EWG's Tap Water Database — 2019 UPDATE



City of Stuart - Water Plant

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
20120.190 ppm110.190 ppm
20131.30 ppm111.30 ppm
20140.210 ppm220.190 ppm - 0.230 ppm
20150.200 ppm110.200 ppm
20160.160 ppm110.160 ppm
20170.140 ppm110.140 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
2012-06-060.190 ppm
2013-06-141.30 ppm
2014-07-070.230 ppm
2014-12-160.190 ppm
2015-12-030.200 ppm
2016-06-030.160 ppm
2017-05-240.140 ppm