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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

City of Walterboro

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.

MORE ABOUT THIS CONTAMINANT

 

60

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.00200 ppm111ND - 0.0220 ppm
2015ND110ND
2016ND110ND
2017ND100ND
2018ND90ND
2019ND80ND

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
2014-07-10AD42353ND
2014-07-10AD42352ND
2014-07-10AD42362ND
2014-07-10AD42361ND
2014-07-10AD42360ND
2014-07-10AD423590.0220 ppm
2014-07-10AD42357ND
2014-07-10AD42356ND
2014-07-10AD42355ND
2014-07-10AD42354ND
2014-07-10AD42358ND
2015-07-29AD58796ND
2015-07-29AD58797ND
2015-07-29AD58806ND
2015-07-29AD58809ND
2015-07-29AD58810ND
2015-07-29AD58811ND
2015-08-05AD59163ND
2015-08-05AD59197ND
2015-08-05AD59196ND
2015-08-05AD59193ND
2015-08-05AD59162ND
2016-07-19AD79219ND
2016-07-19AD79220ND
2016-07-19AD79221ND
2016-07-19AD79222ND
2016-07-19AD79223ND
2016-07-19AD79224ND
2016-07-19AD79225ND
2016-07-26AD79537ND
2016-07-26AD79534ND
2016-07-26AD79535ND
2016-07-26AD79536ND
2017-08-24AD99593ND
2017-08-24AD99601ND
2017-08-24AD99592ND
2017-08-24AD99596ND
2017-08-24AD99597ND
2017-08-24AD99595ND
2017-08-24AD99599ND
2017-08-24AD99598ND
2017-08-24AD99594ND
2017-08-24AD99600ND
2018-11-13AE21217ND
2018-11-13AE21216ND
2018-11-13AE21215ND
2018-11-26AE21759ND
2018-11-26AE21760ND
2018-11-26AE21761ND
2018-11-26AE21762ND
2018-11-26AE21763ND
2018-11-26AE21764ND
2019-10-22AE39023ND
2019-10-22AE39024ND
2019-10-22AE39030ND
2019-10-23AE39151ND
2019-10-23AE39129ND
2019-10-23AE39131ND
2019-10-24AE39276ND
2019-10-24AE39272ND