Nitrate and nitrite

Oak Meadows Subdivision Water System

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. 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	ND	4	0	ND
2015	ND	4	0	ND
2016	0.0315 ppm	4	4	0.0310 ppm - 0.0320 ppm
2017	ND	4	0	ND
2018	ND	4	0	ND
2019	ND	8	0	ND

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL) 10 ppm

ppm = parts per million

All test results

Date	Lab ID	Result
2014-01-13	AD88317	ND
2014-01-13	AD88312	ND
2014-01-13	AD88317	ND
2014-01-13	AD88312	ND
2015-08-25	35204326004	ND
2015-08-25	35204326004	ND
2015-08-25	35204326005	ND
2015-08-25	35204326005	ND
2016-04-11	35238668007	0.0310 ppm
2016-04-11	35238668008	0.0320 ppm
2016-04-11	35238668008	0.0320 ppm
2016-04-11	35238668007	0.0310 ppm
2017-01-17	AE12816	ND
2017-01-17	AE12820	ND
2017-01-17	AE12820	ND
2017-01-17	AE12816	ND
2018-02-20	AE20707	ND
2018-02-20	AE20707	ND
2018-02-20	AE20706	ND
2018-02-20	AE20706	ND
2019-03-07	B1900951-002	ND
2019-03-07	B1900951-001	ND
2019-03-07	B1900951-001	ND
2019-03-07	B1900951-002	ND
2019-12-18	B1905685-001	ND
2019-12-18	B1905685-002	ND
2019-12-18	B1905685-001	ND
2019-12-18	B1905685-002	ND