EWG's Tap Water Database — 2021 UPDATE



Lenoir City Utility Board

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.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20140.885 ppm220.570 ppm - 1.20 ppm
20150.870 ppm220.440 ppm - 1.30 ppm
20160.841 ppm220.472 ppm - 1.21 ppm
20170.710 ppm21ND - 1.42 ppm
20180.245 ppm220.142 ppm - 0.347 ppm
20190.815 ppm220.510 ppm - 1.12 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 Result
2014-03-120.570 ppm
2014-03-121.20 ppm
2015-03-180.440 ppm
2015-03-181.30 ppm
2016-03-090.472 ppm
2016-03-091.21 ppm
2017-03-081.42 ppm
2018-02-260.347 ppm
2018-02-260.142 ppm
2019-03-270.510 ppm
2019-03-271.12 ppm