EWG's Tap Water Database — 2019 UPDATE



Wellborn SUD

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
20121.98 ppm10100.0500 ppm - 6.30 ppm
20130.619 ppm10100.0390 ppm - 4.13 ppm
20140.844 ppm10100.0300 ppm - 3.45 ppm
20151.41 ppm10100.0600 ppm - 6.92 ppm
20160.428 ppm98ND - 1.20 ppm
20170.368 ppm880.0500 ppm - 1.51 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
2012-02-01AB799160.130 ppm
2012-02-01AB799170.0500 ppm
2012-02-01AB799215.75 ppm
2012-03-21AB847751.76 ppm
2012-06-18AB930600.170 ppm
2012-06-18AB930550.170 ppm
2012-06-18AB930591.57 ppm
2012-09-12AC007260.160 ppm
2012-09-12AC007246.30 ppm
2012-11-0112110940013.72 ppm
2013-02-0613022280010.1000 ppm
2013-02-0613022280024.13 ppm
2013-06-12Q13021830050.198 ppm
2013-06-12Q13021830060.226 ppm
2013-06-12Q13021830110.976 ppm
2013-12-12Q13176240110.0390 ppm
2013-12-12Q13176240090.0615 ppm
2013-12-12Q13176240180.0545 ppm
2013-12-12Q13176240150.0425 ppm
2013-12-12Q13176240120.364 ppm
2014-02-13AC428570.150 ppm
2014-02-13AC428580.140 ppm
2014-02-13AC428600.0300 ppm
2014-02-13AC428610.930 ppm
2014-02-13AC428590.930 ppm
2014-04-07AC493640.120 ppm
2014-04-07AC493630.0700 ppm
2014-04-07AC493650.0600 ppm
2014-09-10AC664673.45 ppm
2014-12-16AC750042.56 ppm
2015-03-24AC857840.0700 ppm
2015-03-24AC857830.400 ppm
2015-03-24AC858010.140 ppm
2015-03-24AC858022.23 ppm
2015-03-24AC857952.27 ppm
2015-03-24AC857940.0700 ppm
2015-03-24AC857930.0700 ppm
2015-05-27AC933530.0600 ppm
2015-09-30AD090666.92 ppm
2015-12-07AD156081.85 ppm
2016-03-09AD277830.0600 ppm
2016-03-09AD277680.0700 ppm
2016-03-09AD277671.06 ppm
2016-03-09AD277611.05 ppm
2016-06-14AD403340.0600 ppm
2016-06-14AD403350.210 ppm
2016-09-30AD521571.20 ppm
2016-12-08AD613790.140 ppm
2017-03-07AD735990.0500 ppm
2017-03-07AD736040.220 ppm
2017-03-07AD735850.220 ppm
2017-05-22AD849800.340 ppm
2017-09-19AD966580.470 ppm
2017-11-21AE054801.51 ppm
2017-11-21AE054780.0600 ppm
2017-11-21AE054790.0700 ppm