Nitrate

Hill Air Force Base

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

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	0.500 ppm	4	2	ND - 1.10 ppm
2015	0.786 ppm	7	5	ND - 1.50 ppm
2016	0.800 ppm	7	5	ND - 1.50 ppm
2017	0.756 ppm	4	3	ND - 1.50 ppm
2018	0.780 ppm	4	3	ND - 1.61 ppm
2019	0.747 ppm	4	4	0.119 ppm - 1.35 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
2014-10-02	1.10 ppm
2014-10-02	0.900 ppm
2014-10-02	ND
2014-11-17	ND
2015-06-25	0.500 ppm
2015-07-21	1.50 ppm
2015-07-21	1.000 ppm
2015-07-21	1.50 ppm
2015-07-21	ND
2015-07-21	1.000 ppm
2015-07-21	ND
2016-01-06	1.50 ppm
2016-01-06	1.10 ppm
2016-01-06	1.10 ppm
2016-01-06	ND
2016-01-06	1.50 ppm
2016-01-06	ND
2016-06-15	0.400 ppm
2017-01-24	ND
2017-01-24	1.20 ppm
2017-03-02	1.50 ppm
2017-08-09	0.326 ppm
2018-01-11	0.353 ppm
2018-01-15	1.16 ppm
2018-01-15	1.61 ppm
2018-01-15	ND
2019-01-16	0.119 ppm
2019-01-16	0.380 ppm
2019-01-16	1.14 ppm
2019-01-29	1.35 ppm