EWG's Tap Water Database — 2021 UPDATE



Milan Water Department

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
20140.614 ppm110.614 ppm
20150.569 ppm110.569 ppm
20160.601 ppm110.601 ppm
20170.640 ppm110.640 ppm
20180.564 ppm110.564 ppm
20190.638 ppm110.638 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
2014-01-220.614 ppm
2015-03-160.569 ppm
2016-01-260.601 ppm
2017-01-230.640 ppm
2018-01-090.564 ppm
2019-01-170.638 ppm