EWG's Tap Water Database — 2019 UPDATE



Sugarmill Woods SD

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
20120.635 ppm220.620 ppm - 0.650 ppm
20130.650 ppm220.640 ppm - 0.660 ppm
20140.445 ppm220.440 ppm - 0.450 ppm
20150.495 ppm220.480 ppm - 0.510 ppm
20160.805 ppm220.770 ppm - 0.840 ppm
20170.720 ppm220.710 ppm - 0.730 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
2012-04-020.650 ppm
2012-04-020.620 ppm
2013-04-080.660 ppm
2013-04-080.640 ppm
2014-04-020.440 ppm
2014-04-020.450 ppm
2015-04-020.510 ppm
2015-04-020.480 ppm
2016-04-190.840 ppm
2016-04-190.770 ppm
2017-05-230.730 ppm
2017-05-230.710 ppm