113-14-01ND
2016-01-13160113-13-02ND
2016-01-13160113-13-03ND
2016-01-13160113-13-011.49 ppm
2016-01-27160127-17-012.28 ppm
2016-02-23160223-19-01ND
2016-02-23160223-21-01ND
2016-02-23160223-20-01ND
2016-02-29160229-04-01ND
2016-03-16160316-27-01ND
2016-03-16160316-23-03ND
2016-03-16160316-23-02ND
2016-03-16160316-23-01ND
2016-04-26160426-25-015.36 ppm
2016-04-26160426-27-012.07 ppm
2016-04-26160426-26-01ND
2016-04-26160426-24-01ND
2016-05-11160511-24-01ND
2016-05-11160511-23-01ND
2016-05-11160511-22-01ND
2016-06-21160621-13-012.28 ppm
2016-06-21160621-14-01ND
2016-07-06160706-25-01ND
2016-07-06160706-27-01ND
2016-07-06160706-26-015.77 ppm
2016-08-24160824-10-01ND
2016-08-24160824-08-012.38 ppm
2016-08-24160824-12-01ND
2016-08-24160824-13-01ND
2016-08-24160824-11-01ND
2016-08-24160824-09-01ND
2016-10-04161004-32-01ND
2016-10-04161004-27-015.95 ppm
2016-10-04161004-33-011.63 ppm
2016-10-04161004-29-01ND
2017-01-18170118-39-011.62 ppm
2017-01-18170118-41-01ND
2017-01-18170118-40-01ND
2017-01-18170118-36-016.55 ppm
2017-01-18170118-34-01ND
2017-01-18170118-37-01ND
2017-01-18170118-35-01ND
2017-02-22170222-20-01ND
2017-02-22170222-09-011.62 ppm
2017-02-22170222-10-01ND
2017-02-22170222-10-022.27 ppm
2017-02-22170222-10-03ND
2017-03-22170322-18-01ND
2017-03-22170322-17-01ND
2017-03-22170322-19-012.09 ppm
2017-03-22170322-17-02ND
2017-03-22170322-20-01ND
2017-03-22170322-17-031.75 ppm
2017-04-05170405-18-01ND
2017-04-05170405-20-012.30 ppm
2017-04-05170405-16-03ND
2017-04-05170405-16-02ND
2017-04-05170405-17-015.76 ppm
2017-04-05170405-16-01ND
2017-04-05170405-19-01ND
2017-05-24170524-23-01ND
2017-05-24170524-25-01ND
2017-05-24170524-24-013.00 ppm
2017-05-24170524-26-01ND
2017-05-24170524-22-01ND
2017-06-27170627-18-02ND
2017-06-27170627-18-01ND
2017-06-28170628-10-01ND
2017-06-28170628-11-01ND
2017-07-19170719-22-017.04 ppm
2017-10-23171023-13-015.15 ppm
2018-01-10180110-26-01 ND
2018-01-10180110-27-01 ND
2018-01-10180110-28-01 ND
2018-01-10180110-29-01 3.10 ppm
2018-01-10180110-30-01 6.01 ppm
2018-01-10180110-33-01 ND
2018-01-10180110-34-01 ND
2018-01-10180110-35-01 ND
2018-01-10180110-36-01 ND
2018-02-21180221-22-01 ND
2018-02-21180221-22-02 1.60 ppm
2018-02-21180221-22-03 1.20 ppm
2018-02-21180221-22-04 ND
2018-02-21180221-22-05 1.97 ppm
2018-02-21180221-22-06 2.30 ppm
2018-03-21180321-16-01 2.04 ppm
2018-03-21180321-16-02 ND
2018-03-21180321-16-03 ND
2018-04-23180423-30-01 ND
2018-04-23180423-30-02 ND
2018-04-23180423-30-03 5.86 ppm
2018-04-23180423-30-04 ND
2018-04-23180423-30-05 ND
2018-04-23180423-30-06 ND
2018-04-23180423-32-01 ND
2018-04-23180423-33-01 ND
2018-04-23180423-34-01 ND
2018-04-23180423-35-01 ND
2018-05-02180502-15-01 2.19 ppm
2018-05-09180509-22-01 ND
2018-05-09180509-22-02 ND
2018-05-09180509-22-03 ND
2018-05-09180509-22-04 ND
2018-05-09180509-22-05 1.69 ppm
2018-06-27180627-25-01 1.61 ppm
2018-06-27180627-25-02 ND
2018-06-27180627-25-03 ND
2018-06-27180627-25-04 ND
2018-07-12180712-22-01 7.32 ppm
2018-10-09181009-43-01 5.81 ppm
2019-01-09190109-23-01 1.62 ppm
2019-01-09190109-23-02 1.50 ppm
2019-01-09190109-23-03 ND
2019-01-09190109-23-04 ND
2019-01-09190109-23-05 ND
2019-01-09190109-23-06 7.00 ppm
2019-02-06190206-24-01 ND
2019-02-06190206-24-02 ND
2019-02-06190206-24-03 ND
2019-03-12190312-35-01 ND
2019-03-12190312-37-01 ND
2019-03-12190312-39-01 ND
2019-04-10190410-21-01 2.28 ppm
2019-04-10190410-22-01 ND
2019-04-10190410-26-01 5.29 ppm
2019-04-10190410-26-02 1.65 ppm
2019-04-10190410-26-03 2.60 ppm
2019-05-08190508-22-01 2.35 ppm
2019-05-08190508-22-02 ND
2019-05-08190508-25 ND
2019-06-05190605-20-02 ND
2019-06-05190605-20-03 ND
2019-06-06190605-20-01 ND
2019-07-10190710-29-01 ND
2019-07-10190710-29-02 ND
2019-07-10190710-29-03 ND
2019-07-10190710-29-04 6.07 ppm
2019-08-15190815-29-01 ND
2019-08-15190815-29-02 ND
2019-08-15190815-29-03 ND
2019-09-16190916-27-01 2.73 ppm
2019-09-16190916-27-02 ND
2019-09-16190916-27-03 ND
2019-09-16190916-27-04 ND
2019-09-17190917-51-01 ND
2019-10-09191009-32-01 6.02 ppm