EWG's Tap Water Database — 2019 UPDATE



City of Georgetown

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
20122.32 ppm330.260 ppm - 3.51 ppm
20131.45 ppm660.0370 ppm - 2.87 ppm
20142.21 ppm330.170 ppm - 3.25 ppm
20152.42 ppm330.170 ppm - 3.77 ppm
20162.10 ppm550.1000 ppm - 3.87 ppm
20171.68 ppm440.0800 ppm - 3.52 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
2012-04-12AB867703.20 ppm
2012-04-12AB867713.51 ppm
2012-04-12AB867720.260 ppm
2013-02-1213023400010.270 ppm
2013-03-2513038390010.510 ppm
2013-06-03Q13018270232.87 ppm
2013-06-03Q13018270142.87 ppm
2013-09-25Q13085170052.16 ppm
2013-09-25Q13085170030.0370 ppm
2014-02-26AC446553.25 ppm
2014-02-26AC446520.170 ppm
2014-05-06AC530833.21 ppm
2015-03-05AC827963.33 ppm
2015-03-05AC827780.170 ppm
2015-03-05AC827813.77 ppm
2016-02-09AD228683.32 ppm
2016-02-09AD228693.87 ppm
2016-02-09AD228670.580 ppm
2016-04-21AD336890.1000 ppm
2016-04-21AD336882.62 ppm
2017-01-23AD659562.89 ppm
2017-01-23AD659553.52 ppm
2017-01-23AD659570.230 ppm
2017-07-06AD883940.0800 ppm