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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

Ann Arbor

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

 

82

Samples

0

Samples exceeding legal limit (MCL)

54

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.332 ppm7749ND - 0.900 ppm
2015N/A00N/A
20160.850 ppm220.800 ppm - 0.900 ppm
20170.800 ppm110.200 ppm - 0.800 ppm
20180.700 ppm110.300 ppm - 0.700 ppm
20190.400 ppm110.300 ppm - 0.800 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
2014-03-04LLF10951ND
2014-04-23LLF155890.600 ppm
2014-04-23LLF155990.700 ppm
2014-04-23LLF155980.500 ppm
2014-04-23LLF155960.600 ppm
2014-04-23LLF155930.600 ppm
2014-04-23LLF155920.600 ppm
2014-04-23LLF155880.600 ppm
2014-04-23LLF155970.600 ppm
2014-04-23LLF155950.700 ppm
2014-04-23LLF155940.700 ppm
2014-04-23LLF155900.600 ppm
2014-04-23LLF155910.900 ppm
2014-06-03LLF20896ND
2014-06-17LLF232170.600 ppm
2014-06-17LLF232200.500 ppm
2014-06-17LLF232180.700 ppm
2014-06-17LLF232220.600 ppm
2014-06-17LLF232210.600 ppm
2014-06-17LLF232160.600 ppm
2014-06-17LLF232190.600 ppm
2014-06-18LLF23467ND
2014-06-18LLF23466ND
2014-06-18LLF234610.600 ppm
2014-06-18LLF234600.500 ppm
2014-06-18LLF234590.500 ppm
2014-06-18LLF234640.500 ppm
2014-06-18LLF234650.500 ppm
2014-06-18LLF234620.600 ppm
2014-06-18LLF234630.500 ppm
2014-07-21LLF28469ND
2014-07-21LLF28470ND
2014-07-21LLF284730.400 ppm
2014-07-21LLF28475ND
2014-07-21LLF28474ND
2014-07-21LLF284760.400 ppm
2014-07-21LLF284720.400 ppm
2014-07-21LLF284780.400 ppm
2014-07-22LLF288000.500 ppm
2014-07-22LLF287990.400 ppm
2014-07-22LLF287970.400 ppm
2014-07-22LLF287960.500 ppm
2014-07-22LLF288010.400 ppm
2014-07-22LLF28798ND
2014-07-22LLF284710.400 ppm
2014-08-05LLF311560.500 ppm
2014-08-05LLF31151ND
2014-08-05LLF31150ND
2014-08-05LLF311480.500 ppm
2014-08-05LLF311540.500 ppm
2014-08-05LLF311530.500 ppm
2014-08-05LLF311520.500 ppm
2014-08-05LLF311490.400 ppm
2014-08-05LLF311550.500 ppm
2014-08-06LLF31367ND
2014-08-06LLF313700.400 ppm
2014-08-06LLF313660.400 ppm
2014-08-06LLF313690.400 ppm
2014-08-06LLF313710.400 ppm
2014-08-06LLF313680.400 ppm
2014-08-06LLF31372ND
2014-09-09LLF37511ND
2014-09-09LLF37516ND
2014-09-09LLF37510ND
2014-09-09LLF37509ND
2014-09-09LLF37512ND
2014-09-09LLF37517ND
2014-09-09LLF37514ND
2014-09-09LLF37513ND
2014-09-10LLF37784ND
2014-09-10LLF37786ND
2014-09-10LLF37789ND
2014-09-10LLF37785ND
2014-09-10LLF37787ND
2014-09-10LLF37788ND
2014-09-10LLF377900.400 ppm
2014-11-15LLF28477ND
2016-06-010.800 ppm*
2016-06-010.900 ppm*
2017-06-010.800 ppm*
2018-06-010.700 ppm*
2019-06-010.400 ppm*

* Sample result is taken from the system's CCR report.