EWG's Tap Water Database



Bennington 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
20100.585 ppm220.530 ppm - 0.640 ppm
20110.665 ppm220.630 ppm - 0.700 ppm
20130.620 ppm220.590 ppm - 0.650 ppm
20140.350 ppm220.300 ppm - 0.400 ppm
20150.300 ppm220.200 ppm - 0.400 ppm

ppm = parts per million.

State and national drinking water standards and health guidelines

Health Guideline 0.14 ppm

The health guideline of 0.14 ppm for nitrate was defined in a peer-reviewed scientific study by EWG and corresponds to one-in-one-million annual cancer risk level.

ppm = parts per million.

EPA Maximum Contaminant
Level (MCL) 10 ppm

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppm = parts per million.

EPA Maximum Contaminant
Level Goal (MCLG)10 ppm

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppm = parts per million.

All test results

Date Lab ID Result
2010-01-12IN317520.640 ppm
2010-01-12IN317690.530 ppm
2011-02-15IN354290.630 ppm
2011-02-15IN353930.700 ppm
2013-02-13IN422500.590 ppm
2013-02-13IN422460.650 ppm
2014-02-101402-02466-0020.300 ppm
2014-02-101402-02466-0010.400 ppm
2015-02-091502-02275-0020.200 ppm
2015-02-091502-02275-0010.400 ppm