EWG's Tap Water Database — 2021 UPDATE



Bolivar Peninsula SUD

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
20140.183 ppm330.0900 ppm - 0.240 ppm
20150.350 ppm330.120 ppm - 0.480 ppm
20160.137 ppm330.120 ppm - 0.150 ppm
20170.330 ppm330.170 ppm - 0.550 ppm
20180.0967 ppm330.0600 ppm - 0.120 ppm
20190.163 ppm440.0800 ppm - 0.330 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
2014-03-27AC484570.240 ppm
2014-03-27AC484560.220 ppm
2014-03-27AC484610.0900 ppm
2015-02-11AC800720.480 ppm
2015-02-11AC800710.450 ppm
2015-09-23AD081390.120 ppm
2016-08-05AD472760.150 ppm
2016-08-05AD472750.140 ppm
2016-08-05AD472770.120 ppm
2017-01-27AD673670.550 ppm
2017-01-27AD673660.170 ppm
2017-04-24AD805200.270 ppm
2018-02-05AE120790.120 ppm
2018-02-05AE120810.110 ppm
2018-02-05AE120800.0600 ppm
2019-01-11AE494340.330 ppm
2019-01-11AE494320.120 ppm
2019-01-11AE494330.120 ppm
2019-10-30AE878880.0800 ppm